@Generated(value="com.amazonaws:aws-java-sdk-code-generator") public class ExpectedAttributeValue extends Object implements Serializable, Cloneable, StructuredPojo
Represents a condition to be compared with an attribute value. This condition can be used with
DeleteItem, PutItem, or UpdateItem operations; if the comparison evaluates to
true, the operation succeeds; if not, the operation fails. You can use ExpectedAttributeValue in one of
two different ways:
Use AttributeValueList to specify one or more values to compare against an attribute. Use
ComparisonOperator to specify how you want to perform the comparison. If the comparison evaluates to
true, then the conditional operation succeeds.
Use Value to specify a value that DynamoDB will compare against an attribute. If the values match, then
ExpectedAttributeValue evaluates to true and the conditional operation succeeds. Optionally, you can
also set Exists to false, indicating that you do not expect to find the attribute value in the
table. In this case, the conditional operation succeeds only if the comparison evaluates to false.
Value and Exists are incompatible with AttributeValueList and
ComparisonOperator. Note that if you use both sets of parameters at once, DynamoDB will return a
ValidationException exception.
| Constructor and Description |
|---|
ExpectedAttributeValue()
Default constructor for ExpectedAttributeValue object.
|
ExpectedAttributeValue(AttributeValue value)
Constructs a new ExpectedAttributeValue object.
|
ExpectedAttributeValue(Boolean exists)
Constructs a new ExpectedAttributeValue object.
|
| Modifier and Type | Method and Description |
|---|---|
ExpectedAttributeValue |
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 in the
AttributeValueList. |
Boolean |
getExists()
Causes DynamoDB to evaluate the value before attempting a conditional operation:
|
AttributeValue |
getValue()
Represents the data for the expected attribute.
|
int |
hashCode() |
Boolean |
isExists()
Causes DynamoDB to evaluate the value before attempting a conditional operation:
|
void |
marshall(ProtocolMarshaller protocolMarshaller) |
void |
setAttributeValueList(Collection<AttributeValue> attributeValueList)
One or more values to evaluate against the supplied attribute.
|
void |
setComparisonOperator(ComparisonOperator comparisonOperator)
A comparator for evaluating attributes in the
AttributeValueList. |
void |
setComparisonOperator(String comparisonOperator)
A comparator for evaluating attributes in the
AttributeValueList. |
void |
setExists(Boolean exists)
Causes DynamoDB to evaluate the value before attempting a conditional operation:
|
void |
setValue(AttributeValue value)
Represents the data for the expected attribute.
|
String |
toString()
Returns a string representation of this object.
|
ExpectedAttributeValue |
withAttributeValueList(AttributeValue... attributeValueList)
One or more values to evaluate against the supplied attribute.
|
ExpectedAttributeValue |
withAttributeValueList(Collection<AttributeValue> attributeValueList)
One or more values to evaluate against the supplied attribute.
|
ExpectedAttributeValue |
withComparisonOperator(ComparisonOperator comparisonOperator)
A comparator for evaluating attributes in the
AttributeValueList. |
ExpectedAttributeValue |
withComparisonOperator(String comparisonOperator)
A comparator for evaluating attributes in the
AttributeValueList. |
ExpectedAttributeValue |
withExists(Boolean exists)
Causes DynamoDB to evaluate the value before attempting a conditional operation:
|
ExpectedAttributeValue |
withValue(AttributeValue value)
Represents the data for the expected attribute.
|
public ExpectedAttributeValue()
public ExpectedAttributeValue(AttributeValue value)
value - Represents the data for the expected attribute.
Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.
For more information, see Data Types in the Amazon DynamoDB Developer Guide.
public ExpectedAttributeValue(Boolean exists)
exists - Causes DynamoDB to evaluate the value before attempting a conditional operation:
If Exists is true, DynamoDB will check to see if that attribute value already
exists in the table. If it is found, then the operation succeeds. If it is not found, the operation fails
with a ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in
the table. If in fact the value does not exist, then the assumption is valid and the operation succeeds.
If the value is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all
by itself, DynamoDB assumes the attribute exists: You don't have to set Exists to
true, because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value
to exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect an
attribute to have a value, while also expecting it not to exist.)
public void setValue(AttributeValue value)
Represents the data for the expected attribute.
Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.
For more information, see Data Types in the Amazon DynamoDB Developer Guide.
value - Represents the data for the expected attribute.
Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.
