Beiträge von Früchtemüsli

<?php
   error_reporting(~0);

   class Schaltflaeche
   {
      private $command;


      /**
       * @param closure $command
       */
      function __construct($command)
      {
         //$this->command = Closure::bind($command, $this, get_class());
         $this->command = $command;
      }
      function click()
      {
         call_user_func($this->command);
      }
   }

   class VideoPlayer
   {
      function einschalten()
      {
         echo 'ein';
      }
      function ausschalten()
      {
         echo 'aus';
      }
   }


   $fEinschaltenCommand = 
      /**
       * @param VideoPlayer $oVideoPlayer
       * @return closure
       */
      function(VideoPlayer $oVideoPlayer)
      {
         return function() use ($oVideoPlayer)
         {
            $oVideoPlayer->einschalten();
         };
      };

   $fAusschaltenCommand = 
      /**
       * @param VideoPlayer $oVideoPlayer
       * @return closure
       */
      function(VideoPlayer $oVideoPlayer)
      {
         return function() use ($oVideoPlayer)
         {
            $oVideoPlayer->ausschalten();
         };
      };

   $oVideoPlayer = new VideoPlayer();
   $oSchaltflaecheEin = new Schaltflaeche($fEinschaltenCommand($oVideoPlayer));
   $oSchaltflaecheEin->click();
   $oSchaltflaecheAus = new Schaltflaeche($fAusschaltenCommand($oVideoPlayer));
   $oSchaltflaecheAus->click();
?>

<?php
   error_reporting(~0);

   /**
    * Ganz allgemeine Vertex-Klasse.
    */
   class GraphVertex
   {
      private $name;

      function __construct($name)
      {
         $this->name = $name;
      }
      function getName()
      {
         return $this->name;
      }
   }

   /**
    * Wird dann einer CityGraphVertex zugewiesen.
    */    
   class City
   {
      private $sName;
      private $nArea;
      private $iPolulation;

      function __construct($name, $area, $population)
      { 
         // ...
      }
   }

   /**
    * Eine eigene Vertex-Klasse für Städte.
    */
   class CityGraphVertex extends GraphVertex
   {
      private $oCity;

      function __construct($name, City $oCity)
      {
         parent::__construct($name);
         $this->oCity = $oCity;
      }
      function getCity()
      {
         return $this->oCity;
      }
   }

   abstract class AEdge
   {
      protected $oU;
      protected $oV;

      function __construct(GraphVertex $oU, GraphVertex $oV)
      {
         $this->oU = $oU;
         $this->oV = $oV;
      }
   }

   /**
    * Gewichtete Kante.
    */
   class UniWeightEdge extends AEdge
   {
      private $nWeight;
      private $bDir;

      function __construct(GraphVertex $oU, GraphVertex $oV, $weight, $dir)
      {
         parent::__construct($oU, $oV);
         // ...
      }
   }


   /**
    * Bidirektional gewichtete Kante.
    */
   class BiWeightEdge extends AEdge
   {
      private $nWeightUV;
      private $nWeightVU;
      private $bDir;

      function __construct(GraphVertex $oU, GraphVertex $oV, $weightUV, $weightVU, $dir)
      {
         parent::__construct($oU, $oV);
         // ...
      }
   }

   /**
    * Ausgangsbasis für alle Arten von Graphen.
    */
   abstract class AGraph
   {
      protected $aVertex = [];
      protected $aEdge = [];

      function addVertex(GraphVertex $oVertex)
      {
         $this->aVertex[] = $oVertex;
      }
   }

   /**
    * Graph mit gewichteten Kanten.
    */
   class UniWeightGraph extends AGraph
   {
      function addEdge(GraphVertex $oU, GraphVertex $oV, $weight, $dir = false)
      {
         // ...
         $this->aEdge[] = new UniWeightEdge($oU, $oV, $weight, $dir);
      }
   }

   /**
    * Graph mit bidirektional gewichteten Kanten.
    */
   class BiWeightGraph extends AGraph
   {      
      function addEdge(GraphVertex $oU, GraphVertex $oV, $weightUV, $weightVU, $dir = false)
      {
         // ...
         $this->aEdge[] = new BiWeightEdge($oU, $oV, $weightUV, $weightVU, $dir);
      }
   }

   $oG = new BiWeightGraph();

   $oCGVParis = new CityGraphVertex('paris', new City('Paris', 17174.4, 12161542));
   $oCGVVienna = new CityGraphVertex('vienna', new City('Vienna', 414.87, 1763912));

   $oC->addVertex($oCGVParis);
   $oC->addVertex($oCGVVienna);

   $oC->addEdge($oCGVParis, $oCGVVienna, 1033, 1033.5);
?>

<?php
   error_reporting(~0);

   class BranchAndBoundNode
   {
      private $iKey;
      private $value;

      function __construct($key, $value)
      {
         $this->setKey($key);
         $this->value = $value;
      }
      private function setKey($key)
      {
         if
         (
            !is_int($key) ||
            $key < 0
         )
            throw new Exception('key');

         $this->iKey = $key;
      }
   }

   class BranchAndBound
   {
      private $aNode = []; // Alle Knoten.
      private $aDistanceMatrix = []; // Für die Werte einer Distanz-Matrix.

