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     */
017    package org.apache.servicemix.bean.support;
018    
019    import java.lang.reflect.AccessibleObject;
020    import java.lang.reflect.InvocationTargetException;
021    import java.lang.reflect.Method;
022    
023    import javax.jbi.messaging.MessageExchange;
024    import javax.jbi.messaging.MessagingException;
025    
026    import org.aopalliance.intercept.MethodInvocation;
027    import org.apache.servicemix.expression.Expression;
028    
029    /**
030     * @version $Revision: $
031     */
032    public class MethodInfo {
033        
034        private final Method method;
035        private final Expression parametersExpression;
036    
037        public MethodInfo(Method method, Expression parametersExpression) {
038            this.method = method;
039            this.parametersExpression = parametersExpression;
040        }
041    
042    
043        public MethodInvocation createMethodInvocation(final Object pojo, 
044                final MessageExchange messageExchange) throws MessagingException {
045            final Object[] arguments = (Object[]) parametersExpression.evaluate(
046                    messageExchange, messageExchange.getMessage("in"));
047            return new MethodInvocation() {
048                public Method getMethod() {
049                    return method;
050                }
051                public Object[] getArguments() {
052                    return arguments;
053                }
054                public Object proceed() throws Throwable {
055                    return invoke(method, pojo, arguments, messageExchange);
056                }
057                public Object getThis() {
058                    return pojo;
059                }
060                public AccessibleObject getStaticPart() {
061                    return method;
062                }
063            };
064    
065        }
066    
067        protected Object invoke(Method mth, Object pojo, Object[] arguments, 
068                MessageExchange exchange) throws IllegalAccessException, InvocationTargetException {
069            return mth.invoke(pojo, arguments);
070        }
071    }