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 \r
  25         public ManualSwitch(Timeline timeline, ReadWriteEnd output)\r
  26         {\r
  27                 super(timeline);\r
  28                 observers = new ArrayList<>();\r
  29                 if (output.length() != 1)\r
  30                         throw new IllegalArgumentException("Switch output can be only a single wire");\r
  31                 this.output = output;\r
  32         }\r
  33 \r
  34         public void switchOn()\r
  35         {\r
  36                 setState(true);\r
  37         }\r
  38 \r
  39         public void switchOff()\r
  40         {\r
  41                 setState(false);\r
  42         }\r
  43 \r
  44         public void toggle()\r
  45         {\r
  46                 setState(!isOn());\r
  47         }\r
  48 \r
  49         public void setState(boolean isOn)\r
  50         {\r
  51                 setToValueOf(isOn ? Bit.ONE : Bit.ZERO);\r
  52         }\r
  53 \r
  54         public void setToValueOf(Bit bit)\r
  55         {\r
  56                 if (!bit.isBinary())\r
  57                         throw new IllegalArgumentException("Cannot set ManualSwitch to the value of Bit " + bit);\r
  58                 if (bit == output.getInputValue())\r
  59                         return;\r
  60                 output.feedSignals(bit);\r
  61                 notifyObservers();\r
  62         }\r
  63 \r
  64         public boolean isOn()\r
  65         {\r
  66                 return output.getInputValue() == Bit.ONE;\r
  67         }\r
  68 \r
  69         public Bit getValue()\r
  70         {\r
  71                 return output.getInputValue();\r
  72         }\r
  73 \r
  74         @Override\r
  75         public List<ReadEnd> getAllInputs()\r
  76         {\r
  77                 return List.of();\r
  78         }\r
  79 \r
  80         @Override\r
  81         public List<ReadWriteEnd> getAllOutputs()\r
  82         {\r
  83                 return List.of(output);\r
  84         }\r
  85 \r
  86         @Override\r
  87         public void registerObserver(LogicObserver ob)\r
  88         {\r
  89                 observers.add(ob);\r
  90         }\r
  91 \r
  92         @Override\r
  93         public void deregisterObserver(LogicObserver ob)\r
  94         {\r
  95                 observers.remove(ob);\r
  96         }\r
  97 \r
  98         @Override\r
  99         public void notifyObservers()\r
 100         {\r
 101                 observers.forEach(ob -> ob.update(this));\r
 102         }\r
 103 \r
 104 }\r