For more information, see Data Types in the Amazon DynamoDB Developer Guide.
public AttributeValue getValue()
Represents the data for the expected attribute.
Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.
For more information, see Data Types in the Amazon DynamoDB Developer Guide.
Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.
For more information, see Data Types in the Amazon DynamoDB Developer Guide.
public ExpectedAttributeValue withValue(AttributeValue value)
Represents the data for the expected attribute.
Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.
For more information, see Data Types in the Amazon DynamoDB Developer Guide.
value - Represents the data for the expected attribute.
Each attribute value is described as a name-value pair. The name is the data type, and the value is the data itself.
For more information, see Data Types in the Amazon DynamoDB Developer Guide.
public void setExists(Boolean exists)
Causes DynamoDB to evaluate the value before attempting a conditional operation:
If Exists is true, DynamoDB will check to see if that attribute value already exists in
the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in the
table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value
is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all by
itself, DynamoDB assumes the attribute exists: You don't have to set Exists to true,
because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value to
exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect an
attribute to have a value, while also expecting it not to exist.)
exists - Causes DynamoDB to evaluate the value before attempting a conditional operation:
If Exists is true, DynamoDB will check to see if that attribute value already
exists in the table. If it is found, then the operation succeeds. If it is not found, the operation fails
with a ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in
the table. If in fact the value does not exist, then the assumption is valid and the operation succeeds.
If the value is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all
by itself, DynamoDB assumes the attribute exists: You don't have to set Exists to
true, because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value
to exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect an
attribute to have a value, while also expecting it not to exist.)
public Boolean getExists()
Causes DynamoDB to evaluate the value before attempting a conditional operation:
If Exists is true, DynamoDB will check to see if that attribute value already exists in
the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in the
table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value
is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all by
itself, DynamoDB assumes the attribute exists: You don't have to set Exists to true,
because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value to
exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect an
attribute to have a value, while also expecting it not to exist.)
If Exists is true, DynamoDB will check to see if that attribute value already
exists in the table. If it is found, then the operation succeeds. If it is not found, the operation fails
with a ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in
the table. If in fact the value does not exist, then the assumption is valid and the operation succeeds.
If the value is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all
by itself, DynamoDB assumes the attribute exists: You don't have to set Exists to
true, because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value
to exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect
an attribute to have a value, while also expecting it not to exist.)
public ExpectedAttributeValue withExists(Boolean exists)
Causes DynamoDB to evaluate the value before attempting a conditional operation:
If Exists is true, DynamoDB will check to see if that attribute value already exists in
the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in the
table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value
is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all by
itself, DynamoDB assumes the attribute exists: You don't have to set Exists to true,
because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value to
exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect an
attribute to have a value, while also expecting it not to exist.)
exists - Causes DynamoDB to evaluate the value before attempting a conditional operation:
If Exists is true, DynamoDB will check to see if that attribute value already
exists in the table. If it is found, then the operation succeeds. If it is not found, the operation fails
with a ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in
the table. If in fact the value does not exist, then the assumption is valid and the operation succeeds.
If the value is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all
by itself, DynamoDB assumes the attribute exists: You don't have to set Exists to
true, because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value
to exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect an
attribute to have a value, while also expecting it not to exist.)
public Boolean isExists()
Causes DynamoDB to evaluate the value before attempting a conditional operation:
If Exists is true, DynamoDB will check to see if that attribute value already exists in
the table. If it is found, then the operation succeeds. If it is not found, the operation fails with a
ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in the
table. If in fact the value does not exist, then the assumption is valid and the operation succeeds. If the value
is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all by
itself, DynamoDB assumes the attribute exists: You don't have to set Exists to true,
because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value to
exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect an
attribute to have a value, while also expecting it not to exist.)
If Exists is true, DynamoDB will check to see if that attribute value already
exists in the table. If it is found, then the operation succeeds. If it is not found, the operation fails
with a ConditionCheckFailedException.
If Exists is false, DynamoDB assumes that the attribute value does not exist in
the table. If in fact the value does not exist, then the assumption is valid and the operation succeeds.
If the value is found, despite the assumption that it does not exist, the operation fails with a
ConditionCheckFailedException.
The default setting for Exists is true. If you supply a Value all
by itself, DynamoDB assumes the attribute exists: You don't have to set Exists to
true, because it is implied.
DynamoDB returns a ValidationException if:
Exists is true but there is no Value to check. (You expect a value
to exist, but don't specify what that value is.)
