mirror of
https://github.com/Luzifer/cloudkeys-go.git
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1577 lines
62 KiB
Go
1577 lines
62 KiB
Go
package expression
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import (
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"fmt"
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"strings"
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)
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// conditionMode specifies the types of the struct conditionBuilder,
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// representing the different types of Conditions (i.e. And, Or, Between, ...)
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type conditionMode int
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const (
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// unsetCond catches errors for unset ConditionBuilder structs
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unsetCond conditionMode = iota
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// equalCond represents the Equals Condition
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equalCond
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// notEqualCond represents the Not Equals Condition
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notEqualCond
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// lessThanCond represents the LessThan Condition
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lessThanCond
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// lessThanEqualCond represents the LessThanOrEqual Condition
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lessThanEqualCond
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// greaterThanCond represents the GreaterThan Condition
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greaterThanCond
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// greaterThanEqualCond represents the GreaterThanEqual Condition
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greaterThanEqualCond
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// andCond represents the Logical And Condition
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andCond
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// orCond represents the Logical Or Condition
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orCond
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// notCond represents the Logical Not Condition
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notCond
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// betweenCond represents the Between Condition
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betweenCond
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// inCond represents the In Condition
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inCond
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// attrExistsCond represents the Attribute Exists Condition
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attrExistsCond
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// attrNotExistsCond represents the Attribute Not Exists Condition
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attrNotExistsCond
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// attrTypeCond represents the Attribute Type Condition
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attrTypeCond
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// beginsWithCond represents the Begins With Condition
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beginsWithCond
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// containsCond represents the Contains Condition
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containsCond
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)
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// DynamoDBAttributeType specifies the type of an DynamoDB item attribute. This
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// enum is used in the AttributeType() function in order to be explicit about
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// the DynamoDB type that is being checked and ensure compile time checks.
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// More Informatin at http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.OperatorsAndFunctions.html#Expressions.OperatorsAndFunctions.Functions
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type DynamoDBAttributeType string
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const (
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// String represents the DynamoDB String type
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String DynamoDBAttributeType = "S"
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// StringSet represents the DynamoDB String Set type
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StringSet = "SS"
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// Number represents the DynamoDB Number type
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Number = "N"
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// NumberSet represents the DynamoDB Number Set type
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NumberSet = "NS"
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// Binary represents the DynamoDB Binary type
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Binary = "B"
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// BinarySet represents the DynamoDB Binary Set type
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BinarySet = "BS"
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// Boolean represents the DynamoDB Boolean type
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Boolean = "BOOL"
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// Null represents the DynamoDB Null type
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Null = "NULL"
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// List represents the DynamoDB List type
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List = "L"
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// Map represents the DynamoDB Map type
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Map = "M"
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)
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// ConditionBuilder represents Condition Expressions and Filter Expressions
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// in DynamoDB. ConditionBuilders are one of the building blocks of the Builder
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// struct. Since Filter Expressions support all the same functions and formats
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// as Condition Expressions, ConditionBuilders represents both types of
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// Expressions.
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// More Information at: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.ConditionExpressions.html
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// More Information on Filter Expressions: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Query.html#Query.FilterExpression
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type ConditionBuilder struct {
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operandList []OperandBuilder
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conditionList []ConditionBuilder
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mode conditionMode
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}
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// Equal returns a ConditionBuilder representing the equality clause of the two
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// argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the equal clause of the item attribute "foo" and
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// // the value 5
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// condition := expression.Equal(expression.Name("foo"), expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Equal(expression.Name("foo"), expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "foo = :five"
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func Equal(left, right OperandBuilder) ConditionBuilder {
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return ConditionBuilder{
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operandList: []OperandBuilder{left, right},
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mode: equalCond,
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}
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}
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// Equal returns a ConditionBuilder representing the equality clause of the two
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// argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the equal clause of the item attribute "foo" and
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// // the value 5
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// condition := expression.Name("foo").Equal(expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Name("foo").Equal(expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "foo = :five"
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func (nb NameBuilder) Equal(right OperandBuilder) ConditionBuilder {
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return Equal(nb, right)
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}
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// Equal returns a ConditionBuilder representing the equality clause of the two
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// argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the equal clause of the item attribute "foo" and
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// // the value 5
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// condition := expression.Value(5).Equal(expression.Name("foo"))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Value(5).Equal(expression.Name("foo"))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// ":five = foo"
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func (vb ValueBuilder) Equal(right OperandBuilder) ConditionBuilder {
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return Equal(vb, right)
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}
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// Equal returns a ConditionBuilder representing the equality clause of the two
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// argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the equal clause of the size of the item
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// // attribute "foo" and the value 5
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// condition := expression.Size(expression.Name("foo")).Equal(expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Size(expression.Name("foo")).Equal(expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "size (foo) = :five"
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func (sb SizeBuilder) Equal(right OperandBuilder) ConditionBuilder {
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return Equal(sb, right)
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}
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// NotEqual returns a ConditionBuilder representing the not equal clause of the
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// two argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the not equal clause of the item attribute "foo"
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// // and the value 5
