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.component.bean;
018    
019    import java.util.Map;
020    import java.util.concurrent.ConcurrentHashMap;
021    
022    import org.apache.camel.Exchange;
023    import org.apache.camel.Expression;
024    import org.apache.camel.Message;
025    import org.apache.camel.builder.ExpressionBuilder;
026    
027    /**
028     * Represents the strategy used to figure out how to map a message exchange to a POJO method invocation
029     *
030     * @version $Revision: 35332 $
031     */
032    public class DefaultParameterMappingStrategy implements ParameterMappingStrategy {
033        private Map<Class, Expression> parameterTypeToExpressionMap = new ConcurrentHashMap<Class, Expression>();
034    
035        public DefaultParameterMappingStrategy() {
036            loadDefaultRegistry();
037        }
038    
039        public synchronized Expression getDefaultParameterTypeExpression(Class parameterType) {
040            return parameterTypeToExpressionMap.get(parameterType);
041        }
042    
043        /**
044         * Adds a default parameter type mapping to an expression
045         */
046        public synchronized void addParameterMapping(Class parameterType, Expression expression) {
047            parameterTypeToExpressionMap.put(parameterType, expression);
048        }
049    
050        /**
051         * Creates an invocation on the given POJO using annotations to decide which method to invoke
052         * and to figure out which parameters to use
053         */
054    /*
055        public MethodInvocation createInvocation(Object pojo,
056                                                 BeanInfo beanInfo, 
057                                                 Exchange messageExchange,
058                                                 Endpoint pojoEndpoint) throws RuntimeCamelException {
059            return beanInfo.createInvocation(pojo, messageExchange);
060        }
061    */
062        public void loadDefaultRegistry() {
063            addParameterMapping(Exchange.class, ExpressionBuilder.exchangeExpression());
064            addParameterMapping(Message.class, ExpressionBuilder.inMessageExpression());
065        }
066    }