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1
2
3 package Jt.xml;
4 import java.util.*;
5 import java.lang.reflect.*;
6 import java.beans.*;
7 import java.io.*;
8 import org.xml.sax.*;
9 import org.xml.sax.helpers.*;
10 import Jt.*;
11
12
15
16
17 public class JtScriptInterpreter extends JtObject {
18 private XMLReader reader = null;
19 private String  filename;
20 private String content;
21 private boolean remoteInvocation = false;
22 JtXMLHelper xmlHelper = null;
24 Object scriptOutput = null;
28
29
30 public JtScriptInterpreter () {
31 }
32
33
34
38
39 public void setFilename (String filename) {
40 this.filename = filename;
41 }
42
43
44
47
48 public String getFilename () {
49 return (filename);
50 }
51
52
56
57 public void setContent (String content) {
58 this.content = content;
59 }
60
61
62
65 public String getContent () {
66 return (content);
67 }
68
69
70
71
72 public void setRemoteInvocation (boolean remoteInvocation) {
73 this.remoteInvocation = remoteInvocation;
74 }
75
76
77 public boolean getRemoteInvocation () {
78 return (remoteInvocation);
79 }
80
81
83 private Exception propagateException (Object obj)
84 {
85 Exception ex;
86
87 if (obj == null)
88 return null;
89
90 ex = (Exception )
91 getValue (obj, "objException");
92
93 if (ex != null)
94 setValue (this, "objException", ex);
95
96 return (ex);
97 }
98
99
100
103 private Object interpretMsg (Object event) {
104
105 String msgid;
106 JtMessage msg = (JtMessage) event;
107 Object result = null;
108 String ctype;
109
110 if (msg == null)
111 return (null);
112
113 msgid = (String ) msg.getMsgId ();
114
115 if (msgid == null)
116 return (null);
117
118 if (msgid.equals ("JtSET_VALUE")) {
119
120 if ("this".equals (msg.getMsgSubject ()))
121 setValue (this,
122 msg.getMsgContent (),
123 msg.getMsgData());
124 else
125 setValue (msg.getMsgSubject (),
126 msg.getMsgContent (),
127 msg.getMsgData());
128
129 return (null);
131 }
132
133 if (msgid.equals ("JtCREATE_OBJECT")) {
134
137 ctype = (String ) msg.getMsgContent();
138
139 if (remoteInvocation) {
140 if ("Jt.JtOSCommand".equals (ctype) || "Jt.JtFile".equals (ctype)) {
141 handleError ("Security violation: unable to create a remote instance of " +
142 ctype);
143
144 return (null);
145 }
146
147 }
148 result = createObject (msg.getMsgContent (),
149 msg.getMsgData());
150
151 if (remoteInvocation)
152 return (null);
153
154 scriptOutput = result;
155 return (result);
156 }
157
158 if (msgid.equals ("JtGET_VALUE")) {
159
160
161 result = getValue (msg.getMsgContent (),
162 msg.getMsgData());
163
164 scriptOutput = result;
165 return (result);
166 }
167
168 if (msgid.equals ("JtREMOVE_OBJECT")) {
169 removeObject (msg.getMsgContent ());
170 return (null);
171 }
172
173
174 if (msgid.equals ("JtSEND_MESSAGE")) {
175
176 result = sendMessage (msg.getMsgContent (),
177 msg.getMsgData ());
178
179
181 scriptOutput = result;
182 return (result);
183
184 }
185
186 if (msgid.equals ("JtREMOVE")) {
187 return (null);
188 }
189
190 handleError ("JtScriptInterpreter.interpretMessage: invalid msg ID:"
191 + msg.getMsgId ());
192 return (null);
193 }
194
195
196 private Object parse () {
197
198
199 JtMessage msg;
200 JtList col;
201 JtMessage msg1;
202 JtIterator iterator;
203 String str;
204 JtFile file;
205 Object result = null;
206 Exception ex;
207
208 if (filename != null && content != null) {
209 handleError ("JtScriptInterpreter.parse: set uri or string (only one)");
210 return null;
211 }
212
213 if (filename == null && content == null) {
214 handleError ("JtScriptInterpreter.parse: both uri and string are null");
215 return null;
216 }
217
218 scriptOutput = null;
219
220 if (filename != null) {
221
222 file = new JtFile ();
223
224 setValue (file, "name", filename);
225
226 str = (String ) sendMessage (file, new JtMessage ("JtCONVERT_TO_STRING"));
227
228
229 } else
230 str = content;
231
232
233 if (str == null)
234 return (null);
235
236 if (xmlHelper == null)
237 xmlHelper = (JtXMLHelper) createObject ("Jt.xml.JtXMLHelper", "xmlHelper");
238
239
240 msg = new JtMessage ("JtCONVERT_XML_TO_OBJECT");
241
242 msg.setMsgContent (str);
243
244 col = (JtList) sendMessage (xmlHelper, msg);
245
246
248 if (col == null)
249 return (null);
250
251 msg = new JtMessage ("JtNEXT");
252
253 iterator = (JtIterator) getValue (col, "iterator");
254
255 if (iterator == null)
256 return (null);
257
258 for (;;) {
259 msg1 = (JtMessage) iterator.processMessage (new JtMessage ("JtNEXT"));
261
262 if (msg1 == null)
263 break;
264
265 interpretMsg (msg1);
266
267 ex = (Exception )
268 getValue (this, "objException");
269
270 if (ex != null)
271 break; }
274
275 return (scriptOutput);
276 }
277
278
279
281 public Object processMessage (Object event) {
282
283 String msgid = null;
284 JtMessage e = (JtMessage) event;
285 Object content;
286
287 if (e == null)
288 return null;
289
290 msgid = (String ) e.getMsgId ();
291
292 if (msgid == null)
293 return null;
294
295
297 if (msgid.equals ("JtPARSE")) {
298 return (parse ());
299 }
300
301
302 handleError ("JtScriptInterpreter.processMessage: invalid message id:" + msgid);
303 return (null);
304
305 }
306
307
308
309
312
313 public static void main(String [] args) {
314
315 JtObject main = new JtObject ();
316 JtMessage msg, msg1;
317 Integer count;
318 String str;
319
320 main.setObjTrace (1);
321
323
324 if (args.length < 1) {
325 System.err.println ("Usage: java JtScriptInterpreter uri");
326 System.exit (1);
327 }
328
329
331 main.createObject ("Jt.xml.JtScriptInterpreter", "reader");
332
333 msg = (JtMessage) main.createObject ("Jt.JtMessage", "message");
334 main.setValue ("message", "msgId", "JtPARSE");
335 main.setValue ("reader", "filename", args[0]);
336
337
338 main.setValue ("message", "msgId", "JtPARSE");
339
340
341 main.sendMessage ("reader", "message");
342
343
344 }
345
346 }
347
348
349 |
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