Commit | Line | Data |
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a5e6bd24 FT |
1 | package dolda.jsvc.next; |
2 | ||
3 | import java.io.*; | |
4 | import java.util.*; | |
5 | import org.w3c.dom.*; | |
a5e6bd24 FT |
6 | |
7 | public class Parser { | |
7c0e72ac | 8 | public class State { |
816cbb00 | 9 | public final Document doc = DomUtil.document(null, "dummy"); |
7c0e72ac FT |
10 | public final PeekReader in; |
11 | ||
12 | private State(Reader in) { | |
13 | this.in = new PeekReader(in); | |
14 | } | |
15 | } | |
16 | ||
a5e6bd24 FT |
17 | private static boolean namechar(char c) { |
18 | return((c == ':') || (c == '_') || (c == '$') || (c == '.') || (c == '-') || ((c >= '0') && (c <= '9')) || ((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z'))); | |
19 | } | |
20 | ||
21 | protected String entity(String name) { | |
22 | if(name.equals("amp")) | |
23 | return("&"); | |
24 | if(name.equals("lt")) | |
25 | return("<"); | |
26 | if(name.equals("gt")) | |
27 | return(">"); | |
28 | if(name.equals("apos")) | |
29 | return("'"); | |
30 | if(name.equals("quot")) | |
31 | return("\""); | |
32 | return(null); | |
33 | } | |
34 | ||
35 | protected Element makenode(Document doc, String name) { | |
36 | return(doc.createElementNS(null, name)); | |
37 | } | |
38 | ||
7c0e72ac FT |
39 | protected Attr makeattr(Document doc, Element el, String name, String val) { |
40 | Attr a = doc.createAttributeNS(el.getNamespaceURI(), name); | |
41 | a.setValue(val); | |
42 | return(a); | |
43 | } | |
44 | ||
a5e6bd24 FT |
45 | protected Attr makeattr(Document doc, Element el, String name) { |
46 | return(doc.createAttributeNS(el.getNamespaceURI(), name)); | |
47 | } | |
48 | ||
7c0e72ac | 49 | protected String name(State s) throws IOException { |
a5e6bd24 | 50 | StringBuilder buf = new StringBuilder(); |
a5e6bd24 | 51 | while(true) { |
7c0e72ac FT |
52 | int c = s.in.peek(); |
53 | if(c < 0) { | |
54 | break; | |
55 | } else if(namechar((char)c)) { | |
56 | buf.append((char)s.in.read()); | |
57 | } else { | |
58 | break; | |
59 | } | |
60 | } | |
61 | if(buf.length() == 0) | |
62 | throw(new ParseException("Expected name, got `" + printable(s.in.peek()) + "'")); | |
63 | return(buf.toString()); | |
64 | } | |
65 | ||
66 | protected String entity(State s) throws IOException { | |
67 | int c = s.in.read(); | |
68 | if(c != '&') | |
69 | throw(new ParseException("Expected `&' while reading entity, got `" + printable(c) + "'")); | |
70 | String nm = name(s); | |
71 | c = s.in.read(); | |
72 | if(c != ';') | |
73 | throw(new ParseException("Expected `;' while reading entity, got `" + printable(c) + "'")); | |
74 | return(entity(nm)); | |
75 | } | |
76 | ||
77 | protected Attr attribute(State s, Element el) throws IOException { | |
78 | String nm = name(s); | |
79 | s.in.peek(true); | |
80 | int c = s.in.read(); | |
81 | if(c != '=') | |
82 | throw(new ParseException("Expected `=' while reading attribute, got `" + printable(c) + "'")); | |
83 | s.in.peek(true); | |
84 | int qt = s.in.read(); | |
85 | if((qt != '"') && (qt != '\'')) | |
86 | throw(new ParseException("Expected double or single quote while reading attribute, got `" + printable(qt) + "'")); | |
87 | StringBuilder buf = new StringBuilder(); | |
88 | while(true) { | |
89 | c = s.in.peek(); | |
90 | if(c < 0) { | |
91 | throw(new ParseException("Unexpected end-of-file while reading attribute value")); | |
92 | } else if(c == qt) { | |
93 | s.in.read(); | |
94 | break; | |
95 | } else if(c == '&') { | |
96 | buf.append(entity(s)); | |
97 | } else { | |
98 | buf.append((char)s.in.read()); | |
99 | } | |
100 | } | |
101 | return(makeattr(s.doc, el, nm, buf.toString())); | |
102 | } | |
103 | ||
104 | protected Element element(State s) throws IOException { | |
105 | Element n = makenode(s.doc, name(s)); | |
106 | while(true) { | |
107 | int c = s.in.peek(true); | |
108 | if(c < 0) { | |
109 | throw(new ParseException("Unexpected end-of-file while parsing start tag")); | |
110 | } else if(c == '>') { | |
111 | s.in.read(); | |
112 | break; | |
113 | } else if(c == '/') { | |
114 | s.in.read(); | |
115 | s.in.peek(true); | |
116 | c = s.in.read(); | |
117 | if(c != '>') | |
118 | throw(new ParseException("Unexpected character `" + printable(c) + "' encountered in end of empty tag")); | |
