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19
23
24 import java.io.*;
25 import java.util.*;
26 import org.w3c.dom.*;
27
28 import java.beans.*;
29
30 import org.netbeans.modules.schema2beans.*;
31 import book.*;
32
33
34 public class TestVeto extends BaseTest
35 {
36 public static void main(String  [] argv) {
37 BaseTest o = new TestVeto();
38 if (argv.length > 0)
39 o.setDocumentDir(argv[0]);
40 try {
41 o.run();
42 } catch (Exception e) {
43 e.printStackTrace();
44 System.exit(1);
45 }
46 System.exit(0);
47 }
48
49 public class MyListener implements VetoableChangeListener
50 {
51 GraphManager gm;
52 String listenerName;
53 String title;
54 Object oldValue;
55 Object newValue;
56 String propertyName;
57 Object source;
58 int index;
59
60 boolean remove;
61
62 Chapter tracePara;
64
65 boolean raise = false;;
66 boolean raised = false;
67 boolean printStringArray = false;
68
69 public MyListener(String title, BaseBean bean)
70 {
71 this.listenerName = bean.name();
72 gm = bean.graphManager();
73 this.remove = false;
74 this.title = title;
75 out("new listener for " + this.title + " / " + this.listenerName);
76 }
77
78 public void printStringValues(String [] ss, String str)
79 {
80 if (ss == null)
81 out(str + " is null");
82 else
83 {
84 if (ss.length == 0)
85 out(str + ".length = 0");
86 else
87 for(int i=0; i<ss.length; i++)
88 out(str + "[" + i + "]=" + ss[i]);
89 }
90 }
91
92 public void reset()
93 {
94 this.oldValue = null;
95 this.newValue = null;
96 this.propertyName = null;
97 this.source = null;
98 this.index = -1;
99 this.raise = false;
100 this.raised = false;
101 this.printStringArray = false;
102 }
103
104 public void printStringArray()
105 {
106 this.printStringArray = true;
107 }
108
109 public void traceParagraphs(Chapter c)
110 {
111 this.tracePara = c;
112 }
113
114 public void veto()
115 {
116 this.raise = true;
117 }
118
119 public void vetoableChange(PropertyChangeEvent e)
120 throws PropertyVetoException
121 {
122 if (this.raised)
123 out(this.title+ " received an undo event:");
124 else
125 out(this.title + " received veto event:");
126
127 this.oldValue = e.getOldValue();
128 this.newValue = e.getNewValue();
129 this.propertyName = e.getPropertyName();
130 this.source = e.getSource();
131 String n = this.propertyName;
132 this.index = gm.getPropertyIndex(n);
133
134 out("<Lnr:" + this.listenerName + " Evt:" + n +
135 " Src:" + this.source.getClass().getName() + ">");
136 if (remove)
137 {
138 out("<" + gm.getPropertyName(n) + "[" + this.index +
139 "]" + " - Parent: " + gm.getPropertyParentName(n) + ">");
140 }
141 else
142 {
143 out("<" + gm.getPropertyName(n) + "[" + this.index +
144 "]" + " - Parent: " + gm.getPropertyParentName(n) +
145 "/" + gm.getPropertyParent(n).getClass().getName() + ">");
146 }
147
148 if (this.tracePara != null)
149 {
150 String [] p = this.tracePara.getParagraph();
151 for (int i=0; i<p.length; i++)
152 out("From event listener: " + p[i]);
153 }
154
155 if (this.printStringArray)
156 {
157 this.printStringValues((String [])this.oldValue, "oldValues");
158 this.printStringValues((String [])this.newValue, "newValues");
159 }
160
161 if (this.raise && !this.raised)
162 {
163 out("Listener: raising PropertyVetoException");
164 this.raised = true;
165 throw new PropertyVetoException("value rejected", e);
166 }
167 }
170
171 public void removeMode()
172 {
173 this.remove = true;
174 }
175
176 public Object oldValue()
177 {
178 return this.oldValue;
179 }
180
181 public String stringOldValue()
