/*
* 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.mobileconnectors.dynamodbv2.dynamodbmapper.S3Link;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
/**
* A marshaller that marshals {@code S3Link} objects to DynamoDB Strings, using
* a JSON encoding. For example: {"s3":{"region":"us-west-2",
* "bucket":"my-bucket-name", "key": "foo/bar/baz.txt"}}.
*/
public class S3LinkToStringMarshaller implements StringAttributeMarshaller {
private static final S3LinkToStringMarshaller INSTANCE =
new S3LinkToStringMarshaller();
public static S3LinkToStringMarshaller instance() {
return INSTANCE;
}
private S3LinkToStringMarshaller() {
}
@Override
public AttributeValue marshall(Object obj) {
S3Link s3link = (S3Link) obj;
if (s3link.getBucketName() == null || s3link.getKey() == null) {
// insufficient S3 resource specification
return null;
}
return new AttributeValue().withS(s3link.toJson());
}
}