summaryrefslogtreecommitdiff
path: root/src/location/maps/qgeoserviceprovider.cpp
blob: 51b0de60aec89da2fdbec58543bbc2c084ff987d (plain)
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
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qgeoserviceprovider.h"
#include "qgeoserviceprovider_p.h"
#include "qgeoserviceproviderfactory.h"

#include "qgeocodingmanager.h"
#include "qgeomappingmanager_p.h"
#include "qgeoroutingmanager.h"
#include "qplacemanager.h"
#include "qgeocodingmanagerengine.h"
#include "qgeomappingmanagerengine_p.h"
#include "qgeoroutingmanagerengine.h"
#include "qplacemanagerengine.h"
#include "qplacemanagerengine_p.h"

#include <QList>
#include <QString>
#include <QVariant>

#include <QPluginLoader>
#include <QDebug>
#include <QStringList>
#include <QCoreApplication>
#include <QObject>
#include <QMetaObject>
#include <QMetaEnum>
#include <QProcess>
#include <QEventLoop>
#include <QtCore/private/qfactoryloader_p.h>

QT_BEGIN_NAMESPACE

#ifndef QT_NO_LIBRARY
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
        ("org.qt-project.qt.geoservice.serviceproviderfactory/5.0",
         QLatin1String("/geoservices")))
#endif

/*!
    \class QGeoServiceProvider
    \inmodule QtLocation
    \ingroup QtLocation-common
    \since 5.6

    \brief The QGeoServiceProvider class aggregates access to services which provide
    geographical information.

    The Maps and Navigation API allows people to access various kinds of
    geographical information, including functionality to perform geocoding,
    routing and the display of maps.  The QGeoServiceProvider aggregates the
    access to a set of these services that are provided by a single vendor.

    It is possible to mix and match service providers for the various domains,
    so that a geocoding manager from one service provider can be used with
    a geographic routing manager from another service provider.

    This is not recommended unless the client is able to verify that the
    data provided by the different services are compatible, as differences
    in the underlying data sets could cause serious incongruences between
    the services.

    Subclasses of QGeoServiceProvider guarantee that the different services
    that they provide are interoperable.

    At this point there are two GeoServices plugins packaged with Qt. They are
    accessible using their provider names:

    \list
        \li "mapbox" -> \l {Qt Location Mapbox Plugin}{Mapbox service}
        \li "here" -> \l {Qt Location HERE Plugin}{HERE Services}
        \li "osm" -> \l {Qt Location Open Street Map Plugin}{OpenStreetMap Services}
    \endlist

    Each service provider must follow a naming convention for their service specific
    parameter names/keys. They use the provider name as prefix for all their
    parameter names. For example, the \l {Qt Location HERE Plugin}{HERE} service provider
    requires the \c here.app_id parameter. When a provider is loaded only those parameters are
    passed on whose parameter names start with the provider name. This avoids the sharing
    sensitive parameters such as confidential \c token or \c app_id parameters with other
    plugins.

    Please check the GeoServices plugin specific documentation to
    obtain a complete list of the available parameter names/keys and values.
*/

/*!
    \enum QGeoServiceProvider::Error

    Describes an error related to the loading and setup of a service provider plugin.

    \value NoError
        No error has occurred.
    \value NotSupportedError
        The plugin does not support this functionality.
    \value UnknownParameterError
        The plugin did not recognize one of the parameters it was given.
    \value MissingRequiredParameterError
        The plugin did not find one of the parameters it was expecting.
    \value ConnectionError
        The plugin could not connect to its backend service or database.
*/

/*!
    \enum QGeoServiceProvider::RoutingFeature

    Describes the routing features supported by the geo service provider.

    \value NoRoutingFeatures            No routing features are supported.
    \value OnlineRoutingFeature         Online routing is supported.
    \value OfflineRoutingFeature        Offline routing is supported.
    \value LocalizedRoutingFeature      Supports returning routes with localized addresses and
                                        instructions.
    \value RouteUpdatesFeature          Updating an existing route based on the current position is
                                        supported.
    \value AlternativeRoutesFeature     Supports returning alternative routes.
    \value ExcludeAreasRoutingFeature   Supports specifying a areas which the returned route must
                                        not cross.
    \value AnyRoutingFeatures           Matches a geo service provider that provides any routing
                                        features.
*/

/*!
    \enum QGeoServiceProvider::GeocodingFeature

    Describes the geocoding features supported by the geo service provider.

