1 files changed, 39 insertions, 0 deletions
diff --git a/incoming/org.eclipse.papyrus.uml.diagram.timing/custom-src/org/eclipse/papyrus/uml/diagram/timing/custom/utils/InteractionUtils.java b/incoming/org.eclipse.papyrus.uml.diagram.timing/custom-src/org/eclipse/papyrus/uml/diagram/timing/custom/utils/InteractionUtils.java
new file mode 100644
index 00000000000..47411ed8c7e
--- /dev/null
+++ b/incoming/org.eclipse.papyrus.uml.diagram.timing/custom-src/org/eclipse/papyrus/uml/diagram/timing/custom/utils/InteractionUtils.java
@@ -0,0 +1,39 @@
+/*******************************************************************************
+ * Copyright (c) 2012 CEA LIST.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *******************************************************************************/
+package org.eclipse.papyrus.uml.diagram.timing.custom.utils;
+
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.uml2.uml.Interaction;
+
+/** Utility class for manipulating {@link Interaction}s */
+public final class InteractionUtils {
+
+	private InteractionUtils() {
+		// utility class
+	}
+
+	/**
+	 * Return the {@link Interaction} containing the given model element if any, or <code>null</code> if the element is
+	 * not recursively contained in any {@link Interaction}.
+	 * 
+	 * @param eObject
+	 *            the model element for which we want to find the containing {@link Interaction}.
+	 * @return the parent {@link Interaction} or <code>null</code> if none.
+	 */
+	public static Interaction getContainingInteraction(final EObject eObject) {
+		if (eObject != null) {
+			if (eObject instanceof Interaction) {
+				return (Interaction) eObject;
+			}
+			final EObject eContainer = eObject.eContainer();
+			return getContainingInteraction(eContainer);
+		}
+		return null;
+	}
+}