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/*
* Copyright 2011-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with
* the License. A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*/
package com.amazonaws.services.dynamodbv2.model;
import java.io.Serializable;
/**
*
* Represents a condition to be compared with an attribute value. This condition can be used with DeleteItem,
* PutItem or UpdateItem operations; if the comparison evaluates to true, the operation succeeds; if not,
* the operation fails. You can use ExpectedAttributeValue in one of two different ways:
*
*
* -
*
* Use AttributeValueList to specify one or more values to compare against an attribute. Use
* ComparisonOperator to specify how you want to perform the comparison. If the comparison evaluates to true,
* then the conditional operation succeeds.
*
*
* -
*
* Use Value to specify a value that DynamoDB will compare against an attribute. If the values match, then
* ExpectedAttributeValue evaluates to true and the conditional operation succeeds. Optionally, you can also set
* Exists to false, indicating that you do not expect to find the attribute value in the table. In this
* case, the conditional operation succeeds only if the comparison evaluates to false.
*
*
*
*
* Value and Exists are incompatible with AttributeValueList and ComparisonOperator. Note
* that if you use both sets of parameters at once, DynamoDB will return a ValidationException exception.
*
*/
public class ExpectedAttributeValue implements Serializable, Cloneable {
private AttributeValue value;
/**
*
* Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists in the
* table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the table. If
* in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value is found,
* despite the assumption that it does not exist, the operation fails with a ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself, DynamoDB
* assumes the attribute exists: You don't have to set Exists to true, because it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist, but don't
* specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute to have
* a value, while also expecting it not to exist.)
*
*
*
*/
private Boolean exists;
/**
*
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than, less
* than, etc.
*
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set,
* Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set
* type). If an item contains an AttributeValue element of a different type than the one provided in the
* request, the value does not match. For example, {"S":"6"} does not equal {"N":"6"}.
* Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean true.
* This result is because the attribute "a" exists; its data type is not relevant to the
* NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NULL, the result is a Boolean false. This
* is because the attribute "a" exists; its data type is not relevant to the NULL
* comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a
* substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
* subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
* SS", "NS", or "BS"), then the operator evaluates to true if it finds an
* exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence
* of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the
* absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set
* ("SS", "NS", or "BS"), then the operator evaluates to true if it does
* not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a
* set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number, or
* Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any
* elements of the input set are present in the item attribute, the expression evaluates to true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to,
* the first element and less than, or equal to, the second element. If an item contains an AttributeValue
* element of a different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not compare to {"N":"6"}. Also, {"N":"6"} does not compare
* to {"NS":["6", "2", "1"]}
*
*
*
*/
private String comparisonOperator;
/**
*
* One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
* ComparisonOperator being used.
*
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
* example, a is greater than A, and a is greater than B. For a
* list of code values, see http://en.wikipedia
* .org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data Format in
* the Amazon DynamoDB Developer Guide.
*
*/
private java.util.List attributeValueList;
/**
* Default constructor for ExpectedAttributeValue object. Callers should use the setter or fluent setter (with...)
* methods to initialize the object after creating it.
*/
public ExpectedAttributeValue() {
}
/**
* Constructs a new ExpectedAttributeValue object. Callers should use the setter or fluent setter (with...) methods
* to initialize any additional object members.
*
* @param value
*/
public ExpectedAttributeValue(AttributeValue value) {
setValue(value);
}
/**
* Constructs a new ExpectedAttributeValue object. Callers should use the setter or fluent setter (with...) methods
* to initialize any additional object members.
*
* @param exists
* Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists
* in the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the
* table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If
* the value is found, despite the assumption that it does not exist, the operation fails with a
* ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself,
* DynamoDB assumes the attribute exists: You don't have to set Exists to true, because
* it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist,
* but don't specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute
* to have a value, while also expecting it not to exist.)
*
*
*/
public ExpectedAttributeValue(Boolean exists) {
setExists(exists);
}
/**
* @param value
*/
public void setValue(AttributeValue value) {
this.value = value;
}
/**
* @return
*/
public AttributeValue getValue() {
return this.value;
}
/**
* @param value
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ExpectedAttributeValue withValue(AttributeValue value) {
setValue(value);
return this;
}
/**
*
* Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists in the
* table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the table. If
* in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value is found,
* despite the assumption that it does not exist, the operation fails with a ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself, DynamoDB
* assumes the attribute exists: You don't have to set Exists to true, because it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist, but don't
* specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute to have
* a value, while also expecting it not to exist.)
