1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
|
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>Nepomuk.Query.QueryServiceClient</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Style-Type" content="text/css" />
<link rel="stylesheet" type="text/css" href="../common/doxygen.css" />
<link rel="stylesheet" media="screen" type="text/css" title="KDE Colors" href="../common/kde.css" />
</head>
<body>
<div id="container">
<div id="header">
<div id="header_top">
<div>
<div>
<img alt ="" src="../common/top-kde.jpg"/>
KDE 4.7 PyKDE API Reference
</div>
</div>
</div>
<div id="header_bottom">
<div id="location">
<ul>
<li>KDE's Python API</li>
</ul>
</div>
<div id="menu">
<ul>
<li><a href="../modules.html">Overview</a></li>
<li><a href="http://techbase.kde.org/Development/Languages/Python">PyKDE Home</a></li>
<li><a href="http://kde.org/family/">Sitemap</a></li>
<li><a href="http://kde.org/contact/">Contact Us</a></li>
</ul>
</div>
</div>
</div>
<div id="body_wrapper">
<div id="body">
<div id="right">
<div class="content">
<div id="main">
<div class="clearer"> </div>
<h1>QueryServiceClient Class Reference</h1>
<code>from PyKDE4.nepomuk import *</code>
<p>
Inherits: QObject<br />
Namespace: <a href="../nepomuk/Nepomuk.Query.html">Nepomuk.Query</a><br />
<h2>Detailed Description</h2>
<p>\class QueryServiceClient queryserviceclient.h Nepomuk/Query/QueryServiceClient
</p>
<p>
Convenience frontend to the %Nepomuk Query DBus Service
</p>
<p>
The QueryServiceClient provides an easy way to access the %Nepomuk Query Service
without having to deal with any communication details. By default it monitors
queries for changes.
</p>
<p>
Usage is simple: Create an instance of the client for each search you want to
track. One instance may also be reused for subsequent queries if further updates
of the persistent query are not necessary.
</p>
<p>
For quick queries which do not require any updates one of the static query methods
can be used: syncQuery(), syncSparqlQuery(), or syncDesktopQuery().
</p>
<p>
<dl class="author" compact><dt><b>Author:</b></dt><dd> Sebastian Trueg <trueg@kde.org> </dd></dl>
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.4
</dd></dl>
</p>
<table border="0" cellpadding="0" cellspacing="0"><tr><td colspan="2"><br><h2>Signals</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#entriesRemoved">entriesRemoved</a> ([QUrl] entries)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#error">error</a> (QString errorMessage)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#finishedListing">finishedListing</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#newEntries">newEntries</a> ([<a href="../nepomuk/Nepomuk.Query.Result.html">Nepomuk.Query.Result</a>] entries)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#resultCount">resultCount</a> (int count)</td></tr>
<tr><td colspan="2"><br><h2>Methods</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#QueryServiceClient">__init__</a> (self, QObject parent=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#blockingDesktopQuery">blockingDesktopQuery</a> (self, QString query)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#blockingQuery">blockingQuery</a> (self, <a href="../nepomuk/Nepomuk.Query.Query.html">Nepomuk.Query.Query</a> query)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#blockingSparqlQuery">blockingSparqlQuery</a> (self, QString query, {QString:<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>} requestPropertyMap=Nepomuk.Query.RequestPropertyMap())</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#close">close</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#desktopQuery">desktopQuery</a> (self, QString query)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QString </td><td class="memItemRight" valign="bottom"><a class="el" href="#errorMessage">errorMessage</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#isListingFinished">isListingFinished</a> (self)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#query">query</a> (self, <a href="../nepomuk/Nepomuk.Query.Query.html">Nepomuk.Query.Query</a> query)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#sparqlQuery">sparqlQuery</a> (self, QString query, {QString:<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>} requestPropertyMap=Nepomuk.Query.RequestPropertyMap())</td></tr>
<tr><td colspan="2"><br><h2>Static Methods</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#serviceAvailable">serviceAvailable</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">[<a href="../nepomuk/Nepomuk.Query.Result.html">Nepomuk.Query.Result</a>] </td><td class="memItemRight" valign="bottom"><a class="el" href="#syncDesktopQuery">syncDesktopQuery</a> (QString query, bool ok=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">[<a href="../nepomuk/Nepomuk.Query.Result.html">Nepomuk.Query.Result</a>] </td><td class="memItemRight" valign="bottom"><a class="el" href="#syncQuery">syncQuery</a> (<a href="../nepomuk/Nepomuk.Query.Query.html">Nepomuk.Query.Query</a> query, bool ok=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">[<a href="../nepomuk/Nepomuk.Query.Result.html">Nepomuk.Query.Result</a>] </td><td class="memItemRight" valign="bottom"><a class="el" href="#syncSparqlQuery">syncSparqlQuery</a> (QString query, {QString:<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>} requestPropertyMap=Nepomuk.Query.RequestPropertyMap(), bool ok=0)</td></tr>
</table>
<hr><h2>Signal Documentation</h2><a class="anchor" name="entriesRemoved"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> entriesRemoved</td>
<td>(</td>
<td class="paramtype">[QUrl] </td>
<td class="paramname"><em>entries</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Emitted if the search results changed when monitoring a query.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>entries</em> </td><td> A list of resource URIs identifying the resources
that dropped out of the query results.
