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    
018    package org.apache.activemq.util;
019    
020    public 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    }