*
*
*
*
* @param exists
* Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists
* in the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the
* table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If
* the value is found, despite the assumption that it does not exist, the operation fails with a
* ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself,
* DynamoDB assumes the attribute exists: You don't have to set Exists to true, because
* it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist,
* but don't specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute
* to have a value, while also expecting it not to exist.)
*
*
*/
public void setExists(Boolean exists) {
this.exists = exists;
}
/**
*
* Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists in the
* table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the table. If
* in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value is found,
* despite the assumption that it does not exist, the operation fails with a ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself, DynamoDB
* assumes the attribute exists: You don't have to set Exists to true, because it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist, but don't
* specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute to have
* a value, while also expecting it not to exist.)
*
*
*
*
* @return Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists
* in the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the
* table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If
* the value is found, despite the assumption that it does not exist, the operation fails with a
* ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself,
* DynamoDB assumes the attribute exists: You don't have to set Exists to true, because
* it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist,
* but don't specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute
* to have a value, while also expecting it not to exist.)
*
*
*/
public Boolean getExists() {
return this.exists;
}
/**
*
* Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists in the
* table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the table. If
* in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value is found,
* despite the assumption that it does not exist, the operation fails with a ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself, DynamoDB
* assumes the attribute exists: You don't have to set Exists to true, because it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist, but don't
* specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute to have
* a value, while also expecting it not to exist.)
*
*
*
*
* @param exists
* Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists
* in the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the
* table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If
* the value is found, despite the assumption that it does not exist, the operation fails with a
* ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself,
* DynamoDB assumes the attribute exists: You don't have to set Exists to true, because
* it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist,
* but don't specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute
* to have a value, while also expecting it not to exist.)
*
*
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ExpectedAttributeValue withExists(Boolean exists) {
setExists(exists);
return this;
}
/**
*
* Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists in the
* table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the table. If
* in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value is found,
* despite the assumption that it does not exist, the operation fails with a ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself, DynamoDB
* assumes the attribute exists: You don't have to set Exists to true, because it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist, but don't
* specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute to have
* a value, while also expecting it not to exist.)
*
*
*
*
* @return Causes DynamoDB to evaluate the value before attempting a conditional operation:
*
* -
*
* If Exists is true, DynamoDB will check to see if that attribute value already exists
* in the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
* ConditionalCheckFailedException.
*
*
* -
*
* If Exists is false, DynamoDB assumes that the attribute value does not exist in the
* table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If
* the value is found, despite the assumption that it does not exist, the operation fails with a
* ConditionalCheckFailedException.
*
*
*
*
* The default setting for Exists is true. If you supply a Value all by itself,
* DynamoDB assumes the attribute exists: You don't have to set Exists to true, because
* it is implied.
*
*
* DynamoDB returns a ValidationException if:
*
*
* -
*
* Exists is true but there is no Value to check. (You expect a value to exist,
* but don't specify what that value is.)
*
*
* -
*
* Exists is false but you also provide a Value. (You cannot expect an attribute
* to have a value, while also expecting it not to exist.)
*
*
*/
public Boolean isExists() {
return this.exists;
}
/**
*
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than, less
* than, etc.
*
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set,
* Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set
* type). If an item contains an AttributeValue element of a different type than the one provided in the
* request, the value does not match. For example, {"S":"6"} does not equal {"N":"6"}.
* Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean true.
* This result is because the attribute "a" exists; its data type is not relevant to the
* NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NULL, the result is a Boolean false. This
* is because the attribute "a" exists; its data type is not relevant to the NULL
* comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a
* substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
* subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
* SS", "NS", or "BS"), then the operator evaluates to true if it finds an
* exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence
* of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the
* absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set
* ("SS", "NS", or "BS"), then the operator evaluates to true if it does
* not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a
* set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number, or
* Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any
* elements of the input set are present in the item attribute, the expression evaluates to true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to,
* the first element and less than, or equal to, the second element. If an item contains an AttributeValue
* element of a different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not compare to {"N":"6"}. Also, {"N":"6"} does not compare
* to {"NS":["6", "2", "1"]}
*
*
*
*
* @param comparisonOperator
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater
* than, less than, etc.
