PopulationView extends Population

A population view provides a way of referring to a collection of existing entities. It is specified by providing a population and a method to decide whether to add each entity to the view. A typical view would be a grid based decomposition which provides a method to look up all entities in a given grid square.

• PopulationView( String name, Population srcPop )
  void buildView( Entity e )
  
  void      addEntityToView( Entity e )
  

• Derived population views should override the buildView() method which is called for each entity of the source population and considers whether to add the given entity to the view (by calling addEntityToView()).