Class ConditionCheck<T>

java.lang.Object

software.amazon.awssdk.enhanced.dynamodb.model.ConditionCheck<T>

Type Parameters:

T - The type of the modelled object.

All Implemented Interfaces:

TransactableWriteOperation<T>

@ThreadSafe
public final class ConditionCheck<T>
extends Object
implements TransactableWriteOperation<T>

Use ConditionCheck as a part of the composite operation transactGetItems (for example DynamoDbEnhancedClient.transactGetItems(TransactGetItemsEnhancedRequest)) to determine if the other actions that are part of the same transaction should take effect.

A valid ConditionCheck object should contain a reference to the primary key of the table that finds items with a matching key, together with a condition (of type Expression) to evaluate the primary key.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	ConditionCheck.Builder	A builder that is used to create a condition check with the desired parameters.

Method Summary

Modifier and Type	Method	Description
static ConditionCheck.Builder	builder()	Creates a newly initialized builder for this object.
Expression	conditionExpression()	Returns the condition Expression set on this object, or null if it doesn't exist.
boolean	equals(Object o)
TransactWriteItem	generateTransactWriteItem(TableSchema<T> tableSchema, OperationContext operationContext, DynamoDbEnhancedClientExtension dynamoDbEnhancedClientExtension)
int	hashCode()
Key	key()	Returns the primary Key that the condition is valid for, or null if it doesn't exist.
ReturnValuesOnConditionCheckFailure	returnValuesOnConditionCheckFailure()	Returns what values to return if the condition check fails.
String	returnValuesOnConditionCheckFailureAsString()	Returns what values to return if the condition check fails.
ConditionCheck.Builder	toBuilder()	Returns a builder initialized with all existing values on the object.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Method Details

builder

public static ConditionCheck.Builder builder()

Creates a newly initialized builder for this object.

toBuilder

public ConditionCheck.Builder toBuilder()

Returns a builder initialized with all existing values on the object.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

key

public Key key()

Returns the primary Key that the condition is valid for, or null if it doesn't exist.

conditionExpression

public Expression conditionExpression()

Returns the condition Expression set on this object, or null if it doesn't exist.

returnValuesOnConditionCheckFailure

public ReturnValuesOnConditionCheckFailure returnValuesOnConditionCheckFailure()

Returns what values to return if the condition check fails.

If the service returns an enum value that is not available in the current SDK version, returnValuesOnConditionCheckFailure will return ReturnValuesOnConditionCheckFailure.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnValuesOnConditionCheckFailureAsString().

Returns:

What values to return on condition check failure.

returnValuesOnConditionCheckFailureAsString

public String returnValuesOnConditionCheckFailureAsString()

Returns what values to return if the condition check fails.

If the service returns an enum value that is not available in the current SDK version, returnValuesOnConditionCheckFailure will return ReturnValuesOnConditionCheckFailure.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnValuesOnConditionCheckFailureAsString().

Returns:

What values to return on condition check failure.

generateTransactWriteItem

public TransactWriteItem generateTransactWriteItem(TableSchema<T> tableSchema,
 OperationContext operationContext,
 DynamoDbEnhancedClientExtension dynamoDbEnhancedClientExtension)

Specified by:

generateTransactWriteItem in interface TransactableWriteOperation<T>