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.controller.sal.rest.impl;
10 import static com.google.common.base.Preconditions.checkNotNull;
12 import com.google.common.base.Preconditions;
13 import com.google.gson.stream.JsonWriter;
14 import java.io.IOException;
16 import java.util.Collections;
17 import java.util.HashSet;
18 import java.util.List;
20 import javax.activation.UnsupportedDataTypeException;
21 import org.opendaylight.controller.sal.core.api.mount.MountInstance;
22 import org.opendaylight.controller.sal.restconf.impl.ControllerContext;
23 import org.opendaylight.controller.sal.restconf.impl.IdentityValuesDTO;
24 import org.opendaylight.controller.sal.restconf.impl.IdentityValuesDTO.IdentityValue;
25 import org.opendaylight.controller.sal.restconf.impl.IdentityValuesDTO.Predicate;
26 import org.opendaylight.controller.sal.restconf.impl.RestCodec;
27 import org.opendaylight.yangtools.yang.common.QName;
28 import org.opendaylight.yangtools.yang.data.api.CompositeNode;
29 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
30 import org.opendaylight.yangtools.yang.data.api.Node;
31 import org.opendaylight.yangtools.yang.data.api.SimpleNode;
32 import org.opendaylight.yangtools.yang.model.api.AnyXmlSchemaNode;
33 import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
34 import org.opendaylight.yangtools.yang.model.api.ChoiceNode;
35 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
36 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
37 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
38 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
39 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
40 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
41 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
42 import org.opendaylight.yangtools.yang.model.api.type.BooleanTypeDefinition;
43 import org.opendaylight.yangtools.yang.model.api.type.DecimalTypeDefinition;
44 import org.opendaylight.yangtools.yang.model.api.type.EmptyTypeDefinition;
45 import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
46 import org.opendaylight.yangtools.yang.model.api.type.InstanceIdentifierTypeDefinition;
47 import org.opendaylight.yangtools.yang.model.api.type.IntegerTypeDefinition;
48 import org.opendaylight.yangtools.yang.model.api.type.UnsignedIntegerTypeDefinition;
49 import org.slf4j.Logger;
50 import org.slf4j.LoggerFactory;
53 private static final Logger LOG = LoggerFactory.getLogger(JsonMapper.class);
54 private final MountInstance mountPoint;
56 public JsonMapper(final MountInstance mountPoint) {
57 this.mountPoint = mountPoint;
60 public void write(final JsonWriter writer, final CompositeNode data, final DataNodeContainer schema)
62 Preconditions.checkNotNull(writer);
63 Preconditions.checkNotNull(data);
64 Preconditions.checkNotNull(schema);
68 if (schema instanceof ContainerSchemaNode) {
69 writeContainer(writer, data, (ContainerSchemaNode) schema);
70 } else if (schema instanceof ListSchemaNode) {
71 writeList(writer, null, data, (ListSchemaNode) schema);
73 throw new UnsupportedDataTypeException(
74 "Schema can be ContainerSchemaNode or ListSchemaNode. Other types are not supported yet.");
80 private void writeChildrenOfParent(final JsonWriter writer, final CompositeNode parent,
81 final DataNodeContainer parentSchema) throws IOException {
84 final Set<QName> foundLists = new HashSet<>();
86 Set<DataSchemaNode> parentSchemaChildNodes = parentSchema == null ? Collections.<DataSchemaNode> emptySet()
87 : parentSchema.getChildNodes();
89 for (Node<?> child : parent.getValue()) {
90 DataSchemaNode childSchema = findFirstSchemaForNode(child, parentSchemaChildNodes);
92 if (childSchema == null) {
93 // Node may not conform to schema or allows "anyxml" - we'll process it.
95 LOG.debug("No schema found for data node \"{}\"", child.getNodeType());
97 if (!foundLists.contains(child.getNodeType())) {
98 handleNoSchemaFound(writer, child, parent);
100 // Since we don't have a schema, we don't know which nodes are supposed to be
101 // lists so treat every one as a potential list to avoid outputting duplicates.
