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1
9
10 package org.dom4j.samples;
11
12 import org.dom4j.Document;
13 import org.dom4j.DocumentException;
14 import org.dom4j.io.OutputFormat;
15 import org.dom4j.io.XMLWriter;
16
17
23 public abstract class AbstractDemo {
24
25
26 protected OutputFormat format = new OutputFormat();
27
28
29 protected XMLWriter writer;
30
31 public AbstractDemo() {
32 }
33
34 protected static void run(AbstractDemo demo, String  [] args) {
35 try {
36 demo.run(args);
37 } catch (DocumentException e) {
38 System.out.println("Exception occurred: " + e);
39 Throwable nestedException = e.getNestedException();
40 if (nestedException != null) {
41 System.out.println("NestedException: " + nestedException);
42 nestedException.printStackTrace();
43 } else {
44 e.printStackTrace();
45 }
46 } catch (Throwable t) {
47 System.out.println("Exception occurred: " + t);
48 t.printStackTrace();
49 }
50 }
51
52 public void run(String [] args) throws Exception {
53 if (args.length < 1) {
54 printUsage("no XML document URL specified");
55 return;
56 }
57
58 int idx = format.parseOptions(args, 0);
59 if (idx >= args.length) {
60 printUsage("no XML document URL specified");
61 return;
62 } else {
63 writer = createXMLWriter();
64
65 Document document = parse(args[idx]);
66 process(document);
67 }
68 }
69
70 protected Document parse(String xmlFile) throws Exception {
71 throw new RuntimeException (
72 "parse(String xmlFile) not implemented in this demo");
73 }
74
75 protected void process(Document document) throws Exception {
76 getXMLWriter().write(document);
77 getXMLWriter().flush();
78 }
79
80 protected void print(String text) {
81 System.out.print(text);
82 }
83
84 protected void println(String text) {
85 System.out.println(text);
86 }
87
88 protected void printUsage(String text) {
89 println("Usage: java " + getClass().getName() + " " + text);
90 }
91
92 protected XMLWriter getXMLWriter() throws Exception {
93 if (writer == null) {
94 writer = createXMLWriter();
95 }
96 return writer;
97 }
98
99
103 protected XMLWriter createXMLWriter() throws Exception {
104 return new XMLWriter(System.out, format);
105 }
106
107 }
108
109
147 |
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