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.processor; 018 019 import org.apache.camel.Exchange; 020 import org.apache.camel.Message; 021 import org.apache.camel.Processor; 022 import org.apache.camel.impl.DefaultMessage; 023 import org.apache.camel.support.ServiceSupport; 024 import org.apache.camel.util.IOHelper; 025 import org.apache.camel.util.ObjectHelper; 026 027 /** 028 * A processor which converts the payload of the input message to be of the given type 029 * <p/> 030 * If the conversion fails an {@link org.apache.camel.InvalidPayloadException} is thrown. 031 * 032 * @version 033 */ 034 public class ConvertBodyProcessor extends ServiceSupport implements Processor { 035 private final Class<?> type; 036 private final String charset; 037 038 public ConvertBodyProcessor(Class<?> type) { 039 ObjectHelper.notNull(type, "type", this); 040 this.type = type; 041 this.charset = null; 042 } 043 044 public ConvertBodyProcessor(Class<?> type, String charset) { 045 ObjectHelper.notNull(type, "type", this); 046 this.type = type; 047 this.charset = IOHelper.normalizeCharset(charset); 048 } 049 050 @Override 051 public String toString() { 052 return "convertBodyTo[" + type.getCanonicalName() + "]"; 053 } 054 055 public void process(Exchange exchange) throws Exception { 056 Message in = exchange.getIn(); 057 if (in.getBody() == null) { 058 // only convert if the is a body 059 return; 060 } 061 062 if (charset != null) { 063 // override existing charset with configured charset as that is what the user 064 // have explicit configured and expects to be used 065 exchange.setProperty(Exchange.CHARSET_NAME, charset); 066 } 067 // use mandatory conversion 068 Object value = in.getMandatoryBody(type); 069 070 // create a new message container so we do not drag specialized message objects along 071 Message msg = new DefaultMessage(); 072 msg.copyFrom(in); 073 msg.setBody(value); 074 075 if (exchange.getPattern().isOutCapable()) { 076 exchange.setOut(msg); 077 } else { 078 exchange.setIn(msg); 079 } 080 081 // remove charset when we are done as we should not propagate that, 082 // as that can lead to double converting later on 083 if (charset != null) { 084 exchange.removeProperty(Exchange.CHARSET_NAME); 085 } 086 } 087 088 public Class<?> getType() { 089 return type; 090 } 091 092 @Override 093 protected void doStart() throws Exception { 094 // noop 095 } 096 097 @Override 098 protected void doStop() throws Exception { 099 // noop 100 } 101 }