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// condition := expression.NotEqual(expression.Name("foo"), expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.NotEqual(expression.Name("foo"), expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "foo <> :five"
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func NotEqual(left, right OperandBuilder) ConditionBuilder {
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return ConditionBuilder{
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operandList: []OperandBuilder{left, right},
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mode: notEqualCond,
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}
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}
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// NotEqual returns a ConditionBuilder representing the not equal clause of the
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// two argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the not equal clause of the item attribute "foo"
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// // and the value 5
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// condition := expression.Name("foo").NotEqual(expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Name("foo").NotEqual(expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "foo <> :five"
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func (nb NameBuilder) NotEqual(right OperandBuilder) ConditionBuilder {
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return NotEqual(nb, right)
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}
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// NotEqual returns a ConditionBuilder representing the not equal clause of the
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// two argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the not equal clause of the item attribute "foo"
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// // and the value 5
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// condition := expression.Value(5).NotEqual(expression.Name("foo"))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Value(5).NotEqual(expression.Name("foo"))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// ":five <> foo"
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func (vb ValueBuilder) NotEqual(right OperandBuilder) ConditionBuilder {
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return NotEqual(vb, right)
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}
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// NotEqual returns a ConditionBuilder representing the not equal clause of the
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// two argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the not equal clause of the size of the item
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// // attribute "foo" and the value 5
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// condition := expression.Size(expression.Name("foo")).NotEqual(expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Size(expression.Name("foo")).NotEqual(expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "size (foo) <> :five"
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func (sb SizeBuilder) NotEqual(right OperandBuilder) ConditionBuilder {
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return NotEqual(sb, right)
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}
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// LessThan returns a ConditionBuilder representing the less than clause of the
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// two argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the less than clause of the item attribute "foo"
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// // and the value 5
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// condition := expression.LessThan(expression.Name("foo"), expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.LessThan(expression.Name("foo"), expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "foo < :five"
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func LessThan(left, right OperandBuilder) ConditionBuilder {
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return ConditionBuilder{
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operandList: []OperandBuilder{left, right},
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mode: lessThanCond,
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}
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}
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// LessThan returns a ConditionBuilder representing the less than clause of the
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// two argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the less than clause of the item attribute "foo"
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// // and the value 5
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// condition := expression.Name("foo").LessThan(expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Name("foo").LessThan(expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "foo < :five"
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func (nb NameBuilder) LessThan(right OperandBuilder) ConditionBuilder {
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return LessThan(nb, right)
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}
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// LessThan returns a ConditionBuilder representing the less than clause of the
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// two argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the less than clause of the item attribute "foo"
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// // and the value 5
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// condition := expression.Value(5).LessThan(expression.Name("foo"))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Value(5).LessThan(expression.Name("foo"))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// ":five < foo"
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func (vb ValueBuilder) LessThan(right OperandBuilder) ConditionBuilder {
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return LessThan(vb, right)
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}
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// LessThan returns a ConditionBuilder representing the less than clause of the
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// two argument OperandBuilders. The resulting ConditionBuilder can be used as a
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// part of other Condition Expressions or as an argument to the WithCondition()
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// method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the less than clause of the size of the item
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// // attribute "foo" and the value 5
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// condition := expression.Size(expression.Name("foo")).LessThan(expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Size(expression.Name("foo")).LessThan(expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "size (foo) < :five"
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func (sb SizeBuilder) LessThan(right OperandBuilder) ConditionBuilder {
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return LessThan(sb, right)
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}
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// LessThanEqual returns a ConditionBuilder representing the less than equal to
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// clause of the two argument OperandBuilders. The resulting ConditionBuilder
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// can be used as a part of other Condition Expressions or as an argument to the
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// WithCondition() method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the less than equal to clause of the item
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// // attribute "foo" and the value 5
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// condition := expression.LessThanEqual(expression.Name("foo"), expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.LessThanEqual(expression.Name("foo"), expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "foo <= :five"
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func LessThanEqual(left, right OperandBuilder) ConditionBuilder {
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return ConditionBuilder{
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operandList: []OperandBuilder{left, right},
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mode: lessThanEqualCond,
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}
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}
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// LessThanEqual returns a ConditionBuilder representing the less than equal to
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// clause of the two argument OperandBuilders. The resulting ConditionBuilder
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// can be used as a part of other Condition Expressions or as an argument to the
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// WithCondition() method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the less than equal to clause of the item
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// // attribute "foo" and the value 5
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// condition := expression.Name("foo").LessThanEqual(expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Name("foo").LessThanEqual(expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "foo <= :five"
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func (nb NameBuilder) LessThanEqual(right OperandBuilder) ConditionBuilder {
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return LessThanEqual(nb, right)
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}
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// LessThanEqual returns a ConditionBuilder representing the less than equal to
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// clause of the two argument OperandBuilders. The resulting ConditionBuilder
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// can be used as a part of other Condition Expressions or as an argument to the
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// WithCondition() method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the less than equal to clause of the item
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// // attribute "foo" and the value 5
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// condition := expression.Value(5).LessThanEqual(expression.Name("foo"))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Value(5).LessThanEqual(expression.Name("foo"))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// ":five <= foo"
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func (vb ValueBuilder) LessThanEqual(right OperandBuilder) ConditionBuilder {
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return LessThanEqual(vb, right)
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}
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|
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// LessThanEqual returns a ConditionBuilder representing the less than equal to
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// clause of the two argument OperandBuilders. The resulting ConditionBuilder
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// can be used as a part of other Condition Expressions or as an argument to the
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// WithCondition() method for the Builder struct.