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number,
* Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
* different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does
* not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one
* provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
* true. This result is because the attribute "a" exists; its data type is not relevant
* to the NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute
* "a" is null, and you evaluate it using NULL, the result is a Boolean
* false. This is because the attribute "a" exists; its data type is not relevant to the
* NULL comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is of type String, then the operator
* checks for a substring match. If the target attribute of the comparison is of type Binary, then the
* operator looks for a subsequence of the target that matches the input. If the target attribute of the
* comparison is a set ("SS", "NS", or "BS"), then the operator
* evaluates to true if it finds an exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks
* for the absence of a substring match. If the target attribute of the comparison is Binary, then the
* operator checks for the absence of a subsequence of the target that matches the input. If the target
* attribute of the comparison is a set ("SS", "NS", or "BS"), then
* the operator evaluates to true if it does not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a
* Number or a set type). The target attribute of the comparison must be of type String or Binary (not a
* Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number,
* or Binary (not a set type). These attributes are compared against an existing set type attribute of an
* item. If any elements of the input set are present in the item attribute, the expression evaluates to
* true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second
* value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
* equal to, the first element and less than, or equal to, the second element. If an item contains an
* AttributeValue element of a different type than the one provided in the request, the value does not
* match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
* {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
*
*
* @see ComparisonOperator
*/
public void setComparisonOperator(String comparisonOperator) {
this.comparisonOperator = comparisonOperator;
}
/**
*
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than, less
* than, etc.
*
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set,
* Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set
* type). If an item contains an AttributeValue element of a different type than the one provided in the
* request, the value does not match. For example, {"S":"6"} does not equal {"N":"6"}.
* Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean true.
* This result is because the attribute "a" exists; its data type is not relevant to the
* NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NULL, the result is a Boolean false. This
* is because the attribute "a" exists; its data type is not relevant to the NULL
* comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a
* substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
* subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
* SS", "NS", or "BS"), then the operator evaluates to true if it finds an
* exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence
* of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the
* absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set
* ("SS", "NS", or "BS"), then the operator evaluates to true if it does
* not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a
* set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number, or
* Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any
* elements of the input set are present in the item attribute, the expression evaluates to true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to,
* the first element and less than, or equal to, the second element. If an item contains an AttributeValue
* element of a different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not compare to {"N":"6"}. Also, {"N":"6"} does not compare
* to {"NS":["6", "2", "1"]}
*
*
*
*
* @return A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater
* than, less than, etc.
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number,
* Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
* different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does
* not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than
* the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one
* provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than
* the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than
* the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
* true. This result is because the attribute "a" exists; its data type is not relevant
* to the NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of
* attribute "a" is null, and you evaluate it using NULL, the result is a Boolean
* false. This is because the attribute "a" exists; its data type is not relevant to the
* NULL comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is of type String, then the operator
* checks for a substring match. If the target attribute of the comparison is of type Binary, then the
* operator looks for a subsequence of the target that matches the input. If the target attribute of the
* comparison is a set ("SS", "NS", or "BS"), then the operator
* evaluates to true if it finds an exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks
* for the absence of a substring match. If the target attribute of the comparison is Binary, then the
* operator checks for the absence of a subsequence of the target that matches the input. If the target
* attribute of the comparison is a set ("SS", "NS", or "BS"), then
* the operator evaluates to true if it does not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a
* Number or a set type). The target attribute of the comparison must be of type String or Binary (not a
* Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number,
* or Binary (not a set type). These attributes are compared against an existing set type attribute of an
* item. If any elements of the input set are present in the item attribute, the expression evaluates to
* true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second
* value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either
* String, Number, or Binary (not a set type). A target attribute matches if the target value is greater
* than, or equal to, the first element and less than, or equal to, the second element. If an item contains
* an AttributeValue element of a different type than the one provided in the request, the value does
* not match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
* {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
*
*
* @see ComparisonOperator
*/
public String getComparisonOperator() {
return this.comparisonOperator;
}
/**
*
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than, less
* than, etc.
