/*
* 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.mina.statemachine.context;
import org.apache.mina.core.session.IoSession;
/**
* MINA specific {@link StateContextLookup} which uses an {@link IoSession}
* attribute to store the {@link StateContextLookup}.
*
* @author The Apache MINA Project (dev@mina.apache.org)
* @version $Rev: 671827 $, $Date: 2008-06-26 10:49:48 +0200 (Thu, 26 Jun 2008) $
*/
public class IoSessionStateContextLookup extends AbstractStateContextLookup {
/**
* The default name of the {@link IoSession} attribute used to store the
* {@link StateContext} object.
*/
public static final String DEFAULT_SESSION_ATTRIBUTE_NAME =
IoSessionStateContextLookup.class.getName() + ".stateContext";
private final String sessionAttributeName;
/**
* Creates a new instance using a {@link DefaultStateContextFactory} to
* create {@link StateContext} objects for new {@link IoSession}s.
*/
public IoSessionStateContextLookup() {
this(new DefaultStateContextFactory(), DEFAULT_SESSION_ATTRIBUTE_NAME);
}
/**
* Creates a new instance using a {@link DefaultStateContextFactory} to
* create {@link StateContext} objects for new {@link IoSession}s.
*
* @param sessionAttributeName the name of the {@link IoSession} attribute
* used to store the {@link StateContext} object.
*/
public IoSessionStateContextLookup(String sessionAttributeName) {
this(new DefaultStateContextFactory(), sessionAttributeName);
}
/**
* Creates a new instance using the specified {@link StateContextFactory} to
* create {@link StateContext} objects for new {@link IoSession}s.
*
* @param contextFactory the {@link StateContextFactory}.
*/
public IoSessionStateContextLookup(StateContextFactory contextFactory) {
this(contextFactory, DEFAULT_SESSION_ATTRIBUTE_NAME);
}
/**
* Creates a new instance using the specified {@link StateContextFactory} to
* create {@link StateContext} objects for new {@link IoSession}s.
*
* @param contextFactory the {@link StateContextFactory}.
* @param sessionAttributeName the name of the {@link IoSession} attribute
* used to store the {@link StateContext} object.
*/
public IoSessionStateContextLookup(StateContextFactory contextFactory, String sessionAttributeName) {
super(contextFactory);
this.sessionAttributeName = sessionAttributeName;
}
protected StateContext lookup(Object eventArg) {
IoSession session = (IoSession) eventArg;
return (StateContext) session.getAttribute(sessionAttributeName);
}
protected void store(Object eventArg, StateContext context) {
IoSession session = (IoSession) eventArg;
session.setAttribute(sessionAttributeName, context);
}
protected boolean supports(Class<?> c) {
return IoSession.class.isAssignableFrom(c);
}
}