Android Open Source - lucene Progress Reporting Input Stream

From Project

Back to project page lucene.

License

The source code is released under:

GNU General Public License

If you think the Android project lucene listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/**
 * Copyright (C) 2011-2012 Takahiro Yoshimura
 */*from   w w  w .  j  a v a 2s  . c  o  m*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * AdMob library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 *
 * You must obey the GNU General Public License in all respects for
 * all of the code used other than AdMob.  If you modify file(s) with
 * this exception, you may extend this exception to your version of
 * the file(s), but you are not obligated to do so.  If you do not
 * wish to do so, delete this exception statement from your version.
 * If you delete this exception statement from all source files in the
 * program, then also delete it here.
 */

package com.gmail.altakey.lucene;

import java.io.*;

public final class ProgressReportingInputStream extends FilterInputStream
{
  public interface ProgressListener
  {
    void onAdvance(long at, long length);
  }

  private int marked = 0;
  private long position = 0;
  private ProgressListener listener;

  public ProgressReportingInputStream(final InputStream in, final ProgressListener listener)
  {
    super(in);
    this.listener = listener;
  }

  @Override
  public int read(byte[] buffer, int offset, int count) throws IOException
  {
    final int advanced = super.read(buffer, offset, count);
    this.position += advanced;
    this.report();
    return advanced;
  }

  @Override
  public synchronized void reset() throws IOException
  {
    super.reset();
    this.position = this.marked;
  }

  @Override
  public synchronized void mark(int readlimit)
  {
    super.mark(readlimit);
    this.marked = readlimit;
  }

  @Override
  public long skip(long byteCount) throws IOException
  {
    long advanced = super.skip(byteCount);
    this.position += advanced;
    this.report();
    return advanced;
  }

  private void report()
  {
    if (this.listener == null)
      return;

    try
    {
      this.listener.onAdvance(this.position, this.position + this.in.available());
    }
    catch (IOException e)
    {
      this.listener.onAdvance(this.position, 0);
    }
  }
}

Java Source Code List