</td></tr>
</table></dl>
<p>
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("entriesRemoved(const QList<QUrl>&)"), target_slot)</code></dd></dl></div></div><a class="anchor" name="error"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> error</td>
<td>(</td>
<td class="paramtype">QString </td>
<td class="paramname"><em>errorMessage</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Emitted when an error occurs. This typically happens in case the query
service is not running or does not respond. No further signals will be
emitted after this one.
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.6
</dd></dl>
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("error(const QString&)"), target_slot)</code></dd></dl></div></div><a class="anchor" name="finishedListing"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> finishedListing</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Emitted when the initial listing has been finished, ie. if all
results have been reported via newEntries. If no further updates
are necessary the client should be closed now.
</p>
<p>
In case of an error this signal is not emitted.
</p>
<p>
\sa error()
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("finishedListing()"), target_slot)</code></dd></dl></div></div><a class="anchor" name="newEntries"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> newEntries</td>
<td>(</td>
<td class="paramtype">[<a href="../nepomuk/Nepomuk.Query.Result.html">Nepomuk.Query.Result</a>] </td>
<td class="paramname"><em>entries</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Emitted for new search results. This signal is emitted both
for the initial listing and for changes to the search.
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("newEntries(const QList<Nepomuk::Query::Result>&)"), target_slot)</code></dd></dl></div></div><a class="anchor" name="resultCount"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> resultCount</td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>count</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>The number of results that are reported via newEntries() before the
finishedListing() signal.
</p>
<p>
Emitted once the count of the results is available. This might
happen before the first result is emitted, in between the results, or
in rare cases it could even happen after all results have been reported.
</p>
<p>
Also be aware that no count will be provided when using sparqlQuery()
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.6
</dd></dl>
</p><dl compact><dt><b>Signal syntax:</b></dt><dd><code>QObject.connect(source, SIGNAL("resultCount(int)"), target_slot)</code></dd></dl></div></div><hr><h2>Method Documentation</h2><a class="anchor" name="QueryServiceClient"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">__init__</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QObject </td>
<td class="paramname"><em>parent=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Create a new QueryServiceClient instance.
</p></div></div><a class="anchor" name="blockingDesktopQuery"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool blockingDesktopQuery</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString </td>
<td class="paramname"><em>query</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> a desktop query string which can be parsed by QueryParser.
</td></tr>
</table></dl>
<p> \sa desktopQuery(const QString&), close()
</p></div></div><a class="anchor" name="blockingQuery"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool blockingQuery</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../nepomuk/Nepomuk.Query.Query.html">Nepomuk.Query.Query</a> </td>
<td class="paramname"><em>query</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Start a query using the Nepomuk query service.
</p>
<p>
Results will be reported as with query(const QString&)
but a local event loop will be started to block the method
call until all results have been listed.
</p>
<p>
The client will be closed after the initial listing. Thus,
changes to results will not be reported as it is the case
with the non-blocking methods.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> the query to perform.
</td></tr>
</table></dl>
<p> <dl class="return" compact><dt><b>Returns:</b></dt><dd> <b>true</b> if the query service was found and the query
was started. <b>false</b> otherwise.
</dd></dl> </p>
<p>
\sa query(const Query&), close()
</p></div></div><a class="anchor" name="blockingSparqlQuery"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool blockingSparqlQuery</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString </td>
<td class="paramname"><em>query</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">{QString:<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>} </td>
<td class="paramname"><em>requestPropertyMap=Nepomuk.Query.RequestPropertyMap()</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> a SPARQL query which binds results to variable <b>'r'.</b>
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>requestPropertyMap</em> </td><td> An optional mapping of variable binding names in <b>query</b>
to their corresponding properties. For details see sparqlQuery.
