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.util.Map;
020 import java.util.concurrent.ConcurrentHashMap;
021
022 import javax.jbi.messaging.MessageExchange;
023 import javax.jbi.messaging.MessagingException;
024 import javax.jbi.messaging.NormalizedMessage;
025 import javax.xml.transform.Source;
026
027 import org.aopalliance.intercept.MethodInvocation;
028 import org.apache.servicemix.bean.BeanEndpoint;
029 import org.apache.servicemix.expression.Expression;
030
031 /**
032 * Represents the strategy used to figure out how to map a JBI message exchange to a POJO method invocation
033 *
034 * @version $Revision: $
035 * @org.apache.xbean.XBean element="defaultMethodInvocationStrategy"
036 * description="The default strategy for invoking methods on POJOs from a JBI message exchange"
037 */
038 public class DefaultMethodInvocationStrategy implements MethodInvocationStrategy {
039
040 private Map<Class, Expression> parameterTypeToExpressionMap = new ConcurrentHashMap<Class, Expression>();
041
042 public DefaultMethodInvocationStrategy() {
043 }
044
045
046 public Expression getDefaultParameterTypeExpression(Class parameterType) {
047 return parameterTypeToExpressionMap.get(parameterType);
048 }
049
050 /**
051 * Adds a default parameter type mapping to an expression
052 */
053 public void addParameterMapping(Class parameterType, Expression expression) {
054 parameterTypeToExpressionMap.put(parameterType, expression);
055 }
056
057
058 /**
059 * Creates an invocation on the given POJO using annotations to decide which method to invoke
060 * and to figure out which parameters to use
061 */
062 public MethodInvocation createInvocation(Object pojo,
063 BeanInfo beanInfo,
064 MessageExchange messageExchange,
065 BeanEndpoint pojoEndpoint) throws MessagingException {
066 return beanInfo.createInvocation(pojo, messageExchange);
067 }
068
069
070 public void loadDefaultRegistry() {
071 addParameterMapping(MessageExchange.class, new Expression() {
072 public Object evaluate(MessageExchange messageExchange, NormalizedMessage normalizedMessage)
073 throws MessagingException {
074 return messageExchange;
075 }
076 });
077
078 addParameterMapping(NormalizedMessage.class, new Expression() {
079 public Object evaluate(MessageExchange messageExchange, NormalizedMessage normalizedMessage)
080 throws MessagingException {
081 return normalizedMessage;
082 }
083 });
084
085 addParameterMapping(Source.class, new Expression() {
086 public Object evaluate(MessageExchange messageExchange, NormalizedMessage normalizedMessage)
087 throws MessagingException {
088 return normalizedMessage.getContent();
089 }
090 });
091 }
092
093
094 }