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//
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// Example:
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//
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// // condition represents the less than equal to clause of the size of the
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// // item attribute "foo" and the value 5
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// condition := expression.Size(expression.Name("foo")).LessThanEqual(expression.Value(5))
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//
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// // Used in another Condition Expression
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// anotherCondition := expression.Not(condition)
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// // Used to make an Builder
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// builder := expression.NewBuilder().WithCondition(condition)
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//
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// Expression Equivalent:
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//
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// expression.Size(expression.Name("foo")).LessThanEqual(expression.Value(5))
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// // Let :five be an ExpressionAttributeValue representing the value 5
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// "size (foo) <= :five"
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func (sb SizeBuilder) LessThanEqual(right OperandBuilder) ConditionBuilder {
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return LessThanEqual(sb, right)
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}
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// GreaterThan returns a ConditionBuilder representing the greater than clause
|
|
// of the two argument OperandBuilders. The resulting ConditionBuilder can be
|
|
// used as a part of other Condition Expressions or as an argument to the
|
|
// WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the greater than clause of the item attribute
|
|
// // "foo" and the value 5
|
|
// condition := expression.GreaterThan(expression.Name("foo"), expression.Value(5))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.GreaterThan(expression.Name("foo"), expression.Value(5))
|
|
// // Let :five be an ExpressionAttributeValue representing the value 5
|
|
// "foo > :five"
|
|
func GreaterThan(left, right OperandBuilder) ConditionBuilder {
|
|
return ConditionBuilder{
|
|
operandList: []OperandBuilder{left, right},
|
|
mode: greaterThanCond,
|
|
}
|
|
}
|
|
|
|
// GreaterThan returns a ConditionBuilder representing the greater than clause
|
|
// of the two argument OperandBuilders. The resulting ConditionBuilder can be
|
|
// used as a part of other Condition Expressions or as an argument to the
|
|
// WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the greater than clause of the item attribute
|
|
// // "foo" and the value 5
|
|
// condition := expression.Name("foo").GreaterThan(expression.Value(5))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("foo").GreaterThan(expression.Value(5))
|
|
// // Let :five be an ExpressionAttributeValue representing the value 5
|
|
// "foo > :five"
|
|
func (nb NameBuilder) GreaterThan(right OperandBuilder) ConditionBuilder {
|
|
return GreaterThan(nb, right)
|
|
}
|
|
|
|
// GreaterThan returns a ConditionBuilder representing the greater than clause
|
|
// of the two argument OperandBuilders. The resulting ConditionBuilder can be
|
|
// used as a part of other Condition Expressions or as an argument to the
|
|
// WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the greater than clause of the item attribute
|
|
// // "foo" and the value 5
|
|
// condition := expression.Value(5).GreaterThan(expression.Name("foo"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Value(5).GreaterThan(expression.Name("foo"))
|
|
// // Let :five be an ExpressionAttributeValue representing the value 5
|
|
// ":five > foo"
|
|
func (vb ValueBuilder) GreaterThan(right OperandBuilder) ConditionBuilder {
|
|
return GreaterThan(vb, right)
|
|
}
|
|
|
|
// GreaterThan returns a ConditionBuilder representing the greater than
|
|
// clause of the two argument OperandBuilders. The resulting ConditionBuilder
|
|
// can be used as a part of other Condition Expressions or as an argument to the
|
|
// WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the greater than clause of the size of the item
|
|
// // attribute "foo" and the value 5
|
|
// condition := expression.Size(expression.Name("foo")).GreaterThan(expression.Value(5))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Size(expression.Name("foo")).GreaterThan(expression.Value(5))
|
|
// // Let :five be an ExpressionAttributeValue representing the value 5
|
|
// "size (foo) > :five"
|
|
func (sb SizeBuilder) GreaterThan(right OperandBuilder) ConditionBuilder {
|
|
return GreaterThan(sb, right)
|
|
}
|
|
|
|
// GreaterThanEqual returns a ConditionBuilder representing the greater than
|
|
// equal to clause of the two argument OperandBuilders. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the greater than equal to clause of the item
|
|
// // attribute "foo" and the value 5
|
|
// condition := expression.GreaterThanEqual(expression.Name("foo"), expression.Value(5))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.GreaterThanEqual(expression.Name("foo"), expression.Value(5))
|
|
// // Let :five be an ExpressionAttributeValue representing the value 5
|
|
// "foo >= :five"
|
|
func GreaterThanEqual(left, right OperandBuilder) ConditionBuilder {
|
|
return ConditionBuilder{
|
|
operandList: []OperandBuilder{left, right},
|
|
mode: greaterThanEqualCond,
|
|
}
|
|
}
|
|
|
|
// GreaterThanEqual returns a ConditionBuilder representing the greater than
|
|
// equal to clause of the two argument OperandBuilders. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the greater than equal to clause of the item
|
|
// // attribute "foo" and the value 5
|
|
// condition := expression.Name("foo").GreaterThanEqual(expression.Value(5))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("foo").GreaterThanEqual(expression.Value(5))
|
|
// // Let :five be an ExpressionAttributeValue representing the value 5
|
|
// "foo >= :five"
|
|
func (nb NameBuilder) GreaterThanEqual(right OperandBuilder) ConditionBuilder {
|
|
return GreaterThanEqual(nb, right)
|
|
}
|
|
|
|
// GreaterThanEqual returns a ConditionBuilder representing the greater than
|
|
// equal to clause of the two argument OperandBuilders. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the greater than equal to clause of the item
|
|
// // attribute "foo" and the value 5
|
|
// condition := expression.Value(5).GreaterThanEqual(expression.Name("foo"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Value(5).GreaterThanEqual(expression.Name("foo"))
|
|
// // Let :five be an ExpressionAttributeValue representing the value 5
|
|
// ":five >= foo"
|
|
func (vb ValueBuilder) GreaterThanEqual(right OperandBuilder) ConditionBuilder {
|
|
return GreaterThanEqual(vb, right)
|
|
}
|
|
|
|
// GreaterThanEqual returns a ConditionBuilder representing the greater than
|
|
// equal to clause of the two argument OperandBuilders. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the greater than equal to clause of the size of
|
|
// // the item attribute "foo" and the value 5
|
|
// condition := expression.Size(expression.Name("foo")).GreaterThanEqual(expression.Value(5))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Size(expression.Name("foo")).GreaterThanEqual(expression.Value(5))
|
|
// // Let :five be an ExpressionAttributeValue representing the value 5
|
|
// "size (foo) >= :five"
|
|
func (sb SizeBuilder) GreaterThanEqual(right OperandBuilder) ConditionBuilder {
|
|
return GreaterThanEqual(sb, right)
|
|
}
|
|
|
|
// And returns a ConditionBuilder representing the logical AND clause of the
|
|
// argument ConditionBuilders. The resulting ConditionBuilder can be used as a
|
|
// part of other Condition Expressions or as an argument to the WithCondition()
|
|
// method for the Builder struct. Note that And() can take a variadic number of
|
|
// ConditionBuilders as arguments.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the item attribute "Name" is
|
|
// // equal to value "Generic Name" AND the item attribute "Age" is less
|
|
// // than value 40
|
|
// condition := expression.And(expression.Name("Name").Equal(expression.Value("Generic Name")), expression.Name("Age").LessThan(expression.Value(40)))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.And(expression.Name("Name").Equal(expression.Value("Generic Name")), expression.Name("Age").LessThan(expression.Value(40)))
|
|
// // Let #NAME, :name, and :forty be ExpressionAttributeName and
|
|
// // ExpressionAttributeValues representing the item attribute "Name", the
|
|
// // value "Generic Name", and the value 40
|
|
// "(#NAME = :name) AND (Age < :forty)"
|
|
func And(left, right ConditionBuilder, other ...ConditionBuilder) ConditionBuilder {
|
|
other = append([]ConditionBuilder{left, right}, other...)