*
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set,
* Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set
* type). If an item contains an AttributeValue element of a different type than the one provided in the
* request, the value does not match. For example, {"S":"6"} does not equal {"N":"6"}.
* Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean true.
* This result is because the attribute "a" exists; its data type is not relevant to the
* NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NULL, the result is a Boolean false. This
* is because the attribute "a" exists; its data type is not relevant to the NULL
* comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a
* substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
* subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
* SS", "NS", or "BS"), then the operator evaluates to true if it finds an
* exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence
* of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the
* absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set
* ("SS", "NS", or "BS"), then the operator evaluates to true if it does
* not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a
* set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number, or
* Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any
* elements of the input set are present in the item attribute, the expression evaluates to true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to,
* the first element and less than, or equal to, the second element. If an item contains an AttributeValue
* element of a different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not compare to {"N":"6"}. Also, {"N":"6"} does not compare
* to {"NS":["6", "2", "1"]}
*
*
*
*
* @param comparisonOperator
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater
* than, less than, etc.
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number,
* Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
* different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does
* not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one
* provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
* true. This result is because the attribute "a" exists; its data type is not relevant
* to the NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute
* "a" is null, and you evaluate it using NULL, the result is a Boolean
* false. This is because the attribute "a" exists; its data type is not relevant to the
* NULL comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is of type String, then the operator
* checks for a substring match. If the target attribute of the comparison is of type Binary, then the
* operator looks for a subsequence of the target that matches the input. If the target attribute of the
* comparison is a set ("SS", "NS", or "BS"), then the operator
* evaluates to true if it finds an exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks
* for the absence of a substring match. If the target attribute of the comparison is Binary, then the
* operator checks for the absence of a subsequence of the target that matches the input. If the target
* attribute of the comparison is a set ("SS", "NS", or "BS"), then
* the operator evaluates to true if it does not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a
* Number or a set type). The target attribute of the comparison must be of type String or Binary (not a
* Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number,
* or Binary (not a set type). These attributes are compared against an existing set type attribute of an
* item. If any elements of the input set are present in the item attribute, the expression evaluates to
* true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second
* value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
* equal to, the first element and less than, or equal to, the second element. If an item contains an
* AttributeValue element of a different type than the one provided in the request, the value does not
* match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
* {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
*
*
* @return Returns a reference to this object so that method calls can be chained together.
* @see ComparisonOperator
*/
public ExpectedAttributeValue withComparisonOperator(String comparisonOperator) {
setComparisonOperator(comparisonOperator);
return this;
}
/**
*
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than, less
* than, etc.
*
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set,
* Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set
* type). If an item contains an AttributeValue element of a different type than the one provided in the
* request, the value does not match. For example, {"S":"6"} does not equal {"N":"6"}.
* Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean true.
* This result is because the attribute "a" exists; its data type is not relevant to the
* NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NULL, the result is a Boolean false. This
* is because the attribute "a" exists; its data type is not relevant to the NULL
* comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a
* substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
* subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
* SS", "NS", or "BS"), then the operator evaluates to true if it finds an
* exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence
* of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the
* absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set
* ("SS", "NS", or "BS"), then the operator evaluates to true if it does
* not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a
* set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number, or
* Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any
* elements of the input set are present in the item attribute, the expression evaluates to true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to,
* the first element and less than, or equal to, the second element. If an item contains an AttributeValue
* element of a different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not compare to {"N":"6"}. Also, {"N":"6"} does not compare
* to {"NS":["6", "2", "1"]}
*
*
*
*
* @param comparisonOperator
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater
* than, less than, etc.
