/*
 * Created on 19.11.2003
 *
 * (c) Stabsstelle IKT-Strategie des Bundes
 */
package at.gv.egovernment.moa.spss.slinterface.filters;

import java.io.ByteArrayInputStream;
import java.io.IOException;

/**
 * @author Gregor Karlinger (mailto:gregor.karlinger@cio.gv.at) 
 */
public class ServletInputStream extends javax.servlet.ServletInputStream
{
  private ByteArrayInputStream inputStream_;
  private int length_;

  /* ---------------------------------------------------------------------------------------------------- */

  /**
   * Generates a new <code>ServletInputStram</code> from the specified stream.
   * 
   * @param inputStream See above. 
   */
  public ServletInputStream(ByteArrayInputStream inputStream)
  {
    super();
    inputStream_ = inputStream;
    length_ = inputStream_.available();
  }

  /* ---------------------------------------------------------------------------------------------------- */

  /**
   * Reads a single byte from the underlying <code>ByteArrayInputStream</code>.
   * 
   * @see java.io.InputStream#read()
   */
  public int read() throws IOException
  {
    return inputStream_.read();
  }

  /* ---------------------------------------------------------------------------------------------------- */

  /**
   * Gets the length of the content from this input stream. This equals to the number of bytes which where
   * available at the time of creating this <code>ServletInputStream</code>.
   */
  public int getContentLength()
  {
    return length_;
  }
}