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.doc.impl;
10 import static org.opendaylight.netconf.sal.rest.doc.util.RestDocgenUtil.resolveNodesName;
11 import com.google.common.base.Preconditions;
12 import java.io.IOException;
13 import java.util.ArrayList;
14 import java.util.List;
16 import javax.annotation.concurrent.NotThreadSafe;
17 import org.json.JSONArray;
18 import org.json.JSONException;
19 import org.json.JSONObject;
20 import org.opendaylight.netconf.sal.rest.doc.model.builder.OperationBuilder;
21 import org.opendaylight.netconf.sal.rest.doc.model.builder.OperationBuilder.Post;
22 import org.opendaylight.yangtools.yang.common.QName;
23 import org.opendaylight.yangtools.yang.model.api.AnyXmlSchemaNode;
24 import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
25 import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
26 import org.opendaylight.yangtools.yang.model.api.ConstraintDefinition;
27 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
28 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
29 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
30 import org.opendaylight.yangtools.yang.model.api.IdentitySchemaNode;
31 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
32 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
33 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
34 import org.opendaylight.yangtools.yang.model.api.Module;
35 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
36 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
37 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
38 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
39 import org.opendaylight.yangtools.yang.model.api.type.BinaryTypeDefinition;
40 import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition;
41 import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition.Bit;
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.EnumTypeDefinition;
45 import org.opendaylight.yangtools.yang.model.api.type.EnumTypeDefinition.EnumPair;
46 import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
47 import org.opendaylight.yangtools.yang.model.api.type.IntegerTypeDefinition;
48 import org.opendaylight.yangtools.yang.model.api.type.LengthConstraint;
49 import org.opendaylight.yangtools.yang.model.api.type.StringTypeDefinition;
50 import org.opendaylight.yangtools.yang.model.api.type.UnionTypeDefinition;
51 import org.opendaylight.yangtools.yang.model.api.type.UnsignedIntegerTypeDefinition;
52 import org.opendaylight.yangtools.yang.model.util.ExtendedType;
53 import org.slf4j.Logger;
54 import org.slf4j.LoggerFactory;
57 * Generates JSON Schema for data defined in YANG.
60 public class ModelGenerator {
62 private static final Logger LOG = LoggerFactory.getLogger(ModelGenerator.class);
64 private static final String BASE_64 = "base64";
65 private static final String BINARY_ENCODING_KEY = "binaryEncoding";
66 private static final String MEDIA_KEY = "media";
67 private static final String ONE_OF_KEY = "oneOf";
68 private static final String UNIQUE_ITEMS_KEY = "uniqueItems";
69 private static final String MAX_ITEMS = "maxItems";
70 private static final String MIN_ITEMS = "minItems";
71 private static final String SCHEMA_URL = "http://json-schema.org/draft-04/schema";
72 private static final String SCHEMA_KEY = "$schema";
73 private static final String MAX_LENGTH_KEY = "maxLength";
74 private static final String MIN_LENGTH_KEY = "minLength";
75 private static final String REQUIRED_KEY = "required";
76 private static final String REF_KEY = "$ref";
77 private static final String ITEMS_KEY = "items";
78 private static final String TYPE_KEY = "type";
79 private static final String PROPERTIES_KEY = "properties";
80 private static final String DESCRIPTION_KEY = "description";
81 private static final String OBJECT_TYPE = "object";
82 private static final String ARRAY_TYPE = "array";
83 private static final String ENUM = "enum";
84 private static final String INTEGER = "integer";
85 private static final String NUMBER = "number";
86 private static final String BOOLEAN = "boolean";
87 private static final String STRING = "string";
88 private static final String ID_KEY = "id";
89 private static final String SUB_TYPES_KEY = "subTypes";
91 private Module topLevelModule;
93 public ModelGenerator() {