    \value NoGeocodingFeatures          No geocoding features are supported.
    \value OnlineGeocodingFeature       Online geocoding is supported.
    \value OfflineGeocodingFeature      Offline geocoding is supported.
    \value ReverseGeocodingFeature      Reverse geocoding is supported.
    \value LocalizedGeocodingFeature    Supports returning geocoding results with localized
                                        addresses.
    \value AnyGeocodingFeatures         Matches a geo service provider that provides any geocoding
                                        features.
*/

/*!
    \enum QGeoServiceProvider::MappingFeature

    Describes the mapping features supported by the geo service provider.

    \value NoMappingFeatures        No mapping features are supported.
    \value OnlineMappingFeature     Online mapping is supported.
    \value OfflineMappingFeature    Offline mapping is supported.
    \value LocalizedMappingFeature  Supports returning localized map data.
    \value AnyMappingFeatures       Matches a geo service provider that provides any mapping
                                    features.
*/

/*!
    \enum QGeoServiceProvider::PlacesFeature

    Describes the places features supported by the geo service provider.

    \value NoPlacesFeatures             No places features are supported.
    \value OnlinePlacesFeature          Online places is supported.
    \value OfflinePlacesFeature         Offline places is supported.
    \value SavePlaceFeature             Saving places is supported.
    \value RemovePlaceFeature           Removing or deleting places is supported.
    \value SaveCategoryFeature          Saving categories is supported.
    \value RemoveCategoryFeature        Removing or deleting categories is supported.
    \value PlaceRecommendationsFeature  Searching for recommended places similar to another place
                                        is supported.
    \value SearchSuggestionsFeature     Search suggestions is supported.
    \value LocalizedPlacesFeature       Supports returning localized place data.
    \value NotificationsFeature         Notifications of place and category changes is supported.
    \value PlaceMatchingFeature         Supports matching places from two different geo service
                                        providers.
    \value AnyPlacesFeatures            Matches a geo service provider that provides any places
                                        features.
*/

/*!
    Returns a list of names of the available service providers, for use with
    the QGeoServiceProvider constructors.
*/
QStringList QGeoServiceProvider::availableServiceProviders()
{
    return QGeoServiceProviderPrivate::plugins().keys();
}

/*!
    Constructs a QGeoServiceProvider whose backend has the name \a
    providerName, using the provided \a parameters.

    If multiple plugins have the same \a providerName, the plugin with the
    highest reported providerVersion() will be used.

    If \a allowExperimental is true then plugins marked as experimental may be used.  By default
    experimental plugins are not considered.

    If no plugin matching \a providerName was able to be loaded then error()
    and errorString() will provide details about why this is the case.

    \note Before the list of \a parameters is passed on to the to-be-loaded
    provider plugin, the list is filtered to avoid the sharing of plugin specific
    parameters with unrelated provider plugins. Plugin specific parameter
    keys must be prefixed with the provider name (e.g. \c here.app_id).
*/
QGeoServiceProvider::QGeoServiceProvider(const QString &providerName,
                                         const QVariantMap &parameters,
                                         bool allowExperimental)
    : d_ptr(new QGeoServiceProviderPrivate())
{
    d_ptr->experimental = allowExperimental;
    d_ptr->parameterMap = parameters;
    // TODO Qt 6 Remove silent nokia rename
    if (providerName == QStringLiteral("nokia"))
        d_ptr->providerName = QStringLiteral("here");
    else
        d_ptr->providerName = providerName;
    d_ptr->loadMeta();
}

/*!
    Destroys the service provider object.
*/
QGeoServiceProvider::~QGeoServiceProvider()
{
    delete d_ptr;
}

