plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/MachineContext.java

   1 package net.mograsim.plugin;
   2
   3 import java.util.HashSet;
   4 import java.util.Optional;
   5 import java.util.Set;
   6
   7 import net.mograsim.machine.Machine;
   8 import net.mograsim.machine.MachineRegistry;
   9 import net.mograsim.plugin.nature.ProjectMachineContext;
  10
  11 /**
  12  * @deprecated use the {@link ProjectMachineContext} instead to make the context project dependent.
  13  */
  14 @Deprecated(forRemoval = true)
  15 public class MachineContext
  16 {
  17         private Machine machine;
  18         private Set<ContextObserver> observers;
  19         private static MachineContext instance;
  20
  21         private MachineContext()
  22         {
  23                 observers = new HashSet<>();
  24         }
  25
  26         public static MachineContext getInstance()
  27         {
  28                 if (instance == null)
  29                 {
  30                         instance = new MachineContext();
  31                         // TODO don't hardcode the Am2900
  32                         instance.setMachine(MachineRegistry.getMachine("Am2900").createNew());
  33                 }
  34                 return instance;
  35         }
  36
  37         public Machine getMachine()
  38         {
  39                 return machine;
  40         }
  41
  42         public void setMachine(Machine machine)
  43         {
  44                 this.machine = machine;
  45                 notifyObservers(machine);
  46         }
  47
  48         public void registerObserver(ContextObserver ob)
  49         {
  50                 observers.add(ob);
  51                 ob.setMachine(Optional.ofNullable(machine));
  52         }
  53
  54         public void deregisterObserver(ContextObserver ob)
  55         {
  56                 observers.remove(ob);
  57         }
  58
  59         private void notifyObservers(Machine machine)
  60         {
  61                 observers.forEach(ob -> ob.setMachine(Optional.ofNullable(machine)));
  62         }
  63
  64         @FunctionalInterface
  65         public static interface ContextObserver
  66         {
  67                 void setMachine(Optional<Machine> machine);
  68         }
  69 }