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 static com.google.common.base.Preconditions.checkArgument;
23 import static org.opendaylight.yangtools.yang.common.YangConstants.RFC6020_YANG_FILE_EXTENSION;
25 import com.google.common.base.Charsets;
26 import com.google.common.io.Files;
27 import com.google.gson.stream.JsonReader;
29 import java.io.IOException;
30 import java.io.StringReader;
31 import java.util.Collection;
32 import java.util.Collections;
33 import java.util.List;
34 import java.util.logging.Logger;
35 import java.util.stream.Collectors;
36 import org.onap.cps.api.impl.Fragment;
37 import org.onap.cps.yang.YangTextSchemaSourceSet;
38 import org.onap.cps.yang.YangTextSchemaSourceSetBuilder;
39 import org.opendaylight.yangtools.yang.common.QName;
40 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
41 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
42 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
43 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
44 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
45 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
46 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
47 import org.opendaylight.yangtools.yang.data.api.schema.ValueNode;
48 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
49 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
50 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
51 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
52 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
53 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
54 import org.opendaylight.yangtools.yang.model.api.Module;
55 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
56 import org.opendaylight.yangtools.yang.model.parser.api.YangParserException;
57 import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
59 public class YangUtils {
60 private static final Logger LOGGER = Logger.getLogger(YangUtils.class.getName());
63 throw new IllegalStateException("Utility class");
67 * Parse a file containing yang modules.
69 * @param yangModelFiles list of files containing one or more yang modules. The file has to have a .yang extension.
70 * @return a SchemaContext representing the yang model
71 * @throws IOException when the system as an IO issue
72 * @throws YangParserException when the file does not contain a valid yang structure
75 public static YangTextSchemaSourceSet parseYangModelFiles(final List<File> yangModelFiles)
76 throws IOException, YangParserException, ReactorException {
77 final YangTextSchemaSourceSetBuilder yangModelsMapBuilder = new YangTextSchemaSourceSetBuilder();
78 for (final File file :yangModelFiles) {
79 final String fileNameWithExtension = file.getName();
80 checkArgument(fileNameWithExtension.endsWith(RFC6020_YANG_FILE_EXTENSION),
81 "Filename %s does not end with '%s'", RFC6020_YANG_FILE_EXTENSION,
82 fileNameWithExtension);
83 final String content = Files.asCharSource(file, Charsets.UTF_8).read();
84 yangModelsMapBuilder.put(fileNameWithExtension, content);
86 return yangModelsMapBuilder.build();
90 * Parse a file containing json data for a certain model (schemaContext).
92 * @param jsonData a string containing json data for the given model
93 * @param schemaContext the SchemaContext for the given data
94 * @return the NormalizedNode representing the json data
96 public static NormalizedNode<?, ?> parseJsonData(final String jsonData, final SchemaContext schemaContext)
98 final JSONCodecFactory jsonCodecFactory = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
99 .getShared(schemaContext);
100 final NormalizedNodeResult normalizedNodeResult = new NormalizedNodeResult();
101 final NormalizedNodeStreamWriter normalizedNodeStreamWriter = ImmutableNormalizedNodeStreamWriter
102 .from(normalizedNodeResult);
103 try (final JsonParserStream jsonParserStream = JsonParserStream
104 .create(normalizedNodeStreamWriter, jsonCodecFactory)) {
105 final JsonReader jsonReader = new JsonReader(new StringReader(jsonData));
106 jsonParserStream.parse(jsonReader);
108 return normalizedNodeResult.getResult();
112 * Break a Normalized Node tree into fragments that can be stored by the persistence service.
114 * @param tree the normalized node tree
115 * @param module the module applicable for the data in the normalized node
116 * @return the 'root' Fragment for the tree contain all relevant children etc.
118 public static Fragment fragmentNormalizedNode(
119 final NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?> tree,
120 final Module module) {
121 final QName[] nodeTypes = {tree.getNodeType()};
122 final String xpath = buildXpathId(tree.getIdentifier());
123 final Fragment rootFragment = Fragment.createRootFragment(module, nodeTypes, xpath);
124 fragmentNormalizedNode(rootFragment, tree);
128 private static void fragmentNormalizedNode(final Fragment currentFragment,
129 final NormalizedNode normalizedNode) {
130 if (normalizedNode instanceof DataContainerNode) {
131 inspectContainer(currentFragment, (DataContainerNode) normalizedNode);
132 } else if (normalizedNode instanceof MapNode) {
133 inspectKeyedList(currentFragment, (MapNode) normalizedNode);
134 } else if (normalizedNode instanceof ValueNode) {
135 inspectLeaf(currentFragment, (ValueNode) normalizedNode);
136 } else if (normalizedNode instanceof LeafSetNode) {
137 inspectLeafList(currentFragment, (LeafSetNode) normalizedNode);
139 LOGGER.warning("Cannot normalize " + normalizedNode.getClass());
143 private static void inspectLeaf(final Fragment currentFragment,
144 final ValueNode valueNode) {
145 final Object value = valueNode.getValue();
146 currentFragment.addLeafValue(valueNode.getNodeType().getLocalName(), value);
149 private static void inspectLeafList(final Fragment currentFragment,
150 final LeafSetNode leafSetNode) {
151 currentFragment.addLeafListName(leafSetNode.getNodeType().getLocalName());
152 for (final NormalizedNode value : (Collection<NormalizedNode>) leafSetNode.getValue()) {
153 fragmentNormalizedNode(currentFragment, value);
157 private static void inspectContainer(final Fragment currentFragment,
158 final DataContainerNode dataContainerNode) {
159 final Collection<NormalizedNode> leaves = (Collection) dataContainerNode.getValue();
160 for (final NormalizedNode leaf : leaves) {
161 fragmentNormalizedNode(currentFragment, leaf);
165 private static void inspectKeyedList(final Fragment currentFragment,
166 final MapNode mapNode) {
167 createNodeForEachListElement(currentFragment, mapNode);
170 private static void createNodeForEachListElement(final Fragment currentFragment, final MapNode mapNode) {
171 final Collection<MapEntryNode> mapEntryNodes = mapNode.getValue();
172 for (final MapEntryNode mapEntryNode : mapEntryNodes) {
173 final String xpathId = buildXpathId(mapEntryNode.getIdentifier());
174 final Fragment listElementFragment =
175 currentFragment.createChildFragment(mapNode.getNodeType(), xpathId);
176 fragmentNormalizedNode(listElementFragment, mapEntryNode);
180 private static String buildXpathId(final YangInstanceIdentifier.PathArgument nodeIdentifier) {
181 final StringBuilder xpathIdBuilder = new StringBuilder();
182 xpathIdBuilder.append("/").append(nodeIdentifier.getNodeType().getLocalName());
184 if (nodeIdentifier instanceof NodeIdentifierWithPredicates) {
185 xpathIdBuilder.append(getKeyAttributesStatement((NodeIdentifierWithPredicates) nodeIdentifier));
187 return xpathIdBuilder.toString();
190 private static String getKeyAttributesStatement(final NodeIdentifierWithPredicates nodeIdentifier) {
191 final List<String> keyAttributes = nodeIdentifier.entrySet().stream().map(
193 final String name = entry.getKey().getLocalName();
194 final String value = String.valueOf(entry.getValue()).replace("'", "\\'");
195 return String.format("@%s='%s'", name, value);
197 ).collect(Collectors.toList());
199 if (keyAttributes.isEmpty()) {
202 Collections.sort(keyAttributes);
203 return "[" + String.join(" and ", keyAttributes) + "]";