+/*
+ * Copyright (c) 2015 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.yangtools.yang.data.impl.schema.transform.base.parser;
+
+import java.util.Map;
+import javax.annotation.Nullable;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeBuilder;
+import org.opendaylight.yangtools.yang.data.impl.schema.transform.ToNormalizedNodeParser;
+
+/**
+ * Extensible parser allows its subclasses to customize the building process of normalized nodes
+ *
+ * @param <P>
+ * @param <E>
+ * @param <N>
+ * @param <S>
+ */
+public interface ExtensibleParser<P extends YangInstanceIdentifier.PathArgument, E, N extends NormalizedNode<P, ?>, S>
+ extends ToNormalizedNodeParser<E, N, S> {
+
+ /**
+ * Provide building strategy
+ */
+ BuildingStrategy<P, N> getBuildingStrategy();
+
+ /**
+ * Building strategy serves as a set of hooks into the parsing process.
+ *
+ * @param <P>
+ * @param <N>
+ */
+ interface BuildingStrategy<P extends YangInstanceIdentifier.PathArgument, N extends NormalizedNode<P, ?>> {
+
+ /**
+ * Build normalized node from its builder
+ *
+ * @param builder filled builder for node
+ * @return built normalized node or null if the node should not be built
+ */
+ @Nullable N build(NormalizedNodeBuilder<P, ?, N> builder);
+
+ /**
+ * Hook for subclasses to handle attributes associated with current node. This is called before the build method
+ * and allows subclasses to react to node's attributes e.g. modification operation
+ *
+ * @param attributes attributes for node
+ * @param containerBuilder builder created for node. Can be modified according to attributes e.g. remove attribute
+ */
+ void prepareAttributes(Map<QName, String> attributes, NormalizedNodeBuilder<P, ?, N> containerBuilder);
+ }
+}