119 | return(n); | |
120 | } else if(namechar((char)c)) { | |
121 | n.setAttributeNodeNS(attribute(s, n)); | |
122 | } else { | |
123 | throw(new ParseException("Unexpected character `" + printable(c) + "' encountered in start tag")); | |
124 | } | |
125 | } | |
126 | while(true) { | |
127 | int c = s.in.peek(); | |
128 | if(c < 0) { | |
129 | break; | |
130 | } else if(c == '<') { | |
131 | s.in.read(); | |
132 | c = s.in.peek(true); | |
133 | if(c == '/') { | |
134 | s.in.read(); | |
135 | s.in.peek(true); | |
136 | String nm = name(s); | |
137 | if(!nm.equals(n.getTagName())) | |
138 | throw(new ParseException("Unexpected end tag for `" + nm + "' while parsing `" + n.getTagName() + "'")); | |
139 | if(s.in.peek(true) != '>') | |
140 | throw(new ParseException("Expected `>' while reading end tag, got `" + printable(c) + "'")); | |
141 | s.in.read(); | |
142 | break; | |
a5e6bd24 | 143 | } else { |
7c0e72ac | 144 | n.appendChild(stag(s)); |
a5e6bd24 | 145 | } |
7c0e72ac FT |
146 | } else { |
147 | n.appendChild(text(s)); | |
148 | } | |
149 | } | |
150 | return(n); | |
151 | } | |
152 | ||
153 | protected Comment comment(State s) throws IOException { | |
154 | if((s.in.read() != '!') || | |
155 | (s.in.read() != '-') || | |
156 | (s.in.read() != '-')) | |
157 | throw(new ParseException("Illegal start of comment")); | |
158 | StringBuilder buf = new StringBuilder(); | |
159 | while(true) { | |
160 | int c = s.in.peek(); | |
161 | if(c < 0) { | |
162 | throw(new ParseException("Unexpected end-of-file while parsing comment")); | |
163 | } else if(c == '-') { | |
164 | s.in.read(); | |
165 | if(s.in.peek() == '-') { | |
166 | s.in.read(); | |
167 | if(s.in.peek() == '>') { | |
168 | s.in.read(); | |
169 | break; | |
170 | } else { | |
171 | buf.append("--"); | |
172 | } | |
a5e6bd24 | 173 | } else { |
7c0e72ac | 174 | buf.append("-"); |
a5e6bd24 FT |
175 | } |
176 | } else { | |
7c0e72ac | 177 | buf.append((char)s.in.read()); |
a5e6bd24 FT |
178 | } |
179 | } | |
7c0e72ac | 180 | return(s.doc.createComment(buf.toString())); |
a5e6bd24 | 181 | } |
7c0e72ac FT |
182 | |
183 | protected Node stag(State s) throws IOException { | |
184 | int c = s.in.peek(true); | |
185 | if(c < 0) { | |
186 | throw(new ParseException("Unexpected end-of-file while parsing tag type")); | |
187 | } else if(c == '!') { | |
188 | return(comment(s)); | |
189 | } else { | |
190 | return(element(s)); | |
191 | } | |
192 | } | |
193 | ||
194 | protected Text text(State s) throws IOException { | |
195 | StringBuilder buf = new StringBuilder(); | |
196 | while(true) { | |
197 | int c = s.in.peek(); | |
198 | if(c < 0) { | |
199 | break; | |
200 | } else if(c == '<') { | |
201 | break; | |
202 | } else if(c == '&') { | |
203 | buf.append(entity(s)); | |
204 | } else { | |
205 | buf.append((char)s.in.read()); | |
206 | } | |
207 | } | |
208 | return(s.doc.createTextNode(buf.toString())); | |
209 | } | |
210 | ||
211 | public DocumentFragment parse(Reader in) throws IOException { | |
212 | State s = new State(in); | |
213 | DocumentFragment frag = s.doc.createDocumentFragment(); | |
214 | while(true) { | |
215 | int c = s.in.peek(); | |
216 | if(c < 0) { | |
217 | return(frag); | |
218 | } else if(c == '<') { | |
219 | s.in.read(); | |
220 | frag.appendChild(stag(s)); | |
221 | } else { | |
222 | frag.appendChild(text(s)); | |
223 | } | |
224 | } | |
225 | } | |
226 | ||
227 | private static String printable(int c) { | |
228 | if(c < 0) | |
229 | return("EOF"); | |
a5e6bd24 FT |
230 | if(c < 32) |
231 | return(String.format("\\%03o", (int)c)); | |
7c0e72ac | 232 | return(Character.toString((char)c)); |
a5e6bd24 FT |
233 | } |
234 | ||
235 | public static void main(String[] args) throws Exception { | |
236 | Parser p = new Parser(); | |
237 | DocumentFragment f = p.parse(new FileReader(args[0])); | |
238 | javax.xml.transform.TransformerFactory fac = javax.xml.transform.TransformerFactory.newInstance(); | |
239 | fac.setAttribute("indent-number", 2); | |
240 | javax.xml.transform.Transformer t = fac.newTransformer(); | |
241 | t.setOutputProperty(javax.xml.transform.OutputKeys.INDENT, "yes"); | |
242 | t.transform(new javax.xml.transform.dom.DOMSource(f), new javax.xml.transform.stream.StreamResult(System.out)); | |
243 | System.out.println(t.getClass()); | |
244 | } | |
245 | } |