1 files changed, 34 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/RederivableNode.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/RederivableNode.java
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index 00000000..cae78d37
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/RederivableNode.java
@@ -0,0 +1,34 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2016, 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;
+
+/**
+ * A rederivable node can potentially re-derive tuples after the Rete network has finished the delivery of messages.  
+ * 
+ * @author Tamas Szabo
+ * @since 1.6
+ */
+public interface RederivableNode extends Node, IGroupable {
+
+    /**
+     * The method is called by the {@link ReteContainer} to re-derive tuples after the normal messages have been 
+     * delivered and consumed. The re-derivation process may trigger the creation and delivery of further messages 
+     * and further re-derivation rounds.  
+     */
+    public void rederiveOne();
+    
+    /**
+     * Returns true if this node actually runs in DRed mode (not necessarily). 
+     * 
+     * @return true if the node is operating in DRed mode
+     * @since 2.0
+     */
+    public boolean isInDRedMode();
+    
+}