96 private static String jsonTypeFor(final TypeDefinition<?> type) {
97 if (type instanceof BooleanTypeDefinition) {
99 } else if (type instanceof DecimalTypeDefinition) {
101 } else if (type instanceof EnumTypeDefinition) {
103 } else if (type instanceof IntegerTypeDefinition) {
105 } else if (type instanceof UnsignedIntegerTypeDefinition) {
107 } else if (type instanceof StringTypeDefinition) {
115 public JSONObject convertToJsonSchema(final Module module, final SchemaContext schemaContext) throws IOException, JSONException {
116 JSONObject models = new JSONObject();
117 topLevelModule = module;
118 processModules(module, models);
119 processContainersAndLists(module, models, schemaContext);
120 processRPCs(module, models, schemaContext);
121 processIdentities(module, models);
125 private void processModules(final Module module, final JSONObject models) throws JSONException {
126 createConcreteModelForPost(models, module.getName() + BaseYangSwaggerGenerator.MODULE_NAME_SUFFIX, createPropertiesForPost(module));
129 private void processContainersAndLists(final Module module, final JSONObject models, final SchemaContext schemaContext)
130 throws IOException, JSONException {
132 String moduleName = module.getName();
134 for (DataSchemaNode childNode : module.getChildNodes()) {
135 // For every container and list in the module
136 if (childNode instanceof ContainerSchemaNode || childNode instanceof ListSchemaNode) {
137 processDataNodeContainer((DataNodeContainer) childNode, moduleName, models, true, schemaContext);
138 processDataNodeContainer((DataNodeContainer) childNode, moduleName, models, false, schemaContext);
145 * Process the RPCs for a Module Spits out a file each of the name <rpcName>-input.json and <rpcName>-output.json
146 * for each RPC that contains input & output elements
149 * @throws JSONException
150 * @throws IOException
152 private void processRPCs(final Module module, final JSONObject models, final SchemaContext schemaContext) throws JSONException,
155 Set<RpcDefinition> rpcs = module.getRpcs();
156 String moduleName = module.getName();
157 for (RpcDefinition rpc : rpcs) {
159 ContainerSchemaNode input = rpc.getInput();
161 JSONObject inputJSON = processDataNodeContainer(input, moduleName, models, schemaContext);
162 String filename = "(" + rpc.getQName().getLocalName() + ")input";
163 inputJSON.put("id", filename);
164 // writeToFile(filename, inputJSON.toString(2), moduleName);
165 models.put(filename, inputJSON);
168 ContainerSchemaNode output = rpc.getOutput();
169 if (output != null) {
170 JSONObject outputJSON = processDataNodeContainer(output, moduleName, models, schemaContext);
171 String filename = "(" + rpc.getQName().getLocalName() + ")output";
172 outputJSON.put("id", filename);
173 models.put(filename, outputJSON);
179 * Processes the 'identity' statement in a yang model and maps it to a 'model' in the Swagger JSON spec.
182 * The module from which the identity stmt will be processed
184 * The JSONObject in which the parsed identity will be put as a 'model' obj
186 private static void processIdentities(final Module module, final JSONObject models) throws JSONException {
188 String moduleName = module.getName();
189 Set<IdentitySchemaNode> idNodes = module.getIdentities();
190 LOG.debug("Processing Identities for module {} . Found {} identity statements", moduleName, idNodes.size());
192 for (IdentitySchemaNode idNode : idNodes) {
193 JSONObject identityObj = new JSONObject();
194 String identityName = idNode.getQName().getLocalName();
195 LOG.debug("Processing Identity: {}", identityName);
197 identityObj.put(ID_KEY, identityName);
198 identityObj.put(DESCRIPTION_KEY, idNode.getDescription());
200 JSONObject props = new JSONObject();
201 IdentitySchemaNode baseId = idNode.getBaseIdentity();
203 if (baseId == null) {
205 * This is a base identity. So lets see if it has sub types. If it does, then add them to the model
208 Set<IdentitySchemaNode> derivedIds = idNode.getDerivedIdentities();
210 if (derivedIds != null) {
211 JSONArray subTypes = new JSONArray();
212 for (IdentitySchemaNode derivedId : derivedIds) {
213 subTypes.put(derivedId.getQName().getLocalName());
215 identityObj.put(SUB_TYPES_KEY, subTypes);
219 * This is a derived entity. Add it's base type & move on.