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number,
* Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
* different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does
* not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one
* provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
* true. This result is because the attribute "a" exists; its data type is not relevant
* to the NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute
* "a" is null, and you evaluate it using NULL, the result is a Boolean
* false. This is because the attribute "a" exists; its data type is not relevant to the
* NULL comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is of type String, then the operator
* checks for a substring match. If the target attribute of the comparison is of type Binary, then the
* operator looks for a subsequence of the target that matches the input. If the target attribute of the
* comparison is a set ("SS", "NS", or "BS"), then the operator
* evaluates to true if it finds an exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks
* for the absence of a substring match. If the target attribute of the comparison is Binary, then the
* operator checks for the absence of a subsequence of the target that matches the input. If the target
* attribute of the comparison is a set ("SS", "NS", or "BS"), then
* the operator evaluates to true if it does not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a
* Number or a set type). The target attribute of the comparison must be of type String or Binary (not a
* Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number,
* or Binary (not a set type). These attributes are compared against an existing set type attribute of an
* item. If any elements of the input set are present in the item attribute, the expression evaluates to
* true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second
* value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
* equal to, the first element and less than, or equal to, the second element. If an item contains an
* AttributeValue element of a different type than the one provided in the request, the value does not
* match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
* {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
*
*
* @see ComparisonOperator
*/
public void setComparisonOperator(ComparisonOperator comparisonOperator) {
this.comparisonOperator = comparisonOperator.toString();
}
/**
*
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than, less
* than, etc.
*
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does not
* equal {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary, String Set,
* Number Set, or Binary Set. If an item contains an AttributeValue of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not equal {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary (not a set
* type). If an item contains an AttributeValue element of a different type than the one provided in the
* request, the value does not match. For example, {"S":"6"} does not equal {"N":"6"}.
* Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one provided
* in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean true.
* This result is because the attribute "a" exists; its data type is not relevant to the
* NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes, including
* lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NULL, the result is a Boolean false. This
* is because the attribute "a" exists; its data type is not relevant to the NULL
* comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is of type String, then the operator checks for a
* substring match. If the target attribute of the comparison is of type Binary, then the operator looks for a
* subsequence of the target that matches the input. If the target attribute of the comparison is a set ("
* SS", "NS", or "BS"), then the operator evaluates to true if it finds an
* exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or Binary
* (not a set type). If the target attribute of the comparison is a String, then the operator checks for the absence
* of a substring match. If the target attribute of the comparison is Binary, then the operator checks for the
* absence of a subsequence of the target that matches the input. If the target attribute of the comparison is a set
* ("SS", "NS", or "BS"), then the operator evaluates to true if it does
* not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a Number or a
* set type). The target attribute of the comparison must be of type String or Binary (not a Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number, or
* Binary (not a set type). These attributes are compared against an existing set type attribute of an item. If any
* elements of the input set are present in the item attribute, the expression evaluates to true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or equal to,
* the first element and less than, or equal to, the second element. If an item contains an AttributeValue
* element of a different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not compare to {"N":"6"}. Also, {"N":"6"} does not compare
* to {"NS":["6", "2", "1"]}
*
*
*
*
* @param comparisonOperator
* A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater
* than, less than, etc.
*
* The following comparison operators are available:
*
*
* EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
*
*
* The following are descriptions of each comparison operator.
*
*
* -
*
* EQ : Equal. EQ is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number,
* Binary, String Set, Number Set, or Binary Set. If an item contains an AttributeValue element of a
* different type than the one provided in the request, the value does not match. For example,
* {"S":"6"} does not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NE : Not equal. NE is supported for all datatypes, including lists and maps.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, Binary,
* String Set, Number Set, or Binary Set. If an item contains an AttributeValue of a different type
* than the one provided in the request, the value does not match. For example, {"S":"6"} does
* not equal {"N":"6"}. Also, {"N":"6"} does not equal
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LE : Less than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* LT : Less than.
*
*
* AttributeValueList can contain only one AttributeValue of type String, Number, or Binary
* (not a set type). If an item contains an AttributeValue element of a different type than the one
* provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GE : Greater than or equal.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* GT : Greater than.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If an item contains an AttributeValue element of a different type than the
* one provided in the request, the value does not match. For example, {"S":"6"} does not equal
* {"N":"6"}. Also, {"N":"6"} does not compare to
* {"NS":["6", "2", "1"]}.
*
*
* -
*
* NOT_NULL : The attribute exists. NOT_NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the existence of an attribute, not its data type. If the data type of attribute "
* a" is null, and you evaluate it using NOT_NULL, the result is a Boolean
* true. This result is because the attribute "a" exists; its data type is not relevant
* to the NOT_NULL comparison operator.
