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.lang.reflect.Method; 020 021import org.apache.camel.Endpoint; 022import org.apache.camel.ExchangePattern; 023import org.apache.camel.Producer; 024import org.apache.camel.RuntimeCamelException; 025 026/** 027 * Special {@link java.lang.reflect.InvocationHandler} for methods that have only one parameter. This 028 * parameter is directly sent to as the body of the message. The idea is to use 029 * that as a very open message format especially when combined with e.g. JAXB 030 * serialization. 031 */ 032public class PojoMessageInvocationHandler extends AbstractCamelInvocationHandler { 033 034 public PojoMessageInvocationHandler(Endpoint endpoint, Producer producer) { 035 super(endpoint, producer); 036 } 037 038 @Override 039 public Object doInvokeProxy(Object proxy, Method method, Object[] args) throws Throwable { 040 int argsLength = (args == null) ? 0 : args.length; 041 if (argsLength != 1) { 042 throw new RuntimeCamelException(String.format("Error creating proxy for %s.%s Number of arguments must be 1 but is %d", 043 method.getDeclaringClass().getName(), 044 method.getName(), argsLength)); 045 } 046 final ExchangePattern pattern = method.getReturnType() != Void.TYPE ? ExchangePattern.InOut : ExchangePattern.InOnly; 047 return invokeWithBody(method, args[0], pattern); 048 } 049 050}