103 foundLists.add(child.getNodeType());
105 } else if (childSchema instanceof ContainerSchemaNode) {
106 Preconditions.checkState(child instanceof CompositeNode,
107 "Data representation of Container should be CompositeNode - %s", child.getNodeType());
108 writeContainer(writer, (CompositeNode) child, (ContainerSchemaNode) childSchema);
109 } else if (childSchema instanceof ListSchemaNode) {
110 if (!foundLists.contains(child.getNodeType())) {
111 Preconditions.checkState(child instanceof CompositeNode,
112 "Data representation of List should be CompositeNode - %s", child.getNodeType());
113 foundLists.add(child.getNodeType());
114 writeList(writer, parent, (CompositeNode) child, (ListSchemaNode) childSchema);
116 } else if (childSchema instanceof LeafListSchemaNode) {
117 if (!foundLists.contains(child.getNodeType())) {
118 Preconditions.checkState(child instanceof SimpleNode<?>,
119 "Data representation of LeafList should be SimpleNode - %s", child.getNodeType());
120 foundLists.add(child.getNodeType());
121 writeLeafList(writer, parent, (SimpleNode<?>) child, (LeafListSchemaNode) childSchema);
123 } else if (childSchema instanceof LeafSchemaNode) {
124 Preconditions.checkState(child instanceof SimpleNode<?>,
125 "Data representation of LeafList should be SimpleNode - %s", child.getNodeType());
126 writeLeaf(writer, (SimpleNode<?>) child, (LeafSchemaNode) childSchema);
127 } else if (childSchema instanceof AnyXmlSchemaNode) {
128 if (child instanceof CompositeNode) {
129 writeContainer(writer, (CompositeNode) child, null);
131 handleNoSchemaFound(writer, child, parent);
134 throw new UnsupportedDataTypeException("Schema can be ContainerSchemaNode, ListSchemaNode, "
135 + "LeafListSchemaNode, or LeafSchemaNode. Other types are not supported yet.");
140 private static void writeValue(final JsonWriter writer, final Object value) throws IOException {
141 writer.value(value == null ? "" : String.valueOf(value));
144 private void handleNoSchemaFound(final JsonWriter writer, final Node<?> node, final CompositeNode parent)
146 if (node instanceof SimpleNode<?>) {
147 List<SimpleNode<?>> nodeLeafList = parent.getSimpleNodesByName(node.getNodeType());
148 if (nodeLeafList.size() == 1) {
149 writeName(node, null, writer);
150 writeValue(writer, node.getValue());
151 } else { // more than 1, write as a json array
152 writeName(node, null, writer);
154 for (SimpleNode<?> leafNode : nodeLeafList) {
155 writeValue(writer, leafNode.getValue());
160 } else { // CompositeNode
161 Preconditions.checkState(node instanceof CompositeNode,
162 "Data representation of Container should be CompositeNode - %s", node.getNodeType());
164 List<CompositeNode> nodeList = parent.getCompositesByName(node.getNodeType());
165 if (nodeList.size() == 1) {
166 writeContainer(writer, (CompositeNode) node, null);
167 } else { // more than 1, write as a json array
168 writeList(writer, parent, (CompositeNode) node, null);
173 private static DataSchemaNode findFirstSchemaForNode(final Node<?> node, final Set<DataSchemaNode> dataSchemaNode) {
174 for (DataSchemaNode dsn : dataSchemaNode) {
175 if (node.getNodeType().equals(dsn.getQName())) {
178 if (dsn instanceof ChoiceNode) {
179 for (ChoiceCaseNode choiceCase : ((ChoiceNode) dsn).getCases()) {
180 DataSchemaNode foundDsn = findFirstSchemaForNode(node, choiceCase.getChildNodes());
181 if (foundDsn != null) {
190 private void writeContainer(final JsonWriter writer, final CompositeNode node, final ContainerSchemaNode schema)
192 writeName(node, schema, writer);
193 writer.beginObject();
194 writeChildrenOfParent(writer, node, schema);
198 private void writeList(final JsonWriter writer, final CompositeNode nodeParent, final CompositeNode node,
199 final ListSchemaNode schema) throws IOException {
200 writeName(node, schema, writer);
203 if (nodeParent != null) {
204 List<CompositeNode> nodeLists = nodeParent.getCompositesByName(node.getNodeType());
205 for (CompositeNode nodeList : nodeLists) {
206 writer.beginObject();
207 writeChildrenOfParent(writer, nodeList, schema);
211 writer.beginObject();
212 writeChildrenOfParent(writer, node, schema);
219 private void writeLeafList(final JsonWriter writer, final CompositeNode nodeParent, final SimpleNode<?> node,
220 final LeafListSchemaNode schema) throws IOException {
221 writeName(node, schema, writer);
224 List<SimpleNode<?>> nodeLeafLists = nodeParent.getSimpleNodesByName(node.getNodeType());
225 for (SimpleNode<?> nodeLeafList : nodeLeafLists) {
226 writeValueOfNodeByType(writer, nodeLeafList, schema.getType(), schema);
231 private void writeLeaf(final JsonWriter writer, final SimpleNode<?> node, final LeafSchemaNode schema)
233 writeName(node, schema, writer);
234 writeValueOfNodeByType(writer, node, schema.getType(), schema);
237 private void writeValueOfNodeByType(final JsonWriter writer, final SimpleNode<?> node,
238 final TypeDefinition<?> type, final DataSchemaNode schema) throws IOException {
