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  * Copyright 2014-2015, 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
 * or in the "license" file accompanying this file. This file is distributed
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
import static com.amazonaws.util.IOUtils.release;
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);

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 fileOrigfinal InputStream inputStreamOrig,
                InputStream inputStreamCurrLog log) {
            if (fileOrig != null) {
                // We opened a file underneath so would need to release it
            // restore the original input stream so the caller could close
            // it if necessary
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