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1
9
10 package org.dom4j.samples.jaxp;
11
12 import org.dom4j.samples.SAXDemo;
13
14 import java.io.Reader  ;
15 import java.io.StringReader ;
16 import java.io.StringWriter ;
17 import java.io.Writer ;
18
19 import javax.xml.transform.Transformer ;
20 import javax.xml.transform.TransformerFactory ;
21 import javax.xml.transform.stream.StreamResult ;
22 import javax.xml.transform.stream.StreamSource ;
23
24 import org.dom4j.Document;
25 import org.dom4j.io.DocumentResult;
26 import org.dom4j.io.DocumentSource;
27 import org.dom4j.io.XMLWriter;
28
29
36 public class RoundTripDemo extends SAXDemo {
37
38 public static void main(String [] args) {
39 run(new RoundTripDemo(), args);
40 }
41
42 public RoundTripDemo() {
43 }
44
45 protected void outputDocument(Document document, Writer out) {
46 try {
47 TransformerFactory factory = TransformerFactory.newInstance();
48
49 Transformer transformer = factory.newTransformer();
50
51 StreamResult result = new StreamResult (out);
52 DocumentSource source = new DocumentSource(document);
53
54 transformer.transform(source, result);
55 } catch (Exception ex) {
56 ex.printStackTrace();
57 }
58
59 }
60
61 protected Document parseDocument(Reader in) {
62 try {
63 TransformerFactory factory = TransformerFactory.newInstance();
64
65 Transformer transformer = factory.newTransformer();
66
67 DocumentResult result = new DocumentResult();
68 StreamSource source = new StreamSource (in);
69
70 transformer.transform(source, result);
71
72 return result.getDocument();
73 } catch (Exception ex) {
74 ex.printStackTrace();
75 return null;
76 }
77
78 }
79
80
81 protected void process(Document document) throws Exception {
82
83 System.out.println("about to output: " + document);
84
85 StringWriter out = new StringWriter ();
86 outputDocument(document, out);
87
88 Document doc2 = parseDocument(new StringReader (out.toString()));
89
90 System.out.println("parsed back again: " + doc2);
91
92 System.out.println("Writing it out...");
93
94 XMLWriter writer = new XMLWriter(System.out);
95 writer.write(doc2);
96
97 }
98 }
99
100
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