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class QgsVectorLayerJoinBuffer
{
%TypeHeaderCode
#include <qgsvectorlayerjoinbuffer.h>
%End
public:
QgsVectorLayerJoinBuffer();
~QgsVectorLayerJoinBuffer();
/**Joins another vector layer to this layer
@param joinInfo join object containing join layer id, target and source field */
void addJoin( const QgsVectorJoinInfo& joinInfo );
/**Removes a vector layer join*/
void removeJoin( const QString& joinLayerId );
/**Updates field map with joined attributes
@param fields map to append joined attributes
*/
void updateFields( QgsFields& fields );
/**Calls cacheJoinLayer() for all vector joins*/
void createJoinCaches();
/**Saves mVectorJoins to xml under the layer node*/
void writeXml( QDomNode& layer_node, QDomDocument& document ) const;
/**Reads joins from project file*/
void readXml( const QDomNode& layer_node );
/**Quick way to test if there is any join at all*/
bool containsJoins() const;
const QList< QgsVectorJoinInfo >& vectorJoins() const;
/**Finds the vector join for a layer field index.
@param index this layers attribute index
@param fields fields of the vector layer (including joined fields)
@param sourceFieldIndex Output: field's index in source layer */
const QgsVectorJoinInfo* joinForFieldIndex( int index, const QgsFields& fields, int& sourceFieldIndex /Out/ ) const;
};
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