2 * Copyright © 2020 Orange Labs, 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.transportpce.pce.utils;
10 import com.google.gson.stream.JsonReader;
11 import java.io.IOException;
12 import java.util.LinkedList;
13 import java.util.List;
14 import java.util.Map.Entry;
15 import java.util.ServiceLoader;
16 import org.opendaylight.mdsal.binding.dom.codec.impl.BindingCodecContext;
17 import org.opendaylight.mdsal.binding.dom.codec.spi.BindingDOMCodecServices;
18 import org.opendaylight.mdsal.binding.runtime.api.BindingRuntimeContext;
19 import org.opendaylight.mdsal.binding.runtime.spi.BindingRuntimeHelpers;
20 import org.opendaylight.yangtools.yang.binding.DataObject;
21 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
22 import org.opendaylight.yangtools.yang.binding.YangModelBindingProvider;
23 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
24 import org.opendaylight.yangtools.yang.common.QName;
25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
26 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
27 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
28 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
29 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
30 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizationResultHolder;
31 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
36 public final class JsonUtil {
37 private static final Logger LOG = LoggerFactory.getLogger(JsonUtil.class);
38 private static JsonUtil instance;
40 private EffectiveModelContext schemaCtx;
41 private BindingDOMCodecServices bindingDOMCodecServices;
44 List<YangModuleInfo> moduleInfos = new LinkedList<>();
45 ServiceLoader<YangModelBindingProvider> yangProviderLoader = ServiceLoader.load(YangModelBindingProvider.class);
46 for (YangModelBindingProvider yangModelBindingProvider : yangProviderLoader) {
47 moduleInfos.add(yangModelBindingProvider.getModuleInfo());
49 /* Create the schema context for loaded models */
50 this.schemaCtx = BindingRuntimeHelpers.createEffectiveModel(moduleInfos);
51 BindingRuntimeContext bindingContext = BindingRuntimeHelpers.createRuntimeContext();
52 bindingDOMCodecServices = new BindingCodecContext(bindingContext);
55 public static JsonUtil getInstance() {
56 if (instance == null) {
57 instance = new JsonUtil();
62 public DataObject getDataObjectFromJson(JsonReader reader, QName pathQname) {
63 NormalizationResultHolder resultHolder = new NormalizationResultHolder();
64 try (NormalizedNodeStreamWriter streamWriter = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
65 JsonParserStream jsonParser = JsonParserStream.create(streamWriter,
66 JSONCodecFactorySupplier.RFC7951.getShared(schemaCtx));) {
67 jsonParser.parse(reader);
68 YangInstanceIdentifier yangId = YangInstanceIdentifier.of(pathQname);
69 Entry<InstanceIdentifier<?>, DataObject> entry =
70 bindingDOMCodecServices.fromNormalizedNode(yangId, resultHolder.getResult().data());
71 return entry == null ? null : entry.getValue();
72 } catch (IOException | IllegalArgumentException e) {
73 LOG.error("Cannot deserialize JSON ", e);
78 public BindingDOMCodecServices getBindingDOMCodecServices() {
79 return bindingDOMCodecServices;