/*
* Copyright 2014-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* 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://aws.amazon.com/apache2.0
*
* This file 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
* limitations under the License.
*/
package com.amazonaws.mobileconnectors.dynamodbv2.dynamodbmapper.marshallers;
import com.amazonaws.mobileconnectors.dynamodbv2.dynamodbmapper.ArgumentMarshaller.StringAttributeMarshaller;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
/**
* A marshaller that marshals Java {@code String} objects to DynamoDB Strings.
*/
public class StringToStringMarshaller implements StringAttributeMarshaller {
private static final StringToStringMarshaller INSTANCE =
new StringToStringMarshaller();
public static StringToStringMarshaller instance() {
return INSTANCE;
}
private StringToStringMarshaller() {
}
@Override
public AttributeValue marshall(Object obj) {
String string = (String) obj;
if (string.length() == 0) {
// Sticking with the legacy behavior for now.
return null;
}
return new AttributeValue().withS(string);
}
}