com.amazonaws.services.dynamodbv2.datamodeling

Class DynamoDBTransactionLoadExpression

java.lang.Object

com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBTransactionLoadExpression

public class DynamoDBTransactionLoadExpression
extends Object

Enables adding projection expression parameters to transactionLoad operation via TransactionGetRequest. For example, you may want to get only specific attributes of an item.

See Also:

TransactionLoadRequest.addLoad(Object, DynamoDBTransactionLoadExpression), AbstractDynamoDBMapper.transactionLoad(TransactionLoadRequest)

Constructor Summary

Constructors

Constructor and Description
DynamoDBTransactionLoadExpression()

Method Summary

Modifier and Type	Method and Description
Map<String,String>	getExpressionAttributeNames() One or more substitution tokens for attribute names in the ProjectionExpression parameter.
String	getProjectionExpression() A string that identifies one or more attributes of the specified item to retrieve from the table.
DynamoDBTransactionLoadExpression	withExpressionAttributeNames(Map<String,String> expressionAttributeNames) One or more substitution tokens for attribute names in the ProjectionExpression parameter.
DynamoDBTransactionLoadExpression	withProjectionExpression(String projectionExpression) A string that identifies one or more attributes of the specified item to retrieve from the table.

Methods inherited from class java.lang.Object

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

Constructor Detail

DynamoDBTransactionLoadExpression

public DynamoDBTransactionLoadExpression()

Method Detail

withProjectionExpression

public DynamoDBTransactionLoadExpression withProjectionExpression(String projectionExpression)

A string that identifies one or more attributes of the specified item to retrieve from the table. The attributes in the expression must be separated by commas. If no attribute names are specified, then all attributes of the specified item are returned. If any of the requested attributes are not found, they do not appear in the result.

getProjectionExpression

public String getProjectionExpression()

A string that identifies one or more attributes of the specified item to retrieve from the table. The attributes in the expression must be separated by commas. If no attribute names are specified, then all attributes of the specified item are returned. If any of the requested attributes are not found, they do not appear in the result.

withExpressionAttributeNames

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

One or more substitution tokens for attribute names in the ProjectionExpression parameter.

getExpressionAttributeNames

public Map<String,String> getExpressionAttributeNames()

One or more substitution tokens for attribute names in the ProjectionExpression parameter.