/**
*
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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.geronimo.network.protocol.control.commands;
import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.Map;
import org.apache.geronimo.network.protocol.PacketField;
import org.apache.geronimo.network.protocol.PacketFieldFactory;
import org.apache.geronimo.network.protocol.ProtocolException;
/**
* @version $Rev: 46019 $ $Date: 2004-09-14 04:56:06 -0500 (Tue, 14 Sep 2004) $
*/
public class MenuItemPacketFieldReader {
private static MenuItemPacketFieldReader ourInstance = new MenuItemPacketFieldReader();
protected Map factories = new HashMap();
public static MenuItemPacketFieldReader getInstance() {
return ourInstance;
}
public void register(byte key, PacketFieldFactory factory) {
factories.put(new Byte(key), factory);
}
/**
* We need to read from the same buffer so, we don't slice
*
* @param buffer the buffer to be read to obtain the field
* @return the field in for from of a packet
* @throws ProtocolException
*/
public PacketField read(ByteBuffer buffer) throws ProtocolException {
Byte key = new Byte(buffer.get());
PacketFieldFactory factory = (PacketFieldFactory) factories.get(key);
if (factory == null) throw new ProtocolException("No factory registered for " + key);
return factory.create(buffer);
}
private MenuItemPacketFieldReader() {
register(MenuItem.CREATE, new CreateInstanceMenuItem());
register(MenuItem.ATTRIBUTE, new SetAttributeMenuItem());
register(MenuItem.REFERENCE, new SetReferenceMenuItem());
}
}