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The Amazon Web Services SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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/*
 * Copyright 2010-2014 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.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. 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.services.s3.model.transform;

import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import com.amazonaws.AmazonClientException;
import com.amazonaws.services.s3.internal.XmlWriter;
import com.amazonaws.services.s3.model.PartETag;
import com.amazonaws.services.s3.model.RestoreObjectRequest;

public class RequestXmlFactory {

    /**
     * Converts the specified list of PartETags to an XML fragment that can be
     * sent to the CompleteMultipartUpload operation of Amazon S3.
     *
     * @param partETags
     *            The list of part ETags containing the data to include in the
     *            new XML fragment.
     *
     * @return A byte array containing the data
     */
    public static byte[] convertToXmlByteArray(List partETags) {
        XmlWriter xml = new XmlWriter();
        xml.start("CompleteMultipartUpload");
        if (partETags != null) {
            Collections.sort(partETags, new Comparator() {
                public int compare(PartETag tag1, PartETag tag2) {
                    if (tag1.getPartNumber() < tag2.getPartNumber()) return -1;
                    if (tag1.getPartNumber() > tag2.getPartNumber()) return 1;
                    return 0;
                }
            });

            for (PartETag partEtag : partETags) {
                xml.start("Part");
                xml.start("PartNumber").value(Integer.toString(partEtag.getPartNumber())).end();
                xml.start("ETag").value(partEtag.getETag()).end();
                xml.end();
            }
        }
        xml.end();

        return xml.getBytes();
    }

    /**
     * Converts the RestoreObjectRequest to an XML fragment that can be sent to
     * the RestoreObject operation of Amazon S3.
     *
     * @param restoreObjectRequest
     *            The container which provides options for restoring an object,
     *            which was transitioned to the Glacier from S3 when it was
     *            expired, into S3 again.
     *
     * @return A byte array containing the data
     *
     * @throws AmazonClientException
     */
    public static byte[] convertToXmlByteArray(RestoreObjectRequest restoreObjectRequest) throws AmazonClientException {
        XmlWriter xml = new XmlWriter();

        xml.start("RestoreRequest");
        xml.start("Days").value(Integer.toString(restoreObjectRequest.getExpirationInDays())).end();
        xml.end();

        return xml.getBytes();
    }
}