*
*
* -
*
* NULL : The attribute does not exist. NULL is supported for all datatypes,
* including lists and maps.
*
*
*
* This operator tests for the nonexistence of an attribute, not its data type. If the data type of attribute
* "a" is null, and you evaluate it using NULL, the result is a Boolean
* false. This is because the attribute "a" exists; its data type is not relevant to the
* NULL comparison operator.
*
*
* -
*
* CONTAINS : Checks for a subsequence, or value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is of type String, then the operator
* checks for a substring match. If the target attribute of the comparison is of type Binary, then the
* operator looks for a subsequence of the target that matches the input. If the target attribute of the
* comparison is a set ("SS", "NS", or "BS"), then the operator
* evaluates to true if it finds an exact match with any member of the set.
*
*
* CONTAINS is supported for lists: When evaluating "a CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* NOT_CONTAINS : Checks for absence of a subsequence, or absence of a value in a set.
*
*
* AttributeValueList can contain only one AttributeValue element of type String, Number, or
* Binary (not a set type). If the target attribute of the comparison is a String, then the operator checks
* for the absence of a substring match. If the target attribute of the comparison is Binary, then the
* operator checks for the absence of a subsequence of the target that matches the input. If the target
* attribute of the comparison is a set ("SS", "NS", or "BS"), then
* the operator evaluates to true if it does not find an exact match with any member of the set.
*
*
* NOT_CONTAINS is supported for lists: When evaluating "a NOT CONTAINS b", "a
* " can be a list; however, "b" cannot be a set, a map, or a list.
*
*
* -
*
* BEGINS_WITH : Checks for a prefix.
*
*
* AttributeValueList can contain only one AttributeValue of type String or Binary (not a
* Number or a set type). The target attribute of the comparison must be of type String or Binary (not a
* Number or a set type).
*
*
* -
*
* IN : Checks for matching elements within two sets.
*
*
* AttributeValueList can contain one or more AttributeValue elements of type String, Number,
* or Binary (not a set type). These attributes are compared against an existing set type attribute of an
* item. If any elements of the input set are present in the item attribute, the expression evaluates to
* true.
*
*
* -
*
* BETWEEN : Greater than or equal to the first value, and less than or equal to the second
* value.
*
*
* AttributeValueList must contain two AttributeValue elements of the same type, either String,
* Number, or Binary (not a set type). A target attribute matches if the target value is greater than, or
* equal to, the first element and less than, or equal to, the second element. If an item contains an
* AttributeValue element of a different type than the one provided in the request, the value does not
* match. For example, {"S":"6"} does not compare to {"N":"6"}. Also,
* {"N":"6"} does not compare to {"NS":["6", "2", "1"]}
*
*
* @return Returns a reference to this object so that method calls can be chained together.
* @see ComparisonOperator
*/
public ExpectedAttributeValue withComparisonOperator(ComparisonOperator comparisonOperator) {
setComparisonOperator(comparisonOperator);
return this;
}
/**
*
* One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
* ComparisonOperator being used.
*
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
* example, a is greater than A, and a is greater than B. For a
* list of code values, see http://en.wikipedia
* .org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data Format in
* the Amazon DynamoDB Developer Guide.
*
*
* @return One or more values to evaluate against the supplied attribute. The number of values in the list depends
* on the ComparisonOperator being used.
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values.
* For example, a is greater than A, and a is greater than
* B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data
* Format in the Amazon DynamoDB Developer Guide.
*/
public java.util.List getAttributeValueList() {
return attributeValueList;
}
/**
*
* One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
* ComparisonOperator being used.
*
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
* example, a is greater than A, and a is greater than B. For a
* list of code values, see http://en.wikipedia
* .org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data Format in
* the Amazon DynamoDB Developer Guide.
*
*
* @param attributeValueList
* One or more values to evaluate against the supplied attribute. The number of values in the list depends on
* the ComparisonOperator being used.
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values.
* For example, a is greater than A, and a is greater than
* B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data
* Format in the Amazon DynamoDB Developer Guide.
*/
public void setAttributeValueList(java.util.Collection attributeValueList) {
if (attributeValueList == null) {
this.attributeValueList = null;
return;
}
this.attributeValueList = new java.util.ArrayList(attributeValueList);
}
/**
*
* One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
* ComparisonOperator being used.