|
|
return ConditionBuilder{
|
|
conditionList: other,
|
|
mode: andCond,
|
|
}
|
|
}
|
|
|
|
// And returns a ConditionBuilder representing the logical AND clause of the
|
|
// argument ConditionBuilders. The resulting ConditionBuilder can be used as a
|
|
// part of other Condition Expressions or as an argument to the WithCondition()
|
|
// method for the Builder struct. Note that And() can take a variadic number of
|
|
// ConditionBuilders as arguments.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the item attribute "Name" is
|
|
// // equal to value "Generic Name" AND the item attribute "Age" is less
|
|
// // than value 40
|
|
// condition := expression.Name("Name").Equal(expression.Value("Generic Name")).And(expression.Name("Age").LessThan(expression.Value(40)))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("Name").Equal(expression.Value("Generic Name")).And(expression.Name("Age").LessThan(expression.Value(40)))
|
|
// // Let #NAME, :name, and :forty be ExpressionAttributeName and
|
|
// // ExpressionAttributeValues representing the item attribute "Name", the
|
|
// // value "Generic Name", and the value 40
|
|
// "(#NAME = :name) AND (Age < :forty)"
|
|
func (cb ConditionBuilder) And(right ConditionBuilder, other ...ConditionBuilder) ConditionBuilder {
|
|
return And(cb, right, other...)
|
|
}
|
|
|
|
// Or returns a ConditionBuilder representing the logical OR clause of the
|
|
// argument ConditionBuilders. The resulting ConditionBuilder can be used as a
|
|
// part of other Condition Expressions or as an argument to the WithCondition()
|
|
// method for the Builder struct. Note that Or() can take a variadic number of
|
|
// ConditionBuilders as arguments.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the item attribute "Price" is
|
|
// // less than the value 100 OR the item attribute "Rating" is greater than
|
|
// // the value 8
|
|
// condition := expression.Or(expression.Name("Price").Equal(expression.Value(100)), expression.Name("Rating").LessThan(expression.Value(8)))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Or(expression.Name("Price").Equal(expression.Value(100)), expression.Name("Rating").LessThan(expression.Value(8)))
|
|
// // Let :price and :rating be ExpressionAttributeValues representing the
|
|
// // the value 100 and value 8 respectively
|
|
// "(Price < :price) OR (Rating > :rating)"
|
|
func Or(left, right ConditionBuilder, other ...ConditionBuilder) ConditionBuilder {
|
|
other = append([]ConditionBuilder{left, right}, other...)
|
|
return ConditionBuilder{
|
|
conditionList: other,
|
|
mode: orCond,
|
|
}
|
|
}
|
|
|
|
// Or returns a ConditionBuilder representing the logical OR clause of the
|
|
// argument ConditionBuilders. The resulting ConditionBuilder can be used as a
|
|
// part of other Condition Expressions or as an argument to the WithCondition()
|
|
// method for the Builder struct. Note that Or() can take a variadic number of
|
|
// ConditionBuilders as arguments.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the item attribute "Price" is
|
|
// // less than the value 100 OR the item attribute "Rating" is greater than
|
|
// // the value 8
|
|
// condition := expression.Name("Price").Equal(expression.Value(100)).Or(expression.Name("Rating").LessThan(expression.Value(8)))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("Price").Equal(expression.Value(100)).Or(expression.Name("Rating").LessThan(expression.Value(8)))
|
|
// // Let :price and :rating be ExpressionAttributeValues representing the
|
|
// // the value 100 and value 8 respectively
|
|
// "(Price < :price) OR (Rating > :rating)"
|
|
func (cb ConditionBuilder) Or(right ConditionBuilder, other ...ConditionBuilder) ConditionBuilder {
|
|
return Or(cb, right, other...)
