v0.2.54..v0.2.55 changeset SuperfluousConflateOpRemover.h

diff --git a/hoot-core/src/main/cpp/hoot/core/conflate/SuperfluousConflateOpRemover.h b/hoot-core/src/main/cpp/hoot/core/conflate/SuperfluousConflateOpRemover.h
new file mode 100644
index 0000000..fb1efc6
--- /dev/null
+++ b/hoot-core/src/main/cpp/hoot/core/conflate/SuperfluousConflateOpRemover.h
@@ -0,0 +1,85 @@
+/*
+ * 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) 2020 DigitalGlobe (http://www.digitalglobe.com/)
+ */
+#ifndef SUPERFLUOUS_CONFLATE_OP_REMOVER_H
+#define SUPERFLUOUS_CONFLATE_OP_REMOVER_H
+
+// Qt
+#include <QStringList>
+
+namespace hoot
+{
+
+/**
+ * This is used to weed down the list of conflate pre/post ops to only those needed given the
+ * matchers being run for the conflate job.
+ *
+ * So for instance, you don't try to split road intersections if you're only conflating buildings.
+ * Only GeometryTypeCriterion are checked via FilteredByGeometryTypeCriteria. Not sure if this can
+ * be extended to check supported matchers for given other types of criteria.
+ */
+class SuperfluousConflateOpRemover
+{
+public:
+
+  /**
+   * Changes the global state of conflate pre/post ops by removing any that are unnecessary for the
+   * current conflate configuration
+   */
+  static void removeSuperfluousOps();
+
+private:
+
+  // cache supported GeometryTypeCriterion class names to avoid instantiating them unnecessarily
+  // when checking multiple ops
+  static QSet<QString> _geometryTypeClassNameCache;
+
+  /*
+   * Given a list of supported geometry type criteria, remove all conflate ops (map ops and
+   * visitors) that don't support the associated geometry
+   *
+   * @param geometryTypeCrits a list of all ElementCriterion class names associated with the current
+   * matcher config
+   * @param ops a list of operator class names to be filtered
+   * @param removedOps a list of the operators removed
+   * @return the input operator list with unnecessary ops filtered out
+   */
+  static QStringList _filterOutUnneededOps(
+    const QSet<QString>& geometryTypeCrits, const QStringList& ops, QSet<QString>& removedOps);
+
+  /*
+   * Returns a list of GeometryTypeCriterion class names that match up with those supported by the
+   * current matcher config
+   */
+  static QSet<QString> _getMatchCreatorGeometryTypeCrits();
+
+  static bool _isGeometryTypeCrit(const QString& className);
+};
+
+}
+
+#endif // SUPERFLUOUS_CONFLATE_OP_REMOVER_H
+