221 props.put(TYPE_KEY, baseId.getQName().getLocalName());
224 // Add the properties. For a base type, this will be an empty object as required by the Swagger spec.
225 identityObj.put(PROPERTIES_KEY, props);
226 models.put(identityName, identityObj);
231 * Processes the container and list nodes and populates the moduleJSON.
233 private JSONObject processDataNodeContainer(final DataNodeContainer dataNode, final String moduleName, final JSONObject models,
234 final SchemaContext schemaContext) throws JSONException, IOException {
235 return processDataNodeContainer(dataNode, moduleName, models, true, schemaContext);
238 private JSONObject processDataNodeContainer(final DataNodeContainer dataNode, final String moduleName, final JSONObject models,
239 final boolean isConfig, final SchemaContext schemaContext) throws JSONException, IOException {
240 if (dataNode instanceof ListSchemaNode || dataNode instanceof ContainerSchemaNode) {
241 Preconditions.checkArgument(dataNode instanceof SchemaNode, "Data node should be also schema node");
242 Iterable<DataSchemaNode> containerChildren = dataNode.getChildNodes();
243 JSONObject properties = processChildren(containerChildren, ((SchemaNode) dataNode).getQName(), moduleName,
244 models, isConfig, schemaContext);
246 String nodeName = (isConfig ? OperationBuilder.CONFIG : OperationBuilder.OPERATIONAL)
247 + ((SchemaNode) dataNode).getQName().getLocalName();
249 JSONObject childSchema = getSchemaTemplate();
250 childSchema.put(TYPE_KEY, OBJECT_TYPE);
251 childSchema.put(PROPERTIES_KEY, properties);
252 childSchema.put("id", nodeName);
253 models.put(nodeName, childSchema);
256 createConcreteModelForPost(models, ((SchemaNode) dataNode).getQName().getLocalName(),
257 createPropertiesForPost(dataNode));
260 JSONObject items = new JSONObject();
261 items.put(REF_KEY, nodeName);
262 JSONObject dataNodeProperties = new JSONObject();
263 dataNodeProperties.put(TYPE_KEY, dataNode instanceof ListSchemaNode ? ARRAY_TYPE : OBJECT_TYPE);
264 dataNodeProperties.put(ITEMS_KEY, items);
266 return dataNodeProperties;
271 private static void createConcreteModelForPost(final JSONObject models, final String localName,
272 final JSONObject properties) throws JSONException {
273 String nodePostName = OperationBuilder.CONFIG + localName + Post.METHOD_NAME;
274 JSONObject postSchema = getSchemaTemplate();
275 postSchema.put(TYPE_KEY, OBJECT_TYPE);
276 postSchema.put("id", nodePostName);
277 postSchema.put(PROPERTIES_KEY, properties);
278 models.put(nodePostName, postSchema);
281 private JSONObject createPropertiesForPost(final DataNodeContainer dataNodeContainer) throws JSONException {
282 JSONObject properties = new JSONObject();
283 for (DataSchemaNode childNode : dataNodeContainer.getChildNodes()) {
284 if (childNode instanceof ListSchemaNode || childNode instanceof ContainerSchemaNode) {
285 JSONObject items = new JSONObject();
286 items.put(REF_KEY, "(config)" + childNode.getQName().getLocalName());
287 JSONObject property = new JSONObject();
288 property.put(TYPE_KEY, childNode instanceof ListSchemaNode ? ARRAY_TYPE : OBJECT_TYPE);
289 property.put(ITEMS_KEY, items);
290 properties.put(childNode.getQName().getLocalName(), property);
291 } else if (childNode instanceof LeafSchemaNode) {
292 JSONObject property = processLeafNode((LeafSchemaNode)childNode);
293 properties.put(childNode.getQName().getLocalName(), property);
299 private JSONObject processChildren(final Iterable<DataSchemaNode> nodes, final QName parentQName, final String moduleName,
300 final JSONObject models, final SchemaContext schemaContext) throws JSONException, IOException {
301 return processChildren(nodes, parentQName, moduleName, models, true, schemaContext);
305 * Processes the nodes.
