|
1
54
55 package org.apache.jetspeed.portal.portlets;
56
57 import java.io.*;
59 import java.util.*;
60
61 import org.apache.ecs.html.*;
63 import org.apache.ecs.ElementContainer;
64 import org.apache.ecs.ConcreteElement;
65 import org.apache.ecs.ClearElement;
66 import org.apache.ecs.StringElement;
67
68 import org.apache.jetspeed.util.*;
70 import org.apache.jetspeed.portal.*;
71
72 import org.apache.jetspeed.portal.portlets.util.poll.*;
74
75
76 import org.apache.turbine.util.*;
78
79
80
88 public class PollPortlet extends AbstractPortlet {
89
90
91 public static final String  VOTE = "Vote";
92
93
94 public static final String ACTION_KEY = "jetspeed.poll.action";
95 public static final String VOTE_KEY = "jetspeed.poll.vote";
96 public static final String QUESTION_KEY = "jetspeed.poll.question";
97 public static final String ANSWER_KEY = "jetspeed.poll.answer";
98 public static final String RESULTS_KEY = "jetspeed.poll.results";
99
100 public static final String WARNING = "NOTE: Do to use this poll for anything important, it might not be accurate!";
101
102
106 public static final String ACTION_VOTE = VOTE_KEY;
107
108
111 public static final String ACTION_GET_RESULTS = "jetspeed.pool.results";
112
113
116 public static final String IMG_MAINBAR = "images/poll/mainbar.gif";
117
118
121 public static final int DEFAULT_IMG_WIDTH = 400;
122
123
126 public static final int DEFAULT_IMG_HEIGHT = 20;
127
128 private AnswerGroup ag = null;
129 private Question question = new Question( "Question? What question? :)" );
130
131
134 private Hashtable votes = new Hashtable();
135
136
143 public ConcreteElement getContent(RunData rundata) {
144
145 String action = rundata.getParameters().getString( ACTION_KEY );
146
147 if ( action == null ) {
148
149 return getUI( rundata );
150
151 } else if ( action.equals( VOTE_KEY ) ) {
152
153 if ( ! this.hasVoted( rundata ) ) {
155 this.getAnswerGroup()
156 .getAnswer( rundata
157 .getParameters().getInt( ANSWER_KEY ) ).castVote();
158 }
159
160 }
161
162
163 if ( action.equals( VOTE_KEY ) ||
166 action.equals( RESULTS_KEY ) ) {
167
168 ConcreteElement results = this.getResults( rundata );
169
170 if ( action.equals( VOTE_KEY ) ) {
172 this.setVoted( true, rundata );
173 }
174
175 return results;
176
177 }
178
179 return getUI( rundata );
180
181 }
182
183
188 public void init() {
189
190 this.setQuestion( new Question( this.getPortletConfig().getInitParameter( QUESTION_KEY ) ) );
191
192 Enumeration params = this.getPortletConfig().getInitParameterNames();
194
195 Vector v = new Vector();
196
197 int id = 0;
198 while ( params.hasMoreElements() ) {
199
200 String key = (String )params.nextElement();
201 if( key.indexOf( ANSWER_KEY ) > -1 ) {
202 v.addElement( new Answer( this.getPortletConfig().getInitParameter( key ), id ) );
203 ++id;
204 }
205
206 }
207
208
209 Answer[] answers = new Answer[v.size()];
210 v.copyInto( answers );
211 this.ag = new AnswerGroup( answers );
212
213 this.setTitle( VOTE );
215 this.setDescription( VOTE + ": " + this.getQuestion().getTitle() );
216 }
217
218
221 private ConcreteElement getUI( RunData rundata ) {
222
223 Form form = new Form();
224
225 form.addElement( new B().addElement( this.getQuestion().getTitle() ) );
227
228
229 Answer[] answers = this.ag.getAnswers();
230 for( int i = 0; i < answers.length; ++i ) {
232
233 form.addElement( new BR() );
234 form.addElement( new Input().setType( "radio" )
235 .setName( ANSWER_KEY )
