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.Iterator;
27 import java.util.ServiceLoader;
28 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
29 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
30 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
31 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
32 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
33 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
34 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
35 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
36 import org.opendaylight.yangtools.yang.model.parser.api.YangParser;
37 import org.opendaylight.yangtools.yang.model.parser.api.YangParserException;
38 import org.opendaylight.yangtools.yang.model.parser.api.YangParserFactory;
39 import org.opendaylight.yangtools.yang.model.repo.api.StatementParserMode;
40 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
42 public class YangUtils {
44 private static final YangParserFactory PARSER_FACTORY;
47 throw new IllegalStateException("Utility class");
51 final Iterator<YangParserFactory> it = ServiceLoader.load(YangParserFactory.class).iterator();
53 throw new IllegalStateException("No YangParserFactory found");
55 PARSER_FACTORY = it.next();
59 * Parse a file containing yang modules.
60 * @param yangModelFile a file containing one or more yang modules
61 * (please note the file has to have a .yang extension if not an exception will be thrown)
62 * @return a SchemaContext representing the yang model
63 * @throws IOException when the system as an IO issue
64 * @throws YangParserException when the file does not contain a valid yang structure
66 public static SchemaContext parseYangModelFile(final File yangModelFile) throws IOException, YangParserException {
67 YangTextSchemaSource yangTextSchemaSource = YangTextSchemaSource.forFile(yangModelFile);
68 final YangParser yangParser = PARSER_FACTORY
69 .createParser(StatementParserMode.DEFAULT_MODE);
70 yangParser.addSource(yangTextSchemaSource);
71 return yangParser.buildEffectiveModel();
75 * Parse a file containing json data for a certain model (schemaContext).
76 * @param jsonData a string containing json data for the given model
77 * @param schemaContext the SchemaContext for the given data
78 * @return the NormalizedNode representing the json data
80 public static NormalizedNode<?, ?> parseJsonData(final String jsonData, final SchemaContext schemaContext)
82 JSONCodecFactory jsonCodecFactory = JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02
83 .getShared(schemaContext);
84 final NormalizedNodeResult normalizedNodeResult = new NormalizedNodeResult();
85 final NormalizedNodeStreamWriter normalizedNodeStreamWriter = ImmutableNormalizedNodeStreamWriter
86 .from(normalizedNodeResult);
87 try (JsonParserStream jsonParserStream = JsonParserStream
88 .create(normalizedNodeStreamWriter, jsonCodecFactory)) {
89 final JsonReader jsonReader = new JsonReader(new StringReader(jsonData));
90 jsonParserStream.parse(jsonReader);
92 return normalizedNodeResult.getResult();
95 public static void chopNormalizedNode(NormalizedNode<?, ?> tree) {
96 //TODO Toine Siebelink, add code from proto-type (other user story)