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.CamelContext;
023    import org.apache.camel.Exchange;
024    import org.apache.camel.Expression;
025    import org.apache.camel.Message;
026    import org.apache.camel.TypeConverter;
027    import org.apache.camel.builder.ExpressionBuilder;
028    import org.apache.camel.spi.Registry;
029    
030    /**
031     * Represents the strategy used to figure out how to map a message exchange to a POJO method invocation
032     *
033     * @version 
034     */
035    public class DefaultParameterMappingStrategy implements ParameterMappingStrategy {
036        private final Map<Class<?>, Expression> parameterTypeToExpressionMap = new ConcurrentHashMap<Class<?>, Expression>();
037    
038        public DefaultParameterMappingStrategy() {
039            loadDefaultRegistry();
040        }
041    
042        public 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 void addParameterMapping(Class<?> parameterType, Expression expression) {
050            parameterTypeToExpressionMap.put(parameterType, expression);
051        }
052    
053        public void loadDefaultRegistry() {
054            addParameterMapping(Exchange.class, ExpressionBuilder.exchangeExpression());
055            addParameterMapping(Message.class, ExpressionBuilder.inMessageExpression());
056            addParameterMapping(Exception.class, ExpressionBuilder.exchangeExceptionExpression());
057            addParameterMapping(TypeConverter.class, ExpressionBuilder.typeConverterExpression());
058            addParameterMapping(Registry.class, ExpressionBuilder.registryExpression());
059            addParameterMapping(CamelContext.class, ExpressionBuilder.camelContextExpression());
060        }
061    }