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.binding.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.util.Optional;
19 import javax.annotation.Nonnull;
20 import org.opendaylight.transportpce.binding.converter.api.DataObjectConverter;
21 import org.opendaylight.transportpce.test.common.DataStoreContext;
22 import org.opendaylight.yangtools.binding.data.codec.impl.BindingNormalizedNodeCodecRegistry;
23 import org.opendaylight.yangtools.yang.binding.DataObject;
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.NormalizedNode;
27 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
28 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter;
29 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
30 import org.opendaylight.yangtools.yang.data.codec.gson.JSONNormalizedNodeStreamWriter;
31 import org.opendaylight.yangtools.yang.data.codec.gson.JsonParserStream;
32 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNormalizedNodeStreamWriter;
33 import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;
34 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
35 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
36 import org.slf4j.Logger;
37 import org.slf4j.LoggerFactory;
39 public class JSONDataObjectConverter extends AbstractDataObjectConverter {
41 private static final Logger LOG = LoggerFactory.getLogger(JSONDataObjectConverter.class);
43 private JSONDataObjectConverter(SchemaContext schemaContext, BindingNormalizedNodeCodecRegistry codecRegistry) {
44 super(schemaContext, codecRegistry);
48 * extracts codec and schema context (?).
50 * @param dataStoreContextUtil datastore context util used to extract codec and schema context
51 * @return {@link AbstractDataObjectConverter}
53 public static DataObjectConverter createWithDataStoreUtil(@Nonnull DataStoreContext dataStoreContextUtil) {
54 return new JSONDataObjectConverter(dataStoreContextUtil.getSchemaContext(),
55 dataStoreContextUtil.getBindingToNormalizedNodeCodec());
59 * extracts codec and schema context (?).
61 * @param schemaContext schema context for converter
62 * @param codecRegistry codec registry used for converting
65 public static DataObjectConverter createWithSchemaContext(@Nonnull SchemaContext schemaContext,
66 @Nonnull BindingNormalizedNodeCodecRegistry codecRegistry) {
67 return new JSONDataObjectConverter(schemaContext, codecRegistry);
71 * Transforms the JSON input stream into normalized nodes.
73 * @param inputStream of the given JSON
74 * @return {@link Optional} instance of {@link NormalizedNode}.
77 public Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> transformIntoNormalizedNode(
78 @Nonnull InputStream inputStream) {
80 JsonReader reader = new JsonReader(new InputStreamReader(inputStream, "UTF-8"));
81 return parseInputJSON(reader);
82 } catch (IOException e) {
83 LOG.warn(e.getMessage(), e);
84 return Optional.empty();
89 public Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> transformIntoNormalizedNode(
90 @Nonnull Reader inputReader, SchemaNode parentSchema) {
91 throw new UnsupportedOperationException("Not Implemented yet");
95 public Optional<NormalizedNode<? extends YangInstanceIdentifier.PathArgument, ?>> transformIntoNormalizedNode(
96 @Nonnull Reader inputReader) {
97 JsonReader reader = new JsonReader(inputReader);
98 return parseInputJSON(reader);
102 public <T extends DataObject> Writer writerFromDataObject(@Nonnull DataObject object, Class<T> dataObjectClass,
103 ConvertType<T> convertType) {
104 Writer writer = new StringWriter();
105 JsonWriter jsonWriter = new JsonWriter(writer);
106 JSONCodecFactory jsonCodecFactory = JSONCodecFactory.createLazy(getSchemaContext());
107 NormalizedNodeStreamWriter create =
108 JSONNormalizedNodeStreamWriter.createExclusiveWriter(jsonCodecFactory, 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, getSchemaContext(),
136 getSchemaContext())) {
137 jsonParser.parse(reader);
138 } catch (IOException e) {
139 LOG.warn("An error {} occured during parsing Json input stream", e.getMessage(), e);
140 return Optional.empty();
142 return Optional.ofNullable(result.getResult());