/* Template for the routingFeatures(), geocodingFeatures() etc methods.
 * Ideally, the enumName would be a template parameter, but strings
 * are not a valid const expr. :( */
template <class Flags>
Flags QGeoServiceProviderPrivate::features(const char *enumName)
{
    const QMetaObject *mo = &QGeoServiceProvider::staticMetaObject;
    const QMetaEnum en = mo->enumerator(
                mo->indexOfEnumerator(enumName));

    /* We need the typename keyword here, or Flags::enum_type will be parsed
     * as a non-type and lead to an error */
    Flags ret = typename Flags::enum_type(0);
    if (this->metaData.contains(QStringLiteral("Features"))
            && this->metaData.value(QStringLiteral("Features")).isArray()) {
        QJsonArray features = this->metaData.value(QStringLiteral("Features")).toArray();
        foreach (const QJsonValue &v, features) {
            int val = en.keyToValue(v.toString().toLatin1().constData());
            if (v.isString() && val != -1) {
                ret |= typename Flags::enum_type(val);
            }
        }
    }

    return ret;
}

/*!
    Returns the routing features supported by the geo service provider.
*/
QGeoServiceProvider::RoutingFeatures QGeoServiceProvider::routingFeatures() const
{
    return d_ptr->features<RoutingFeatures>("RoutingFeatures");
}

/*!
    Returns the geocoding features supported by the geo service provider.
*/
QGeoServiceProvider::GeocodingFeatures QGeoServiceProvider::geocodingFeatures() const
{
    return d_ptr->features<GeocodingFeatures>("GeocodingFeatures");
}

/*!
    Returns the mapping features supported by the geo service provider.
*/
QGeoServiceProvider::MappingFeatures QGeoServiceProvider::mappingFeatures() const
{
    return d_ptr->features<MappingFeatures>("MappingFeatures");
}

/*!
    Returns the places features supported by the geo service provider.
*/
QGeoServiceProvider::PlacesFeatures QGeoServiceProvider::placesFeatures() const
{
    return d_ptr->features<PlacesFeatures>("PlacesFeatures");
}

/* Sadly, these are necessary to figure out which of the factory->createX
 * methods we need to call. Ideally it would be nice to find a way to embed
 * these into the manager() template. */
template <class Engine>
Engine *createEngine(QGeoServiceProviderPrivate *)
{
    return 0;
}
template <> QGeoCodingManagerEngine *createEngine<QGeoCodingManagerEngine>(QGeoServiceProviderPrivate *d_ptr)
{
    return d_ptr->factory->createGeocodingManagerEngine(d_ptr->cleanedParameterMap, &(d_ptr->geocodeError), &(d_ptr->geocodeErrorString));
}
template <> QGeoRoutingManagerEngine *createEngine<QGeoRoutingManagerEngine>(QGeoServiceProviderPrivate *d_ptr)
{
    return d_ptr->factory->createRoutingManagerEngine(d_ptr->cleanedParameterMap, &(d_ptr->routingError), &(d_ptr->routingErrorString));
}
template <> QGeoMappingManagerEngine *createEngine<QGeoMappingManagerEngine>(QGeoServiceProviderPrivate *d_ptr)
{
    return d_ptr->factory->createMappingManagerEngine(d_ptr->cleanedParameterMap, &(d_ptr->mappingError), &(d_ptr->mappingErrorString));
}
template <> QPlaceManagerEngine *createEngine<QPlaceManagerEngine>(QGeoServiceProviderPrivate *d_ptr)
{
    return d_ptr->factory->createPlaceManagerEngine(d_ptr->cleanedParameterMap, &(d_ptr->placeError), &(d_ptr->placeErrorString));
}

