v0.2.53..v0.2.54 changeset RemoveDuplicateAreasVisitor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/visitors/RemoveDuplicateAreasVisitor.h b/hoot-core/src/main/cpp/hoot/core/visitors/RemoveDuplicateAreasVisitor.h
new file mode 100644
index 0000000..5c837eb
--- /dev/null
+++ b/hoot-core/src/main/cpp/hoot/core/visitors/RemoveDuplicateAreasVisitor.h
@@ -0,0 +1,91 @@
+/*
+ * This file is part of Hootenanny.
+ *
+ * Hootenanny 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --------------------------------------------------------------------
+ *
+ * The following copyright notices are generated automatically. If you
+ * have a new notice to add, please use the format:
+ * " * @copyright Copyright ..."
+ * This will properly maintain the copyright information. DigitalGlobe
+ * copyrights will be updated automatically.
+ *
+ * @copyright Copyright (C) 2015, 2017, 2018, 2019, 2020 DigitalGlobe (http://www.digitalglobe.com/)
+ */
+#ifndef REMOVEDUPLICATEAREASVISITOR_H
+#define REMOVEDUPLICATEAREASVISITOR_H
+
+// Hoot
+#include <hoot/core/visitors/ElementOsmMapVisitor.h>
+
+// geos
+#include <geos/geom/Geometry.h>
+
+namespace hoot
+{
+
+class TagDifferencer;
+
+/**
+ * Locates area elements that are duplicates and removes one of the duplicates. An area is
+ * considered a duplicate if:
+ *  - The status is the same (e.g. Unknown1 == Unknown1)
+ *  - One element is not an ancestor of the other
+ *  - The overlap of the two geometries is equal (with reasonable precision)
+ *  - Neither element has an area of zero.
+ *  - TagComparator::compareTags() returns 1.0.
+ *
+ * The element with the smaller number of tags will be deleted. If they have the same number of tags
+ * then the element with the smaller id is deleted.
+ *
+ * RecursiveElementRemover is used to remove the element.
+ */
+class RemoveDuplicateAreasVisitor : public ElementOsmMapVisitor
+{
+public:
+
+  static std::string className() { return "hoot::RemoveDuplicateAreasVisitor"; }
+
+  RemoveDuplicateAreasVisitor();
+
+  virtual void visit(const std::shared_ptr<Element>& e) override;
+
+  virtual QString getInitStatusMessage() const { return "Removing duplicate areas..."; }
+
+  virtual QString getCompletedStatusMessage() const
+  { return "Removed " + QString::number(_numAffected) + " duplicate areas"; }
+
+  virtual QString getDescription() const { return "Removes duplicate areas"; }
+
+  /**
+   * @see FilteredByCriteria
+   */
+  virtual QStringList getCriteria() const;
+
+  virtual std::string getClassName() const { return className(); }
+
+private:
+
+  std::shared_ptr<TagDifferencer> _diff;
+  QHash<ElementId, std::shared_ptr<geos::geom::Geometry>> _geoms;
+
+  std::shared_ptr<geos::geom::Geometry> _convertToGeometry(const std::shared_ptr<Element>& e1);
+  bool _equals(const std::shared_ptr<Element>& e1, const std::shared_ptr<Element>& e2);
+  void _removeOne(const std::shared_ptr<Element>& e1, const std::shared_ptr<Element>& e2);
+};
+
+}
+
+#endif // REMOVEDUPLICATEAREASVISITOR_H