v0.2.54..v0.2.55 changeset ElementIdUtils.h

diff --git a/hoot-core/src/main/cpp/hoot/core/elements/ElementIdUtils.h b/hoot-core/src/main/cpp/hoot/core/elements/ElementIdUtils.h
new file mode 100644
index 0000000..cda3436
--- /dev/null
+++ b/hoot-core/src/main/cpp/hoot/core/elements/ElementIdUtils.h
@@ -0,0 +1,81 @@
+/*
+ * 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 ELEMENT_ID_UTILS_H
+#define ELEMENT_ID_UTILS_H
+
+// Hoot
+#include <hoot/core/elements/OsmMap.h>
+
+namespace hoot
+{
+
+/**
+ * Various utilities for working with element IDs
+ */
+class ElementIdUtils
+{
+
+public:
+
+  /**
+   * Retrieves a collection of element IDs for a collection of elements
+   *
+   * @param elements a collection of elements
+   * @return a collection of element IDs
+   * @todo may be able to replace nodesToNodeIds with this more generic version
+   */
+  static QSet<ElementId> elementsToElementIds(const std::vector<ElementPtr>& elements);
+
+  /**
+   * Determines if all element IDs in a map are positive
+   *
+   * @param map the map to examine
+   * @return true if all elements in the input map have a positive ID; false otherwise
+   */
+  static bool allElementIdsPositive(const ConstOsmMapPtr& map);
+
+  /**
+   * Determines if all element IDs in a map are negative
+   *
+   * @param map the map to examine
+   * @return true if all elements in the input map have a negative ID; false otherwise
+   */
+  static bool allElementIdsNegative(const ConstOsmMapPtr& map);
+
+  /**
+   * Determines if all hoot:id element tags in a map match their element IDs
+   *
+   * @param map the map to examine
+   * @return true if all the hoot:id tag values match the owning element's ID; false otherwise
+   */
+  static bool allIdTagsMatchIds(const ConstOsmMapPtr& map);
+};
+
+}
+
+#endif // ELEMENT_ID_UTILS_H