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&{MainRegistry.java}
/*
*
* 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.
*
*/
/*
* This file is auto-generated by ${GENERATOR} - do not modify.
* Supported AMQP versions:
%{VLIST} * ${major}-${minor}
*/
package org.apache.qpid.framing;
import java.util.HashMap;
import java.lang.reflect.Constructor;
import org.apache.log4j.Logger;
class MainRegistry
{
private static final Logger _log = Logger.getLogger(MainRegistry.class);
private static HashMap<Long, Class> classIDMethodIDVersionBodyMap = new HashMap<Long, Class>();
static
{
%{CLIST} ${reg_map_put_method}
}
public static AMQMethodBody get(short classID, short methodID, byte major, byte minor)
throws AMQFrameDecodingException
{
Class bodyClass = classIDMethodIDVersionBodyMap.get(
createMapKey(classID, methodID, major, minor));
if (bodyClass == null)
{
throw new AMQFrameDecodingException(_log,
"Unable to find a suitable decoder for class " + classID + " and method " +
methodID + " in AMQP version " + major + "-" + minor + ".");
}
try
{
Constructor initFn = bodyClass.getConstructor(byte.class, byte.class);
return (AMQMethodBody) initFn.newInstance(major, minor);
}
catch (Exception e)
{
throw new AMQFrameDecodingException(_log,
"Unable to instantiate body class for class " + classID + " and method " +
methodID + " in AMQP version " + major + "-" + minor + " : " + e, e);
}
}
private static Long createMapKey(short classID, short methodID, byte major, byte minor)
{
/**
* Mapping of 4 components into a guaranteed unique key:
* MSB LSB
* +----+----+----+----+----+----+-----+-----+
* | 0 | classID |methodID |major|minor|
* +----+----+----+----+----+----+-----+-----+
*/
return new Long(((long)classID << 32) + ((long)methodID << 16) + ((long)major << 8) + minor);
}
}
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