eo/src/eoTranspose.h

@@ -0,0 +1,74 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoTranspose.h
+// (c) GeNeura Team, 1998
+//-----------------------------------------------------------------------------
+
+#ifndef _EOTRANSPOSE_h
+#define _EOTRANSPOSE_h
+
+#include <eoUniform.h>
+
+#include <eoOp.h>
+
+/** Transposition operator: interchanges the position of two genes
+of an EO. These positions must be defined by an only index, that is,
+EOT must subclass eo1d
+*/
+template <class EOT >
+class eoTranspose: public eoMonOp<EOT>  {
+public:
+  ///
+  eoTranspose()
+    : eoMonOp< EOT >( ){};
+  
+  /// needed virtual dtor
+  virtual ~eoTranspose() {};
+  
+  ///
+  virtual void operator()( EOT& _eo ) const {
+    eoUniform<unsigned> uniform(0, _eo.length() );
+    unsigned pos1 = uniform(),
+      pos2 = uniform();
+    applyAt( _eo, pos1, pos2 );
+  }
+  
+  /** @name Methods from eoObject
+      readFrom and printOn are directly inherited from eoOp
+  */
+  //@{
+  /** Inherited from eoObject 
+      @see eoObject
+  */
+  virtual string className() const {return "eoTranspose";};
+  //@}
+  
+private: 
+  
+#ifdef _MSC_VER
+  typedef EOT::Type Type;
+#else
+  typedef typename EOT::Type Type;
+#endif
+  
+  /** applies operator to one gene in the EO
+      @param _eo victim of transposition
+      @param i, j positions of the genes that are going to be changed
+      @throw runtime_exception if the positions to write are incorrect
+  */
+  virtual void applyAt( EOT& _eo, unsigned _i, unsigned _j) const {
+    try {
+      Type tmp = _eo.gene( _i );
+      _eo.gene( _i ) =  _eo.gene( _j );
+      _eo.gene( _j ) = tmp;
+    } catch ( exception& _e ) {
+      string msg = _e.what();
+      msg += "Caught exception at eoTranspose";
+      throw  runtime_error( msg.c_str() );
+    }
+  }
+  
+};
+
+#endif