*
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
* example, a is greater than A, and a is greater than B. For a
* list of code values, see http://en.wikipedia
* .org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data Format in
* the Amazon DynamoDB Developer Guide.
*
*
* NOTE: This method appends the values to the existing list (if any). Use
* {@link #setAttributeValueList(java.util.Collection)} or {@link #withAttributeValueList(java.util.Collection)} if
* you want to override the existing values.
*
*
* @param attributeValueList
* One or more values to evaluate against the supplied attribute. The number of values in the list depends on
* the ComparisonOperator being used.
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values.
* For example, a is greater than A, and a is greater than
* B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data
* Format in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ExpectedAttributeValue withAttributeValueList(AttributeValue... attributeValueList) {
if (this.attributeValueList == null) {
setAttributeValueList(new java.util.ArrayList(attributeValueList.length));
}
for (AttributeValue ele : attributeValueList) {
this.attributeValueList.add(ele);
}
return this;
}
/**
*
* One or more values to evaluate against the supplied attribute. The number of values in the list depends on the
* ComparisonOperator being used.
*
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values. For
* example, a is greater than A, and a is greater than B. For a
* list of code values, see http://en.wikipedia
* .org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data Format in
* the Amazon DynamoDB Developer Guide.
*
*
* @param attributeValueList
* One or more values to evaluate against the supplied attribute. The number of values in the list depends on
* the ComparisonOperator being used.
*
* For type Number, value comparisons are numeric.
*
*
* String value comparisons for greater than, equals, or less than are based on ASCII character code values.
* For example, a is greater than A, and a is greater than
* B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
*
*
* For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
*
*
* For information on specifying data types in JSON, see JSON Data
* Format in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ExpectedAttributeValue withAttributeValueList(java.util.Collection attributeValueList) {
setAttributeValueList(attributeValueList);
return this;
}
/**
* Returns a string representation of this object; useful for testing and debugging.
*
* @return A string representation of this object.
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("{");
if (getValue() != null)
sb.append("Value: " + getValue() + ",");
if (getExists() != null)
sb.append("Exists: " + getExists() + ",");
if (getComparisonOperator() != null)
sb.append("ComparisonOperator: " + getComparisonOperator() + ",");
if (getAttributeValueList() != null)
sb.append("AttributeValueList: " + getAttributeValueList());
sb.append("}");
return sb.toString();
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (obj instanceof ExpectedAttributeValue == false)
return false;
ExpectedAttributeValue other = (ExpectedAttributeValue) obj;
if (other.getValue() == null ^ this.getValue() == null)
return false;
if (other.getValue() != null && other.getValue().equals(this.getValue()) == false)
return false;
if (other.getExists() == null ^ this.getExists() == null)
return false;
if (other.getExists() != null && other.getExists().equals(this.getExists()) == false)
return false;
if (other.getComparisonOperator() == null ^ this.getComparisonOperator() == null)
return false;
if (other.getComparisonOperator() != null && other.getComparisonOperator().equals(this.getComparisonOperator()) == false)
return false;
if (other.getAttributeValueList() == null ^ this.getAttributeValueList() == null)
return false;
if (other.getAttributeValueList() != null && other.getAttributeValueList().equals(this.getAttributeValueList()) == false)
return false;
return true;
}
@Override
public int hashCode() {
final int prime = 31;
int hashCode = 1;
hashCode = prime * hashCode + ((getValue() == null) ? 0 : getValue().hashCode());
hashCode = prime * hashCode + ((getExists() == null) ? 0 : getExists().hashCode());
hashCode = prime * hashCode + ((getComparisonOperator() == null) ? 0 : getComparisonOperator().hashCode());
hashCode = prime * hashCode + ((getAttributeValueList() == null) ? 0 : getAttributeValueList().hashCode());
return hashCode;
}
@Override
public ExpectedAttributeValue clone() {
try {
return (ExpectedAttributeValue) super.clone();
} catch (CloneNotSupportedException e) {
throw new IllegalStateException("Got a CloneNotSupportedException from Object.clone() " + "even though we're Cloneable!", e);
}
}
}