v0.2.50..v0.2.51 changeset OsmChangesetFileWriterFactory.h

diff --git a/hoot-core/src/main/cpp/hoot/core/io/OsmChangesetFileWriterFactory.h b/hoot-core/src/main/cpp/hoot/core/io/OsmChangesetFileWriterFactory.h
new file mode 100644
index 0000000..88216be
--- /dev/null
+++ b/hoot-core/src/main/cpp/hoot/core/io/OsmChangesetFileWriterFactory.h
@@ -0,0 +1,73 @@
+/*
+ * 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) 2019 DigitalGlobe (http://www.digitalglobe.com/)
+ */
+#ifndef OSM_CHANGESET_FILE_WRITER_FACTORY_H
+#define OSM_CHANGESET_FILE_WRITER_FACTORY_H
+
+// Qt
+#include <QString>
+
+namespace hoot
+{
+class OsmChangesetFileWriter;
+
+/**
+ * A factory for constructing changeset file writers based on the URL (Singleton).
+ */
+class OsmChangesetFileWriterFactory
+{
+public:
+
+  static std::string className() { return "hoot::OsmChangesetFileWriterFactory"; }
+
+  /**
+   * Creates a writer capable of writing OSM changesets to a file
+   *
+   * @param url the path the writer writes to
+   * @param osmApiDbUrl URL to an OSM API database used to calculate element IDs; required only if
+   * the output changeset is of type .osc.sql
+   * @return an OsmChangesetFileWriter
+   */
+  std::shared_ptr<OsmChangesetFileWriter> createWriter(const QString& url,
+                                                       const QString& osmApiDbUrl = "");
+
+  /**
+   * Returns a Singleton instance of the factory
+   *
+   * @return an OsmChangesetFileWriterFactory Singleton instance
+   */
+  static OsmChangesetFileWriterFactory& getInstance();
+
+private:
+
+  OsmChangesetFileWriterFactory();
+
+  static std::shared_ptr<OsmChangesetFileWriterFactory> _theInstance;
+};
+
+}
+
+#endif // OSM_CHANGESET_FILE_WRITER_FACTORY_H