qgsjsonutils.h

Go to the documentation of this file.

/***************************************************************************
    qgsjsonutils.h
     -------------
    Date                 : May 206
    Copyright            : (C) 2016 Nyall Dawson
    Email                : nyall dot dawson 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 QGSJSONUTILS_H
#define QGSJSONUTILS_H
 
#include "qgis_core.h"
#include "qgsfeature.h"
#include "qgscoordinatereferencesystem.h"
#include "qgscoordinatetransform.h"
#include "qgsfields.h"
 
#include <QPointer>
#include <QJsonObject>
 
class QTextCodec;
 
class CORE_EXPORT QgsJsonExporter
{
  public:
 
    QgsJsonExporter( QgsVectorLayer *vectorLayer = nullptr, int precision = 6 );
 
    void setPrecision( int precision ) { mPrecision = precision; }
 
    int precision() const { return mPrecision; }
 
    void setIncludeGeometry( bool includeGeometry ) { mIncludeGeometry = includeGeometry; }
 
    bool includeGeometry() const { return mIncludeGeometry; }
 
    void setIncludeAttributes( bool includeAttributes ) { mIncludeAttributes = includeAttributes; }
 
    bool includeAttributes() const { return mIncludeAttributes; }
 
    void setIncludeRelated( bool includeRelated ) { mIncludeRelatedAttributes = includeRelated; }
 
    bool includeRelated() const { return mIncludeRelatedAttributes; }
 
    void setAttributeDisplayName( bool displayName ) { mAttributeDisplayName = displayName; }
 
    bool attributeDisplayName() const { return mAttributeDisplayName; }
 
    void setVectorLayer( QgsVectorLayer *vectorLayer );
 
    QgsVectorLayer *vectorLayer() const;
 
    void setSourceCrs( const QgsCoordinateReferenceSystem &crs );
 
    QgsCoordinateReferenceSystem sourceCrs() const;
 
    void setTransformGeometries( bool activate ) { mTransformGeometries = activate; }
 
    void setAttributes( const QgsAttributeList &attributes ) { mAttributeIndexes = attributes; }
 
    QgsAttributeList attributes() const { return mAttributeIndexes; }
 
    void setExcludedAttributes( const QgsAttributeList &attributes ) { mExcludedAttributeIndexes = attributes; }
 
    QgsAttributeList excludedAttributes() const { return mExcludedAttributeIndexes; }
 
    QString exportFeature( const QgsFeature &feature,
                           const QVariantMap &extraProperties = QVariantMap(),
                           const QVariant &id = QVariant(),
                           int indent = -1 ) const;
 
    json exportFeatureToJsonObject( const QgsFeature &feature,
                                    const QVariantMap &extraProperties = QVariantMap(),
                                    const QVariant &id = QVariant() ) const SIP_SKIP;
 
 
    QString exportFeatures( const QgsFeatureList &features, int indent = -1 ) const;
 
    json exportFeaturesToJsonObject( const QgsFeatureList &features ) const SIP_SKIP;
 
  private:
 
    int mPrecision;
 
    QgsAttributeList mAttributeIndexes;
 
    QgsAttributeList mExcludedAttributeIndexes;
 
    bool mIncludeGeometry = true;
 
    bool mIncludeAttributes = true;
 
    bool mIncludeRelatedAttributes = false;
 
    QPointer< QgsVectorLayer > mLayer;
 
    QgsCoordinateReferenceSystem mCrs;
 
    QgsCoordinateTransform mTransform;
 
    bool mAttributeDisplayName = false;
 
    bool mTransformGeometries = true;
};
 
class CORE_EXPORT QgsJsonUtils
{
    Q_GADGET
 
  public:
 
    static QgsFeatureList stringToFeatureList( const QString &string, const QgsFields &fields = QgsFields(), QTextCodec *encoding = nullptr );
 
    static QgsFields stringToFields( const QString &string, QTextCodec *encoding = nullptr );
 
    Q_INVOKABLE static QString encodeValue( const QVariant &value );
 
    static QString exportAttributes( const QgsFeature &feature, QgsVectorLayer *layer = nullptr,
                                     const QVector<QVariant> &attributeWidgetCaches = QVector<QVariant>() );
 
    static json exportAttributesToJsonObject( const QgsFeature &feature, QgsVectorLayer *layer = nullptr,
        const QVector<QVariant> &attributeWidgetCaches = QVector<QVariant>() ) SIP_SKIP;
 
    Q_INVOKABLE static QVariantList parseArray( const QString &json, QVariant::Type type = QVariant::Invalid );
 
 
    static json jsonFromVariant( const QVariant &v ) SIP_SKIP;
 
    static QVariant parseJson( const std::string &jsonString ) SIP_SKIP;
 
    static QVariant parseJson( const std::string &jsonString, QString &error ) SIP_SKIP;
 
    static QVariant parseJson( const QString &jsonString ) SIP_SKIP;
 
};
 
#endif // QGSJSONUTILS_H