|
|
}
|
|
|
|
// Not returns a ConditionBuilder representing the logical NOT clause of the
|
|
// argument ConditionBuilder. The resulting ConditionBuilder can be used as a
|
|
// part of other Condition Expressions or as an argument to the WithCondition()
|
|
// method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the item attribute "Name"
|
|
// // does not begin with "test"
|
|
// condition := expression.Not(expression.Name("Name").BeginsWith("test"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Not(expression.Name("Name").BeginsWith("test"))
|
|
// // Let :prefix be an ExpressionAttributeValue representing the value
|
|
// // "test"
|
|
// "NOT (begins_with (:prefix))"
|
|
func Not(conditionBuilder ConditionBuilder) ConditionBuilder {
|
|
return ConditionBuilder{
|
|
conditionList: []ConditionBuilder{conditionBuilder},
|
|
mode: notCond,
|
|
}
|
|
}
|
|
|
|
// Not returns a ConditionBuilder representing the logical NOT clause of the
|
|
// argument ConditionBuilder. The resulting ConditionBuilder can be used as a
|
|
// part of other Condition Expressions or as an argument to the WithCondition()
|
|
// method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the item attribute "Name"
|
|
// // does not begin with "test"
|
|
// condition := expression.Name("Name").BeginsWith("test").Not()
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("Name").BeginsWith("test").Not()
|
|
// // Let :prefix be an ExpressionAttributeValue representing the value
|
|
// // "test"
|
|
// "NOT (begins_with (:prefix))"
|
|
func (cb ConditionBuilder) Not() ConditionBuilder {
|
|
return Not(cb)
|
|
}
|
|
|
|
// Between returns a ConditionBuilder representing the result of the
|
|
// BETWEEN function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the value of the item
|
|
// // attribute "Rating" is between values 5 and 10
|
|
// condition := expression.Between(expression.Name("Rating"), expression.Value(5), expression.Value(10))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Between(expression.Name("Rating"), expression.Value(5), expression.Value(10))
|
|
// // Let :five and :ten be ExpressionAttributeValues representing the value
|
|
// // 5 and the value 10
|
|
// "Rating BETWEEN :five AND :ten"
|
|
func Between(op, lower, upper OperandBuilder) ConditionBuilder {
|
|
return ConditionBuilder{
|
|
operandList: []OperandBuilder{op, lower, upper},
|
|
mode: betweenCond,
|
|
}
|
|
}
|
|
|
|
// Between returns a ConditionBuilder representing the result of the
|
|
// BETWEEN function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the value of the item
|
|
// // attribute "Rating" is between values 5 and 10
|
|
// condition := expression.Name("Rating").Between(expression.Value(5), expression.Value(10))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("Rating").Between(expression.Value(5), expression.Value(10))
|
|
// // Let :five and :ten be ExpressionAttributeValues representing the value
|
|
// // 5 and the value 10
|
|
// "Rating BETWEEN :five AND :ten"
|
|
func (nb NameBuilder) Between(lower, upper OperandBuilder) ConditionBuilder {
|
|
return Between(nb, lower, upper)
|
|
}
|
|
|
|
// Between returns a ConditionBuilder representing the result of the
|
|
// BETWEEN function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the value 6 is between values
|
|
// // 5 and 10
|
|
// condition := expression.Value(6).Between(expression.Value(5), expression.Value(10))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Value(6).Between(expression.Value(5), expression.Value(10))
|
|
// // Let :six, :five and :ten be ExpressionAttributeValues representing the
|
|
// // values 6, 5, and 10 respectively
|
|
// ":six BETWEEN :five AND :ten"
|
|
func (vb ValueBuilder) Between(lower, upper OperandBuilder) ConditionBuilder {
|
|
return Between(vb, lower, upper)
|
|
}
|
|
|
|
// Between returns a ConditionBuilder representing the result of the
|
|
// BETWEEN function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the size of the item
|
|
// // attribute "InviteList" is between values 5 and 10
|
|
// condition := expression.Size(expression.Name("InviteList")).Between(expression.Value(5), expression.Value(10))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Size(expression.Name("InviteList")).Between(expression.Value(5), expression.Value(10))
|
|
// // Let :five and :ten be ExpressionAttributeValues representing the value
|
|
// // 5 and the value 10
|
|
// "size (InviteList) BETWEEN :five AND :ten"
|
|
func (sb SizeBuilder) Between(lower, upper OperandBuilder) ConditionBuilder {
|
|
return Between(sb, lower, upper)
|
|
}
|
|
|
|
// In returns a ConditionBuilder representing the result of the IN function
|
|
// in DynamoDB Condition Expressions. The resulting ConditionBuilder can be used
|
|
// as a part of other Condition Expressions or as an argument to the
|
|
// WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the value of the item
|
|
// // attribute "Color" is checked against the list of colors "red",
|
|
// // "green", and "blue".
|
|
// condition := expression.In(expression.Name("Color"), expression.Value("red"), expression.Value("green"), expression.Value("blue"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.In(expression.Name("Color"), expression.Value("red"), expression.Value("green"), expression.Value("blue"))
|
|
// // Let :red, :green, :blue be ExpressionAttributeValues representing the
|
|
// // values "red", "green", and "blue" respectively
|
|
// "Color IN (:red, :green, :blue)"
|
|
func In(left, right OperandBuilder, other ...OperandBuilder) ConditionBuilder {
|
|
other = append([]OperandBuilder{left, right}, other...)
|
|
return ConditionBuilder{
|
|
operandList: other,
|
|
mode: inCond,
|
|
}
|
|
}
|
|
|
|
// In returns a ConditionBuilder representing the result of the IN function
|
|
// in DynamoDB Condition Expressions. The resulting ConditionBuilder can be used
|
|
// as a part of other Condition Expressions or as an argument to the
|
|
// WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the value of the item
|
|
// // attribute "Color" is checked against the list of colors "red",
|
|
// // "green", and "blue".
|
|
// condition := expression.Name("Color").In(expression.Value("red"), expression.Value("green"), expression.Value("blue"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("Color").In(expression.Value("red"), expression.Value("green"), expression.Value("blue"))
|
|
// // Let :red, :green, :blue be ExpressionAttributeValues representing the
|
|
// // values "red", "green", and "blue" respectively
|
|
// "Color IN (:red, :green, :blue)"
|
|
func (nb NameBuilder) In(right OperandBuilder, other ...OperandBuilder) ConditionBuilder {
|
|
return In(nb, right, other...)
|
|
}
|
|
|
|
// In returns a ConditionBuilder representing the result of the IN function
|
|
// TODO change this one
|
|
// in DynamoDB Condition Expressions. The resulting ConditionBuilder can be used
|
|
// as a part of other Condition Expressions or as an argument to the
|
|
// WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the value "yellow" is checked
|
|
// // against the list of colors "red", "green", and "blue".
