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