001    /*
002     * Copyright (c) 2007-2014 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    
021    package cascading.tuple.hadoop.io;
022    
023    import java.io.ByteArrayInputStream;
024    
025    /**
026     *
027     */
028    public 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