+#include "SketchPlugin_Sketch.h"
+#include <ModelAPI_Document.h>
+#include <ModelAPI_Data.h>
+#include <ModelAPI_Object.h>
+#include <ModelAPI_ResultConstruction.h>
+
+/// It is important.
+///
+/// Before writing a new method implementation in this file, please check the next rule:
+/// exported public methods must not be implemented in this source file. They should be inline and
+/// placed in the header file.
+/// Because it leads to the runtime problem on the Linux OS.
+///
+/// The reason is that this is an abstract interface. An interface of this class can be used in
+/// outside libraries through casting without a link to the current library.
+
+SketchPlugin_Feature::SketchPlugin_Feature()
+{
+ mySketch = 0;
+}
+
+SketchPlugin_Sketch* SketchPlugin_Feature::sketch()
+{
+ if (!mySketch) {
+ // find sketch that references to this feature
+ const std::set<AttributePtr>& aBackRefs = data()->refsToMe();
+ std::set<AttributePtr>::const_iterator aBackRef = aBackRefs.begin();
+ for(; aBackRef != aBackRefs.end(); aBackRef++) {
+ std::shared_ptr<SketchPlugin_Sketch> aSketch =
+ std::dynamic_pointer_cast<SketchPlugin_Sketch>((*aBackRef)->owner());
+ if (aSketch) {
+ mySketch = aSketch.get();
+ break;
+ }
+ }
+ }
+ return mySketch;
+}