      /**
       * Einen node hinzufügen.
       * @param mixed $key
       * @param mixed $value
       */
      function insert($key, $value)
      {
         if(array_key_exists($key, $this->aNode))
            throw new Exception('key');

         $this->aNode[$key] = new BranchAndBoundNode($key, $value);
      }
      /**
       * Definiert eine asymmetrische Distanz zwischen 2 Knoten.
       * @param int $key0 key von node 0
       * @param int $key1 key von node 1
       * @param number $distance01 Distanz von node 0 auf node 1
       * @param number $distance10 Distanz von node 1 auf node 0
       */
      function edgeDistances($key0, $key1, $distance01, $distance10)
      {
         if(!array_key_exists($key0, $this->aNode))
            throw new Exception('key0');

         if(!array_key_exists($key1, $this->aNode))
            throw new Exception('key1');

         if($key0 == $key1)
            throw new Exception('keys');

         self::checkDistance($distance01);
         self::checkDistance($distance10);

         $this->aDistanceMatrix[$key1]/* nach .. x */[$key0]/* von .. y */ = $distance01; /* von 0 nach 1 */
         $this->aDistanceMatrix[$key0][$key1] = $distance10;
      }
      /**
       * Distanz prüfen.
       * @param number $distance
       * @throws Exception
       *    not typ number
       */
      static private function checkDistance($distance)
      {
         if(!is_numeric($distance))
            throw new Exception('distance');
      }
      /**
       * Distanz-Matrix prüfen.
       * @throws Exception
       */
      private function checkDistanceMatrix()
      {
         $iCount = count($this->aNode);
         for($iTo = 0; $iTo < $iCount; ++$iTo)
         {
            for($iFrom = 0; $iFrom < $iCount; ++$iFrom)
            {
               if($iFrom == $iTo)
               {
                  $this->aDistanceMatrix[$iTo][$iFrom] = INF; // unendlich
               }
               elseif // Kontrolle, ob das Array-Element existiert:
               (
                  !array_key_exists($iTo, $this->aDistanceMatrix) ||
                  !array_key_exists($iFrom, $this->aDistanceMatrix[$iTo])
               )
                  throw new Exception('matrix value');
            }
            if(count($this->aDistanceMatrix[$iTo]) != $iCount)
               throw new Exception('matrix count from');
         }
         if(count($this->aDistanceMatrix) != $iCount)
            throw new Exception('matrix count to');
      }

      // nur zum Testen:
      function getMatrix()
      {
         return $this->aDistanceMatrix;
      }
      function check()
      {
         $this->checkDistanceMatrix();
      }
   }

   $oBAB = new BranchAndBound();

   // nodes:
   $oBAB->insert(0, 0);
   $oBAB->insert(1, 1);
   $oBAB->insert(2, 2);
   $oBAB->insert(3, 3);
   $oBAB->insert(4, 4);
   $oBAB->insert(5, 5);

   // Distanzen:
   $oBAB->edgeDistances(1, 0, 6, 5);
   $oBAB->edgeDistances(2, 0, 1, 1);
   $oBAB->edgeDistances(3, 0, 4, 2);
   $oBAB->edgeDistances(4, 0, 1, 1);
   $oBAB->edgeDistances(5, 0, 6, 6);
   $oBAB->edgeDistances(2, 1, 4, 6);
   $oBAB->edgeDistances(3, 1, 3, 3);
   $oBAB->edgeDistances(4, 1, 5, 7);
   $oBAB->edgeDistances(5, 1, 2, 2);
   $oBAB->edgeDistances(3, 2, 3, 1);
   $oBAB->edgeDistances(4, 2, 1, 2);
   $oBAB->edgeDistances(5, 2, 6, 5);
   $oBAB->edgeDistances(4, 3, 2, 5);
   $oBAB->edgeDistances(5, 3, 4, 4);
   $oBAB->edgeDistances(5, 4, 5, 5);

   // nur zum Testen:
   var_dump($oBAB->getMatrix());
   $oBAB->check();
?>