</td></tr>
</table></dl>
<p> \sa sparqlQuery(const Query&)
</p></div></div><a class="anchor" name="close"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> close</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Close the client, thus stop to monitor the query
for changes. Without closing the client it will continue
signalling changes to the results.
</p>
<p>
This will also make any blockingQuery return immediately.
</p></div></div><a class="anchor" name="desktopQuery"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool desktopQuery</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString </td>
<td class="paramname"><em>query</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> a desktop query string which can be parsed by QueryParser.
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="errorMessage"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">QString errorMessage</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>The last error message which has been emitted via error() or an
empty string if there was no error.
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.6
</dd></dl>
</p></div></div><a class="anchor" name="isListingFinished"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool isListingFinished</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname"><em>self</em> )</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p><dl class="return" compact><dt><b>Returns:</b></dt><dd> <b>true</b> if all results have been listed (ie. finishedListing() has
been emitted), close() has been called, or no query was started.
</dd></dl> </p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.6
</dd></dl>
</p></div></div><a class="anchor" name="query"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool query</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype"><a href="../nepomuk/Nepomuk.Query.Query.html">Nepomuk.Query.Query</a> </td>
<td class="paramname"><em>query</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Start a query using the Nepomuk query service.
</p>
<p>
Results will be reported via newEntries. All results
have been reported once finishedListing has been emitted.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> the query to perform.
</td></tr>
</table></dl>
<p> <dl class="return" compact><dt><b>Returns:</b></dt><dd> <b>true</b> if the query service was found and the query
was started. <b>false</b> otherwise.
</dd></dl>
</p></div></div><a class="anchor" name="sparqlQuery"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool sparqlQuery</td>
<td>(</td>
<td class="paramtype"> <em>self</em>, </td>
<td class="paramname"></td>
</tr><tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">QString </td>
<td class="paramname"><em>query</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">{QString:<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>} </td>
<td class="paramname"><em>requestPropertyMap=Nepomuk.Query.RequestPropertyMap()</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> a SPARQL query which binds results to variable <b>'r'.</b>
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>requestPropertyMap</em> </td><td> An optional mapping of variable binding names in <b>query</b>
to their corresponding properties. These bindings will then be reported via
Result.requestProperties(). This map will be constructed automatically when using
query(const Query&).
</td></tr>
</table></dl>
<p> <b>Examples: </b>
</p>
<p>
Select a simple request property as can also be done via Query.Query:
</p>
<p>
<pre class="fragment">
QString query = "select ?r ?mtime where { "
"?r a nfo:FileDataObject . "
"?r nie:lastModified ?mtime . "
"}";
QueryServiceClient.RequestPropertyMap requestPropertyMap;
requestPropertyMap.insert( "mtime", Vocabulary.NIE.lastModified() );
sparqlQuery( query, requestPropertyMap );
</pre>
</p>
<p>
This will report the resources themselves and their modification time in the result's request
properties:
</p>
<p>
<pre class="fragment">
void handleResult( const Query.Result& results ) {
QDateTime lastModified = result.requestProperty( Vocabulary.NIE.lastModified() ).toDateTime();
[...]
</pre>
</p>
<p>
While using Query.Query restricts to request properties to diret properties of the
results using a custom SPARQL query allows to use any binding as request property.
The used property URI in the mapping does not even need to match anything in the query:
</p>
<p>
<pre class="fragment">
QString query = "select ?r ?phone where { "
"?r a nco:PersonContact . "
"?r nco:hasPhoneNumber ?n . "
"?n nco:phoneNumber ?phone . "
"}";
QueryServiceClient.RequestPropertyMap requestPropertyMap;
requestPropertyMap.insert( "phone", Vocabulary.NCO.hasPhoneNumber() );
</pre>
</p>
<p>
\sa Query.requestPropertyMap()
</p></div></div><hr><h2>Static Method Documentation</h2><a class="anchor" name="serviceAvailable"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool serviceAvailable</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Check if the Nepomuk query service is running.
<dl class="return" compact><dt><b>Returns:</b></dt><dd> <b>true</b> if the Nepomuk query service is running and could
be contacted via DBus, <b>false</b> otherwise
</dd></dl>
</p></div></div><a class="anchor" name="syncDesktopQuery"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">[<a href="../nepomuk/Nepomuk.Query.Result.html">Nepomuk.Query.Result</a>] syncDesktopQuery</td>
<td>(</td>
<td class="paramtype">QString </td>
<td class="paramname"><em>query</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>ok=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> a desktop query string which can be parsed by QueryParser.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>ok</em> </td><td> a valid boolean pointer, which will be set to <b>true</b>
if the query service was found and the query was started, <b>false</b> otherwise.
