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The ActiveMQ Client implementation
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.util;
import java.util.Arrays;
public class ByteSequence {
public byte[] data;
public int offset;
public int length;
public ByteSequence() {
}
public ByteSequence(byte data[]) {
this.data = data;
this.offset = 0;
this.length = data.length;
}
public ByteSequence(byte data[], int offset, int length) {
this.data = data;
this.offset = offset;
this.length = length;
}
public byte[] getData() {
return data;
}
public int getLength() {
return length;
}
public int getOffset() {
return offset;
}
public int remaining() { return length - offset; }
public void setData(byte[] data) {
this.data = data;
}
public void setLength(int length) {
this.length = length;
}
public void setOffset(int offset) {
this.offset = offset;
}
public void compact() {
if (length != data.length) {
byte t[] = new byte[length];
System.arraycopy(data, offset, t, 0, length);
data = t;
offset = 0;
}
}
public void reset() {
length = remaining();
if (length > 0) {
System.arraycopy(data, offset, data, 0, length);
} else {
length = 0;
}
offset = 0;
}
public int indexOf(ByteSequence needle, int pos) {
int max = length - needle.length - offset;
for (int i = pos; i < max; i++) {
if (matches(needle, i)) {
return i;
}
}
return -1;
}
private boolean matches(ByteSequence needle, int pos) {
for (int i = 0; i < needle.length; i++) {
if( data[offset + pos+ i] != needle.data[needle.offset + i] ) {
return false;
}
}
return true;
}
private byte getByte(int i) {
return data[offset+i];
}
final public int indexOf(byte value, int pos) {
for (int i = pos; i < length; i++) {
if (data[offset + i] == value) {
return i;
}
}
return -1;
}
public boolean startsWith(final byte[] bytes) {
if (length - offset < bytes.length) {
return false;
}
for (int i = 0; i