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   1 package net.mograsim.logic.model.snippets.highlevelstatehandlers.standard.subcomponent;
   2
   3 import java.util.function.Consumer;
   4
   5 import net.mograsim.logic.model.model.components.ModelComponent;
   6 import net.mograsim.logic.model.model.components.submodels.SubmodelComponent;
   7 import net.mograsim.logic.model.serializing.IdentifyParams;
   8 import net.mograsim.logic.model.snippets.SnippetDefinintion;
   9 import net.mograsim.logic.model.snippets.highlevelstatehandlers.standard.StandardHighLevelStateHandlerSnippetSuppliers;
  10
  11 public class DelegatingSubcomponentHighLevelStateHandler implements SubcomponentHighLevelStateHandler
  12 {
  13         private final SubmodelComponent parentComponent;
  14         private ModelComponent delegateTarget;
  15         private String prefix;
  16
  17         public DelegatingSubcomponentHighLevelStateHandler(SubmodelComponent component)
  18         {
  19                 this(component, null);
  20         }
  21
  22         public DelegatingSubcomponentHighLevelStateHandler(SubmodelComponent component,
  23                         DelegatingSubcomponentHighLevelStateHandlerParams params)
  24         {
  25                 this.parentComponent = component;
  26                 if (params != null)
  27                 {
  28                         // TODO document this
  29                         if (params.delegateTarget == null)
  30                                 setDelegateTarget(parentComponent);
  31                         else
  32                         {
  33                                 ModelComponent delegateTarget = parentComponent.submodel.getComponentsByName().get(params.delegateTarget);
  34                                 if (delegateTarget == null)
  35                                         throw new NullPointerException("No subcomponent with name " + params.delegateTarget);
  36                                 setDelegateTarget(delegateTarget);
  37                         }
  38                         setPrefix(params.prefix);
  39                 }
  40                 parentComponent.submodel.addComponentRemovedListener(c ->
  41                 {
  42                         if (delegateTarget == c)
  43                                 delegateTarget = null;
  44                 });
  45         }
  46
  47         public void set(ModelComponent delegateTarget, String prefix)
  48         {
  49                 setDelegateTarget(delegateTarget);
  50                 setPrefix(prefix);
  51         }
  52
  53         public void setDelegateTarget(ModelComponent delegateTarget)
  54         {
  55                 if (delegateTarget == null)
  56                         this.delegateTarget = parentComponent;
  57                 else if (parentComponent.submodel.getComponentsByName().get(delegateTarget.getName()) != delegateTarget)
  58                         throw new IllegalArgumentException(
  59                                         "Can only set components belonging to the submodel of the parent component of this handler as the delegate target");
  60                 this.delegateTarget = delegateTarget;
  61         }
  62
  63         public ModelComponent getDelegateTarget()
  64         {
  65                 return delegateTarget;
  66         }
  67
  68         public void setPrefix(String prefix)
  69         {
  70                 this.prefix = prefix;
  71         }
  72
  73         public String getPrefix()
  74         {
  75                 return prefix;
  76         }
  77
  78         @Override
  79         public Object getHighLevelState(String subStateID)
  80         {
  81                 checkTarget();
  82                 return delegateTarget.getHighLevelState(getDelegateTargetHighLevelStateID(subStateID));
  83         }
  84
  85         @Override
  86         public void setHighLevelState(String subStateID, Object newState)
  87         {
  88                 checkTarget();
  89                 delegateTarget.setHighLevelState(getDelegateTargetHighLevelStateID(subStateID), newState);
  90         }
  91
  92         @Override
  93         public void addListener(String subStateID, Consumer<Object> stateChanged)
  94         {
  95                 checkTarget();
  96                 delegateTarget.addHighLevelStateListener(getDelegateTargetHighLevelStateID(subStateID), stateChanged);
  97         }
  98
  99         @Override
 100         public void removeListener(String subStateID, Consumer<Object> stateChanged)
 101         {
 102                 checkTarget();
 103                 delegateTarget.removeHighLevelStateListener(getDelegateTargetHighLevelStateID(subStateID), stateChanged);
 104         }
 105
 106         private void checkTarget()
 107         {
 108                 if (delegateTarget == null)
 109                         throw new IllegalStateException("Delegating to a component that was destroyed");
 110         }
 111
 112         private String getDelegateTargetHighLevelStateID(String subStateID)
 113         {
 114                 return prefix == null ? subStateID : prefix + '.' + subStateID;
 115         }
 116
 117         @Override
 118         public String getIDForSerializing(IdentifyParams idParams)
 119         {
 120                 return "delegating";
 121         }
 122
 123         @Override
 124         public DelegatingSubcomponentHighLevelStateHandlerParams getParamsForSerializing(IdentifyParams idParams)
 125         {
 126                 checkTarget();
 127                 DelegatingSubcomponentHighLevelStateHandlerParams params = new DelegatingSubcomponentHighLevelStateHandlerParams();
 128                 params.delegateTarget = delegateTarget == parentComponent ? null : delegateTarget.getName();
 129                 params.prefix = prefix;
 130                 return params;
 131         }
 132
 133         public static class DelegatingSubcomponentHighLevelStateHandlerParams
 134         {
 135                 public String delegateTarget;
 136                 public String prefix;
 137         }
 138
 139         static
 140         {
 141                 StandardHighLevelStateHandlerSnippetSuppliers.subcomponentHandlerSupplier
 142                                 .setSnippetSupplier(DelegatingSubcomponentHighLevelStateHandler.class.getCanonicalName(), SnippetDefinintion
 143                                                 .create(DelegatingSubcomponentHighLevelStateHandlerParams.class, DelegatingSubcomponentHighLevelStateHandler::new));
 144         }
 145 }