FIXED: YAKHMI-10 Incoming transitions are not correctly removed when deleting a vertex

plugins/org.yakindu.sct.ui.editor/src/org/yakindu/sct/ui/editor/edithelper/VertexEditHelper.java

@@ -1,8 +1,15 @@
 package org.yakindu.sct.ui.editor.edithelper;
 
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.gmf.runtime.common.core.command.CompositeCommand;
 import org.eclipse.gmf.runtime.common.core.command.ICommand;
+import org.eclipse.gmf.runtime.emf.type.core.commands.DestroyElementCommand;
 import org.eclipse.gmf.runtime.emf.type.core.edithelper.AbstractEditHelper;
 import org.eclipse.gmf.runtime.emf.type.core.requests.CreateRelationshipRequest;
+import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyDependentsRequest;
+import org.eclipse.gmf.runtime.emf.type.core.requests.DestroyElementRequest;
+import org.yakindu.sct.model.sgraph.Transition;
+import org.yakindu.sct.model.sgraph.Vertex;
 import org.yakindu.sct.ui.editor.commands.CreateTransitionCommand;
 
 /**
@@ -22,4 +29,22 @@ public class VertexEditHelper extends AbstractEditHelper {
 			CreateRelationshipRequest req) {
 		return new CreateTransitionCommand(req);
 	}
+
+	@Override
+	protected ICommand getDestroyDependentsCommand(DestroyDependentsRequest req) {
+		Vertex elementToDestroy = (Vertex) req.getElementToDestroy();
+		EList<Transition> incomingTransitions = elementToDestroy
+				.getIncomingTransitions();
+		if (incomingTransitions.size() != 0) {
+			CompositeCommand compoundCommand = new CompositeCommand(
+					"Delete vertex");
+			for (Transition transition : incomingTransitions) {
+				DestroyElementCommand destroyCommand = new DestroyElementCommand(
+						new DestroyElementRequest(transition, false));
+				compoundCommand.add(destroyCommand);
+			}
+			return compoundCommand;
+		}
+		return super.getDestroyDependentsCommand(req);
+	}
 }