2 * Copyright © 2016 AT&T 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.common.converter;
10 import com.google.gson.stream.JsonReader;
11 import com.google.gson.stream.JsonWriter;
12 import java.io.IOException;
13 import java.io.InputStream;
14 import java.io.InputStreamReader;
15 import java.io.Reader;
16 import java.io.StringWriter;
17 import java.io.Writer;
18 import java.nio.charset.StandardCharsets;
19 import java.util.Optional;
20 import javax.annotation.Nonnull;
21 import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
22 import org.opendaylight.transportpce.common.DataStoreContext;
23 import org.opendaylight.transportpce.common.converter.api.DataObjectConverter;
24 import org.opendaylight.yangtools.yang.binding.DataObject;
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.NormalizedNode;
28 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
29 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
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.JSONNormalizedNodeStreamWriter;
33 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
34 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
35 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
36 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
37 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
38 import org.slf4j.Logger;
39 import org.slf4j.LoggerFactory;
41 public final class JSONDataObjectConverter extends AbstractDataObjectConverter {
43 private static final Logger LOG = LoggerFactory.getLogger(JSONDataObjectConverter.class);
45 private JSONDataObjectConverter(EffectiveModelContext schemaContext,
46 BindingNormalizedNodeSerializer codecRegistry) {
47 super(schemaContext, codecRegistry);
51 * extracts codec and schema context (?).
53 * @param dataStoreContextUtil datastore context util used to extract codec and schema context
54 * @return {@link AbstractDataObjectConverter}
56 public static DataObjectConverter createWithDataStoreUtil(@Nonnull DataStoreContext dataStoreContextUtil) {
57 return new JSONDataObjectConverter(dataStoreContextUtil.getSchemaContext(),
58 dataStoreContextUtil.getBindingToNormalizedNodeCodec());
62 * extracts codec and schema context (?).
64 * @param schemaContext schema context for converter
65 * @param codecRegistry codec registry used for converting
68 public static DataObjectConverter createWithSchemaContext(@Nonnull EffectiveModelContext schemaContext,
69 @Nonnull BindingNormalizedNodeSerializer codecRegistry) {
70 return new JSONDataObjectConverter(schemaContext, codecRegistry);
74 * Transforms the JSON input stream into normalized nodes.
76 * @param inputStream of the given JSON
77 * @return {@link Optional} instance of {@link NormalizedNode}.
80 public Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> transformIntoNormalizedNode(
81 @Nonnull InputStream inputStream) {
82 JsonReader reader = new JsonReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
83 return parseInputJSON(reader);
87 public Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> transformIntoNormalizedNode(
88 @Nonnull Reader inputReader, SchemaNode parentSchema) {
89 throw new UnsupportedOperationException("Not Implemented yet");
93 public Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> transformIntoNormalizedNode(
94 @Nonnull Reader inputReader) {
95 JsonReader reader = new JsonReader(inputReader);
96 return parseInputJSON(reader);
100 public <T extends DataObject> Writer writerFromDataObject(@Nonnull DataObject object, Class<T> dataObjectClass,
101 ConvertType<T> convertType) {
102 Writer writer = new StringWriter();
103 JsonWriter jsonWriter = new JsonWriter(writer);
104 JSONCodecFactory jsonCodecFactory =
105 JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02.createLazy(getSchemaContext());
106 NormalizedNodeStreamWriter create =
107 JSONNormalizedNodeStreamWriter.createExclusiveWriter(jsonCodecFactory,
108 (org.opendaylight.yangtools.yang.model.api.DataNodeContainer)null, null, jsonWriter);
110 try (NormalizedNodeWriter normalizedNodeWriter = NormalizedNodeWriter.forStreamWriter(create);) {
112 .write(convertType.toNormalizedNodes(dataObjectClass.cast(object), dataObjectClass).get());
113 } catch (IOException ioe) {
114 throw new IllegalStateException(ioe);
120 public <T extends DataObject> Writer writerFromRpcDataObject(@Nonnull DataObject object, Class<T> dataObjectClass,
121 ConvertType<T> convertType, QName rpcOutputQName, String rpcName) {
126 * Parses the input json with concrete implementation of {@link JsonParserStream}.
128 * @param reader of the given JSON
131 private Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> parseInputJSON(
133 NormalizedNodeResult result = new NormalizedNodeResult();
134 try (NormalizedNodeStreamWriter streamWriter = ImmutableNormalizedNodeStreamWriter.from(result);
135 JsonParserStream jsonParser = JsonParserStream.create(streamWriter,
136 JSONCodecFactorySupplier.DRAFT_LHOTKA_NETMOD_YANG_JSON_02.getShared(getSchemaContext()),
137 getSchemaContext())) {
138 jsonParser.parse(reader);
139 } catch (IOException e) {
140 LOG.warn("An error occured during parsing Json input stream", e);
141 return Optional.empty();
143 return Optional.ofNullable(result.getResult());