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The AWS SDK for Java with support for OSGi. The AWS 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 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.
 * 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;

import static com.amazonaws.util.IOUtils.release;

import java.io.File;
import java.io.InputStream;

import org.apache.commons.logging.Log;

/**
 * Used to represent an S3 data source that either has a file or an input
 * stream.
 */
public interface S3DataSource {
    public File getFile();
    public void setFile(File file);
    public InputStream getInputStream();
    public void setInputStream(InputStream inputStream);

    /**
     * {@link S3DataSource} specific utilities.
     */
    public static enum Utils {
        ;
        /**
         * Clean up any temporary streams created during the execution,
         * and restore the original file and/or input stream.
         */
        public static void cleanupDataSource(S3DataSource req,
                final File fileOrig, final InputStream inputStreamOrig,
                InputStream inputStreamCurr, Log log) {
            if (fileOrig != null) {
                // We opened a file underneath so would need to release it
                release(inputStreamCurr, log);
            }
            // restore the original input stream so the caller could close
            // it if necessary
            req.setInputStream(inputStreamOrig);
            req.setFile(fileOrig);
        }
    }
}