2 * Copyright (c) 2019 PANTHEON.tech, s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.rfc7952.data.api;
10 import com.google.common.annotations.Beta;
11 import com.google.common.collect.ImmutableMap;
12 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
13 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriterExtension;
16 * Extension to the NormalizedNodeStreamWriter with metadata support. Semantically this extends the event model of
17 * {@link NormalizedNodeStreamWriter} with a new event, {@link #metadata(ImmutableMap)}. This event is valid on any
18 * open node. This event may be emitted only once.
21 * Note that some implementations of this interface, notably those targeting streaming XML, may require metadata to
22 * be emitted before any other events. Such requirement is communicated through {@link #requireMetadataFirst()} and
23 * users must honor it. If such requirement is not set, metadata may be emitted at any time.
26 * Furthermore implementations targeting RFC7952 encoding towards external systems are required to handle metadata
27 * attached to {@code leaf-list} and {@code list} nodes by correctly extending them to each entry.
30 public interface NormalizedMetadataStreamWriter extends NormalizedNodeStreamWriterExtension, StreamWriterMethods {