240 TypeDefinition<?> baseType = RestUtil.resolveBaseTypeFrom(type);
242 if (node.getValue() == null && !(baseType instanceof EmptyTypeDefinition)) {
243 LOG.debug("While generationg JSON output null value was found for type {}.", baseType.getClass()
247 if (baseType instanceof IdentityrefTypeDefinition) {
248 if (node.getValue() instanceof QName) {
249 IdentityValuesDTO valueDTO = (IdentityValuesDTO) RestCodec.from(baseType, mountPoint).serialize(
251 IdentityValue valueFromDTO = valueDTO.getValuesWithNamespaces().get(0);
253 if (mountPoint != null) {
254 moduleName = ControllerContext.getInstance().findModuleNameByNamespace(mountPoint,
255 URI.create(valueFromDTO.getNamespace()));
257 moduleName = ControllerContext.getInstance().findModuleNameByNamespace(
258 URI.create(valueFromDTO.getNamespace()));
260 writer.value(moduleName + ":" + valueFromDTO.getValue());
262 writeStringRepresentation(writer, node, baseType, QName.class);
264 } else if (baseType instanceof InstanceIdentifierTypeDefinition) {
265 if (node.getValue() instanceof InstanceIdentifier) {
266 IdentityValuesDTO valueDTO = (IdentityValuesDTO) RestCodec.from(baseType, mountPoint).serialize(
268 writeIdentityValuesDTOToJson(writer, valueDTO);
270 writeStringRepresentation(writer, node, baseType, InstanceIdentifier.class);
272 } else if (baseType instanceof DecimalTypeDefinition || baseType instanceof IntegerTypeDefinition
273 || baseType instanceof UnsignedIntegerTypeDefinition) {
274 writer.value(new NumberForJsonWriter((String) RestCodec.from(baseType, mountPoint).serialize(
276 } else if (baseType instanceof BooleanTypeDefinition) {
277 writer.value(Boolean.parseBoolean((String) RestCodec.from(baseType, mountPoint).serialize(node.getValue())));
278 } else if (baseType instanceof EmptyTypeDefinition) {
279 writeEmptyDataTypeToJson(writer);
281 String value = String.valueOf(RestCodec.from(baseType, mountPoint).serialize(node.getValue()));
283 value = String.valueOf(node.getValue());
285 writer.value(value.equals("null") ? "" : value);
289 private static void writeIdentityValuesDTOToJson(final JsonWriter writer, final IdentityValuesDTO valueDTO)
291 StringBuilder result = new StringBuilder();
292 for (IdentityValue identityValue : valueDTO.getValuesWithNamespaces()) {
295 writeModuleNameAndIdentifier(result, identityValue);
296 if (identityValue.getPredicates() != null && !identityValue.getPredicates().isEmpty()) {
297 for (Predicate predicate : identityValue.getPredicates()) {
298 IdentityValue identityValuePredicate = predicate.getName();
300 if (identityValuePredicate == null) {
303 writeModuleNameAndIdentifier(result, identityValuePredicate);
306 result.append(predicate.getValue());
312 writer.value(result.toString());
315 private static void writeModuleNameAndIdentifier(final StringBuilder result, final IdentityValue identityValue) {
316 String moduleName = ControllerContext.getInstance().findModuleNameByNamespace(
317 URI.create(identityValue.getNamespace()));
318 if (moduleName != null && !moduleName.isEmpty()) {
319 result.append(moduleName);
322 result.append(identityValue.getValue());
325 private static void writeStringRepresentation(final JsonWriter writer, final SimpleNode<?> node,
326 final TypeDefinition<?> baseType, final Class<?> requiredType) throws IOException {
327 Object value = node.getValue();
328 LOG.debug("Value of {}:{} is not instance of {} but is {}", baseType.getQName().getNamespace(), baseType
329 .getQName().getLocalName(), requiredType.getClass(), node.getValue().getClass());
333 writer.value(String.valueOf(value));
337 private void writeEmptyDataTypeToJson(final JsonWriter writer) throws IOException {
343 private void writeName(final Node<?> node, final DataSchemaNode schema, final JsonWriter writer) throws IOException {
344 String nameForOutput = node.getNodeType().getLocalName();
345 if (schema != null && schema.isAugmenting()) {
346 ControllerContext contContext = ControllerContext.getInstance();
347 CharSequence moduleName = null;
348 if (mountPoint == null) {
349 moduleName = contContext.toRestconfIdentifier(schema.getQName());
351 moduleName = contContext.toRestconfIdentifier(mountPoint, schema.getQName());
353 if (moduleName != null) {
354 nameForOutput = moduleName.toString();
356 LOG.info("Module '{}' was not found in schema from mount point", schema.getQName());
359 writer.name(nameForOutput);
362 private static final class NumberForJsonWriter extends Number {
364 private static final long serialVersionUID = -3147729419814417666L;
365 private final String value;
367 public NumberForJsonWriter(final String value) {
372 public int intValue() {
373 throw new IllegalStateException("Should not be invoked");
377 public long longValue() {
378 throw new IllegalStateException("Should not be invoked");
382 public float floatValue() {
383 throw new IllegalStateException("Should not be invoked");
387 public double doubleValue() {
388 throw new IllegalStateException("Should not be invoked");
392 public String toString() {