/* Template for generating the code for each of the geocodingManager(),
 * mappingManager() etc methods */
template <class Manager, class Engine>
Manager *QGeoServiceProviderPrivate::manager(QGeoServiceProvider::Error *_error,
                                             QString *_errorString, Manager **_manager)
{
    // make local references just so this method is easier to read
    QGeoServiceProvider::Error &error = *_error;
    QString &errorString = *_errorString;
    Manager *&manager = *_manager;

    if (!this->factory) {
        this->filterParameterMap();
        this->loadPlugin(this->parameterMap);
    }

    if (!this->factory || error != QGeoServiceProvider::NoError)
        return 0;

    if (!manager) {
        Engine *engine = createEngine<Engine>(this);

        if (engine) {
            engine->setManagerName(
                        this->metaData.value(QStringLiteral("Provider")).toString());
            engine->setManagerVersion(
                        int(this->metaData.value(QStringLiteral("Version")).toDouble()));
            manager = new Manager(engine);
        } else if (error == QGeoServiceProvider::NoError) {
            error = QGeoServiceProvider::NotSupportedError;
            errorString = QLatin1String("The service provider does not support the ");
            errorString.append(QLatin1String(Manager::staticMetaObject.className()));
            errorString.append(QLatin1String(" type."));
        }

        if (error != QGeoServiceProvider::NoError) {
            delete manager;
            manager = 0;
            this->error = error;
            this->errorString = errorString;
        }

        if (manager && this->localeSet)
            manager->setLocale(this->locale);
    }

    if (manager) {
        this->error = QGeoServiceProvider::NoError;
        this->errorString.clear();
    }

    return manager;
}

/*!
    Returns the QGeoCodingManager made available by the service
    provider.

    This function will return 0 if the service provider does not provide
    any geocoding services.

    This function will attempt to construct a QGeoCodingManager instance
    when it is called for the first time.  If the attempt is successful the
    QGeoCodingManager will be cached, otherwise each call of this function
    will attempt to construct a QGeoCodingManager instance until the
    construction is successful.

    The QGeoCodingManager is owned by this QGeoServiceProvider and should not
    be deleted separately. Users should assume that deleting the
    QGeoServiceProvider renders the pointer returned by this method invalid.

    After this function has been called, error() and errorString() will
    report any errors which occurred during the construction of the
    QGeoCodingManager.
*/
QGeoCodingManager *QGeoServiceProvider::geocodingManager() const
{
    return d_ptr->manager<QGeoCodingManager, QGeoCodingManagerEngine>(
               &(d_ptr->geocodeError), &(d_ptr->geocodeErrorString),
               &(d_ptr->geocodingManager));
}

/*!
    Returns the QGeoMappingManager made available by the service provider.

    This function will return 0 if the service provider does not provide
    any mapping services.

    This function will attempt to construct a QGeoMappingManager instance
    when it is called for the first time.  If the attempt is successful the
    QGeoMappingManager will be cached, otherwise each call of this function
    will attempt to construct a QGeoMappingManager instance until the
    construction is successful.

    The QGeoMappingManager is owned by this QGeoServiceProvider and should not
    be deleted separately. Users should assume that deleting the
    QGeoServiceProvider renders the pointer returned by this method invalid.

    After this function has been called, error() and errorString() will
    report any errors which occurred during the construction of the
    QGeoMappingManager.

    \internal
*/
QGeoMappingManager *QGeoServiceProvider::mappingManager() const
{
    return d_ptr->manager<QGeoMappingManager, QGeoMappingManagerEngine>(
               &(d_ptr->mappingError), &(d_ptr->mappingErrorString),
               &(d_ptr->mappingManager));
}

/*!
    Returns the QGeoRoutingManager made available by the service provider.

    This function will return 0 if the service provider does not provide
    any geographic routing services.

    This function will attempt to construct a QGeoRoutingManager instance
    when it is called for the first time.  If the attempt is successful the
    QGeoRoutingManager will be cached, otherwise each call of this function
    will attempt to construct a QGeoRoutingManager instance until the
    construction is successful.

    The QGeoRoutingManager is owned by this QGeoServiceProvider and should not
    be deleted separately. Users should assume that deleting the
    QGeoServiceProvider renders the pointer returned by this method invalid.

    After this function has been called, error() and errorString() will
    report any errors which occurred during the construction of the
    QGeoRoutingManager.
*/
QGeoRoutingManager *QGeoServiceProvider::routingManager() const
{
    return d_ptr->manager<QGeoRoutingManager, QGeoRoutingManagerEngine>(
               &(d_ptr->routingError), &(d_ptr->routingErrorString),
               &(d_ptr->routingManager));
}

/*!
    Returns the QPlaceManager made available by the service provider.

