net.mograsim.logic.core/src/net/mograsim/logic/core/components/CoreBitDisplay.java

   1 package net.mograsim.logic.core.components;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collection;
   5 import java.util.List;
   6
   7 import net.mograsim.logic.core.LogicObservable;
   8 import net.mograsim.logic.core.LogicObserver;
   9 import net.mograsim.logic.core.timeline.Timeline;
  10 import net.mograsim.logic.core.timeline.TimelineEventHandler;
  11 import net.mograsim.logic.core.types.Bit;
  12 import net.mograsim.logic.core.types.BitVector;
  13 import net.mograsim.logic.core.wires.CoreWire.ReadEnd;
  14 import net.mograsim.logic.core.wires.CoreWire.ReadWriteEnd;
  15
  16 public class CoreBitDisplay extends BasicCoreComponent implements LogicObservable
  17 {
  18         private Collection<LogicObserver> observers;
  19         private final ReadEnd in;
  20         private BitVector displayedValue;
  21
  22         public CoreBitDisplay(Timeline timeline, ReadEnd in)
  23         {
  24                 super(timeline, 1);
  25                 observers = new ArrayList<>();
  26                 this.in = in;
  27                 in.registerObserver(this);
  28                 compute();
  29         }
  30
  31         @Override
  32         protected TimelineEventHandler compute()
  33         {
  34                 BitVector newValues = in.getValues();
  35                 return e ->
  36                 {
  37                         displayedValue = newValues;
  38                         notifyObservers();
  39                 };
  40         }
  41
  42         public BitVector getDisplayedValue()
  43         {
  44                 return displayedValue;
  45         }
  46
  47         public boolean isDisplaying(Bit... values)
  48         {
  49                 return displayedValue.equals(BitVector.of(values));
  50         }
  51
  52         @Override
  53         public List<ReadEnd> getAllInputs()
  54         {
  55                 return List.of(in);
  56         }
  57
  58         @Override
  59         public List<ReadWriteEnd> getAllOutputs()
  60         {
  61                 return List.of();
  62         }
  63
  64         @Override
  65         public void registerObserver(LogicObserver ob)
  66         {
  67                 observers.add(ob);
  68         }
  69
  70         @Override
  71         public void deregisterObserver(LogicObserver ob)
  72         {
  73                 observers.remove(ob);
  74         }
  75
  76         @Override
  77         public void notifyObservers()
  78         {
  79                 observers.forEach(ob -> ob.update(this));
  80         }
  81 }