- Move getFirstChildWithType() from ExplorationUtils to EcoreUtils

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

@@ -241,6 +241,31 @@ public class EcoreUtils {
 		return children;
 	}
 
+	/**
+	 * For a given {@link EObject}, recursively returns the first child that has a certain type.
+	 * Using this method is more efficient than returning the first element of the result of
+	 * {@link #getChildrenWithType(EObject, Class)}.
+	 * 
+	 * @param parent
+	 *            the parent {@link EObject}
+	 * @param type
+	 *            the type
+	 * 
+	 * @return the first child of the given type.
+	 */
+	@SuppressWarnings("unchecked")
+	public static <S> S getFirstChildWithType(EObject parent, Class<S> type) {
+		TreeIterator<EObject> content = EcoreUtil.getAllContents(parent, true);
+
+		while(content.hasNext()) {
+			EObject child = content.next();
+			if(type.isAssignableFrom(child.getClass())) {
+				return (S)child;
+			}
+		}
+		return null;
+	}
+
 	/**
 	 * Returns a list of all parent {@link EObject}s that have the type <code>T</code>. If none are
 	 * found, an empty list is returned.