qgsfeaturepool.h

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/***************************************************************************
 *  qgsfeaturepool.h                                                       *
 *  -------------------                                                    *
 *  copyright            : (C) 2014 by Sandro Mani / Sourcepole AG         *
 *  email                : [email protected]                             *
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGS_FEATUREPOOL_H
#define QGS_FEATUREPOOL_H
 
#include "qgis_analysis.h"
#include "qgsfeature.h"
#include "qgsfeaturesink.h"
#include "qgsspatialindex.h"
#include "qgsvectorlayerfeatureiterator.h"
 
#include <QCache>
#include <QMutex>
#include <QPointer>

class ANALYSIS_EXPORT QgsFeaturePool : public QgsFeatureSink SIP_ABSTRACT
{
  public:

    QgsFeaturePool( QgsVectorLayer *layer );
    ~QgsFeaturePool() override = default;

    bool getFeature( QgsFeatureId id, QgsFeature &feature );

    QgsFeatureIds getFeatures( const QgsFeatureRequest &request, QgsFeedback *feedback = nullptr ) SIP_SKIP;

    virtual void updateFeature( QgsFeature &feature ) = 0;

    virtual void deleteFeature( QgsFeatureId fid ) = 0;

    QgsFeatureIds allFeatureIds() const SIP_SKIP;

    QgsFeatureIds getIntersects( const QgsRectangle &rect ) const SIP_SKIP;

    QgsVectorLayer *layer() const;

    QPointer<QgsVectorLayer> layerPtr() const SIP_SKIP;

    QString layerId() const;

    Qgis::GeometryType geometryType() const;

    QgsCoordinateReferenceSystem crs() const;

    QString layerName() const;
 
  protected:

    void insertFeature( const QgsFeature &feature, bool skipLock = false );

    void refreshCache( QgsFeature feature, const QgsFeature &origFeature );

    void removeFeature( const QgsFeatureId featureId );

    void setFeatureIds( const QgsFeatureIds &ids ) SIP_SKIP;

    bool isFeatureCached( QgsFeatureId fid ) SIP_SKIP;
 
  private:
#ifdef SIP_RUN
    QgsFeaturePool( const QgsFeaturePool &other )
    {}
#endif
 
    static const int CACHE_SIZE = 1000;
    QCache<QgsFeatureId, QgsFeature> mFeatureCache;
    QPointer<QgsVectorLayer> mLayer;
    mutable QReadWriteLock mCacheLock;
    QgsFeatureIds mFeatureIds;
    QgsSpatialIndex mIndex;
    Qgis::GeometryType mGeometryType;
    std::unique_ptr<QgsVectorLayerFeatureSource> mFeatureSource;
    QString mLayerId;
    QString mLayerName;
    QgsCoordinateReferenceSystem mCrs;

    QHash<QgsFeatureId, QgsFeature> mUpdatedFeatures;
 
    friend class TestQgsVectorLayerFeaturePool;
};
 
#endif // QGS_FEATUREPOOL_H