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 */
017package org.apache.camel.component.bean;
018
019import java.util.Map;
020import java.util.concurrent.ConcurrentHashMap;
021
022import org.apache.camel.CamelContext;
023import org.apache.camel.Exchange;
024import org.apache.camel.Expression;
025import org.apache.camel.Message;
026import org.apache.camel.TypeConverter;
027import org.apache.camel.builder.ExpressionBuilder;
028import 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 */
035public 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}