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diff --git a/opendaylight/commons/concepts/src/main/java/org/opendaylight/controller/concepts/tranform/RuleBasedTransformer.java b/opendaylight/commons/concepts/src/main/java/org/opendaylight/controller/concepts/tranform/RuleBasedTransformer.java
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+++ b/opendaylight/commons/concepts/src/main/java/org/opendaylight/controller/concepts/tranform/RuleBasedTransformer.java
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+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.concepts.tranform;
+
+import java.util.Set;
+
+/**
+ * Transformer with set of acceptance rules
+ * 
+ * The transformer provides a set of {@link Acceptor}s, which could be used to
+ * verify if the input will produce result using the transformer.
+ * 
+ * The transormer is able to produce result if ANY of associated
+ * {@link Acceptor}s accepted result.
+ * 
+ * @author Tony Tkacik
+ * 
+ * @param <I>
+ *            Input class for transformation
+ * @param <P>
+ *            Product of transformation
+ */
+public interface RuleBasedTransformer<I, P> extends Transformer<I, P> {
+
+    /**
+     * Set of {@link Acceptor}, which could be used to verify if the input is
+     * usable by transformer.
+     * 
+     * The transformer is able to produce result if ANY of associated
+     * {@link Acceptor}s accepted result.
+     * 
+     * @return Set of input acceptance rules associated to this transformer.
+     */
+    Set<Acceptor<I>> getRules();
+
+}