Migration from SVN

eo/src/eoMergeReduce.h

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+/** -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+   -----------------------------------------------------------------------------
+   eoMergeReduce.h
+   (c) Maarten Keijzer, GeNeura Team, 2000
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+   Contact: todos@geneura.ugr.es, http://geneura.ugr.es
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef _eoMergeReduce_h
+#define _eoMergeReduce_h
+
+
+//-----------------------------------------------------------------------------
+#include <eoPop.h>
+#include <eoFunctor.h>
+#include <eoMerge.h>
+#include <eoReduce.h>
+#include <eoReplacement.h>
+#include <utils/eoHowMany.h>
+//-----------------------------------------------------------------------------
+/**
+Replacement strategies that combine en eoMerge and an eoReduce.
+
+@class eoMergeReduce, the base (pure abstract) class
+@class eoPlusReplacement the ES plus strategy
+@class eoCommaReplacement the ES comma strategy
+*/
+
+/**
+eoMergeReduce: abstract replacement strategy that is just an application of
+an embedded merge, followed by an embedded reduce
+@ingroup Replacors
+*/
+template <class EOT>
+class eoMergeReduce : public eoReplacement<EOT>
+{
+    public:
+        eoMergeReduce(eoMerge<EOT>& _merge, eoReduce<EOT>& _reduce) :
+        merge(_merge), reduce(_reduce)
+        {}
+
+        void operator()(eoPop<EOT>& _parents, eoPop<EOT>& _offspring)
+        {
+            merge(_parents, _offspring); // parents untouched, result in offspring
+            reduce(_offspring, _parents.size());
+            _parents.swap(_offspring);
+        }
+
+    private :
+        eoMerge<EOT>& merge;
+        eoReduce<EOT>& reduce;
+};
+
+/**
+ES type of replacement strategy: first add parents to population, then truncate
+@ingroup Replacors
+*/
+template <class EOT>
+class eoPlusReplacement : public eoMergeReduce<EOT>
+{
+    public :
+        eoPlusReplacement() : eoMergeReduce<EOT>(plus, truncate) {}
+
+    private :
+        eoPlus<EOT> plus;
+        eoTruncate<EOT> truncate;
+};
+
+/**
+ES type of replacement strategy: ignore parents, truncate offspring
+@ingroup Replacors
+*/
+template <class EOT>
+class eoCommaReplacement : public eoMergeReduce<EOT>
+{
+    public :
+        eoCommaReplacement() : eoMergeReduce<EOT>(no_elite, truncate) {}
+
+    private :
+        eoNoElitism<EOT> no_elite;
+        eoTruncate<EOT> truncate;
+};
+
+/**
+EP type of replacement strategy: first add parents to population,
+   then truncate using EP tournament
+@ingroup Replacors
+*/
+template <class EOT>
+class eoEPReplacement : public eoMergeReduce<EOT>
+{
+public :
+  eoEPReplacement(int _tSize) : eoMergeReduce<EOT>(plus, truncate), truncate(_tSize)
+    //  {truncate.setSize(_tSize);}
+  {}
+private :
+  eoPlus<EOT> plus;
+  eoEPReduce<EOT> truncate;
+};
+
+
+
+#endif