com.amazonaws.services.dynamodbv2.datamodeling

Class DynamoDBTransactionWriteExpression

java.lang.Object

com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBTransactionWriteExpression

public class DynamoDBTransactionWriteExpression
extends Object

Enables adding condition expression parameter to transactionWrite operation via TransactionWriteRequest. For example, you may want to update only if an attribute has a particular value.

See Also:

TransactionWriteRequest.addPut(Object, DynamoDBTransactionWriteExpression), AbstractDynamoDBMapper.transactionWrite(TransactionWriteRequest)

Constructor Summary

Constructors

Constructor and Description
DynamoDBTransactionWriteExpression()

Method Summary

Modifier and Type	Method and Description
String	getConditionExpression() A condition that must be satisfied in order for a conditional write to succeed.
Map<String,String>	getExpressionAttributeNames() One or more substitution tokens for attribute names in an expression.
Map<String,AttributeValue>	getExpressionAttributeValues() One or more values that can be substituted in an expression.
DynamoDBTransactionWriteExpression	withConditionExpression(String conditionExpression) A condition that must be satisfied in order for a conditional write to succeed.
DynamoDBTransactionWriteExpression	withExpressionAttributeNames(Map<String,String> expressionAttributeNames) One or more substitution tokens for attribute names in an expression.
DynamoDBTransactionWriteExpression	withExpressionAttributeValues(Map<String,AttributeValue> expressionAttributeValues) One or more values that can be substituted in an expression.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DynamoDBTransactionWriteExpression

public DynamoDBTransactionWriteExpression()

Method Detail

withConditionExpression

public DynamoDBTransactionWriteExpression withConditionExpression(String conditionExpression)

A condition that must be satisfied in order for a conditional write to succeed.

getConditionExpression

public String getConditionExpression()

A condition that must be satisfied in order for a conditional write to succeed.

withExpressionAttributeNames

public DynamoDBTransactionWriteExpression withExpressionAttributeNames(Map<String,String> expressionAttributeNames)

One or more substitution tokens for attribute names in an expression.

getExpressionAttributeNames

public Map<String,String> getExpressionAttributeNames()

One or more substitution tokens for attribute names in an expression.

withExpressionAttributeValues

public DynamoDBTransactionWriteExpression withExpressionAttributeValues(Map<String,AttributeValue> expressionAttributeValues)

One or more values that can be substituted in an expression.

getExpressionAttributeValues

public Map<String,AttributeValue> getExpressionAttributeValues()

One or more values that can be substituted in an expression.