2 * Copyright (c) 2014 Cisco Systems, 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.netconf.sal.rest.impl;
10 import com.google.common.base.Optional;
11 import com.google.gson.stream.JsonWriter;
12 import java.io.IOException;
13 import java.io.OutputStream;
14 import java.io.OutputStreamWriter;
15 import java.lang.annotation.Annotation;
16 import java.lang.reflect.Type;
18 import java.nio.charset.StandardCharsets;
19 import java.util.Map.Entry;
20 import javax.ws.rs.Produces;
21 import javax.ws.rs.WebApplicationException;
22 import javax.ws.rs.core.MediaType;
23 import javax.ws.rs.core.MultivaluedMap;
24 import javax.ws.rs.ext.MessageBodyWriter;
25 import javax.ws.rs.ext.Provider;
26 import org.opendaylight.netconf.sal.rest.api.Draft02;
27 import org.opendaylight.netconf.sal.rest.api.RestconfNormalizedNodeWriter;
28 import org.opendaylight.netconf.sal.rest.api.RestconfService;
29 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
30 import org.opendaylight.restconf.common.context.NormalizedNodeContext;
31 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
32 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
33 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
34 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
35 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
36 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
37 import org.opendaylight.yangtools.yang.data.codec.gson.JSONCodecFactory;
38 import org.opendaylight.yangtools.yang.data.codec.gson.JSONNormalizedNodeStreamWriter;
39 import org.opendaylight.yangtools.yang.data.codec.gson.JsonWriterFactory;
40 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
41 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
42 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
43 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
44 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
45 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
48 * Normalized node writer for JSON.
50 * @deprecated This class will be replaced by NormalizedNodeJsonBodyWriter from restconf-nb-rfc8040
54 @Produces({ Draft02.MediaTypes.API + RestconfService.JSON, Draft02.MediaTypes.DATA + RestconfService.JSON,
55 Draft02.MediaTypes.OPERATION + RestconfService.JSON, MediaType.APPLICATION_JSON })
56 public class NormalizedNodeJsonBodyWriter implements MessageBodyWriter<NormalizedNodeContext> {
58 private static final int DEFAULT_INDENT_SPACES_NUM = 2;
61 public boolean isWriteable(final Class<?> type, final Type genericType, final Annotation[] annotations,
62 final MediaType mediaType) {
63 return type.equals(NormalizedNodeContext.class);
67 public long getSize(final NormalizedNodeContext context, final Class<?> type, final Type genericType,
68 final Annotation[] annotations, final MediaType mediaType) {
73 public void writeTo(final NormalizedNodeContext context, final Class<?> type, final Type genericType,
74 final Annotation[] annotations, final MediaType mediaType, final MultivaluedMap<String, Object> httpHeaders,
75 final OutputStream entityStream) throws IOException, WebApplicationException {
76 for (final Entry<String, Object> entry : context.getNewHeaders().entrySet()) {
77 httpHeaders.add(entry.getKey(), entry.getValue());
79 final NormalizedNode<?, ?> data = context.getData();
84 @SuppressWarnings("unchecked")
85 final InstanceIdentifierContext<SchemaNode> identifierCtx =
86 (InstanceIdentifierContext<SchemaNode>) context.getInstanceIdentifierContext();
88 final SchemaPath path = identifierCtx.getSchemaNode().getPath();
89 final JsonWriter jsonWriter = createJsonWriter(entityStream, context.getWriterParameters().isPrettyPrint());
90 jsonWriter.beginObject();
92 jsonWriter,path,identifierCtx,data, Optional.fromNullable(context.getWriterParameters().getDepth()));
93 jsonWriter.endObject();
97 private static void writeNormalizedNode(final JsonWriter jsonWriter, SchemaPath path,
98 final InstanceIdentifierContext<SchemaNode> context, NormalizedNode<?, ?> data,
99 final Optional<Integer> depth) throws IOException {
100 final RestconfNormalizedNodeWriter nnWriter;
101 if (SchemaPath.ROOT.equals(path)) {
103 * Creates writer without initialNs and we write children of root data container
104 * which is not visible in restconf
106 nnWriter = createNormalizedNodeWriter(context,path,jsonWriter, depth);
107 writeChildren(nnWriter,(ContainerNode) data);
108 } else if (context.getSchemaNode() instanceof RpcDefinition) {
110 * RpcDefinition is not supported as initial codec in JSONStreamWriter,
111 * so we need to emit initial output declaratation..
113 path = ((RpcDefinition) context.getSchemaNode()).getOutput().getPath();
114 nnWriter = createNormalizedNodeWriter(context,path,jsonWriter, depth);
115 jsonWriter.name("output");
116 jsonWriter.beginObject();
117 writeChildren(nnWriter, (ContainerNode) data);
118 jsonWriter.endObject();
120 path = path.getParent();
122 if (data instanceof MapEntryNode) {
123 data = ImmutableNodes.mapNodeBuilder(data.getNodeType()).withChild((MapEntryNode) data).build();
125 nnWriter = createNormalizedNodeWriter(context,path,jsonWriter, depth);
126 nnWriter.write(data);
131 private static void writeChildren(final RestconfNormalizedNodeWriter nnWriter, final ContainerNode data)
133 for (final DataContainerChild<? extends PathArgument, ?> child : data.getValue()) {
134 nnWriter.write(child);
138 private static RestconfNormalizedNodeWriter createNormalizedNodeWriter(
139 final InstanceIdentifierContext<SchemaNode> context, final SchemaPath path, final JsonWriter jsonWriter,
140 final Optional<Integer> depth) {
142 final SchemaNode schema = context.getSchemaNode();
143 final JSONCodecFactory codecs = getCodecFactory(context);
146 if (schema instanceof DataSchemaNode && !((DataSchemaNode)schema).isAugmenting()
147 && !(schema instanceof SchemaContext)) {
148 initialNs = schema.getQName().getNamespace();
149 } else if (schema instanceof RpcDefinition) {
150 initialNs = schema.getQName().getNamespace();
154 final NormalizedNodeStreamWriter streamWriter =
155 JSONNormalizedNodeStreamWriter.createNestedWriter(codecs, path, initialNs, jsonWriter);
156 if (depth.isPresent()) {
157 return DepthAwareNormalizedNodeWriter.forStreamWriter(streamWriter, depth.get());
160 return RestconfDelegatingNormalizedNodeWriter.forStreamWriter(streamWriter);
163 private static JsonWriter createJsonWriter(final OutputStream entityStream, final boolean prettyPrint) {
165 return JsonWriterFactory.createJsonWriter(new OutputStreamWriter(entityStream, StandardCharsets.UTF_8),
166 DEFAULT_INDENT_SPACES_NUM);
169 return JsonWriterFactory.createJsonWriter(new OutputStreamWriter(entityStream, StandardCharsets.UTF_8));
172 private static JSONCodecFactory getCodecFactory(final InstanceIdentifierContext<?> context) {
173 // TODO: Performance: Cache JSON Codec factory and schema context
174 return JSONCodecFactory.getShared(context.getSchemaContext());