net.mograsim.logic.core/src/net/mograsim/logic/core/components/ManualSwitch.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.types.Bit;
  11 import net.mograsim.logic.core.types.BitVector;
  12 import net.mograsim.logic.core.wires.Wire.ReadEnd;
  13 import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
  14
  15 /**
  16  * This class models a simple on/off (ONE/ZERO) switch for user interaction.
  17  *
  18  * @author Christian Femers
  19  *
  20  */
  21 public class ManualSwitch extends Component implements LogicObservable
  22 {
  23         private Collection<LogicObserver> observers;
  24         private ReadWriteEnd output;
  25
  26         public ManualSwitch(Timeline timeline, ReadWriteEnd output)
  27         {
  28                 super(timeline);
  29                 observers = new ArrayList<>();
  30                 this.output = output;
  31         }
  32
  33         public void switchFullOn()
  34         {
  35                 setState(BitVector.of(Bit.ONE, output.width()));
  36         }
  37
  38         public void switchFullOff()
  39         {
  40                 setState(BitVector.of(Bit.ZERO, output.width()));
  41         }
  42
  43         public void toggle()
  44         {
  45                 if (isFullOn())
  46                         switchFullOff();
  47                 else
  48                         switchFullOn();
  49         }
  50
  51         public void setState(Bit bit)
  52         {
  53                 setState(BitVector.of(bit));
  54         }
  55
  56         public void setState(BitVector bits)
  57         {
  58                 if (bits.length() != output.width())
  59                         throw new IllegalArgumentException("Incorrect bit vector length");
  60                 if (bits.equals(output.getInputValues()))
  61                         return;
  62                 output.feedSignals(bits);
  63                 notifyObservers();
  64         }
  65
  66         public boolean isFullOn()
  67         {
  68                 return BitVector.of(Bit.ONE, output.width()).equals(output.getInputValues());
  69         }
  70
  71         public BitVector getValues()
  72         {
  73                 return output.getInputValues();
  74         }
  75
  76         @Override
  77         public List<ReadEnd> getAllInputs()
  78         {
  79                 return List.of();
  80         }
  81
  82         @Override
  83         public List<ReadWriteEnd> getAllOutputs()
  84         {
  85                 return List.of(output);
  86         }
  87
  88         @Override
  89         public void registerObserver(LogicObserver ob)
  90         {
  91                 observers.add(ob);
  92         }
  93
  94         @Override
  95         public void deregisterObserver(LogicObserver ob)
  96         {
  97                 observers.remove(ob);
  98         }
  99
 100         @Override
 101         public void notifyObservers()
 102         {
 103                 observers.forEach(ob -> ob.update(this));
 104         }
 105
 106 }