fixed bend point NPE.

refs 352

org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editpart/ConnectionEditPartBase.java

@@ -66,6 +66,13 @@ import org.fortiss.tooling.kernel.ui.service.IModelElementHandlerService;
 public abstract class ConnectionEditPartBase<T extends ConnectionSegmentBase>
 		extends AbstractConnectionEditPart {
 
+	/**
+	 * Stores the diagram layout configuration. Since connections are contained
+	 * in the root layer, the configuration must be stored here. The parent
+	 * cannot be used.
+	 */
+	protected final IDiagramLayoutConfiguration layoutConfiguration;
+
 	/** The underlying model object. */
 	protected final T modelElement;
 
@@ -97,8 +104,10 @@ public abstract class ConnectionEditPartBase<T extends ConnectionSegmentBase>
 
 	/** Constructor. */
 	@SuppressWarnings("unchecked")
-	protected ConnectionEditPartBase(T modelElement) {
+	protected ConnectionEditPartBase(T modelElement,
+			IDiagramLayoutConfiguration layoutConfiguration) {
 		this.modelElement = modelElement;
+		this.layoutConfiguration = layoutConfiguration;
 		setModel(modelElement);
 		this.modelElementHandler = (IModelElementHandler<T>) IModelElementHandlerService.INSTANCE
 				.getModelElementHandler(modelElement);
@@ -276,15 +285,11 @@ public abstract class ConnectionEditPartBase<T extends ConnectionSegmentBase>
 
 	/**
 	 * Returns the layout configuration for the diagram containing this
-	 * connection edit part. This method delegates to its parent graphical edit
-	 * part.
+	 * connection edit part. This method delegates does not delegate to the
+	 * parent edit part, since the parent is the root layer, unfortunately not
+	 * the diagram edit part.
 	 */
-	@SuppressWarnings("rawtypes")
 	public IDiagramLayoutConfiguration getLayoutConfiguration() {
-		if (getParent() instanceof GraphicalEditPartBase) {
-			return ((GraphicalEditPartBase) getParent())
-					.getLayoutConfiguration();
-		}
-		return null;
+		return layoutConfiguration;
 	}
 }