QgsVectorLayerJoinBuffer inherits from QgsFeatureSink

python/core/qgsvectorlayerjoinbuffer.sip

@@ -14,7 +14,7 @@
 typedef QList< QgsVectorLayerJoinInfo > QgsVectorJoinList;
 
 
-class QgsVectorLayerJoinBuffer : QObject
+class QgsVectorLayerJoinBuffer : QObject, QgsFeatureSink
 {
 %Docstring
  Manages joined fields for a vector layer*
@@ -132,23 +132,8 @@ Quick way to test if there is any join at all
  :rtype: QgsVectorLayerJoinBuffer
 %End
 
-    bool addFeature( const QgsFeature &feature ) const;
+    virtual bool addFeatures( QgsFeatureList &features, QgsFeatureSink::Flags flags = 0 );
-%Docstring
- Adds a feature in joined layers. The feature given in parameter is the
- one added in target layer. If a corresponding joined feature yet exists
- in a joined layer, then this feature is just updated. Note that if a
- corresponding joined feature has only empty fields, then it's not
- created nor added.
 
- \param feature The feature added in the target layer.
-
- :return: false if an error happened, true otherwise
-
-.. versionadded:: 3.0
- :rtype: bool
-%End
-
-    bool addFeatures( const QgsFeatureList &features ) const;
 %Docstring
  Adds a list of features in joined layers. Features given in parameter
  are those added in target layer. If a corresponding joined feature yet
@@ -157,6 +142,7 @@ Quick way to test if there is any join at all
  created nor added.
 
  \param features The list of features added in the target layer
+ \param flags Unused parameter
 
  :return: false if an error happened, true otherwise
 
@@ -164,7 +150,7 @@ Quick way to test if there is any join at all
  :rtype: bool
 %End
 
-    bool changeAttributeValue( QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue = QVariant() ) const;
+    bool changeAttributeValue( QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue = QVariant() );
 %Docstring
  Changes attribute value in joined layers. The feature id given in
  parameter is the one added in target layer. If the corresponding joined

src/core/qgsvectorlayerjoinbuffer.cpp

@@ -135,7 +135,6 @@ void QgsVectorLayerJoinBuffer::cacheJoinLayer( QgsVectorLayerJoinInfo &joinInfo
 
     QgsFeatureRequest request;
     request.setFlags( QgsFeatureRequest::NoGeometry );
-
     // maybe user requested just a subset of layer's attributes
     // so we do not have to cache everything
     bool hasSubset = joinInfo.joinFieldNamesSubset();
@@ -518,12 +517,7 @@ void QgsVectorLayerJoinBuffer::connectJoinedLayer( QgsVectorLayer *vl )
   connect( vl, &QgsVectorLayer::willBeDeleted, this, &QgsVectorLayerJoinBuffer::joinedLayerWillBeDeleted, Qt::UniqueConnection );
 }
 
-bool QgsVectorLayerJoinBuffer::addFeature( const QgsFeature &feature ) const
+bool QgsVectorLayerJoinBuffer::addFeatures( QgsFeatureList &features, QgsFeatureSink::Flags )
-{
-  return addFeatures( QgsFeatureList() << feature );
-}
-
-bool QgsVectorLayerJoinBuffer::addFeatures( const QgsFeatureList &features ) const
 {
   if ( !containsJoins() )
     return false;
@@ -598,7 +592,7 @@ bool QgsVectorLayerJoinBuffer::addFeatures( const QgsFeatureList &features ) con
   return true;
 }
 
-bool QgsVectorLayerJoinBuffer::changeAttributeValue( QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue ) const
+bool QgsVectorLayerJoinBuffer::changeAttributeValue( QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue )
 {
   if ( mLayer->fields().fieldOrigin( field ) != QgsFields::OriginJoin )
     return false;

src/core/qgsvectorlayerjoinbuffer.h

@@ -31,7 +31,7 @@ typedef QList< QgsVectorLayerJoinInfo > QgsVectorJoinList;
 
 /** \ingroup core
  * Manages joined fields for a vector layer*/
-class CORE_EXPORT QgsVectorLayerJoinBuffer : public QObject
+class CORE_EXPORT QgsVectorLayerJoinBuffer : public QObject, public QgsFeatureSink
 {
     Q_OBJECT
   public:
@@ -109,21 +109,6 @@ class CORE_EXPORT QgsVectorLayerJoinBuffer : public QObject
     //! \since QGIS 2.6
     QgsVectorLayerJoinBuffer *clone() const SIP_FACTORY;
 
-    /**
-     * Adds a feature in joined layers. The feature given in parameter is the
-     * one added in target layer. If a corresponding joined feature yet exists
-     * in a joined layer, then this feature is just updated. Note that if a
-     * corresponding joined feature has only empty fields, then it's not
-     * created nor added.
-     *
-     * \param feature The feature added in the target layer.
-     *
-     * \returns false if an error happened, true otherwise
-     *
-     * \since QGIS 3.0
-     */
-    bool addFeature( const QgsFeature &feature ) const;
-
     /**
      * Adds a list of features in joined layers. Features given in parameter
      * are those added in target layer. If a corresponding joined feature yet
@@ -132,12 +117,13 @@ class CORE_EXPORT QgsVectorLayerJoinBuffer : public QObject
      * created nor added.
      *
      * \param features The list of features added in the target layer
+     * \param flags Unused parameter
      *
      * \returns false if an error happened, true otherwise
      *
      * \since QGIS 3.0
      */
-    bool addFeatures( const QgsFeatureList &features ) const;
+    bool addFeatures( QgsFeatureList &features, QgsFeatureSink::Flags flags = 0 ) override;
 
     /**
      * Changes attribute value in joined layers. The feature id given in
@@ -154,7 +140,7 @@ class CORE_EXPORT QgsVectorLayerJoinBuffer : public QObject
      *
      * \since QGIS 3.0
      */
-    bool changeAttributeValue( QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue = QVariant() ) const;
+    bool changeAttributeValue( QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue = QVariant() );
 
     /**
      * Deletes a feature from joined layers. The feature id given in