com.amazonaws.services.dynamodbv2.datamodeling

Class VersionAttributeConditionExpressionGenerator

java.lang.Object

com.amazonaws.services.dynamodbv2.datamodeling.VersionAttributeConditionExpressionGenerator

public class VersionAttributeConditionExpressionGenerator
extends Object

This class contains logic to generate condition expressions for version attribute TODO: Change the logic in this class to use Builder pattern instead. This will help avoid state leak that this class currently has.

Constructor Summary

Constructors

Constructor and Description
VersionAttributeConditionExpressionGenerator()

Method Summary

Modifier and Type	Method and Description
void	appendVersionAttributeToConditionExpression(DynamoDBMapperFieldModel<Object,Object> field, Object fieldValue) Generates condition expression for a given version attribute and appends this generated condition expression to any previously generated version attribute condition expressions.
DynamoDBTransactionWriteExpression	getVersionAttributeConditionExpression() Call this method *after* you've completed calling appendVersionAttributeToConditionExpression() for each of the version attributes in a given item.

Methods inherited from class java.lang.Object

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

Constructor Detail

VersionAttributeConditionExpressionGenerator

public VersionAttributeConditionExpressionGenerator()

Method Detail

appendVersionAttributeToConditionExpression

public void appendVersionAttributeToConditionExpression(DynamoDBMapperFieldModel<Object,Object> field,
                                                        Object fieldValue)

Generates condition expression for a given version attribute and appends this generated condition expression to any previously generated version attribute condition expressions.

getVersionAttributeConditionExpression

public DynamoDBTransactionWriteExpression getVersionAttributeConditionExpression()

Call this method *after* you've completed calling appendVersionAttributeToConditionExpression() for each of the version attributes in a given item. The versionAttributeConditionExpression being returned is mutable inside and outside of this class.