01: /*
02: * $Id: XmlToObject.java 11336 2008-03-12 17:53:18Z dirk.olmes $
03: * --------------------------------------------------------------------------------------
04: * Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.com
05: *
06: * The software in this package is published under the terms of the CPAL v1.0
07: * license, a copy of which has been included with this distribution in the
08: * LICENSE.txt file.
09: */
10:
11: package org.mule.module.xml.transformer;
12:
13: import org.mule.api.MuleMessage;
14: import org.mule.api.transformer.TransformerException;
15:
16: import java.io.ByteArrayInputStream;
17: import java.io.IOException;
18: import java.io.InputStream;
19: import java.io.InputStreamReader;
20: import java.io.Reader;
21: import java.io.UnsupportedEncodingException;
22:
23: /**
24: * <code>XmlToObject</code> converts xml created by the ObjectToXml transformer in to a
25: * java object graph. This transformer uses XStream. Xstream uses some clever tricks so
26: * objects that get marshalled to XML do not need to implement any interfaces including
27: * Serializable and you don't even need to specify a default constructor.
28: *
29: * @see org.mule.transformer.xml.ObjectToXml
30: */
31:
32: public class XmlToObject extends AbstractXStreamTransformer {
33:
34: private final DomDocumentToXml domTransformer = new DomDocumentToXml();
35:
36: public XmlToObject() {
37: registerSourceType(String.class);
38: registerSourceType(byte[].class);
39: registerSourceType(InputStream.class);
40: registerSourceType(org.w3c.dom.Document.class);
41: registerSourceType(org.dom4j.Document.class);
42: setReturnClass(Object.class);
43: }
44:
45: public Object transform(MuleMessage message, String outputEncoding)
46: throws TransformerException {
47: Object src = message.getPayload();
48: if (src instanceof byte[]) {
49: try {
50: Reader xml = new InputStreamReader(
51: new ByteArrayInputStream((byte[]) src),
52: outputEncoding);
53: return getXStream().fromXML(xml);
54: } catch (UnsupportedEncodingException uee) {
55: throw new TransformerException(this , uee);
56: }
57: } else if (src instanceof InputStream) {
58: InputStream input = (InputStream) src;
59: try {
60: Reader xml = new InputStreamReader(input,
61: outputEncoding);
62: return getXStream().fromXML(xml);
63: } catch (UnsupportedEncodingException uee) {
64: throw new TransformerException(this , uee);
65: } finally {
66: try {
67: input.close();
68: } catch (IOException e) {
69: logger.warn("Exception closing stream: ", e);
70: }
71: }
72: } else if (src instanceof String) {
73: return getXStream().fromXML(src.toString());
74: } else {
75: return getXStream().fromXML(
76: (String) domTransformer.transform(src));
77: }
78: }
79:
80: }
|