QGIS API Documentation  3.26.3-Buenos Aires (65e4edfdad)
qgsalgorithmdetectdatasetchanges.h
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1 /***************************************************************************
2  qgsalgorithmdetectdatasetchanges.h
3  ---------------------------------------
4  begin : December 2019
5  copyright : (C) 2019 by Nyall Dawson
6  email : nyall dot dawson at gmail dot com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSALGORITHMDETECTDATASETCHANGES_H
19 #define QGSALGORITHMDETECTDATASETCHANGES_H
20 
21 #define SIP_NO_FILE
22 
23 #include "qgis_sip.h"
24 #include "qgsprocessingalgorithm.h"
25 #include "qgsapplication.h"
27 
29 
33 class QgsDetectVectorChangesAlgorithm : public QgsProcessingAlgorithm
34 {
35 
36  public:
37 
38  QgsDetectVectorChangesAlgorithm() = default;
39  void initAlgorithm( const QVariantMap &configuration = QVariantMap() ) override;
40  QString name() const override;
41  QString displayName() const override;
42  QStringList tags() const override;
43  QString group() const override;
44  QString groupId() const override;
45  QString shortHelpString() const override;
46  QString shortDescription() const override;
47  QgsDetectVectorChangesAlgorithm *createInstance() const override SIP_FACTORY;
48 
49  protected:
50 
51  bool prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
52  QVariantMap processAlgorithm( const QVariantMap &parameters,
53  QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
54 
55  private:
56 
57  enum GeometryMatchType
58  {
59  Exact,
60  Topological
61  };
62 
63  std::unique_ptr< QgsProcessingFeatureSource > mOriginal;
64  std::unique_ptr< QgsProcessingFeatureSource > mRevised;
65  QStringList mFieldsToCompare;
66  QList< int > mOriginalFieldsToCompareIndices;
67  QList< int > mRevisedFieldsToCompareIndices;
68 
69  GeometryMatchType mMatchType = Topological;
70 
71 
72 };
73 
75 
76 #endif // QGSALGORITHMDETECTDATASETCHANGES_H
77 
78 
QgsProcessingAlgorithm::shortDescription
virtual QString shortDescription() const
Returns an optional translated short description of the algorithm.
Definition: qgsprocessingalgorithm.cpp:60
QgsProcessingAlgorithm::displayName
virtual QString displayName() const =0
Returns the translated algorithm name, which should be used for any user-visible display of the algor...
QgsProcessingFeedback
Base class for providing feedback from a processing algorithm.
Definition: qgsprocessingfeedback.h:37
QgsProcessingAlgorithm::groupId
virtual QString groupId() const
Returns the unique ID of the group this algorithm belongs to.
Definition: qgsprocessingalgorithm.h:234
QgsProcessingAlgorithm::createInstance
virtual QgsProcessingAlgorithm * createInstance() const =0
Creates a new instance of the algorithm class.
QgsProcessingAlgorithm::prepareAlgorithm
virtual bool prepareAlgorithm(const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback) SIP_THROW(QgsProcessingException)
Prepares the algorithm to run using the specified parameters.
Definition: qgsprocessingalgorithm.cpp:451
SIP_FACTORY
#define SIP_FACTORY
Definition: qgis_sip.h:76
qgsapplication.h
QgsProcessingAlgorithm::name
virtual QString name() const =0
Returns the algorithm name, used for identifying the algorithm.
QgsProcessingAlgorithm::processAlgorithm
virtual QVariantMap processAlgorithm(const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback) SIP_THROW(QgsProcessingException)=0
Runs the algorithm using the specified parameters.
QgsProcessingContext
Contains information about the context in which a processing algorithm is executed.
Definition: qgsprocessingcontext.h:46
qgsprocessingalgorithm.h
qgis_sip.h
QgsProcessingAlgorithm::shortHelpString
virtual QString shortHelpString() const
Returns a localised short helper string for the algorithm.
Definition: qgsprocessingalgorithm.cpp:65
qgsvectorlayerfeatureiterator.h
QgsProcessingAlgorithm
Abstract base class for processing algorithms.
Definition: qgsprocessingalgorithm.h:52
QgsProcessingAlgorithm::group
virtual QString group() const
Returns the name of the group this algorithm belongs to.
Definition: qgsprocessingalgorithm.h:225
QgsProcessingAlgorithm::tags
virtual QStringList tags() const
Returns a list of tags which relate to the algorithm, and are used to assist users in searching for s...
Definition: qgsprocessingalgorithm.h:181
QgsProcessingAlgorithm::initAlgorithm
virtual void initAlgorithm(const QVariantMap &configuration=QVariantMap())=0
Initializes the algorithm using the specified configuration.