1 /* 2 * $Id: ObjectToXml.java 10086 2007-12-14 10:25:20Z holger $ 3 * -------------------------------------------------------------------------------------- 4 * Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.com 5 * 6 * The software in this package is published under the terms of the CPAL v1.0 7 * license, a copy of which has been included with this distribution in the 8 * LICENSE.txt file. 9 */ 10 11 package org.mule.transformers.xml; 12 13 import org.mule.umo.UMOEventContext; 14 import org.mule.umo.UMOMessage; 15 import org.mule.umo.transformer.TransformerException; 16 17 /** 18 * <code>ObjectToXml</code> converts any object to XML using Xstream. Xstream uses 19 * some clever tricks so objects that get marshalled to XML do not need to implement 20 * any interfaces including Serializable and you don't even need to specify a default 21 * constructor. If <code>UMOMessage</code> is configured as a source type on this 22 * transformer by calling <code>setAcceptUMOMessage(true)</code> then the UMOMessage 23 * will be serialised. This is useful for transports such as TCP where the message 24 * headers would normally be lost. 25 */ 26 27 public class ObjectToXml extends AbstractXStreamTransformer 28 { 29 30 public ObjectToXml() 31 { 32 this.registerSourceType(Object.class); 33 this.setReturnClass(String.class); 34 } 35 36 public boolean isAcceptUMOMessage() 37 { 38 return this.isSourceTypeSupported(UMOMessage.class, true); 39 } 40 41 public void setAcceptUMOMessage(boolean value) 42 { 43 if (value) 44 { 45 this.registerSourceType(UMOMessage.class); 46 } 47 else 48 { 49 this.unregisterSourceType(UMOMessage.class); 50 } 51 } 52 53 public Object transform(Object src, String encoding, UMOEventContext context) throws TransformerException 54 { 55 /* 56 * If the UMOMessage source type has been registered that we can assume that 57 * the whole message is to be serialised to Xml, not just the payload. This 58 * can be useful for protocols such as tcp where the protocol does not 59 * support headers, thus the whole messgae needs to be serialized 60 */ 61 if (this.isAcceptUMOMessage() && context != null) 62 { 63 src = context.getMessage(); 64 } 65 66 return this.getXStream().toXML(src); 67 } 68 }