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/*
* Copyright 2010-2016 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 the selection criteria for a Query or Scan
* operation:
*
*
* -
*
* For a Query operation, Condition is used for specifying the
* KeyConditions to use when querying a table or an index. For
* KeyConditions, only the following comparison operators are supported:
*
*
* EQ | LE | LT | GE | GT | BEGINS_WITH | BETWEEN
*
*
* Condition is also used in a QueryFilter, which evaluates the
* query results and returns only the desired values.
*
*
* -
*
* For a Scan operation, Condition is used in a ScanFilter,
* which evaluates the scan results and returns only the desired values.
*
*
*
*/
public class Condition implements Serializable, Cloneable {
/**
*
* 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.
*
*/
private java.util.List attributeValueList;
/**
*
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer
* Guide.
*
*/
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.
*
*
* @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.
*/
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.
*
*
* @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.
*/
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.
*
*
* 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.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public Condition 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.
*
*
* @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.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public Condition withAttributeValueList(
java.util.Collection attributeValueList) {
setAttributeValueList(attributeValueList);
return this;
}
/**
*
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer
* Guide.
*
*
* @param comparisonOperator
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB
* Developer Guide.
* @see ComparisonOperator
*/
public void setComparisonOperator(String comparisonOperator) {
this.comparisonOperator = comparisonOperator;
}
/**
*
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer
* Guide.
*
*
* @return A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB
* Developer Guide.
* @see ComparisonOperator
*/
public String getComparisonOperator() {
return this.comparisonOperator;
}
/**
*
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer
* Guide.
*
*
* @param comparisonOperator
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB
* Developer Guide.
* @return Returns a reference to this object so that method calls can be
* chained together.
* @see ComparisonOperator
*/
public Condition withComparisonOperator(String comparisonOperator) {
setComparisonOperator(comparisonOperator);
return this;
}
/**
*
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer
* Guide.
*
*
* @param comparisonOperator
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB
* Developer Guide.
* @see ComparisonOperator
*/
public void setComparisonOperator(ComparisonOperator comparisonOperator) {
this.comparisonOperator = comparisonOperator.toString();
}
/**
*
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB Developer
* Guide.
*
*
* @param comparisonOperator
* A comparator for evaluating attributes. 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"]}
*
*
*
*
* For usage examples of AttributeValueList and
* ComparisonOperator, see Legacy Conditional Parameters in the Amazon DynamoDB
* Developer Guide.
* @return Returns a reference to this object so that method calls can be
* chained together.
* @see ComparisonOperator
*/
public Condition withComparisonOperator(
ComparisonOperator comparisonOperator) {
setComparisonOperator(comparisonOperator);
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 (getAttributeValueList() != null)
sb.append("AttributeValueList: " + getAttributeValueList() + ",");
if (getComparisonOperator() != null)
sb.append("ComparisonOperator: " + getComparisonOperator());
sb.append("}");
return sb.toString();
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (obj instanceof Condition == false)
return false;
Condition other = (Condition) obj;
if (other.getAttributeValueList() == null
^ this.getAttributeValueList() == null)
return false;
if (other.getAttributeValueList() != null
&& other.getAttributeValueList().equals(
this.getAttributeValueList()) == false)
return false;
if (other.getComparisonOperator() == null
^ this.getComparisonOperator() == null)
return false;
if (other.getComparisonOperator() != null
&& other.getComparisonOperator().equals(
this.getComparisonOperator()) == false)
return false;
return true;
}
@Override
public int hashCode() {
final int prime = 31;
int hashCode = 1;
hashCode = prime
* hashCode
+ ((getAttributeValueList() == null) ? 0
: getAttributeValueList().hashCode());
hashCode = prime
* hashCode
+ ((getComparisonOperator() == null) ? 0
: getComparisonOperator().hashCode());
return hashCode;
}
@Override
public Condition clone() {
try {
return (Condition) super.clone();
} catch (CloneNotSupportedException e) {
throw new IllegalStateException(
"Got a CloneNotSupportedException from Object.clone() "
+ "even though we're Cloneable!", e);
}
}
}