1 files changed, 28 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/index/DefaultIndexerListener.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/index/DefaultIndexerListener.java
new file mode 100644
index 00000000..6306a482
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/index/DefaultIndexerListener.java
@@ -0,0 +1,28 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2012, 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.rete.index;
+
+import java.lang.ref.WeakReference;
+
+import tools.refinery.viatra.runtime.rete.network.Node;
+
+public abstract class DefaultIndexerListener implements IndexerListener {
+
+    WeakReference<Node> owner;
+
+    public DefaultIndexerListener(Node owner) {
+        this.owner = new WeakReference<Node>(owner);
+    }
+
+    @Override
+    public Node getOwner() {
+        return owner.get();
+    }
+
+}