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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 <core/managed/Managed.hpp>
#include <core/common/Rtti.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 referenced.
*/
virtual void doReference(Handle<Node> node) = 0;
/**
* Should return a set of types that can be referenced by this Node.
*
* @return a set of Node types that may be referenced by this Node.
*/
virtual RttiSet doGetReferenceTypes() const = 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 reference(Handle<Node> node);
/**
* Returns a set of types that can be referenced by this Node.
*
* @return a set of types that can be referenced.
*/
RttiSet getReferenceTypes() const;
};
namespace RttiTypes {
/**
* Rtti descriptor for the RootNode class.
*/
extern const Rtti RootNode;
}
}
#endif /* _OUSIA_ROOT_NODE_HPP_ */
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