001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 * 
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 * 
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.mina.integration.ognl;
018
019import java.util.Map;
020import java.util.TreeMap;
021
022import ognl.OgnlContext;
023import ognl.OgnlException;
024import ognl.OgnlRuntime;
025import ognl.PropertyAccessor;
026
027import org.apache.mina.core.session.IoSession;
028
029/**
030 * An OGNL {@link PropertyAccessor} for {@link IoSession}.
031 * 
032 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
033 */
034public class IoSessionPropertyAccessor extends AbstractPropertyAccessor {
035
036    @Override
037    protected Object getProperty0(OgnlContext context, Object target, String name) throws OgnlException {
038        if (target instanceof IoSession && "attributes".equals(name)) {
039            Map<String, Object> attributes = new TreeMap<String, Object>();
040            IoSession s = (IoSession) target;
041            for (Object key : s.getAttributeKeys()) {
042                Object value = s.getAttribute(key);
043                if (value == null) {
044                    continue;
045                }
046                attributes.put(String.valueOf(key), value);
047            }
048            return attributes;
049        }
050
051        return OgnlRuntime.NotFound;
052    }
053
054    @Override
055    protected boolean hasGetProperty0(OgnlContext context, Object target, String name) throws OgnlException {
056        return target instanceof IoSession && "attributes".equals(name);
057    }
058
059    @Override
060    protected boolean hasSetProperty0(OgnlContext context, Object target, String name) throws OgnlException {
061        return false;
062    }
063
064    @Override
065    protected Object setProperty0(OgnlContext context, Object target, String name, Object value) throws OgnlException {
066        return OgnlRuntime.NotFound;
067    }
068}