//
// ========================================================================
// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.websocket.jsr356;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.websocket.MessageHandler;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.websocket.common.util.ReflectUtils;
import org.eclipse.jetty.websocket.jsr356.metadata.MessageHandlerMetadata;
/**
* Factory for {@link MessageHandlerMetadata}
*/
public class MessageHandlerFactory
{
private static final Logger LOG = Log.getLogger(MessageHandlerFactory.class);
/** Registered MessageHandlers at this level */
private Map<Class<? extends MessageHandler>, List<MessageHandlerMetadata>> registered;
public MessageHandlerFactory()
{
registered = new ConcurrentHashMap<>();
}
public List<MessageHandlerMetadata> getMetadata(Class<? extends MessageHandler> handler) throws IllegalStateException
{
if (LOG.isDebugEnabled())
{
LOG.debug("getMetadata({})",handler);
}
List<MessageHandlerMetadata> ret = registered.get(handler);
if (ret != null)
{
return ret;
}
return register(handler);
}
public List<MessageHandlerMetadata> register(Class<? extends MessageHandler> handler)
{
List<MessageHandlerMetadata> metadatas = new ArrayList<>();
boolean partial = false;
if (MessageHandler.Partial.class.isAssignableFrom(handler))
{
if (LOG.isDebugEnabled())
{
LOG.debug("supports Partial: {}",handler);
}
partial = true;
Class<?> onMessageClass = ReflectUtils.findGenericClassFor(handler,MessageHandler.Partial.class);
if (LOG.isDebugEnabled())
{
LOG.debug("Partial message class: {}",onMessageClass);
}
metadatas.add(new MessageHandlerMetadata(handler,onMessageClass,partial));
}
if (MessageHandler.Whole.class.isAssignableFrom(handler))
{
if (LOG.isDebugEnabled())
{
LOG.debug("supports Whole: {}",handler.getName());
}
partial = false;
Class<?> onMessageClass = ReflectUtils.findGenericClassFor(handler,MessageHandler.Whole.class);
if (LOG.isDebugEnabled())
{
LOG.debug("Whole message class: {}",onMessageClass);
}
metadatas.add(new MessageHandlerMetadata(handler,onMessageClass,partial));
}
registered.put(handler,metadatas);
return metadatas;
}
}