|
|
// condition := expression.Value("yellow").In(expression.Value("red"), expression.Value("green"), expression.Value("blue"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Value("yellow").In(expression.Value("red"), expression.Value("green"), expression.Value("blue"))
|
|
// // Let :yellow, :red, :green, :blue be ExpressionAttributeValues
|
|
// // representing the values "yellow", "red", "green", and "blue"
|
|
// // respectively
|
|
// ":yellow IN (:red, :green, :blue)"
|
|
func (vb ValueBuilder) In(right OperandBuilder, other ...OperandBuilder) ConditionBuilder {
|
|
return In(vb, right, other...)
|
|
}
|
|
|
|
// In returns a ConditionBuilder representing the result of the IN function
|
|
// in DynamoDB Condition Expressions. The resulting ConditionBuilder can be used
|
|
// as a part of other Condition Expressions or as an argument to the
|
|
// WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the condition where the size of the item
|
|
// // attribute "Donuts" is checked against the list of numbers 12, 24, and
|
|
// // 36.
|
|
// condition := expression.Size(expression.Name("Donuts")).In(expression.Value(12), expression.Value(24), expression.Value(36))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Size(expression.Name("Donuts")).In(expression.Value(12), expression.Value(24), expression.Value(36))
|
|
// // Let :dozen, :twoDozen, :threeDozen be ExpressionAttributeValues
|
|
// // representing the values 12, 24, and 36 respectively
|
|
// "size (Donuts) IN (12, 24, 36)"
|
|
func (sb SizeBuilder) In(right OperandBuilder, other ...OperandBuilder) ConditionBuilder {
|
|
return In(sb, right, other...)
|
|
}
|
|
|
|
// AttributeExists returns a ConditionBuilder representing the result of the
|
|
// attribute_exists function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "Age" exists or not
|
|
// condition := expression.AttributeExists(expression.Name("Age"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.AttributeExists(expression.Name("Age"))
|
|
// "attribute_exists (Age))"
|
|
func AttributeExists(nameBuilder NameBuilder) ConditionBuilder {
|
|
return ConditionBuilder{
|
|
operandList: []OperandBuilder{nameBuilder},
|
|
mode: attrExistsCond,
|
|
}
|
|
}
|
|
|
|
// AttributeExists returns a ConditionBuilder representing the result of the
|
|
// attribute_exists function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "Age" exists or not
|
|
// condition := expression.Name("Age").AttributeExists()
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("Age").AttributeExists()
|
|
// "attribute_exists (Age))"
|
|
func (nb NameBuilder) AttributeExists() ConditionBuilder {
|
|
return AttributeExists(nb)
|
|
}
|
|
|
|
// AttributeNotExists returns a ConditionBuilder representing the result of
|
|
// the attribute_not_exists function in DynamoDB Condition Expressions. The
|
|
// resulting ConditionBuilder can be used as a part of other Condition
|
|
// Expressions or as an argument to the WithCondition() method for the Builder
|
|
// struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "Age" exists or not
|
|
// condition := expression.AttributeNotExists(expression.Name("Age"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.AttributeNotExists(expression.Name("Age"))
|
|
// "attribute_not_exists (Age))"
|
|
func AttributeNotExists(nameBuilder NameBuilder) ConditionBuilder {
|
|
return ConditionBuilder{
|
|
operandList: []OperandBuilder{nameBuilder},
|
|
mode: attrNotExistsCond,
|
|
}
|
|
}
|
|
|
|
// AttributeNotExists returns a ConditionBuilder representing the result of
|
|
// the attribute_not_exists function in DynamoDB Condition Expressions. The
|
|
// resulting ConditionBuilder can be used as a part of other Condition
|
|
// Expressions or as an argument to the WithCondition() method for the Builder
|
|
// struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "Age" exists or not
|
|
// condition := expression.Name("Age").AttributeNotExists()
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("Age").AttributeNotExists()
|
|
// "attribute_not_exists (Age))"
|
|
func (nb NameBuilder) AttributeNotExists() ConditionBuilder {
|
|
return AttributeNotExists(nb)
|
|
}
|
|
|
|
// AttributeType returns a ConditionBuilder representing the result of the
|
|
// attribute_type function in DynamoDB Condition Expressions. The DynamoDB types
|
|
// are represented by the type DynamoDBAttributeType. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "Age" has the DynamoDB type Number or not
|
|
// condition := expression.AttributeType(expression.Name("Age"), expression.Number)
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.AttributeType(expression.Name("Age"), expression.Number)
|
|
// // Let :type be an ExpressionAttributeValue representing the value "N"
|
|
// "attribute_type (Age, :type)"
|
|
func AttributeType(nameBuilder NameBuilder, attributeType DynamoDBAttributeType) ConditionBuilder {
|
|
v := ValueBuilder{
|
|
value: string(attributeType),
|
|
}
|
|
return ConditionBuilder{
|
|
operandList: []OperandBuilder{nameBuilder, v},
|
|
mode: attrTypeCond,
|
|
}
|
|
}
|
|
|
|
// AttributeType returns a ConditionBuilder representing the result of the
|
|
// attribute_type function in DynamoDB Condition Expressions. The DynamoDB types
|
|
// are represented by the type DynamoDBAttributeType. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "Age" has the DynamoDB type Number or not
|
|
// condition := expression.Name("Age").AttributeType(expression.Number)
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("Age").AttributeType(expression.Number)
|
|
// // Let :type be an ExpressionAttributeValue representing the value "N"
|
|
// "attribute_type (Age, :type)"
|
|
func (nb NameBuilder) AttributeType(attributeType DynamoDBAttributeType) ConditionBuilder {
|
|
return AttributeType(nb, attributeType)
|
|
}
|
|
|
|