Exists is false but you also provide a Value. (You cannot expect
an attribute to have a value, while also expecting it not to exist.)
public void setComparisonOperator(String comparisonOperator)
A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than,
less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types, 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 data types, 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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to 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"]}
comparisonOperator - A comparator for evaluating attributes in the AttributeValueList. For example, equals,
greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types,
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 data types,
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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to 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"]}
ComparisonOperatorpublic String getComparisonOperator()
A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than,
less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types, 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 data types, 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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to 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"]}
AttributeValueList. For example, equals,
greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types,
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 data types,
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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to 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"]}
ComparisonOperatorpublic ExpectedAttributeValue withComparisonOperator(String comparisonOperator)
A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than,
less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types, 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 data types, 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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to 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"]}
comparisonOperator - A comparator for evaluating attributes in the AttributeValueList. For example, equals,
greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types,
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 data types,
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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to 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"]}
ComparisonOperatorpublic void setComparisonOperator(ComparisonOperator comparisonOperator)
A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than,
less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types, 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 data types, 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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to 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"]}
comparisonOperator - A comparator for evaluating attributes in the AttributeValueList. For example, equals,
greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types,
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 data types,
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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to 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"]}
ComparisonOperatorpublic ExpectedAttributeValue withComparisonOperator(ComparisonOperator comparisonOperator)
A comparator for evaluating attributes in the AttributeValueList. For example, equals, greater than,
less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types, 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 data types, 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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type String,
Number, or Binary. These attributes are compared against an existing attribute of an item. If any elements of the
input are equal to 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"]}
comparisonOperator - A comparator for evaluating attributes in the AttributeValueList. For example, equals,
greater than, less than, etc.
The following comparison operators are available:
EQ | NE | LE | LT | GE | GT | NOT_NULL | NULL | CONTAINS | NOT_CONTAINS | BEGINS_WITH | IN | BETWEEN
The following are descriptions of each comparison operator.
EQ : Equal. EQ is supported for all data types, 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 data types, 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 data types,
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 data types,
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 in a list.
AttributeValueList can contain one or more AttributeValue elements of type
String, Number, or Binary. These attributes are compared against an existing attribute of an item. If any
elements of the input are equal to 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"]}
ComparisonOperatorpublic 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.
For information on specifying data types in JSON, see JSON Data Format in the Amazon DynamoDB Developer Guide.
ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values.
For example, a is greater than A, and a is greater than
B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
For information on specifying data types in JSON, see JSON Data Format in the Amazon DynamoDB Developer Guide.
public void setAttributeValueList(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.
For information on specifying data types in JSON, see JSON Data Format in the Amazon DynamoDB Developer Guide.
attributeValueList - One or more values to evaluate against the supplied attribute. The number of values in the list depends on
the ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values.
For example, a is greater than A, and a is greater than
B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
For information on specifying data types in JSON, see JSON Data Format in the Amazon DynamoDB Developer Guide.
public ExpectedAttributeValue 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.
For information on specifying data types in JSON, see JSON Data Format in the Amazon DynamoDB Developer Guide.
NOTE: This method appends the values to the existing list (if any). Use
setAttributeValueList(java.util.Collection) or withAttributeValueList(java.util.Collection) if
you want to override the existing values.
attributeValueList - One or more values to evaluate against the supplied attribute. The number of values in the list depends on
the ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values.
For example, a is greater than A, and a is greater than
B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
For information on specifying data types in JSON, see JSON Data Format in the Amazon DynamoDB Developer Guide.
public ExpectedAttributeValue 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.
For information on specifying data types in JSON, see JSON Data Format in the Amazon DynamoDB Developer Guide.
attributeValueList - One or more values to evaluate against the supplied attribute. The number of values in the list depends on
the ComparisonOperator being used.
For type Number, value comparisons are numeric.
String value comparisons for greater than, equals, or less than are based on ASCII character code values.
For example, a is greater than A, and a is greater than
B. For a list of code values, see http://en.wikipedia.org/wiki/ASCII#ASCII_printable_characters.
For Binary, DynamoDB treats each byte of the binary data as unsigned when it compares binary values.
For information on specifying data types in JSON, see JSON Data Format in the Amazon DynamoDB Developer Guide.
public String toString()
toString in class ObjectObject.toString()public ExpectedAttributeValue clone()
public void marshall(ProtocolMarshaller protocolMarshaller)
marshall in interface StructuredPojoCopyright © 2020. All rights reserved.