adds a proper exception for "transformation chain not found"

refs 2352

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

@@ -31,7 +31,7 @@ import org.fortiss.tooling.kernel.service.ITransformationService;
  * @author hoelzl
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating YELLOW Hash: 8B88DE0F53EE7561C069D2660CF31843
+ * @ConQAT.Rating YELLOW Hash: 17FC59906F6D71B73FF93580315EC8FD
  */
 public final class TransformationUtils {
 
@@ -80,14 +80,42 @@ public final class TransformationUtils {
 		if(e != null) {
 			throw new ChainTransformationFailedException(null, null, null, e);
 		}
-		throw new ChainTransformationFailedException(null, null, null, null) {
-			/** {@inheritDoc} */
-			@Override
-			public String getMessage() {
-				return "No transformation chain found from " + sourceElement + " to " +
-						targetClass.getName();
-			}
-		};
+		throw new NoTransformationChainFound(sourceElement, targetClass);
+	}
+
+	/** Exception thrown when no transformation chain was found. */
+	public static class NoTransformationChainFound extends ChainTransformationFailedException {
+
+		/** Element which we were trying to transform last. */
+		private EObject sourceElement;
+
+		/** Class which was targeted for that element. */
+		private Class<?> targetClass;
+
+		/** Constructor. */
+		public NoTransformationChainFound(EObject sourceElement, Class<?> targetClass) {
+			super(null, null, null, null);
+			this.sourceElement = sourceElement;
+			this.targetClass = targetClass;
+		}
+
+		/** {@inheritDoc} */
+		@Override
+		public String getMessage() {
+			return "No transformation chain found from " + sourceElement + " to " +
+					targetClass.getName();
+		}
+
+		/** Returns sourceElement. */
+		public EObject getSourceElement() {
+			return sourceElement;
+		}
+
+		/** Returns targetClass. */
+		public Class<?> getTargetClass() {
+			return targetClass;
+		}
+
 	}
 
 	/**