fixed a bug where connection service throw class cast exception

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

@@ -27,6 +27,7 @@ import org.eclipse.draw2d.Figure;
 import org.eclipse.draw2d.IFigure;
 import org.eclipse.draw2d.Label;
 import org.eclipse.draw2d.PositionConstants;
+import org.eclipse.draw2d.TreeSearch;
 import org.eclipse.draw2d.XYLayout;
 import org.eclipse.draw2d.geometry.Insets;
 import org.eclipse.draw2d.geometry.Rectangle;
@@ -46,7 +47,7 @@ import org.fortiss.tooling.kernel.model.INamedCommentedElement;
  * @author mou
  * @author $Author: hoelzl $
  * @version $Rev: 8344 $
- * @ConQAT.Rating YELLOW Hash: EEB93FADF83491DB779EE5D849CCF0C8
+ * @ConQAT.Rating YELLOW Hash: 37E1662327ADFEAA93E620275D1FCB0B
  */
 public abstract class SubDiagramEditPartBase<T extends ILayoutedModelElement & INamedCommentedElement>
 		extends ElementEditPartBase<T> {
@@ -88,18 +89,13 @@ public abstract class SubDiagramEditPartBase<T extends ILayoutedModelElement & I
 	/** {@inheritDoc} */
 	@Override
 	protected Rectangle determineBaseFigureBounds() {
-		Rectangle result = null;
+		Rectangle result = new Rectangle();
 		for(Object o : getModelChildren()) {
 			if(o instanceof ILayoutedModelElement) {
 				Rectangle p = LayoutDataUtils.getNodeBounds((ILayoutedModelElement)o);
-				result = p.getUnion(result);
+				result.union(p);
 			}
 		}
-		if(result == null) {
-			result = new Rectangle();
-		}
-		result.setLocation(DEFAULT_GRID_SIZE, DEFAULT_GRID_SIZE);
-		result.expand(DEFAULT_GRID_SIZE, DEFAULT_GRID_SIZE);
 		result.resize(DEFAULT_GRID_SIZE, DEFAULT_GRID_SIZE);
 		return result;
 	}
@@ -133,6 +129,20 @@ public abstract class SubDiagramEditPartBase<T extends ILayoutedModelElement & I
 				protected boolean useLocalCoordinates() {
 					return true;
 				}
+
+				/** {@inheritDoc} */
+				@Override
+				public IFigure findFigureAt(int x, int y, TreeSearch search) {
+					// transparent
+					return null;
+				}
+
+				/** {@inheritDoc} */
+				@Override
+				public boolean isOpaque() {
+					// transparent
+					return false;
+				}
 			};
 			labelFigureLayer.setLayoutManager(new XYLayout());
 			super.registerLabelFigure(labelFigureLayer);

org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/ConnectionCompositorService.java

@@ -106,9 +106,14 @@ public class ConnectionCompositorService extends
 			return null;
 		}
 		for(IConnectionCompositor<EObject, EObject, EObject> connector : list) {
+			try {
 				if(connector.canConnect(source, target, parent, context)) {
 					return connector;
 				}
+			} catch(ClassCastException e) {
+				// the container class is not ensured to be compatible. so we ignore all such kinds
+				// of exceptions here
+			}
 		}
 		return null;
 	}