182 {
183 if (this.oldValue == null)
184 return "<null>";
185 else
186 return this.oldValue.toString();
187 }
188
189 public Object newValue()
190 {
191 return this.newValue;
192 }
193
194 public String stringNewValue()
195 {
196 if (this.newValue == null)
197 return "<null>";
198 else
199 return this.newValue.toString();
200 }
201
202 public String name()
203 {
204 return this.propertyName;
205 }
206
207 public String toString()
208 {
209 return this.name() + " raised from source " +
210 this.source.getClass().getName();
211 }
212 }
213
214 public void run()
215 throws Exception
216 {
217 Book book;
218
219 this.readDocument();
220
221 out("creating the bean graph");
222 book = Book.createGraph(this.doc);
223 GraphManager gm = book.graphManager();
224
225 out("bean graph created");
226
228
243
244 MyListener l = new MyListener("Book listener", book);
248 book.addVetoableChangeListener(l);
249 setTest("simple change event on the root - no veto");
251 l.reset();
252 String s = "This book is about how to veto changes";
253 book.setSummary(s);
255 check(l.oldValue() == null, "(old value)");
257 check(l.newValue().equals(s), "(new value)");
258 check(book.getSummary().equals(s), "(new value)");
259
260 boolean gotException = false;
261 setTest("simple change event on the root - veto");
262 l.reset();
263 l.veto();
264 String s2 = "this is the new value";
265 s = book.getSummary();
266 try {
267 book.setSummary(s2);
268 } catch(PropertyVetoException ve) {
269 check(book.getSummary().equals(s), "(got exception & same value)");
270 gotException = true;
271 }
272
273 if (!gotException)
274 check(false, " didn't get the veto exception (1)!");
275
276 setTest("Try to listen for a non vetoable property");
277 gotException = false;
278 try {
279 book.addVetoableChangeListener("Reviews", l);
280 } catch(Exception e) {
281 check(true, "got exception:\n" + e.getMessage());
282 gotException = true;
283 }
284
285 if (!gotException)
286 check(false, " didn't get the runtime exception (2)!");
287
288 setTest("Indexed final property");
289 l.reset();
290 String [] ss = {"Author1", "Author2", "Author3"};
291 l.printStringArray();
292 book.setAuthor(ss);
293
294 l.reset();
295 l.veto();
296 l.printStringArray();
297 String [] ss2 = {"Author1_new", "Author2_new"};
298 try {
299 book.setAuthor(ss2);
300 } catch(PropertyVetoException ve) {
301 check(true, "(got exception)");
302 gotException = true;
303 }
304
305 if (!gotException)
306 check(false, " didn't get the veto exception (3)!");
307
308 l.printStringValues(book.getAuthor(), "getAuthor()");
309
310 setTest("Set a second listener to get two events");
311 MyListener l2 = new MyListener("Author listener", book);
312 l.reset();
313 l2.reset();
314 gotException = false;
315 try {
316 book.addVetoableChangeListener("author", l2);
317 } catch(Exception e) {
318 check(false, "got exception:\n" + e.getMessage());
319 gotException = true;
320 }
321
322 String [] ss3 = {"re-Author1_new", "re-Author2_new"};
323 book.setAuthor(ss3);
324 l.printStringValues(book.getAuthor(), "getAuthor()");
325
326 l.reset();
327 l2.reset();
328 l.veto();
329 String [] ss4 = {"only_one_author"};
330 try {
331 book.setAuthor(ss4);
332 } catch(PropertyVetoException ve) {
333 check(true, "(got exception)");
334 gotException = true;
335 }
336
337 if (!gotException)
338 check(false, " didn't get the veto exception (4)!");
339
340 }
341
342 }
343
344
345
346
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Java API By Example, From Geeks To Geeks.