Add a QgsFeatureSink interface for classes which accept adding features

python/core/core.sip

@@ -56,6 +56,7 @@
 %Include qgsfeaturefilterprovider.sip
 %Include qgsfeatureiterator.sip
 %Include qgsfeaturerequest.sip
+%Include qgsfeaturesink.sip
 %Include qgsfeedback.sip
 %Include qgsfield.sip
 %Include qgsfieldconstraints.sip

python/core/qgsfeaturesink.sip

@@ -0,0 +1,49 @@
+/************************************************************************
+ * This file has been generated automatically from                      *
+ *                                                                      *
+ * src/core/qgsfeaturesink.h                                            *
+ *                                                                      *
+ * Do not edit manually ! Edit header and run scripts/sipify.pl again   *
+ ************************************************************************/
+
+
+
+
+class QgsFeatureSink
+{
+%Docstring
+ An interface for objects which accept features via addFeature(s) methods.
+
+.. versionadded:: 3.0
+%End
+
+%TypeHeaderCode
+#include "qgsfeaturesink.h"
+%End
+  public:
+
+    virtual ~QgsFeatureSink();
+
+    virtual bool addFeature( QgsFeature &feature ) = 0;
+%Docstring
+ Adds a single ``feature`` to the sink.
+ \see addFeatures()
+ :rtype: bool
+%End
+
+    virtual bool addFeatures( QgsFeatureList &features ) = 0;
+%Docstring
+ Adds a list of ``features`` to the sink.
+ \see addFeature()
+ :rtype: bool
+%End
+
+};
+
+/************************************************************************
+ * This file has been generated automatically from                      *
+ *                                                                      *
+ * src/core/qgsfeaturesink.h                                            *
+ *                                                                      *
+ * Do not edit manually ! Edit header and run scripts/sipify.pl again   *
+ ************************************************************************/

src/core/CMakeLists.txt

@@ -720,6 +720,7 @@ SET(QGIS_CORE_HDRS
   qgsfeaturefilterprovider.h
   qgsfeatureiterator.h
   qgsfeaturerequest.h
+  qgsfeaturesink.h
   qgsfeaturestore.h
   qgsfieldformatter.h
   qgsfield_p.h

src/core/qgsfeaturesink.h

@@ -0,0 +1,52 @@
+/***************************************************************************
+                         qgsfeaturesink.h
+                         ----------------
+    begin                : April 2017
+    copyright            : (C) 2017 by 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 QGSFEATURESINK_H
+#define QGSFEATURESINK_H
+
+#include "qgis_core.h"
+#include "qgis.h"
+#include "qgsfeature.h"
+
+/**
+ * \class QgsFeatureSink
+ * \ingroup core
+ * An interface for objects which accept features via addFeature(s) methods.
+ *
+ * \since QGIS 3.0
+ */
+class CORE_EXPORT QgsFeatureSink
+{
+  public:
+
+    virtual ~QgsFeatureSink() = default;
+
+    /**
+     * Adds a single \a feature to the sink.
+     * \see addFeatures()
+     */
+    virtual bool addFeature( QgsFeature &feature ) = 0;
+
+    /**
+     * Adds a list of \a features to the sink.
+     * \see addFeature()
+     */
+    virtual bool addFeatures( QgsFeatureList &features ) = 0;
+
+};
+
+#endif // QGSFEATURESINK_H