Condition (AWS Java SDK for Amazon DynamoDB 1.10.48 API)

java.lang.Object
- com.amazonaws.services.dynamodbv2.model.Condition

All Implemented Interfaces:

Serializable, Cloneable
```
public class Condition
extends Object
implements Serializable, Cloneable
```
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.
See Also:
Serialized Form

Constructor Summary

Constructors
Constructor and Description

Condition()

Constructors
Constructor and Description
`Condition()`

Method Summary

Methods
Modifier and Type	Method and Description
`Condition`	`clone()`
`boolean`	`equals(Object obj)`
`List<AttributeValue>`	`getAttributeValueList()` One or more values to evaluate against the supplied attribute.
`String`	`getComparisonOperator()` A comparator for evaluating attributes.
`int`	`hashCode()`
`void`	`setAttributeValueList(Collection<AttributeValue> attributeValueList)` One or more values to evaluate against the supplied attribute.
`void`	`setComparisonOperator(ComparisonOperator comparisonOperator)` A comparator for evaluating attributes.
`void`	`setComparisonOperator(String comparisonOperator)` A comparator for evaluating attributes.
`String`	`toString()` Returns a string representation of this object; useful for testing and debugging.
`Condition`	`withAttributeValueList(AttributeValue... attributeValueList)` One or more values to evaluate against the supplied attribute.
`Condition`	`withAttributeValueList(Collection<AttributeValue> attributeValueList)` One or more values to evaluate against the supplied attribute.
`Condition`	`withComparisonOperator(ComparisonOperator comparisonOperator)` A comparator for evaluating attributes.
`Condition`	`withComparisonOperator(String comparisonOperator)` A comparator for evaluating attributes.

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Condition
```
public Condition()
```
- Method Detail
  - getAttributeValueList
```
public List<AttributeValue> getAttributeValueList()
```
    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.
    
    Returns:
    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.
  - setAttributeValueList
```
public void setAttributeValueList(Collection<AttributeValue> 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.
    
    Parameters:
    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.
  - withAttributeValueList
```
public Condition withAttributeValueList(AttributeValue... 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 setAttributeValueList(java.util.Collection) or withAttributeValueList(java.util.Collection) if you want to override the existing values.
    
    Parameters:
    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.
    
    Returns:
    Returns a reference to this object so that method calls can be chained together.
  - withAttributeValueList
```
public Condition withAttributeValueList(Collection<AttributeValue> 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.
    
    Parameters:
    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.
    
    Returns:
    Returns a reference to this object so that method calls can be chained together.
  - setComparisonOperator
```
public void setComparisonOperator(String 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.
    Parameters:
    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 Also:
    ComparisonOperator
  - getComparisonOperator
```
public String getComparisonOperator()
```
    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.
    Returns:
    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 Also:
    ComparisonOperator
  - withComparisonOperator
```
public Condition withComparisonOperator(String 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.
    Parameters:
    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.
    Returns:
    Returns a reference to this object so that method calls can be chained together.
    See Also:
    ComparisonOperator
  - setComparisonOperator
```
public void setComparisonOperator(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.
    Parameters:
    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 Also:
    ComparisonOperator
  - withComparisonOperator
```
public Condition withComparisonOperator(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.
    Parameters:
    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.
    Returns:
    Returns a reference to this object so that method calls can be chained together.
    See Also:
    ComparisonOperator
  - toString
```
public String toString()
```
    Returns a string representation of this object; useful for testing and debugging.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    A string representation of this object.
    See Also:
    Object.toString()
  - equals
```
public boolean equals(Object obj)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - clone
```
public Condition clone()
```
    Overrides:
    
    clone in class Object

Class Condition

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Condition

Method Detail

getAttributeValueList

setAttributeValueList

withAttributeValueList

withAttributeValueList

setComparisonOperator

getComparisonOperator

withComparisonOperator

setComparisonOperator

withComparisonOperator

toString

equals

hashCode

clone