    This function will attempt to construct a QPlaceManager instance
    when it is called for the first time.  If the attempt is successful the
    QPlaceManager will be cached, otherwise each call of this function
    will attempt to construct a QPlace instance until the
    construction is successful.

    The QGeoPlaceManager is owned by this QGeoServiceProvider and should not
    be deleted separately. Users should assume that deleting the
    QGeoServiceProvider renders the pointer returned by this method invalid.

    After this function has been called, error() and errorString() will
    report any errors which occurred during the construction of the QPlaceManager.
*/
QPlaceManager *QGeoServiceProvider::placeManager() const
{
    return d_ptr->manager<QPlaceManager, QPlaceManagerEngine>(
               &(d_ptr->placeError), &(d_ptr->placeErrorString),
               &(d_ptr->placeManager));
}

/*!
    Returns an error code describing the error which occurred during the
    last operation that was performed by this class.
*/
QGeoServiceProvider::Error QGeoServiceProvider::error() const
{
    return d_ptr->error;
}

/*!
    Returns a string describing the error which occurred during the
    last operation that was performed by this class.
*/
QString QGeoServiceProvider::errorString() const
{
    return d_ptr->errorString;
}

/*!
    Sets whether experimental plugins are considered when locating the
    correct plugin library for this service provider to \a allow.

    \b {Important:} this will destroy any existing managers held by this
    service provider instance. You should be sure not to attempt to use any
    pointers that you have previously retrieved after calling this method.
*/
void QGeoServiceProvider::setAllowExperimental(bool allow)
{
    d_ptr->experimental = allow;
    d_ptr->unload();
    d_ptr->loadMeta();
}

/*!
    Sets the parameters used to construct individual manager classes for
    this service provider to \a parameters.

    Before the list of \a parameters is passed on to the to-be-loaded
    service provider, the list is filtered to avoid the sharing of provider specific
    parameters with unrelated service providers. Provider specific parameter
    keys must be prefixed with the provider name (e.g. \c here.app_id).

    \b {Important:} this will destroy any existing managers held by this
    service provider instance. You should be sure not to attempt to use any
    pointers that you have previously retrieved after calling this method.
*/
void QGeoServiceProvider::setParameters(const QVariantMap &parameters)
{
    d_ptr->parameterMap = parameters;
    d_ptr->unload();
    d_ptr->loadMeta();
}

/*!
    Sets the locale used by this service provider to \a locale. If the relevant features
    (see LocalizedMappingFeature etc), this will change the languages, units
    and other locale-specific attributes of the provider's data.
*/
void QGeoServiceProvider::setLocale(const QLocale &locale)
{
    d_ptr->locale = locale;
    d_ptr->localeSet = true;

    if (d_ptr->geocodingManager)
        d_ptr->geocodingManager->setLocale(locale);
    if (d_ptr->routingManager)
        d_ptr->routingManager->setLocale(locale);
    if (d_ptr->mappingManager)
        d_ptr->mappingManager->setLocale(locale);
    if (d_ptr->placeManager)
        d_ptr->placeManager->setLocale(locale);
}

/*******************************************************************************
*******************************************************************************/

QGeoServiceProviderPrivate::QGeoServiceProviderPrivate()
    : factory(0),
      experimental(false),
      geocodingManager(0),
      routingManager(0),
      mappingManager(0),
      placeManager(0),
      geocodeError(QGeoServiceProvider::NoError),
      routingError(QGeoServiceProvider::NoError),
      mappingError(QGeoServiceProvider::NoError),
      placeError(QGeoServiceProvider::NoError),
      error(QGeoServiceProvider::NoError),
      localeSet(false)
{
    metaData.insert(QStringLiteral("index"), -1);
}

