131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
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/*
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\newpage
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//[_] [\_]
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//characters [1] verbatim: [$] [$]
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//characters [2] formula: [$] [$]
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//characters [3] capital: [\textsc{] [}]
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//characters [4] teletype: [\texttt{] [}]
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1.1 Headerfile "GTree[_]NodeManager.h"[4]
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January-May 2008, Mirko Dibbert
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*/
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#ifndef __GTREE_NODE_MANAGER_H__
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#define __GTREE_NODE_MANAGER_H__
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#include <map>
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#include "GTree_NodeBase.h"
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namespace gtree
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{
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/********************************************************************
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Class ~NodeManager~
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This class manages the node prototypes and could create new nodes of a specific type by calling the clone method of the respective prototype node.
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********************************************************************/
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class NodeManager
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{
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public:
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typedef std::map<NodeTypeId, NodeBase*>::iterator iterator;
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/*
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Constructor.
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*/
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NodeManager(SmiRecordFile *treeFile)
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: m_file(treeFile)
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{}
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/*
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Destructor.
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*/
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~NodeManager()
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{
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for (iterator iter = m_prototypes.begin();
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iter != m_prototypes.end(); ++iter)
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{
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delete iter->second;
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}
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}
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/*
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Adds a new prototype node.
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*/
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inline void addPrototype(NodeBase* node)
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{ m_prototypes[node->typeId()] = node; }
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/*
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Returns a copy of the prototype node with id "type"[4]. If such a node does not exist, it prints an error message and halts the dbms or returns 0 (if assertions are disabled).
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*/
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NodeBase *createNode(NodeTypeId type)
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{
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iterator iter = m_prototypes.find(type);
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if (iter != m_prototypes.end())
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{
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return iter->second->clone();
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}
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else // node type not found in prototype map
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{
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Msg::undefinedNodeType_Error(type);
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return 0;
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}
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}
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/*
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Adds all prototype nodes from the "src"[4] objects to this object (used in the "Tree"[4] copy constructor).
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*/
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void copyPrototypes(NodeManager *src)
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{
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for (size_t i = 0; i < src->m_prototypes.size(); ++i)
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addPrototype(src->m_prototypes[i]->clone());
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}
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/*
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Returns a reference to the tree file.
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*/
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inline SmiRecordFile *file() const
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{ return m_file; }
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private:
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SmiRecordFile *m_file;
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// reference to the tree file
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std::map<NodeTypeId, NodeBase*> m_prototypes;
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// prototypes for all registered nodes
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}; // class NodeManager
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} // namespace gtree
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#endif // #define __GTREE_NODE_MANAGER_H__
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