1 files changed, 34 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/communication/PhasedSelector.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/communication/PhasedSelector.java
new file mode 100644
index 00000000..41cd8cd3
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/network/communication/PhasedSelector.java
@@ -0,0 +1,34 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2017, 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.communication;
+
+/**
+ * A default message selector that can be used to associate phases to messages. 
+ * 
+ * @author Tamas Szabo
+ * @since 2.3
+ */
+public enum PhasedSelector implements MessageSelector {
+    
+    /**
+     * No special distinguishing feature
+     */
+    DEFAULT,
+    
+    /**
+     * Inserts and delete-insert monotone change pairs
+     */
+    MONOTONE,
+    
+    /**
+     * Deletes
+     */
+    ANTI_MONOTONE
+    
+}