// BeginsWith returns a ConditionBuilder representing the result of the
|
|
// begins_with function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "CodeName" starts with the substring "Ben"
|
|
// condition := expression.BeginsWith(expression.Name("CodeName"), "Ben")
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.BeginsWith(expression.Name("CodeName"), "Ben")
|
|
// // Let :ben be an ExpressionAttributeValue representing the value "Ben"
|
|
// "begins_with (CodeName, :ben)"
|
|
func BeginsWith(nameBuilder NameBuilder, prefix string) ConditionBuilder {
|
|
v := ValueBuilder{
|
|
value: prefix,
|
|
}
|
|
return ConditionBuilder{
|
|
operandList: []OperandBuilder{nameBuilder, v},
|
|
mode: beginsWithCond,
|
|
}
|
|
}
|
|
|
|
// BeginsWith returns a ConditionBuilder representing the result of the
|
|
// begins_with function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "CodeName" starts with the substring "Ben"
|
|
// condition := expression.Name("CodeName").BeginsWith("Ben")
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("CodeName").BeginsWith("Ben")
|
|
// // Let :ben be an ExpressionAttributeValue representing the value "Ben"
|
|
// "begins_with (CodeName, :ben)"
|
|
func (nb NameBuilder) BeginsWith(prefix string) ConditionBuilder {
|
|
return BeginsWith(nb, prefix)
|
|
}
|
|
|
|
// Contains returns a ConditionBuilder representing the result of the
|
|
// contains function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "InviteList" has the value "Ben"
|
|
// condition := expression.Contains(expression.Name("InviteList"), expression.Value("Ben"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Contains(expression.Name("InviteList"), expression.Value("Ben"))
|
|
// // Let :ben be an ExpressionAttributeValue representing the value "Ben"
|
|
// "contains (InviteList, :ben)"
|
|
func Contains(nameBuilder NameBuilder, substr string) ConditionBuilder {
|
|
v := ValueBuilder{
|
|
value: substr,
|
|
}
|
|
return ConditionBuilder{
|
|
operandList: []OperandBuilder{nameBuilder, v},
|
|
mode: containsCond,
|
|
}
|
|
}
|
|
|
|
// Contains returns a ConditionBuilder representing the result of the
|
|
// contains function in DynamoDB Condition Expressions. The resulting
|
|
// ConditionBuilder can be used as a part of other Condition Expressions or as
|
|
// an argument to the WithCondition() method for the Builder struct.
|
|
//
|
|
// Example:
|
|
//
|
|
// // condition represents the boolean condition of whether the item
|
|
// // attribute "InviteList" has the value "Ben"
|
|
// condition := expression.Name("InviteList").Contains(expression.Value("Ben"))
|
|
//
|
|
// // Used in another Condition Expression
|
|
// anotherCondition := expression.Not(condition)
|
|
// // Used to make an Builder
|
|
// builder := expression.NewBuilder().WithCondition(condition)
|
|
//
|
|
// Expression Equivalent:
|
|
//
|
|
// expression.Name("InviteList").Contains(expression.Value("Ben"))
|
|
// // Let :ben be an ExpressionAttributeValue representing the value "Ben"
|
|
// "contains (InviteList, :ben)"
|
|
func (nb NameBuilder) Contains(substr string) ConditionBuilder {
|
|
return Contains(nb, substr)
|
|
}
|
|
|
|
// buildTree builds a tree structure of exprNodes based on the tree
|
|
// structure of the input ConditionBuilder's child ConditionBuilders and
|
|
// OperandBuilders. buildTree() satisfies the treeBuilder interface so
|
|
// ConditionBuilder can be a part of Builder and Expression struct.
|
|
func (cb ConditionBuilder) buildTree() (exprNode, error) {
|
|
childNodes, err := cb.buildChildNodes()
|
|
if err != nil {
|
|
return exprNode{}, err
|
|
}
|
|
ret := exprNode{
|
|
children: childNodes,
|
|
}
|
|
|
|
switch cb.mode {
|
|
case equalCond, notEqualCond, lessThanCond, lessThanEqualCond, greaterThanCond, greaterThanEqualCond:
|
|
return compareBuildCondition(cb.mode, ret)
|
|
case andCond, orCond:
|
|
return compoundBuildCondition(cb, ret)
|
|
case notCond:
|
|
return notBuildCondition(ret)
|
|
case betweenCond:
|
|
return betweenBuildCondition(ret)
|
|
case inCond:
|
|
return inBuildCondition(cb, ret)
|
|
case attrExistsCond:
|
|
return attrExistsBuildCondition(ret)
|
|
case attrNotExistsCond:
|
|
return attrNotExistsBuildCondition(ret)
|
|
case attrTypeCond:
|
|
return attrTypeBuildCondition(ret)
|
|
case beginsWithCond:
|
|
return beginsWithBuildCondition(ret)
|
|
case containsCond:
|
|
return containsBuildCondition(ret)
|
|
case unsetCond:
|
|
return exprNode{}, newUnsetParameterError("buildTree", "ConditionBuilder")
|
|
default:
|
|
return exprNode{}, fmt.Errorf("build condition error: unsupported mode: %v", cb.mode)
|
|
}
|
|
}
|
|
|
|
// compareBuildCondition is the function to make exprNodes from Compare
|
|
// ConditionBuilders. compareBuildCondition is only called by the
|
|
// buildTree method. This function assumes that the argument ConditionBuilder
|
|
// has the right format.
|
|
func compareBuildCondition(conditionMode conditionMode, node exprNode) (exprNode, error) {
|
|
// Create a string with special characters that can be substituted later: $c
|
|
switch conditionMode {
|
|
case equalCond:
|
|
node.fmtExpr = "$c = $c"
|
|
case notEqualCond:
|
|
node.fmtExpr = "$c <> $c"
|
|
case lessThanCond:
|
|
node.fmtExpr = "$c < $c"
|
|
case lessThanEqualCond:
|
|
node.fmtExpr = "$c <= $c"
|
|
case greaterThanCond:
|
|
node.fmtExpr = "$c > $c"
|
|
case greaterThanEqualCond:
|
|
node.fmtExpr = "$c >= $c"
|
|
default:
|
|
return exprNode{}, fmt.Errorf("build compare condition error: unsupported mode: %v", conditionMode)
|
|
}
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// compoundBuildCondition is the function to make exprNodes from And/Or
|
|
// ConditionBuilders. compoundBuildCondition is only called by the
|
|
// buildTree method. This function assumes that the argument ConditionBuilder
|
|
// has the right format.
