/usr/include/qgis/qgsvectorlayerjoinbuffer.h is in libqgis-dev 2.0.1-2build2.
This file is owned by root:root, with mode 0o644.
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qgsvectorlayerjoinbuffer.h
---------------------------
begin : Feb 09, 2011
copyright : (C) 2011 by Marco Hugentobler
email : marco dot hugentobler at sourcepole dot ch
***************************************************************************/
/***************************************************************************
* *
* 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 QGSVECTORLAYERJOINBUFFER_H
#define QGSVECTORLAYERJOINBUFFER_H
#include "qgsfeature.h"
#include "qgsvectorlayer.h"
#include <QHash>
#include <QString>
/**Manages joined fields for a vector layer*/
class CORE_EXPORT QgsVectorLayerJoinBuffer
{
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 { return !mVectorJoins.isEmpty(); }
const QList< QgsVectorJoinInfo >& vectorJoins() const { return mVectorJoins; }
/**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 ) const;
private:
/**Joined vector layers*/
QList< QgsVectorJoinInfo > mVectorJoins;
/**Caches attributes of join layer in memory if QgsVectorJoinInfo.memoryCache is true (and the cache is not already there)*/
void cacheJoinLayer( QgsVectorJoinInfo& joinInfo );
};
#endif // QGSVECTORLAYERJOINBUFFER_H
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