QGeoServiceProviderPrivate::~QGeoServiceProviderPrivate()
{
    delete geocodingManager;
    delete routingManager;
    delete mappingManager;
    delete placeManager;
}

void QGeoServiceProviderPrivate::unload()
{
    delete geocodingManager;
    geocodingManager = 0;

    delete routingManager;
    routingManager = 0;

    delete mappingManager;
    mappingManager = 0;

    delete placeManager;
    placeManager = 0;

    factory = 0;
    error = QGeoServiceProvider::NoError;
    errorString = QLatin1String("");
    metaData = QJsonObject();
    metaData.insert(QStringLiteral("index"), -1);
}

/* Filter out any parameter that doesn't match any plugin */
void QGeoServiceProviderPrivate::filterParameterMap()
{
    const auto availablePlugins = QGeoServiceProviderPrivate::plugins();

    cleanedParameterMap = parameterMap;
    for (auto it = availablePlugins.keyBegin(), end = availablePlugins.keyEnd(); it != end; ++it) {
        if (*it == providerName) // don't remove parameters for current provider
            continue;

        QVariantMap::iterator i = cleanedParameterMap.begin();
        while (i != cleanedParameterMap.end()) {
            // remove every parameter meant for other plugins
            if (i.key().startsWith(QString(*it + QLatin1Char('.'))))
                i = cleanedParameterMap.erase(i);
            else
                ++i;
        }
    }
}

void QGeoServiceProviderPrivate::loadMeta()
{
    factory = 0;
    metaData = QJsonObject();
    metaData.insert(QStringLiteral("index"), -1);
    error = QGeoServiceProvider::NotSupportedError;
    errorString = QString(QLatin1String("The geoservices provider %1 is not supported.")).arg(providerName);

    QList<QJsonObject> candidates = QGeoServiceProviderPrivate::plugins().values(providerName);

    int versionFound = -1;
    int idx = -1;

    // figure out which version of the plugin we want
    // (always latest unless experimental)
    for (int i = 0; i < candidates.size(); ++i) {
        QJsonObject meta = candidates[i];
        if (meta.contains(QStringLiteral("Version"))
                && meta.value(QStringLiteral("Version")).isDouble()
                && meta.contains(QStringLiteral("Experimental"))
                && meta.value(QStringLiteral("Experimental")).isBool()) {
            int ver = int(meta.value(QStringLiteral("Version")).toDouble());
            if (ver > versionFound && !(!experimental && meta.value(QStringLiteral("Experimental")).toBool())) {
                versionFound = ver;
                idx = i;
            }
        }
    }

    if (idx != -1) {
        error = QGeoServiceProvider::NoError;
        errorString = QStringLiteral("");
        metaData = candidates[idx];
    }
}

void QGeoServiceProviderPrivate::loadPlugin(const QVariantMap &parameters)
{
    Q_UNUSED(parameters)

    if (int(metaData.value(QStringLiteral("index")).toDouble()) < 0) {
        error = QGeoServiceProvider::NotSupportedError;
        errorString = QString(QLatin1String("The geoservices provider is not supported."));
        factory = 0;
        return;
    }

    error = QGeoServiceProvider::NoError;
    errorString = QLatin1String("");

    int idx = int(metaData.value(QStringLiteral("index")).toDouble());

    // load the actual plugin
    factory = qobject_cast<QGeoServiceProviderFactory *>(loader()->instance(idx));
}

QHash<QString, QJsonObject> QGeoServiceProviderPrivate::plugins(bool reload)
{
    static QHash<QString, QJsonObject> plugins;
    static bool alreadyDiscovered = false;

    if (reload == true)
        alreadyDiscovered = false;

    if (!alreadyDiscovered) {
        loadPluginMetadata(plugins);
        alreadyDiscovered = true;
    }
    return plugins;
}

void QGeoServiceProviderPrivate::loadPluginMetadata(QHash<QString, QJsonObject> &list)
{
    QFactoryLoader *l = loader();
    QList<QJsonObject> meta = l->metaData();
    for (int i = 0; i < meta.size(); ++i) {
        QJsonObject obj = meta.at(i).value(QStringLiteral("MetaData")).toObject();
        obj.insert(QStringLiteral("index"), i);
        list.insertMulti(obj.value(QStringLiteral("Provider")).toString(), obj);
    }
}


QT_END_NAMESPACE