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.camel.spring.util;
018    
019    import org.aopalliance.intercept.MethodInvocation;
020    import org.apache.camel.Exchange;
021    import org.apache.camel.Expression;
022    
023    import java.lang.reflect.AccessibleObject;
024    import java.lang.reflect.InvocationTargetException;
025    import java.lang.reflect.Method;
026    
027    /**
028     * @version $Revision: $
029     */
030    public class MethodInfo {
031        private Class type;
032        private Method method;
033        private Expression parametersExpression;
034    
035        public MethodInfo(Class type, Method method, Expression parametersExpression) {
036            this.type = type;
037            this.method = method;
038            this.parametersExpression = parametersExpression;
039        }
040    
041        public MethodInvocation createMethodInvocation(final Object pojo, final Exchange messageExchange) {
042            final Object[] arguments = (Object[]) parametersExpression.evaluate(messageExchange);
043            return new MethodInvocation() {
044                public Method getMethod() {
045                    return method;
046                }
047    
048                public Object[] getArguments() {
049                    return arguments;
050                }
051    
052                public Object proceed() throws Throwable {
053                    return invoke(method, pojo, arguments, messageExchange);
054                }
055    
056                public Object getThis() {
057                    return pojo;
058                }
059    
060                public AccessibleObject getStaticPart() {
061                    return method;
062                }
063            };
064        }
065    
066        public Class getType() {
067            return type;
068        }
069    
070        public Method getMethod() {
071            return method;
072        }
073    
074        public Expression getParametersExpression() {
075            return parametersExpression;
076        }
077    
078        protected Object invoke(Method mth, Object pojo, Object[] arguments, Exchange exchange) throws IllegalAccessException, InvocationTargetException {
079            return mth.invoke(pojo, arguments);
080        }
081    }