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.language.bean; 018 019 import org.apache.camel.Exchange; 020 import org.apache.camel.component.bean.BeanProcessor; 021 import org.apache.camel.component.bean.RegistryBean; 022 import org.apache.camel.impl.ExpressionSupport; 023 024 /** 025 * Evaluates an expression using a bean method invocation 026 * 027 * @version $Revision: 36321 $ 028 */ 029 public class BeanExpression<E extends Exchange> extends ExpressionSupport<E> { 030 private String beanName; 031 private String method; 032 033 public BeanExpression(String beanName, String method) { 034 this.beanName = beanName; 035 this.method = method; 036 } 037 038 @Override 039 public String toString() { 040 return "BeanExpression[bean: " + beanName + " method: " + method + "]"; 041 } 042 043 protected String assertionFailureMessage(E exchange) { 044 return "bean: " + beanName + " method: " + method; 045 } 046 047 public Object evaluate(E exchange) { 048 BeanProcessor processor = new BeanProcessor(new RegistryBean(exchange.getContext(), beanName)); 049 if (method != null) { 050 processor.setMethod(method); 051 } 052 try { 053 Exchange newExchange = exchange.copy(); 054 processor.process(newExchange); 055 return newExchange.getOut(true).getBody(); 056 } catch (Exception e) { 057 throw new RuntimeBeanExpressionException(exchange, beanName, method, e); 058 } 059 } 060 }