If you don't want to track errors, you can pass a null pointer instead.
</td></tr>
</table></dl>
<p> \sa desktopQuery(const QString&)
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.5
</dd></dl>
</p></div></div><a class="anchor" name="syncQuery"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">[<a href="../nepomuk/Nepomuk.Query.Result.html">Nepomuk.Query.Result</a>] syncQuery</td>
<td>(</td>
<td class="paramtype"><a href="../nepomuk/Nepomuk.Query.Query.html">Nepomuk.Query.Query</a> </td>
<td class="paramname"><em>query</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>ok=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Start a query using the Nepomuk query service.
</p>
<p>
A local event loop will be started to block the method
call until all results have been listed, and results will be
returned. You can check if the query was successful through
the <b>ok</b> pointer.
</p>
<p>
If updates to the query results are required an instance of QueryServiceClient
should be created and one of the non-static query methods be used.
</p>
<p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> the query to perform.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>ok</em> </td><td> a valid boolean pointer, which will be set to <b>true</b>
if the query service was found and the query was started, <b>false</b> otherwise.
If you don't want to track errors, you can pass a null pointer instead.
</td></tr>
</table></dl>
<p> <dl class="return" compact><dt><b>Returns:</b></dt><dd> a list of <b>Result</b> for the given query.
</dd></dl> </p>
<p>
\sa query(const Query&)
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.5
</dd></dl>
</p></div></div><a class="anchor" name="syncSparqlQuery"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">[<a href="../nepomuk/Nepomuk.Query.Result.html">Nepomuk.Query.Result</a>] syncSparqlQuery</td>
<td>(</td>
<td class="paramtype">QString </td>
<td class="paramname"><em>query</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">{QString:<a href="../nepomuk/Nepomuk.Types.Property.html">Nepomuk.Types.Property</a>} </td>
<td class="paramname"><em>requestPropertyMap=Nepomuk.Query.RequestPropertyMap()</em>, </td>
</tr>
<tr>
<td class="memname"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>ok=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>query</em> </td><td> a SPARQL query which binds results to variable <b>'r'.</b>
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>ok</em> </td><td> a valid boolean pointer, which will be set to <b>true</b>
if the query service was found and the query was started, <b>false</b> otherwise.
If you don't want to track errors, you can pass a null pointer instead.
</td></tr> </table></dl>
<p> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>requestPropertyMap</em> </td><td> An optional mapping of variable binding names in <b>query</b>
to their corresponding properties. For details see sparqlQuery.
</td></tr>
</table></dl>
<p> \sa sparqlQuery(const Query&)
</p>
<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.5
</dd></dl>
</p></div></div>
</div>
</div>
</div>
<div id="left">
<div class="menu_box">
<div class="nav_list">
<ul>
<li><a href="../allclasses.html">Full Index</a></li>
</ul>
</div>
<a name="cp-menu" /><div class="menutitle"><div>
<h2 id="cp-menu-project">Modules</h2>
</div></div>
<div class="nav_list">
<ul><li><a href="../akonadi/index.html">akonadi</a></li>
<li><a href="../dnssd/index.html">dnssd</a></li>
<li><a href="../kdecore/index.html">kdecore</a></li>
<li><a href="../kdeui/index.html">kdeui</a></li>
<li><a href="../khtml/index.html">khtml</a></li>
<li><a href="../kio/index.html">kio</a></li>
<li><a href="../knewstuff/index.html">knewstuff</a></li>
<li><a href="../kparts/index.html">kparts</a></li>
<li><a href="../kutils/index.html">kutils</a></li>
<li><a href="../nepomuk/index.html">nepomuk</a></li>
<li><a href="../phonon/index.html">phonon</a></li>
<li><a href="../plasma/index.html">plasma</a></li>
<li><a href="../polkitqt/index.html">polkitqt</a></li>
<li><a href="../solid/index.html">solid</a></li>
<li><a href="../soprano/index.html">soprano</a></li>
</ul></div></div>
</div>
</div>
<div class="clearer"/>
</div>
<div id="end_body"></div>
</div>
<div id="footer"><div id="footer_text">
This documentation is maintained by <a href="mailto:simon@simonzone.com">Simon Edwards</a>.<br />
KDE<sup>®</sup> and <a href="../images/kde_gear_black.png">the K Desktop Environment<sup>®</sup> logo</a> are registered trademarks of <a href="http://ev.kde.org/" title="Homepage of the KDE non-profit Organization">KDE e.V.</a> |
<a href="http://www.kde.org/contact/impressum.php">Legal</a>
</div></div>
</body>
</html>
|
