com.amazonaws.athena.connectors.dynamodb.util.IncrementingValueNameProducer Maven / Gradle / Ivy
/*-
* #%L
* athena-dynamodb
* %%
* Copyright (C) 2019 Amazon Web Services
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
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* #L%
*/
package com.amazonaws.athena.connectors.dynamodb.util;
/**
* A simple, repeatable name producer used to alias values in DynamoDB filter expressions.
*
* @see
* https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.ExpressionAttributeValues.html
*/
public class IncrementingValueNameProducer
{
private int i = 0;
/**
* Returns the next alias.
*
* @return the next alias
*/
public String getNext()
{
return ":v" + i++;
}
}