/**
 * Copyright (c) 2014, Sebastian Sdorra All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer. 2. Redistributions in
 * binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other
 * materials provided with the distribution. 3. Neither the name of SCM-Manager;
 * nor the names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * http://bitbucket.org/sdorra/scm-manager
 *
 */



package sonia.scm.net.ahc;

//~--- non-JDK imports --------------------------------------------------------

import com.google.common.io.ByteStreams;
import com.google.common.io.Closeables;

//~--- JDK imports ------------------------------------------------------------

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * Sets the content of the file to the request.
 *
 * @author Sebastian Sdorra
 * @since 1.46
 */
public class FileContent implements Content
{

  /**
   * Constructs a new {@link FileContent}.
   *
   *
   * @param file file
   */
  public FileContent(File file)
  {
    this.file = file;
  }

  //~--- methods --------------------------------------------------------------

  /**
   * Sets the content length of the file as request header.
   *
   *
   * @param request request
   */
  @Override
  public void prepare(AdvancedHttpRequestWithBody request)
  {
    request.contentLength(file.length());
  }

  /**
   * Copies the content of the file to the output stream.
   *
   *
   * @param output output stream
   *
   * @throws IOException
   */
  @Override
  public void process(OutputStream output) throws IOException
  {
    InputStream stream = null;

    try
    {
      stream = new FileInputStream(file);
      ByteStreams.copy(stream, output);
    }
    finally
    {
      Closeables.close(stream, true);
    }
  }

  //~--- fields ---------------------------------------------------------------

  /** file */
  private final File file;
}
