added a small utility function

org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/utils/KernelModelElementUtils.java

@@ -32,7 +32,7 @@ import org.fortiss.tooling.kernel.service.IPersistencyService;
  * @author hoelzl
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating YELLOW Hash: E77DC792D810E6886DD06EC35AB21D0D
+ * @ConQAT.Rating YELLOW Hash: 4C3069E19588989D191FB58D5D51CE66
  */
 public final class KernelModelElementUtils {
 
@@ -138,4 +138,34 @@ public final class KernelModelElementUtils {
 		}
 		return null;
 	}
+
+	/**
+	 * Computes the qualified name relative to a parent element.
+	 * 
+	 * @param parent
+	 *            the parent element.
+	 * @param element
+	 *            the element whose relative name will be computed.
+	 * @return the qualified name relative to the parent element or null if the
+	 *         parent element is not a container for element
+	 */
+	public static String computeRelativeName(INamedElement parent,
+			INamedElement element) {
+		String qualifiedName = element.getName();
+
+		EObject current = element.eContainer();
+		while (current != null && current != parent) {
+			if (current instanceof INamedElement) {
+				qualifiedName = ((INamedElement) current).getName() + "."
+						+ qualifiedName;
+			}
+			current = current.eContainer();
+		}
+
+		if (current == null) {
+			return null;
+		}
+
+		return qualifiedName;
+	}
 }