    001/*
    002 * Copyright (c) 2007-2016 Concurrent, Inc. All Rights Reserved.
    003 *
    004 * Project and contact information: http://www.cascading.org/
    005 *
    006 * This file is part of the Cascading project.
    007 *
    008 * Licensed under the Apache License, Version 2.0 (the "License");
    009 * you may not use this file except in compliance with the License.
    010 * You may obtain a copy of the License at
    011 *
    012 *     http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing, software
    015 * distributed under the License is distributed on an "AS IS" BASIS,
    016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    017 * See the License for the specific language governing permissions and
    018 * limitations under the License.
    019 */
    020
    021package cascading.tuple.hadoop.io;
    022
    023import java.io.ByteArrayInputStream;
    024
    025/**
    026 *
    027 */
    028public class BufferedInputStream extends ByteArrayInputStream
    029  {
    030  private static final byte[] ZERO_BYTES = new byte[]{};
    031
    032  public BufferedInputStream()
    033    {
    034    super( ZERO_BYTES );
    035    }
    036
    037  public void reset( byte[] input, int start, int length )
    038    {
    039    this.buf = input;
    040    this.count = start + length;
    041    this.mark = start;
    042    this.pos = start;
    043    }
    044
    045  public byte[] getBuffer()
    046    {
    047    return buf;
    048    }
    049
    050  public int getPosition()
    051    {
    052    return pos;
    053    }
    054
    055  public int getLength()
    056    {
    057    return count;
    058    }
    059
    060  public void clear()
    061    {
    062    this.buf = ZERO_BYTES;
    063    this.count = 0;
    064    this.mark = 0;
    065    this.pos = 0;
    066    }
    067  }
    068