307 private JSONObject processChildren(final Iterable<DataSchemaNode> nodes, final QName parentQName,
308 final String moduleName, final JSONObject models, final boolean isConfig, final SchemaContext schemaContext)
309 throws JSONException, IOException {
311 JSONObject properties = new JSONObject();
313 for (DataSchemaNode node : nodes) {
314 if (node.isConfiguration() == isConfig) {
316 String name = resolveNodesName(node, topLevelModule, schemaContext);
317 JSONObject property = null;
318 if (node instanceof LeafSchemaNode) {
319 property = processLeafNode((LeafSchemaNode) node);
320 } else if (node instanceof ListSchemaNode) {
321 property = processDataNodeContainer((ListSchemaNode) node, moduleName, models, isConfig,
324 } else if (node instanceof LeafListSchemaNode) {
325 property = processLeafListNode((LeafListSchemaNode) node);
327 } else if (node instanceof ChoiceSchemaNode) {
328 property = processChoiceNode((ChoiceSchemaNode) node, moduleName, models, schemaContext);
330 } else if (node instanceof AnyXmlSchemaNode) {
331 property = processAnyXMLNode((AnyXmlSchemaNode) node);
333 } else if (node instanceof ContainerSchemaNode) {
334 property = processDataNodeContainer((ContainerSchemaNode) node, moduleName, models, isConfig,
338 throw new IllegalArgumentException("Unknown DataSchemaNode type: " + node.getClass());
341 property.putOpt(DESCRIPTION_KEY, node.getDescription());
342 properties.put(name, property);
348 private JSONObject processLeafListNode(final LeafListSchemaNode listNode) throws JSONException {
349 JSONObject props = new JSONObject();
350 props.put(TYPE_KEY, ARRAY_TYPE);
352 JSONObject itemsVal = new JSONObject();
353 processTypeDef(listNode.getType(), itemsVal);
354 props.put(ITEMS_KEY, itemsVal);
356 ConstraintDefinition constraints = listNode.getConstraints();
357 processConstraints(constraints, props);
362 private JSONObject processChoiceNode(final ChoiceSchemaNode choiceNode, final String moduleName, final JSONObject models,
363 final SchemaContext schemaContext) throws JSONException, IOException {
365 Set<ChoiceCaseNode> cases = choiceNode.getCases();
367 JSONArray choiceProps = new JSONArray();
368 for (ChoiceCaseNode choiceCase : cases) {
369 String choiceName = choiceCase.getQName().getLocalName();
370 JSONObject choiceProp = processChildren(choiceCase.getChildNodes(), choiceCase.getQName(), moduleName,
371 models, schemaContext);
372 JSONObject choiceObj = new JSONObject();
373 choiceObj.put(choiceName, choiceProp);
374 choiceObj.put(TYPE_KEY, OBJECT_TYPE);
375 choiceProps.put(choiceObj);
378 JSONObject oneOfProps = new JSONObject();
379 oneOfProps.put(ONE_OF_KEY, choiceProps);
380 oneOfProps.put(TYPE_KEY, OBJECT_TYPE);
385 private static void processConstraints(final ConstraintDefinition constraints, final JSONObject props) throws JSONException {
386 boolean isMandatory = constraints.isMandatory();
387 props.put(REQUIRED_KEY, isMandatory);
389 Integer minElements = constraints.getMinElements();
390 Integer maxElements = constraints.getMaxElements();
391 if (minElements != null) {
392 props.put(MIN_ITEMS, minElements);
394 if (maxElements != null) {
395 props.put(MAX_ITEMS, maxElements);
399 private JSONObject processLeafNode(final LeafSchemaNode leafNode) throws JSONException {
