1 files changed, 32 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-base/src/main/java/tools/refinery/viatra/runtime/base/api/LightweightEObjectObserver.java b/subprojects/viatra-runtime-base/src/main/java/tools/refinery/viatra/runtime/base/api/LightweightEObjectObserver.java
new file mode 100644
index 00000000..f0245b5d
--- /dev/null
+++ b/subprojects/viatra-runtime-base/src/main/java/tools/refinery/viatra/runtime/base/api/LightweightEObjectObserver.java
@@ -0,0 +1,32 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2013, Abel Hegedus, Istvan Rath and Daniel Varro
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-v20.html.
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ *******************************************************************************/
+package tools.refinery.viatra.runtime.base.api;
+
+import org.eclipse.emf.common.notify.Notification;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.EStructuralFeature;
+
+
+/**
+ * Listener interface for lightweight observation on EObject feature value changes.
+ * 
+ * @author Abel Hegedus
+ *
+ */
+public interface LightweightEObjectObserver {
+    
+    /**
+     * 
+     * @param host
+     * @param feature
+     * @param notification
+     */
+    void notifyFeatureChanged(EObject host, EStructuralFeature feature, Notification notification);
+    
+}