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1
9
10 package org.jboss.portal.format.template;
11
12 import java.io.File  ;
13 import java.io.FileNotFoundException ;
14 import java.io.FileReader ;
15 import java.io.IOException ;
16 import java.io.Reader ;
17 import java.io.StringReader ;
18 import java.util.LinkedList ;
19
20 import org.dom4j.Document;
21 import org.dom4j.DocumentFactory;
22 import org.dom4j.Element;
23
24
27 public final class TemplateParser
28 implements TemplateAnalyzerConstants
29 {
30
31 private Reader source;
32 private TemplateAnalyzerTokenManager analyzer;
33 private LinkedList stack = new LinkedList ();
34 private Document template;
35 private Element current;
36 private StringBuffer text = null;
37
38 public TemplateParser(File source) throws FileNotFoundException
39 {
40 this(new FileReader (source));
41 }
42
43 public TemplateParser(String source)
44 {
45 this(new StringReader (source));
46 }
47
48 public TemplateParser(Reader source)
49 {
50 this.source = source;
51 analyzer = new TemplateAnalyzerTokenManager(new ASCII_CharStream(source, 1, 1));
52 template = DocumentFactory.getInstance().createDocument();
53 current = template.addElement("node");
54 }
55
56
60 public Document parse() throws ParseException
61 {
62 while(true)
63 {
64 Token t = analyzer.getNextToken();
66
67 if (t.image.length() == 0)
68 {
69 if (text != null)
70 {
71 current.addText(text.toString());
72 text = null;
73 }
74
75 if (current != template.getRootElement())
77 {
78 throw new ParseException("An opening loop is not closed");
79 }
80 return template;
81 }
82
83 switch(t.kind)
84 {
85 case BEGIN:
86 if (text != null)
87 {
88 current.addText(text.toString());
89 text = null;
90 }
91 Element loop = current.addElement("loop");
92 loop.addAttribute("name", t.image.substring("<!-- BEGIN ".length(), t.image.length() - " -->".length()));
93 push(loop.addElement("node"));
94 break;
95
96 case END:
97 if (text != null)
98 {
99 current.addText(text.toString());
100 text = null;
101 }
102 if (!"node".equals(current.getName()))
103 {
104 throw new ParseException("Unexpected closing loop");
105 }
106 pop();
107 break;
112
113 case PROPERTY:
114 case TEXT:
115 if (text == null)
116 {
117 text = new StringBuffer ();
118 }
119 text.append(t.image);
120 break;
121 case NEWLINE:
122 if (text == null)
123 {
124 text = new StringBuffer ();
125 }
126 text.append("\n");
127 break;
128
129
130 case REF:
131 if (text != null)
132 {
133 current.addText(text.toString());
134 text = null;
135 }
136 Element ref = current.addElement("ref");
137 String tmp = t.image.substring(1, t.image.length() - 1);
138 int count = 0;
139 int previous = -1;
140 while (true)
141 {
142 int index = tmp.indexOf('.', previous + 1);
143 if (index == -1)
144 {
145 String name = tmp.substring(previous + 1);
146 ref.addAttribute("name", name);
147 break;
148 }
149 count++;
150 previous = index;
151 }
152 ref.addAttribute("depth", "" + count);
153 break;
154
155 default:
156 throw new ParseException("Unexpected token");
157 }
158 }
159 }
160
161 public void close()
162 {
163 try
164 {
165 source.close();
166 }
167 catch (IOException ignore)
168 {
169 }
171 }
172
173 private void push(Element node)
174 {
175 stack.addLast(current);
176 current = node;
177 }
178
179 private void pop()
180 {
181 current = (Element)stack.removeLast();
182 }
183
184 }
185 |
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