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/*
*
* 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.qpid.server.protocol;
import java.util.HashMap;
import java.util.Map;
import org.apache.qpid.server.message.ServerMessage;
import org.apache.qpid.server.plugin.MessageConverter;
import org.apache.qpid.server.plugin.QpidServiceLoader;
public class MessageConverterRegistry
{
private static Map<Class<? extends ServerMessage>, Map<Class<? extends ServerMessage>, MessageConverter>> _converters =
new HashMap<Class<? extends ServerMessage>, Map<Class<? extends ServerMessage>, MessageConverter>>();
static
{
for(MessageConverter<? extends ServerMessage, ? extends ServerMessage> converter : (new QpidServiceLoader<MessageConverter>()).instancesOf(MessageConverter.class))
{
Map<Class<? extends ServerMessage>, MessageConverter> map = _converters.get(converter.getInputClass());
if(map == null)
{
map = new HashMap<Class<? extends ServerMessage>, MessageConverter>();
_converters.put(converter.getInputClass(), map);
}
map.put(converter.getOutputClass(),converter);
}
}
public static <M extends ServerMessage,N extends ServerMessage> MessageConverter<M, N> getConverter(Class<M> from, Class<N> to)
{
Map<Class<? extends ServerMessage>, MessageConverter> map = _converters.get(from);
if(map == null)
{
map = _converters.get(ServerMessage.class);
}
return map == null ? null : map.get(to);
}
}
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