remove attributes in task

statemachine.task/src/main/jastadd/Navigation.jrag

@@ -6,53 +6,44 @@ aspect Navigation {
 
   /** Check, whether an this element is a state */
   syn boolean Element.isState() = false;
-  eq State.isState() = true;
 
   /** View this element as a state */
   syn State Element.asState() = null;
-  eq State.asState() = this;
 
   /** Check, whether an this element is a transition */
   syn boolean Element.isTransition() = false;
-  eq Transition.isTransition() = true;
 
   /** View this element as a transition */
   syn Transition Element.asTransition() = null;
-  eq Transition.asTransition() = this;
 
   /** Get all states */
   syn List<State> StateMachine.states() {
     List<State> states = new ArrayList<>();
-    for (Element element: getElementList()) {
-      if (element.isState()) {
-        states.add(element.asState());
-      }
-    }
+    // TODO implement
     return states;
   }
 
   /** Get all transitions */
   syn List<Transition> StateMachine.transitions() {
     List<Transition> transitions = new ArrayList<>();
-    for (Element element: getElementList()) {
-      if (element.isTransition()) {
-        transitions.add(element.asTransition());
-      }
-    }
+    // TODO implement
     return transitions;
   }
 
   /** Get the state machine the element is contained in */
   inh StateMachine Element.containingStateMachine();
-  eq StateMachine.getElement().containingStateMachine() = this;
+  // the following equation is only there to make the progam compile, it must be replaced by a reasonable alternative
+  eq ASTNode.getChild().containingStateMachine() = null;
 
   /** Determine whether the State is final */
-  syn boolean State.isInitial() = containingStateMachine().getInitial().equals(this);
+  syn boolean State.isInitial() = false;
 
   /** Determine whether the State is final */
-  syn boolean State.isFinal() = containingStateMachine().getFinalList().contains(this);
+  syn boolean State.isFinal() = false;
 
   /** Get all successor states */
-  syn Collection<State> State.successors() = getOutgoingList().stream().map(Transition::getTo).collect(Collectors.toList());
+  syn Collection<State> State.successors() {
+    return new ArrayList<>();
+  }
 
 }