001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.activemq.util;
019
020public class ByteSequence {
021
022    public byte[] data;
023    public int offset;
024    public int length;
025
026    public ByteSequence(byte data[]) {
027        this.data = data;
028        this.offset = 0;
029        this.length = data.length;
030    }
031
032    public ByteSequence(byte data[], int offset, int length) {
033        this.data = data;
034        this.offset = offset;
035        this.length = length;
036    }
037
038    public byte[] getData() {
039        return data;
040    }
041
042    public int getLength() {
043        return length;
044    }
045
046    public int getOffset() {
047        return offset;
048    }
049
050    public void setData(byte[] data) {
051        this.data = data;
052    }
053
054    public void setLength(int length) {
055        this.length = length;
056    }
057
058    public void setOffset(int offset) {
059        this.offset = offset;
060    }
061
062    public void compact() {
063        if (length != data.length) {
064            byte t[] = new byte[length];
065            System.arraycopy(data, offset, t, 0, length);
066            data = t;
067            offset = 0;
068        }
069    }
070
071}