--- /dev/null
+/*
+ * Copyright (c) 2017 Pantheon Technologies, s.r.o. 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.mdsal.binding.dom.codec.impl;
+
+import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeCodec;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+
+/**
+ * Marker interface for codecs dealing with RPC input being potentially unmapped. We use this interface to mark both
+ * {@link UnmappedRpcInputCodec} and {@link ContainerNodeCodecContext}, which results in bimorphic invocation in
+ * {@link BindingNormalizedNodeCodecRegistry#fromNormalizedNodeRpcData()}.
+ *
+ * <p>
+ * Without this interface we could end up with megamorphic invocation, as the two implementations cannot share class
+ * hierarchy.
+ *
+ * @author Robert Varga
+ *
+ * @param <T> Binding representation of data
+ */
+interface RpcInputCodec<D extends DataObject> extends BindingNormalizedNodeCodec<D> {
+
+}