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.processor.aggregate; 018 019import java.lang.reflect.Method; 020import java.util.ArrayList; 021import java.util.List; 022 023import org.apache.camel.CamelContext; 024import org.apache.camel.Exchange; 025import org.apache.camel.component.bean.ParameterInfo; 026 027/** 028 * Method information about the POJO method to call when using the {@link AggregationStrategyBeanAdapter}. 029 */ 030public class AggregationStrategyMethodInfo { 031 032 private final Method method; 033 private final List<ParameterInfo> oldParameters; 034 private final List<ParameterInfo> newParameters; 035 036 037 @Deprecated 038 public AggregationStrategyMethodInfo(CamelContext camelContext, Class<?> type, Method method, 039 List<ParameterInfo> oldParameters, List<ParameterInfo> newParameters) { 040 this(method, oldParameters, newParameters); 041 } 042 public AggregationStrategyMethodInfo(Method method, 043 List<ParameterInfo> oldParameters, 044 List<ParameterInfo> newParameters) { 045 this.method = method; 046 this.oldParameters = oldParameters; 047 this.newParameters = newParameters; 048 } 049 050 public Object invoke(Object pojo, Exchange oldExchange, Exchange newExchange) throws Exception { 051 // evaluate the parameters 052 List<Object> list = new ArrayList<>(oldParameters.size() + newParameters.size()); 053 for (ParameterInfo info : oldParameters) { 054 if (oldExchange != null) { 055 Object value = info.getExpression().evaluate(oldExchange, info.getType()); 056 list.add(value); 057 } else { 058 // use a null value as oldExchange is null 059 list.add(null); 060 } 061 } 062 for (ParameterInfo info : newParameters) { 063 if (newExchange != null) { 064 Object value = info.getExpression().evaluate(newExchange, info.getType()); 065 list.add(value); 066 } else { 067 // use a null value as newExchange is null 068 list.add(null); 069 } 070 } 071 072 Object[] args = list.toArray(); 073 return method.invoke(pojo, args); 074 } 075}