2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2020 Nordix Foundation
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 * SPDX-License-Identifier: Apache-2.0
17 * ============LICENSE_END=========================================================
20 package org.onap.cps.utils;
22 import com.google.gson.stream.JsonReader;
24 import java.io.IOException;
25 import java.io.StringReader;
26 import java.util.Collection;
27 import java.util.Iterator;
28 import java.util.ServiceLoader;
29 import java.util.logging.Logger;
30 import org.onap.cps.api.impl.Fragment;
31 import org.opendaylight.yangtools.yang.common.QName;
32 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
33 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
34 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
35 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
36 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
37 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
38 import org.opendaylight.yangtools.yang.data.api.schema.ValueNode;
39 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
40 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
41 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
42 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
43 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
44 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
45 import org.opendaylight.yangtools.yang.model.api.Module;
46 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
47 import org.opendaylight.yangtools.yang.model.parser.api.YangParser;
48 import org.opendaylight.yangtools.yang.model.parser.api.YangParserException;
49 import org.opendaylight.yangtools.yang.model.parser.api.YangParserFactory;
50 import org.opendaylight.yangtools.yang.model.repo.api.StatementParserMode;
51 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
53 public class YangUtils {
55 private static final YangParserFactory PARSER_FACTORY;
57 private static final Logger LOGGER = Logger.getLogger(YangUtils.class.getName());
60 throw new IllegalStateException("Utility class");
64 final Iterator<YangParserFactory> it = ServiceLoader.load(YangParserFactory.class).iterator();
66 throw new IllegalStateException("No YangParserFactory found");
68 PARSER_FACTORY = it.next();
72 * Parse a file containing yang modules.
74 * @param yangModelFile a file containing one or more yang modules. The file has to have a .yang extension.
75 * @return a SchemaContext representing the yang model
76 * @throws IOException when the system as an IO issue
77 * @throws YangParserException when the file does not contain a valid yang structure
79 public static SchemaContext parseYangModelFile(final File yangModelFile) throws IOException, YangParserException {
80 final YangTextSchemaSource yangTextSchemaSource = YangTextSchemaSource.forFile(yangModelFile);
81 final YangParser yangParser = PARSER_FACTORY
82 .createParser(StatementParserMode.DEFAULT_MODE);
83 yangParser.addSource(yangTextSchemaSource);
84 return yangParser.buildEffectiveModel();
88 * Parse a file containing json data for a certain model (schemaContext).
90 * @param jsonData a string containing json data for the given model
91 * @param schemaContext the SchemaContext for the given data
92 * @return the NormalizedNode representing the json data
94 public static NormalizedNode<?, ?> parseJsonData(final String jsonData, final SchemaContext schemaContext)
96 final JSONCodecFactory jsonCodecFactory = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
97 .getShared(schemaContext);
98 final NormalizedNodeResult normalizedNodeResult = new NormalizedNodeResult();
99 final NormalizedNodeStreamWriter normalizedNodeStreamWriter = ImmutableNormalizedNodeStreamWriter
100 .from(normalizedNodeResult);
101 try (final JsonParserStream jsonParserStream = JsonParserStream
102 .create(normalizedNodeStreamWriter, jsonCodecFactory)) {
103 final JsonReader jsonReader = new JsonReader(new StringReader(jsonData));
104 jsonParserStream.parse(jsonReader);
106 return normalizedNodeResult.getResult();
110 * Break a Normalized Node tree into fragments that can be stored by the persistence service.
112 * @param tree the normalized node tree
113 * @param module the module applicable for the data in the normalized node
114 * @return the 'root' Fragment for the tree contain all relevant children etc.
116 public static Fragment fragmentNormalizedNode(
117 final NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?> tree,
118 final Module module) {
119 final QName nodeType = tree.getNodeType();
120 final Fragment rootFragment = Fragment.createRootFragment(module, nodeType);
121 fragmentNormalizedNode(rootFragment, tree);
125 private static void fragmentNormalizedNode(final Fragment currentFragment,
126 final NormalizedNode normalizedNode) {
127 if (normalizedNode instanceof DataContainerNode) {
128 inspectContainer(currentFragment, (DataContainerNode) normalizedNode);
129 } else if (normalizedNode instanceof MapNode) {
130 inspectKeyedList(currentFragment, (MapNode) normalizedNode);
131 } else if (normalizedNode instanceof ValueNode) {
132 inspectLeaf(currentFragment, (ValueNode) normalizedNode);
133 } else if (normalizedNode instanceof LeafSetNode) {
134 inspectLeafList(currentFragment, (LeafSetNode) normalizedNode);
136 LOGGER.warning("Cannot normalize " + normalizedNode.getClass());
140 private static void inspectLeaf(final Fragment currentFragment,
141 final ValueNode valueNode) {
142 final Object value = valueNode.getValue();
143 currentFragment.addLeafValue(valueNode.getNodeType().getLocalName(), value);
146 private static void inspectLeafList(final Fragment currentFragment,
147 final LeafSetNode leafSetNode) {
148 currentFragment.addLeafListName(leafSetNode.getNodeType().getLocalName());
149 for (final NormalizedNode value : (Collection<NormalizedNode>) leafSetNode.getValue()) {
150 fragmentNormalizedNode(currentFragment, value);
154 private static void inspectContainer(final Fragment currentFragment,
155 final DataContainerNode dataContainerNode) {
156 final Collection<NormalizedNode> leaves = (Collection) dataContainerNode.getValue();
157 for (final NormalizedNode leaf : leaves) {
158 fragmentNormalizedNode(currentFragment, leaf);
162 private static void inspectKeyedList(final Fragment currentFragment,
163 final MapNode mapNode) {
164 createNodeForEachListElement(currentFragment, mapNode);
167 private static void createNodeForEachListElement(final Fragment currentFragment, final MapNode mapNode) {
168 final Collection<MapEntryNode> mapEntryNodes = mapNode.getValue();
169 for (final MapEntryNode mapEntryNode : mapEntryNodes) {
170 final Fragment listElementFragment = currentFragment.createChildFragment(mapNode.getNodeType());
171 fragmentNormalizedNode(listElementFragment, mapEntryNode);