Class L
java.lang.Object
com.amazonaws.services.dynamodbv2.xspec.Operand
com.amazonaws.services.dynamodbv2.xspec.PathOperand
com.amazonaws.services.dynamodbv2.xspec.L
A path operand that refers to a list attribute in DynamoDB; used for building expressions.
Use ExpressionSpecBuilder.L(String)
to instantiate this class.
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Method Summary
Modifier and TypeMethodDescriptioneq
(FunctionOperand value) Returns a comparator condition (that evaluates to true if the attribute value referred to by this path operand is equal to the specified value) for building condition expression.ifNotExists
(L that) ifNotExists
(Object... defaultValues) ifNotExists
(List<?> defaultValue) Returns anIfNotExists
object which represents an if_not_exists(path, operand) function call where path refers to that of the current path operand; used for building expressions.listAppend
(L that) Returns anListAppend
for building expression that involves a list_append(operand, operand) function for the purpose of adding the values of the specified list attribute to the current list attribute.listAppend
(Object... values) Returns anListAppend
for building expression that involves a list_append(operand, operand) function for the purpose of adding the specified values to the current list attribute.listAppend
(List<?> values) Returns anListAppend
for building expression that involves a list_append(operand, operand) function for the purpose of adding the specified list of values to that of the current list attribute.ne
(FunctionOperand value) Returns a comparator condition (that evaluates to true if the attribute value referred to by this path operand is not equal to that of the specified path operand) for building condition expression.set
(IfNotExistsFunction<L> ifNotExistsFunction) Returns aSetAction
object used for building update expression.Returns aSetAction
object used for building update expression.set
(ListAppendFunction listAppendFunction) Returns aSetAction
for adding the value of evaluating the specifiedListAppend
function as an attribute to an item.Returns aSetAction
object used for building update expression.
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Method Details
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set
Returns aSetAction
for adding the value of evaluating the specifiedListAppend
function as an attribute to an item. If this attribute already exists, it will be replaced by the new value. -
contains
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eq
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eq
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ne
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ne
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ifNotExists
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ifNotExists
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listAppend
Returns anListAppend
for building expression that involves a list_append(operand, operand) function for the purpose of adding the specified values to the current list attribute.- Parameters:
values
- the specified values to be added to the current list attribute.
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listAppend
Returns anListAppend
for building expression that involves a list_append(operand, operand) function for the purpose of adding the specified list of values to that of the current list attribute.- Parameters:
values
- the specified list of values to be added to the current list attribute.
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listAppend
Returns anListAppend
for building expression that involves a list_append(operand, operand) function for the purpose of adding the values of the specified list attribute to the current list attribute.- Parameters:
that
- the specified list attribute whose values will be added to the current list attribute.
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set
Returns aSetAction
object used for building update expression. If the attribute referred to by this path operand doesn't exist, the returned object represents adding the attribute value of the specified source path operand to an item. If the current attribute already exists, the returned object represents the value replacement of the current attribute by the attribute value of the specified source path operand. -
set
Returns aSetAction
object used for building update expression. If the attribute referred to by this path operand doesn't exist, the returned object represents adding the specified value as an attribute to an item. If the attribute referred to by this path operand already exists, the returned object represents the value replacement of the current attribute by the specified value. -
set
Returns aSetAction
object used for building update expression. If the attribute referred to by this path operand doesn't exist, the returned object represents adding the value of evaluating the specifiedIfNotExists
function as an attribute to an item. If the attribute referred to by this path operand already exists, the returned object represents the value replacement of the current attribute by the value of evaluating the specifiedIfNotExists
function. -
eq
Returns a comparator condition (that evaluates to true if the attribute value referred to by this path operand is equal to the specified value) for building condition expression. -
ne
Returns a comparator condition (that evaluates to true if the attribute value referred to by this path operand is not equal to that of the specified path operand) for building condition expression. -
ifNotExists
Returns anIfNotExists
object which represents an if_not_exists(path, operand) function call where path refers to that of the current path operand; used for building expressions."if_not_exists (path, operand) – If the item does not contain an attribute at the specified path, then if_not_exists evaluates to operand; otherwise, it evaluates to path. You can use this function to avoid overwriting an attribute already present in the item."
- Parameters:
defaultValue
- the default value that will be used as the operand to the if_not_exists function call.
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