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

   1 package net.mograsim.logic.core.components;\r
   2 \r
   3 import java.util.ArrayList;\r
   4 import java.util.Collection;\r
   5 import java.util.List;\r
   6 \r
   7 import net.mograsim.logic.core.LogicObservable;\r
   8 import net.mograsim.logic.core.LogicObserver;\r
   9 import net.mograsim.logic.core.timeline.Timeline;\r
  10 import net.mograsim.logic.core.types.Bit;\r
  11 import net.mograsim.logic.core.wires.Wire.ReadEnd;\r
  12 import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;\r
  13 \r
  14 /**\r
  15  * This class models a simple on/off (ONE/ZERO) switch for user interaction.\r
  16  *\r
  17  * @author Christian Femers\r
  18  *\r
  19  */\r
  20 public class ManualSwitch extends Component implements LogicObservable\r
  21 {\r
  22         private Collection<LogicObserver> observers;\r
  23         private ReadWriteEnd output;\r
  24         private boolean isOn;\r
  25 \r
  26         public ManualSwitch(Timeline timeline, ReadWriteEnd output)\r
  27         {\r
  28                 super(timeline);\r
  29                 observers = new ArrayList<>();\r
  30                 if (output.length() != 1)\r
  31                         throw new IllegalArgumentException("Switch output can be only a single wire");\r
  32                 this.output = output;\r
  33         }\r
  34 \r
  35         public void switchOn()\r
  36         {\r
  37                 setState(true);\r
  38         }\r
  39 \r
  40         public void switchOff()\r
  41         {\r
  42                 setState(false);\r
  43         }\r
  44 \r
  45         public void toggle()\r
  46         {\r
  47                 setState(!isOn);\r
  48         }\r
  49 \r
  50         public void setState(boolean isOn)\r
  51         {\r
  52                 if (this.isOn == isOn)\r
  53                         return;\r
  54                 this.isOn = isOn;\r
  55                 output.feedSignals(getValue());\r
  56                 notifyObservers();\r
  57         }\r
  58 \r
  59         public void setToValueOf(Bit bit)\r
  60         {\r
  61                 if (bit == Bit.ONE)\r
  62                         switchOn();\r
  63                 else if (bit == Bit.ZERO)\r
  64                         switchOff();\r
  65                 else\r
  66                         throw new IllegalArgumentException("Cannot set ManualSwitch to the value of Bit " + bit);\r
  67         }\r
  68 \r
  69         public boolean isOn()\r
  70         {\r
  71                 return isOn;\r
  72         }\r
  73 \r
  74         public Bit getValue()\r
  75         {\r
  76                 return isOn ? Bit.ONE : Bit.ZERO;\r
  77         }\r
  78 \r
  79         @Override\r
  80         public List<ReadEnd> getAllInputs()\r
  81         {\r
  82                 return List.of();\r
  83         }\r
  84 \r
  85         @Override\r
  86         public List<ReadWriteEnd> getAllOutputs()\r
  87         {\r
  88                 return List.of(output);\r
  89         }\r
  90 \r
  91         @Override\r
  92         public void registerObserver(LogicObserver ob)\r
  93         {\r
  94                 observers.add(ob);\r
  95         }\r
  96 \r
  97         @Override\r
  98         public void deregisterObserver(LogicObserver ob)\r
  99         {\r
 100                 observers.remove(ob);\r
 101         }\r
 102 \r
 103         @Override\r
 104         public void notifyObservers()\r
 105         {\r
 106                 observers.forEach(ob -> ob.update(this));\r
 107         }\r
 108 \r
 109 }\r