1 files changed, 85 insertions, 0 deletions
diff --git a/src/core/model/RootNode.hpp b/src/core/model/RootNode.hpp
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+/*
+    Ousía
+    Copyright (C) 2014, 2015  Benjamin Paaßen, Andreas Stöckel
+
+    This program 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/>.
+*/
+
+/**
+ * @file RootNode.hpp
+ *
+ * Defines a base class for Nodes that may act as a root and thus are capable of
+ * importing other nodes.
+ *
+ * @author Andreas Stöckel (astoecke@techfk.uni-bielefeld.de)
+ */
+
+#ifndef _OUSIA_ROOT_NODE_HPP_
+#define _OUSIA_ROOT_NODE_HPP_
+
+#include "Node.hpp"
+
+namespace ousia {
+
+/**
+ * The RootNode class represents a Node that may be a Root node (such as
+ * Documents, Typesystems and Domains). Root nodes have the property, that the
+ * allow importing/referencing other Nodes.
+ */
+class RootNode : public Node {
+protected:
+	/**
+	 * Imports the given node. The node was checked to be one of the supported
+	 * types.
+	 *
+	 * @param node is the node that should be imported.
+	 */
+	virtual void doImport(Handle<Node> node) = 0;
+
+	/**
+	 * Should return a set of types that can be imported by this Node.
+	 *
+	 * @return a set of Node types that may be imported by this Node.
+	 */
+	virtual RttiSet doGetImportTypes() = 0;
+
+public:
+	using Node::Node;
+
+	/**
+	 * Tries to import the given node. Throws an exception if the node is not of
+	 * the supported types.
+	 *
+	 * @param node is the node that should be imported.
+	 */
+	void import(Handle<Node> node);
+
+	/**
+	 * Returns a set of types that can be imported by this Node.
+	 *
+	 * @return a set of types that can be imported.
+	 */
+	RttiSet getImportTypes();
+};
+
+namespace RttiTypes {
+/**
+ * Rtti descriptor for the RootNode class.
+ */
+extern const Rtti RootNode;
+}
+}
+
+#endif /* _OUSIA_ROOT_NODE_HPP_ */
+