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@@ -71,169 +71,7 @@ QgsCoordinateReferenceSystem QgsJsonExporter::sourceCrs() const |
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QString QgsJsonExporter::exportFeature( const QgsFeature &feature, const QVariantMap &extraProperties, |
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const QVariant &id ) const |
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{ |
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QString s = QStringLiteral( "{\n \"type\":\"Feature\",\n" ); |
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// ID |
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s += QStringLiteral( " \"id\":%1,\n" ).arg( !id.isValid() ? QString::number( feature.id() ) : QgsJsonUtils::encodeValue( id ) ); |
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QgsGeometry geom = feature.geometry(); |
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if ( !geom.isNull() && mIncludeGeometry ) |
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{ |
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if ( mCrs.isValid() ) |
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{ |
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try |
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{ |
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QgsGeometry transformed = geom; |
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if ( transformed.transform( mTransform ) == 0 ) |
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geom = transformed; |
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} |
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catch ( QgsCsException &cse ) |
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{ |
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Q_UNUSED( cse ); |
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} |
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} |
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QgsRectangle box = geom.boundingBox(); |
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if ( QgsWkbTypes::flatType( geom.wkbType() ) != QgsWkbTypes::Point ) |
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{ |
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s += QStringLiteral( " \"bbox\":[%1, %2, %3, %4],\n" ).arg( qgsDoubleToString( box.xMinimum(), mPrecision ), |
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qgsDoubleToString( box.yMinimum(), mPrecision ), |
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qgsDoubleToString( box.xMaximum(), mPrecision ), |
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qgsDoubleToString( box.yMaximum(), mPrecision ) ); |
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} |
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s += QLatin1String( " \"geometry\":\n " ); |
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s += geom.asJson( mPrecision ); |
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s += QLatin1String( ",\n" ); |
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} |
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else |
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{ |
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s += QLatin1String( " \"geometry\":null,\n" ); |
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} |
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// build up properties element |
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QString properties; |
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int attributeCounter = 0; |
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if ( mIncludeAttributes || !extraProperties.isEmpty() ) |
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{ |
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//read all attribute values from the feature |
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if ( mIncludeAttributes ) |
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{ |
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QgsFields fields = mLayer ? mLayer->fields() : feature.fields(); |
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// List of formatters through we want to pass the values |
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QStringList formattersWhiteList; |
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formattersWhiteList << QStringLiteral( "KeyValue" ) |
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<< QStringLiteral( "List" ) |
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<< QStringLiteral( "ValueRelation" ) |
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<< QStringLiteral( "ValueMap" ); |
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for ( int i = 0; i < fields.count(); ++i ) |
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{ |
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if ( ( !mAttributeIndexes.isEmpty() && !mAttributeIndexes.contains( i ) ) || mExcludedAttributeIndexes.contains( i ) ) |
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continue; |
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if ( attributeCounter > 0 ) |
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properties += QLatin1String( ",\n" ); |
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QVariant val = feature.attributes().at( i ); |
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if ( mLayer ) |
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{ |
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QgsEditorWidgetSetup setup = fields.at( i ).editorWidgetSetup(); |
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QgsFieldFormatter *fieldFormatter = QgsApplication::fieldFormatterRegistry()->fieldFormatter( setup.type() ); |
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if ( formattersWhiteList.contains( fieldFormatter->id() ) ) |
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val = fieldFormatter->representValue( mLayer.data(), i, setup.config(), QVariant(), val ); |
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} |
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QString name = fields.at( i ).name(); |
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if ( mAttributeDisplayName ) |
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{ |
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name = mLayer->attributeDisplayName( i ); |
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} |
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properties += QStringLiteral( " \"%1\":%2" ).arg( name, QgsJsonUtils::encodeValue( val ) ); |
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++attributeCounter; |
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} |
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} |
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if ( !extraProperties.isEmpty() ) |
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{ |
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QVariantMap::const_iterator it = extraProperties.constBegin(); |
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for ( ; it != extraProperties.constEnd(); ++it ) |
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{ |
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if ( attributeCounter > 0 ) |
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properties += QLatin1String( ",\n" ); |
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properties += QStringLiteral( " \"%1\":%2" ).arg( it.key(), QgsJsonUtils::encodeValue( it.value() ) ); |
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++attributeCounter; |
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} |
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} |
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// related attributes |
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if ( mLayer && mIncludeRelatedAttributes ) |
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{ |
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QList< QgsRelation > relations = QgsProject::instance()->relationManager()->referencedRelations( mLayer.data() ); |
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const auto constRelations = relations; |
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for ( const QgsRelation &relation : constRelations ) |
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{ |
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if ( attributeCounter > 0 ) |
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properties += QLatin1String( ",\n" ); |
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QgsFeatureRequest req = relation.getRelatedFeaturesRequest( feature ); |
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req.setFlags( QgsFeatureRequest::NoGeometry ); |
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QgsVectorLayer *childLayer = relation.referencingLayer(); |
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QString relatedFeatureAttributes; |
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if ( childLayer ) |
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{ |
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QgsFeatureIterator it = childLayer->getFeatures( req ); |
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QVector<QVariant> attributeWidgetCaches; |
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int fieldIndex = 0; |
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const QgsFields fields = childLayer->fields(); |
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for ( const QgsField &field : fields ) |
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{ |
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QgsEditorWidgetSetup setup = field.editorWidgetSetup(); |
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QgsFieldFormatter *fieldFormatter = QgsApplication::fieldFormatterRegistry()->fieldFormatter( setup.type() ); |
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attributeWidgetCaches.append( fieldFormatter->createCache( childLayer, fieldIndex, setup.config() ) ); |
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fieldIndex++; |
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} |
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QgsFeature relatedFet; |
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int relationFeatures = 0; |
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while ( it.nextFeature( relatedFet ) ) |
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{ |
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if ( relationFeatures > 0 ) |
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relatedFeatureAttributes += QLatin1String( ",\n" ); |
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relatedFeatureAttributes += QgsJsonUtils::exportAttributes( relatedFet, childLayer, attributeWidgetCaches ); |
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relationFeatures++; |
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} |
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} |
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relatedFeatureAttributes.prepend( '[' ).append( ']' ); |
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properties += QStringLiteral( " \"%1\":%2" ).arg( relation.name(), relatedFeatureAttributes ); |
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attributeCounter++; |
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} |
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} |
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} |
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bool hasProperties = attributeCounter > 0; |
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s += QLatin1String( " \"properties\":" ); |
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if ( hasProperties ) |
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{ |
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//read all attribute values from the feature |
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s += "{\n" + properties + "\n }\n"; |
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} |
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else |
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{ |
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s += QLatin1String( "null\n" ); |
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} |
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s += '}'; |
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return s; |
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return QString::fromStdString( exportFeatureToJsonObject( feature, extraProperties, id ).dump() ); |
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} |
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json QgsJsonExporter::exportFeatureToJsonObject( const QgsFeature &feature, const QVariantMap &extraProperties, const QVariant &id ) const |
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