|
|
func compoundBuildCondition(conditionBuilder ConditionBuilder, node exprNode) (exprNode, error) {
|
|
// create a string with escaped characters to substitute them with proper
|
|
// aliases during runtime
|
|
var mode string
|
|
switch conditionBuilder.mode {
|
|
case andCond:
|
|
mode = " AND "
|
|
case orCond:
|
|
mode = " OR "
|
|
default:
|
|
return exprNode{}, fmt.Errorf("build compound condition error: unsupported mode: %v", conditionBuilder.mode)
|
|
}
|
|
node.fmtExpr = "($c)" + strings.Repeat(mode+"($c)", len(conditionBuilder.conditionList)-1)
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// notBuildCondition is the function to make exprNodes from Not
|
|
// ConditionBuilders. notBuildCondition is only called by the
|
|
// buildTree method. This function assumes that the argument ConditionBuilder
|
|
// has the right format.
|
|
func notBuildCondition(node exprNode) (exprNode, error) {
|
|
// create a string with escaped characters to substitute them with proper
|
|
// aliases during runtime
|
|
node.fmtExpr = "NOT ($c)"
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// betweenBuildCondition is the function to make exprNodes from Between
|
|
// ConditionBuilders. BuildCondition is only called by the
|
|
// buildTree method. This function assumes that the argument ConditionBuilder
|
|
// has the right format.
|
|
func betweenBuildCondition(node exprNode) (exprNode, error) {
|
|
// Create a string with special characters that can be substituted later: $c
|
|
node.fmtExpr = "$c BETWEEN $c AND $c"
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// inBuildCondition is the function to make exprNodes from In
|
|
// ConditionBuilders. inBuildCondition is only called by the
|
|
// buildTree method. This function assumes that the argument ConditionBuilder
|
|
// has the right format.
|
|
func inBuildCondition(conditionBuilder ConditionBuilder, node exprNode) (exprNode, error) {
|
|
// Create a string with special characters that can be substituted later: $c
|
|
node.fmtExpr = "$c IN ($c" + strings.Repeat(", $c", len(conditionBuilder.operandList)-2) + ")"
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// attrExistsBuildCondition is the function to make exprNodes from
|
|
// AttrExistsCond ConditionBuilders. attrExistsBuildCondition is only
|
|
// called by the buildTree method. This function assumes that the argument
|
|
// ConditionBuilder has the right format.
|
|
func attrExistsBuildCondition(node exprNode) (exprNode, error) {
|
|
// Create a string with special characters that can be substituted later: $c
|
|
node.fmtExpr = "attribute_exists ($c)"
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// attrNotExistsBuildCondition is the function to make exprNodes from
|
|
// AttrNotExistsCond ConditionBuilders. attrNotExistsBuildCondition is only
|
|
// called by the buildTree method. This function assumes that the argument
|
|
// ConditionBuilder has the right format.
|
|
func attrNotExistsBuildCondition(node exprNode) (exprNode, error) {
|
|
// Create a string with special characters that can be substituted later: $c
|
|
node.fmtExpr = "attribute_not_exists ($c)"
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// attrTypeBuildCondition is the function to make exprNodes from AttrTypeCond
|
|
// ConditionBuilders. attrTypeBuildCondition is only called by the
|
|
// buildTree method. This function assumes that the argument
|
|
// ConditionBuilder has the right format.
|
|
func attrTypeBuildCondition(node exprNode) (exprNode, error) {
|
|
// Create a string with special characters that can be substituted later: $c
|
|
node.fmtExpr = "attribute_type ($c, $c)"
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// beginsWithBuildCondition is the function to make exprNodes from
|
|
// BeginsWithCond ConditionBuilders. beginsWithBuildCondition is only
|
|
// called by the buildTree method. This function assumes that the argument
|
|
// ConditionBuilder has the right format.
|
|
func beginsWithBuildCondition(node exprNode) (exprNode, error) {
|
|
// Create a string with special characters that can be substituted later: $c
|
|
node.fmtExpr = "begins_with ($c, $c)"
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// containsBuildCondition is the function to make exprNodes from
|
|
// ContainsCond ConditionBuilders. containsBuildCondition is only
|
|
// called by the buildTree method. This function assumes that the argument
|
|
// ConditionBuilder has the right format.
|
|
func containsBuildCondition(node exprNode) (exprNode, error) {
|
|
// Create a string with special characters that can be substituted later: $c
|
|
node.fmtExpr = "contains ($c, $c)"
|
|
|
|
return node, nil
|
|
}
|
|
|
|
// buildChildNodes creates the list of the child exprNodes. This avoids
|
|
// duplication of code amongst the various buildTree functions.
|
|
func (cb ConditionBuilder) buildChildNodes() ([]exprNode, error) {
|
|
childNodes := make([]exprNode, 0, len(cb.conditionList)+len(cb.operandList))
|
|
for _, condition := range cb.conditionList {
|
|
node, err := condition.buildTree()
|
|
if err != nil {
|
|
return []exprNode{}, err
|
|
}
|
|
childNodes = append(childNodes, node)
|
|
}
|
|
for _, ope := range cb.operandList {
|
|
operand, err := ope.BuildOperand()
|
|
if err != nil {
|
|
return []exprNode{}, err
|
|
}
|
|
childNodes = append(childNodes, operand.exprNode)
|
|
}
|
|
|
|
return childNodes, nil
|
|
}
|