2 * Copyright (c) 2015 Cisco Systems, Inc. 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.mdsal.binding.dom.codec.impl;
10 import java.io.IOException;
11 import org.opendaylight.yangtools.yang.binding.BindingSerializer;
12 import org.opendaylight.yangtools.yang.binding.BindingStreamEventWriter;
13 import org.opendaylight.yangtools.yang.binding.DataObject;
14 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
15 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
18 * Serializer of Binding objects to Normalized Node which uses {@link BindingNormalizedNodeCache} to
19 * cache already serialized values.
21 * This serializer implements {@link BindingStreamEventWriter} along with {@link BindingSerializer}.
23 * {@link BindingSerializer} interface is used by generated implementations of
24 * {@link org.opendaylight.yangtools.yang.binding.DataObjectSerializer} to provide Binding object
25 * for inspection and to prevent streaming of already serialized object.
28 final class CachingNormalizedNodeSerializer extends ForwardingBindingStreamEventWriter implements
29 BindingSerializer<Object, DataObject> {
31 private final NormalizedNodeResult domResult;
32 private final NormalizedNodeWriterWithAddChild domWriter;
33 private final BindingToNormalizedStreamWriter delegate;
34 private final AbstractBindingNormalizedNodeCacheHolder cacheHolder;
36 CachingNormalizedNodeSerializer(final AbstractBindingNormalizedNodeCacheHolder cacheHolder,
37 final DataContainerCodecContext<?, ?> subtreeRoot) {
38 this.cacheHolder = cacheHolder;
39 this.domResult = new NormalizedNodeResult();
40 this.domWriter = new NormalizedNodeWriterWithAddChild(domResult);
41 this.delegate = BindingToNormalizedStreamWriter.create(subtreeRoot, domWriter);
45 protected BindingStreamEventWriter delegate() {
49 NormalizedNode<?, ?> build() {
50 return domResult.getResult();
54 * Serializes input if it is cached, returns null otherwise.
56 * If input is cached it uses {@link NormalizedNodeWriterWithAddChild#addChild(NormalizedNode)}
57 * to provide already serialized value to underlying NormalizedNodeWriter in order to reuse
58 * value instead of creating new one using Normalized Node stream APIs.
60 * Note that this optional is serialization of child node invoked from
61 * {@link org.opendaylight.yangtools.yang.binding.DataObjectSerializer}, which may opt-out from
62 * streaming of data when non-null result is returned.
65 public NormalizedNode<?, ?> serialize(final DataObject input) {
66 final BindingNormalizedNodeCache cachingSerializer = getCacheSerializer(input.getImplementedInterface());
67 if (cachingSerializer != null) {
68 final NormalizedNode<?, ?> domData = cachingSerializer.get(input);
69 domWriter.addChild(domData);
75 @SuppressWarnings({"rawtypes", "unchecked"})
76 private BindingNormalizedNodeCache getCacheSerializer(final Class type) {
77 if (cacheHolder.isCached(type)) {
78 final DataContainerCodecContext<?, ?> currentCtx = (DataContainerCodecContext<?, ?>) delegate.current();
79 if (type.equals(currentCtx.getBindingClass())) {
80 return cacheHolder.getCachingSerializer(currentCtx);
82 return cacheHolder.getCachingSerializer(currentCtx.streamChild(type));
88 * Serializes supplied data using stream writer with child cache enabled or using cache directly
89 * if cache is avalaible also for supplied Codec node.
91 * @param cacheHolder Binding to Normalized Node Cache holder
92 * @param subtreeRoot Codec Node for provided data object
93 * @param data Data to be serialized
94 * @return Normalized Node representation of data.
96 static NormalizedNode<?, ?> serialize(final AbstractBindingNormalizedNodeCacheHolder cacheHolder,
97 final DataContainerCodecContext<?, ?> subtreeRoot, final DataObject data) {
98 final BindingNormalizedNodeCache cache = cacheHolder.getCachingSerializer(subtreeRoot);
100 return cache.get(data);
102 return serializeUsingStreamWriter(cacheHolder, subtreeRoot, data);
106 * Serializes supplied data using stream writer with child cache enabled.
108 * @param cacheHolder Binding to Normalized Node Cache holder
109 * @param subtreeRoot Codec Node for provided data object
110 * @param data Data to be serialized
111 * @return Normalized Node representation of data.
113 static NormalizedNode<?, ?> serializeUsingStreamWriter(final AbstractBindingNormalizedNodeCacheHolder cacheHolder,
114 final DataContainerCodecContext<?, ?> subtreeRoot, final DataObject data) {
115 final CachingNormalizedNodeSerializer writer = new CachingNormalizedNodeSerializer(cacheHolder, subtreeRoot);
117 subtreeRoot.eventStreamSerializer().serialize(data, writer);
118 return writer.build();
119 } catch (final IOException e) {
120 throw new RuntimeException(e);