1 files changed, 30 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/NetworkStructureChangeSensitiveNode.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/NetworkStructureChangeSensitiveNode.java
new file mode 100644
index 00000000..c6ba34c4
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/NetworkStructureChangeSensitiveNode.java
@@ -0,0 +1,30 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2019, Tamas Szabo, 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.network;
+
+import tools.refinery.viatra.runtime.rete.network.communication.CommunicationTracker;
+
+/**
+ * {@link Node}s implementing this interface are sensitive to changes in the dependency graph maintained by the
+ * {@link CommunicationTracker}. The {@link CommunicationTracker} notifies these nodes whenever the SCC of this node is
+ * affected by changes to the dependency graph. Depending on whether this node is contained in a recursive group or not,
+ * it may behave differently, and the {@link NetworkStructureChangeSensitiveNode#networkStructureChanged()} method can
+ * be used to perform changes in behavior.
+ * 
+ * @author Tamas Szabo
+ * @since 2.3
+ */
+public interface NetworkStructureChangeSensitiveNode extends Node {
+
+    /**
+     * At the time of the invocation, the dependency graph has already been updated.
+     */
+    public void networkStructureChanged();
+
+}