v0.2.54..v0.2.55 changeset RelationMemberComparison.h

diff --git a/hoot-core/src/main/cpp/hoot/core/elements/RelationMemberComparison.h b/hoot-core/src/main/cpp/hoot/core/elements/RelationMemberComparison.h
new file mode 100644
index 0000000..ffc7bde
--- /dev/null
+++ b/hoot-core/src/main/cpp/hoot/core/elements/RelationMemberComparison.h
@@ -0,0 +1,79 @@
+/*
+ * 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 RELATION_MEMBER_COMPARISON_H
+#define RELATION_MEMBER_COMPARISON_H
+
+// Hoot
+#include <hoot/core/elements/ElementComparison.h>
+
+namespace hoot
+{
+
+/**
+ * Allows for comparing relation members within a collection
+ *
+ * The original reason for needing this class in addition to its parent was for the relation role
+ * comparison. Now that role is part of the relation hash created by ElementHashVisitor, it seems
+ * like we wouldn't need this class. However, note the call to getRole() in
+ * CollectionRelationMerger...so at this time, this class is needed.
+ *
+ * @see ElementComparison
+ */
+class RelationMemberComparison : public ElementComparison
+{
+public:
+
+  RelationMemberComparison();
+  RelationMemberComparison(ElementPtr element, const OsmMap& sourceMap, const QString& role,
+                           const bool ignoreElementId = false);
+
+  virtual bool operator==(const RelationMemberComparison& memberComp) const;
+
+  virtual QString toString() const;
+
+  QString getRole() const { return _role; }
+
+private:
+
+  QString _role;
+};
+
+inline uint qHash(const RelationMemberComparison& memberComp)
+{
+  const QString hashFromTag =
+    memberComp.getElement()->getTags().get(MetadataTags::HootHash()).trimmed();
+  if (!hashFromTag.isEmpty())
+  {
+    return qHash(hashFromTag);
+  }
+  return qHash(memberComp.toHashString());
+}
+
+
+}
+
+#endif // RELATION_MEMBER_COMPARISON_H