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 java.util.Map;
020    import java.util.concurrent.ConcurrentHashMap;
021    
022    import org.aopalliance.intercept.MethodInvocation;
023    import org.apache.camel.Expression;
024    import org.apache.camel.Exchange;
025    import org.apache.camel.Endpoint;
026    import org.apache.camel.RuntimeCamelException;
027    import org.apache.camel.Message;
028    import org.apache.camel.builder.ExpressionBuilder;
029    
030    /**
031     * Represents the strategy used to figure out how to map a message exchange to a POJO method invocation
032     *
033     * @version $Revision:$
034     */
035    public class DefaultMethodInvocationStrategy implements MethodInvocationStrategy {
036    
037        private Map<Class, Expression> parameterTypeToExpressionMap = new ConcurrentHashMap<Class, Expression>();
038    
039        public DefaultMethodInvocationStrategy() {
040        }
041    
042        public synchronized Expression getDefaultParameterTypeExpression(Class parameterType) {
043            return parameterTypeToExpressionMap.get(parameterType);
044        }
045    
046        /**
047         * Adds a default parameter type mapping to an expression
048         */
049        public synchronized void addParameterMapping(Class parameterType, Expression expression) {
050            parameterTypeToExpressionMap.put(parameterType, expression);
051        }
052    
053    
054        /**
055         * Creates an invocation on the given POJO using annotations to decide which method to invoke
056         * and to figure out which parameters to use
057         */
058    /*
059        public MethodInvocation createInvocation(Object pojo,
060                                                 BeanInfo beanInfo, 
061                                                 Exchange messageExchange,
062                                                 Endpoint pojoEndpoint) throws RuntimeCamelException {
063            return beanInfo.createInvocation(pojo, messageExchange);
064        }
065    */
066    
067    
068        public void loadDefaultRegistry() {
069            addParameterMapping(Exchange.class, ExpressionBuilder.exchangeExpression());
070            addParameterMapping(Message.class, ExpressionBuilder.inMessageExpression());
071        }
072    
073    
074    }