148 lines
4.0 KiB
C
148 lines
4.0 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 Headerfile "MTreeConfig.h"[4]
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January-May 2008, Mirko Dibbert
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1.1 Overview
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This headerfile contains the "MTreeConfigReg"[4] class, which provides a set of configurations. Each configuration is identified with a unique name and sets the used split policy as well as the min/max count of entries and max count of pages per node.
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All avaliable config objects are defined in the initialize function (file "MTreeConfig.cpp"[4]) and could be selected with the createmtree2 or createmtree3 operator (createmtree uses the default values).
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1.1 Includes and defines
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*/
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#ifndef __MTREE_CONFIG_H__
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#define __MTREE_CONFIG_H__
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#include "MTreeAlgebra.h"
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#include "Algebras/GeneralTree/GeneralTreeAlgebra.h"
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namespace mtreeAlgebra
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{
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// name of the default config
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const std::string CONFIG_DEFAULT("default");
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/********************************************************************
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1.1 Struct ~MTreeConfig~
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********************************************************************/
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struct MTreeConfig
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{
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/*
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Config objects for all node types.
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*/
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gtree::NodeConfig leafNodeConfig;
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gtree::NodeConfig internalNodeConfig;
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/*
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This parameters contain the promote and partition functions, which should be used.
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*/
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PROMOTE promoteFun;
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PARTITION partitionFun;
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/*
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Constructor (creates object with default values).
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*/
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MTreeConfig()
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: leafNodeConfig(
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LEAF, leafPrio, minLeafEntries,
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maxLeafEntries, maxLeafPages, leafCacheable),
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internalNodeConfig(
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INTERNAL, internalPrio, minIntEntries,
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maxIntEntries, maxIntPages, internalCacheable),
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promoteFun(defaultPromoteFun),
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partitionFun(defaultPartitionFun)
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{}
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/*
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Constructor (creates objects with the given parameters).
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*/
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MTreeConfig(
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gtree::NodeConfig _leafNodeConfig,
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gtree::NodeConfig _internalNodeConfig,
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PROMOTE _promoteFun,
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PARTITION _partitionFun)
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: leafNodeConfig(_leafNodeConfig),
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internalNodeConfig(_internalNodeConfig),
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promoteFun(_promoteFun),
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partitionFun(_partitionFun)
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{}
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}; // struct MTreeConfig
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/********************************************************************
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1.1 Class "MTreeConfigReg"[4]
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********************************************************************/
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class MTreeConfigReg
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{
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public:
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/*
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This method returns the specified "MTreeConfig"[4] object. If no such object could be found, the method returns a new object with default values.
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*/
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static MTreeConfig getConfig(const std::string &name);
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/*
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Returns true, if the specified "MTreeConfig"[4] object is defiend.
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*/
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static bool isDefined(const std::string &name);
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/*
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Returns a string with the names of all defined config objects.
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*/
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static std::string definedNames();
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/*
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Registeres all config objects.
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*/
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static void initialize();
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private:
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static std::map<std::string, MTreeConfig> configs;
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static bool initialized;
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}; // class MTreeConfigReg
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} // namespace mtreeAlgebra
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#endif // #ifdef __MTREE_CONFIG_H__
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