Bump upstream dependencies to Potassium GA
[transportpce.git] / networkmodel / src / test / java / org / opendaylight / transportpce / networkmodel / util / test / JsonUtil.java
1 /*
2  * Copyright © 2020 Orange Labs, Inc. and others.  All rights reserved.
3  *
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
7  */
8 package org.opendaylight.transportpce.networkmodel.util.test;
9
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.adapter.CurrentAdapterSerializer;
17 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
18 import org.opendaylight.mdsal.binding.dom.codec.impl.BindingCodecContext;
19 import org.opendaylight.mdsal.binding.runtime.api.BindingRuntimeContext;
20 import org.opendaylight.mdsal.binding.runtime.spi.BindingRuntimeHelpers;
21 import org.opendaylight.yangtools.yang.binding.DataObject;
22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
23 import org.opendaylight.yangtools.yang.binding.YangModelBindingProvider;
24 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
25 import org.opendaylight.yangtools.yang.common.QName;
26 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
27 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
28 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactorySupplier;
29 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
30 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
31 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizationResultHolder;
32 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
35
36 public final class JsonUtil {
37     private static final Logger LOG = LoggerFactory.getLogger(JsonUtil.class);
38     private static JsonUtil instance;
39
40     private EffectiveModelContext schemaCtx;
41     private BindingNormalizedNodeSerializer codecRegistry;
42
43     private JsonUtil() {
44         List<YangModuleInfo> moduleInfos = new LinkedList<>();
45         ServiceLoader<YangModelBindingProvider> yangProviderLoader = ServiceLoader.load(YangModelBindingProvider.class);
46         for (YangModelBindingProvider yangModelBindingProvider : yangProviderLoader) {
47             moduleInfos.add(yangModelBindingProvider.getModuleInfo());
48         }
49         /* Create the schema context for loaded models */
50         schemaCtx = BindingRuntimeHelpers.createEffectiveModel(moduleInfos);
51         if (schemaCtx == null) {
52             throw new IllegalStateException("Failed to load schema context");
53         }
54         // Create the binding binding normalized node codec registry
55         BindingRuntimeContext bindingContext = BindingRuntimeHelpers.createRuntimeContext();
56         codecRegistry = new CurrentAdapterSerializer(new BindingCodecContext(bindingContext));
57     }
58
59     public static JsonUtil getInstance() {
60         if (instance == null) {
61             instance = new JsonUtil();
62         }
63         return instance;
64     }
65
66     public DataObject getDataObjectFromJson(JsonReader reader, QName pathQname) {
67         NormalizationResultHolder resultHolder = new NormalizationResultHolder();
68         try (NormalizedNodeStreamWriter streamWriter = ImmutableNormalizedNodeStreamWriter.from(resultHolder);
69                 JsonParserStream jsonParser = JsonParserStream.create(streamWriter,
70                         JSONCodecFactorySupplier.RFC7951.getShared(schemaCtx));) {
71             jsonParser.parse(reader);
72             YangInstanceIdentifier yangId = YangInstanceIdentifier.of(pathQname);
73             Entry<InstanceIdentifier<?>, DataObject> entry =
74                 codecRegistry.fromNormalizedNode(yangId, resultHolder.getResult().data());
75             return entry == null ? null : entry.getValue();
76         } catch (IOException | IllegalArgumentException e) {
77             LOG.error("Cannot deserialize JSON ", e);
78             return null;
79         }
80     }
81 }