qgseptpointcloudindex.h

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/***************************************************************************
                         qgspointcloudindex.h
                         --------------------
    begin                : October 2020
    copyright            : (C) 2020 by Peter Petrik
    email                : zilolv at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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 QGSEPTPOINTCLOUDINDEX_H
#define QGSEPTPOINTCLOUDINDEX_H
 
#include <QObject>
#include <QString>
#include <QHash>
#include <QStringList>
#include <QVector>
#include <QList>
#include <QFile>
 
#include "qgspointcloudindex.h"
#include "qgis_sip.h"
 
#define SIP_NO_FILE
 
class QgsCoordinateReferenceSystem;
 
class CORE_EXPORT QgsEptPointCloudIndex: public QgsPointCloudIndex
{
    Q_OBJECT
  public:
 
    explicit QgsEptPointCloudIndex();
    ~QgsEptPointCloudIndex();
 
    std::unique_ptr<QgsPointCloudIndex> clone() const override;
 
    void load( const QString &fileName ) override;
 
    std::unique_ptr<QgsPointCloudBlock> nodeData( const IndexedPointCloudNode &n, const QgsPointCloudRequest &request ) override;
    QgsPointCloudBlockRequest *asyncNodeData( const IndexedPointCloudNode &n, const QgsPointCloudRequest &request ) override;
    bool hasNode( const IndexedPointCloudNode &n ) const override;
 
    QgsCoordinateReferenceSystem crs() const override;
    qint64 pointCount() const override;
    virtual qint64 nodePointCount( const IndexedPointCloudNode &n ) const override;
    bool hasStatisticsMetadata() const override;
    QVariant metadataStatistic( const QString &attribute, Qgis::Statistic statistic ) const override;
    QVariantList metadataClasses( const QString &attribute ) const override;
    QVariant metadataClassStatistic( const QString &attribute, const QVariant &value, Qgis::Statistic statistic ) const override;
    QVariantMap originalMetadata() const override { return mOriginalMetadata; }
 
    bool isValid() const override;
    QgsPointCloudIndex::AccessType accessType() const override;
 
    void copyCommonProperties( QgsEptPointCloudIndex *destination ) const;
 
  protected:
    bool loadSchema( const QByteArray &dataJson );
    void loadManifest( const QByteArray &manifestJson );
    bool loadSchema( QFile &f );
    bool loadSingleNodeHierarchy( const IndexedPointCloudNode &nodeId ) const;
    QVector<IndexedPointCloudNode> nodePathToRoot( const IndexedPointCloudNode &nodeId ) const;
    bool loadNodeHierarchy( const IndexedPointCloudNode &nodeId ) const;
 
    bool mIsValid = false;
    QgsPointCloudIndex::AccessType mAccessType = Local;
    QString mDataType;
    QString mWkt;
 
    QString mUrlDirectoryPart;
 
    mutable QSet<IndexedPointCloudNode> mHierarchyNodes;
 
    qint64 mPointCount = 0;
 
    struct AttributeStatistics
    {
      int count = -1;
      QVariant minimum;
      QVariant maximum;
      double mean = std::numeric_limits< double >::quiet_NaN();
      double stDev = std::numeric_limits< double >::quiet_NaN();
      double variance = std::numeric_limits< double >::quiet_NaN();
    };
 
    QMap< QString, AttributeStatistics > mMetadataStats;
 
    QMap< QString, QMap< int, int > > mAttributeClasses;
    QVariantMap mOriginalMetadata;
};
 
#endif // QGSEPTPOINTCLOUDINDEX_H