/**
* 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.transport.protocol;
import org.apache.activemq.command.WireFormatInfo;
import org.apache.activemq.openwire.OpenWireFormat;
import org.apache.activemq.openwire.OpenWireFormatFactory;
/**
*
*
*/
public class OpenWireProtocolVerifier implements ProtocolVerifier {
protected final OpenWireFormatFactory wireFormatFactory;
public OpenWireProtocolVerifier(OpenWireFormatFactory wireFormatFactory) {
this.wireFormatFactory = wireFormatFactory;
}
/* (non-Javadoc)
* @see org.apache.activemq.broker.transport.protocol.ProtocolVerifier#isProtocol(byte[])
*/
@Override
public boolean isProtocol(byte[] value) {
if (value.length < 8) {
throw new IllegalArgumentException("Protocol header length changed "
+ value.length);
}
int start = !((OpenWireFormat)wireFormatFactory.createWireFormat()).isSizePrefixDisabled() ? 4 : 0;
int j = 0;
// type
if (value[start] != WireFormatInfo.DATA_STRUCTURE_TYPE) {
return false;
}
start++;
WireFormatInfo info = new WireFormatInfo();
final byte[] magic = info.getMagic();
int remainingLen = value.length - start;
int useLen = remainingLen > magic.length ? magic.length : remainingLen;
useLen += start;
// magic
for (int i = start; i < useLen; i++) {
if (value[i] != magic[j]) {
return false;
}
j++;
}
return true;
}
}