236 .setValue( answers[i].getID() )
237 .addElement( answers[i].getTitle() ) );
238
239 }
240
241 form.addElement( new BR() );
242
243 form.addElement( new Input().setType( "submit" )
245 .setValue( VOTE ) );
246
247
248 form.addElement( " [ " );
250
251 DynamicURI uri = new DynamicURI( rundata );
252 uri.addQueryData( ACTION_KEY, RESULTS_KEY );
253 form.addElement( new A( uri.toString() ).addElement( "Results" ) );
254
255 form.addElement( " ] " );
256
257 form.addElement( new Input().setType( "hidden" )
259 .setName( ACTION_KEY )
260 .setValue( VOTE_KEY ) );
261
262 return form;
263 }
264
265
270 public AnswerGroup getAnswerGroup() {
271 return this.ag;
272 }
273
274
279 public void setQuestion( Question question ) {
280 this.question = question;
281 }
282
283
288 public Question getQuestion() {
289 return this.question;
290 }
291
292
293
295
300 private ConcreteElement getResults( RunData rundata ) {
301
302 ElementContainer ec = new ElementContainer();
303
304 AnswerGroup ag = this.getAnswerGroup();
305
306 Answer[] answers = ag.getAnswers();
307
308 int top = ag.getTopAnswer().getVoteCount();
309
310 ConcreteElement nbsp = new ClearElement( " " );
311
312 if ( this.hasVoted( rundata ) ) {
314 ec.addElement( new I().addElement( "You have already voted!" ) );
315 ec.addElement( new BR() );
316 }
317
318
319 ec.addElement( new B().addElement( this.getQuestion().getTitle() ) );
322
323 Table table = new Table();
324
325 for( int i = 0; i < answers.length; ++i ) {
326
327 Answer answer = answers[i];
328
329
331 int width = 0;
332
333 TR row = new TR();
334
335 row.addElement( getColumn( answer.getTitle() ) );
336
337 if ( answer.getVoteCount() == 0 ) {
338 width = 1;
339 } else {
340 width = ( DEFAULT_IMG_WIDTH / top ) * answer.getVoteCount();
341 }
342
343
344
345 TD result = getColumn( new IMG().setSrc( IMG_MAINBAR )
346 .setWidth( width )
347 .setHeight( DEFAULT_IMG_HEIGHT ) );
348
349 result.addElement( nbsp );
351 result.addElement( Integer.toString( answer.getVoteCount() ) +
352 " / " +
353 Integer.toString( ag.getPercentage( answer ) ) +
354 "%" );
355
356 row.addElement( result );
357
358 row.addElement( new TD().setWidth( "100%" ) );
359
360 table.addElement( row );
361 }
362
363 ec.addElement( table );
364
365 ec.addElement( new BR() );
367 ec.addElement( new B()
368 .addElement( Integer.toString( this.getAnswerGroup().getTotal() ) +
369 " total vote(s)" ) );
370
371 ec.addElement( new BR() );
373 ec.addElement( WARNING );
374
375 return ec;
376 }
377
378
384 private TD getColumn( String data ) {
385
386 return getColumn( new StringElement( data ) );
387
388 }
389
390
391
397 private TD getColumn( ConcreteElement ce ) {
398
399 return new TD().setVAlign( "middle" )
400 .setAlign( "left" )
401 .setNoWrap( true )
402 .addElement( ce );
403
404 }
405
406
412 private boolean hasVoted( RunData rundata ) {
413
414
421
422 String addr = rundata.getRequest().getRemoteAddr();
423
424 if ( addr == null ) {
425 return false;
426 }
427
428 if ( this.votes.get( addr ) == null ) {
429 return false;
430 } else {
431 return true;
432 }
433
434 }
435
436
442 public void setVoted( boolean voted, RunData rundata ) {
443
444 String addr = rundata.getRequest().getRemoteAddr();
445
446 if ( voted ) {
447
448 if ( this.votes.get( addr ) == null ) {
449 this.votes.put( addr, addr );
450 }
451
452 } else {
453 this.votes.remove( addr );
454 }
455
456
457 }
458
459 }
460
461
462
463
464 |
Popular Tags |
Java API By Example, From Geeks To Geeks.