400 JSONObject property = new JSONObject();
402 String leafDescription = leafNode.getDescription();
403 property.put(DESCRIPTION_KEY, leafDescription);
405 processConstraints(leafNode.getConstraints(), property);
406 processTypeDef(leafNode.getType(), property);
411 private static JSONObject processAnyXMLNode(final AnyXmlSchemaNode leafNode) throws JSONException {
412 JSONObject property = new JSONObject();
414 String leafDescription = leafNode.getDescription();
415 property.put(DESCRIPTION_KEY, leafDescription);
417 processConstraints(leafNode.getConstraints(), property);
422 private void processTypeDef(final TypeDefinition<?> leafTypeDef, final JSONObject property) throws JSONException {
423 if (leafTypeDef instanceof ExtendedType) {
424 processExtendedType(leafTypeDef, property);
425 } else if (leafTypeDef instanceof BinaryTypeDefinition) {
426 processBinaryType((BinaryTypeDefinition) leafTypeDef, property);
427 } else if (leafTypeDef instanceof BitsTypeDefinition) {
428 processBitsType((BitsTypeDefinition) leafTypeDef, property);
429 } else if (leafTypeDef instanceof EnumTypeDefinition) {
430 processEnumType((EnumTypeDefinition) leafTypeDef, property);
431 } else if (leafTypeDef instanceof IdentityrefTypeDefinition) {
432 property.putOpt(TYPE_KEY,
433 ((IdentityrefTypeDefinition) leafTypeDef).getIdentity().getQName().getLocalName());
434 } else if (leafTypeDef instanceof StringTypeDefinition) {
435 processStringType((StringTypeDefinition) leafTypeDef, property);
436 } else if (leafTypeDef instanceof UnionTypeDefinition) {
437 processUnionType((UnionTypeDefinition) leafTypeDef, property);
439 String jsonType = jsonTypeFor(leafTypeDef);
440 if (jsonType == null) {
443 property.putOpt(TYPE_KEY, jsonType);
447 private void processExtendedType(final TypeDefinition<?> leafTypeDef, final JSONObject property) throws JSONException {
448 TypeDefinition<?> leafBaseType = leafTypeDef.getBaseType();
449 if (leafBaseType instanceof ExtendedType) {
450 // recursively process an extended type until we hit a base type
451 processExtendedType(leafBaseType, property);
453 List<LengthConstraint> lengthConstraints = ((ExtendedType) leafTypeDef).getLengthConstraints();
454 for (LengthConstraint lengthConstraint : lengthConstraints) {
455 Number min = lengthConstraint.getMin();
456 Number max = lengthConstraint.getMax();
457 property.putOpt(MIN_LENGTH_KEY, min);
458 property.putOpt(MAX_LENGTH_KEY, max);
460 String jsonType = jsonTypeFor(leafBaseType);
461 property.putOpt(TYPE_KEY, jsonType);
466 private static void processBinaryType(final BinaryTypeDefinition binaryType, final JSONObject property) throws JSONException {
467 property.put(TYPE_KEY, STRING);
468 JSONObject media = new JSONObject();
469 media.put(BINARY_ENCODING_KEY, BASE_64);
470 property.put(MEDIA_KEY, media);
473 private static void processEnumType(final EnumTypeDefinition enumLeafType, final JSONObject property) throws JSONException {
474 List<EnumPair> enumPairs = enumLeafType.getValues();
475 List<String> enumNames = new ArrayList<>();
476 for (EnumPair enumPair : enumPairs) {
477 enumNames.add(enumPair.getName());
479 property.putOpt(ENUM, new JSONArray(enumNames));
482 private static void processBitsType(final BitsTypeDefinition bitsType, final JSONObject property) throws JSONException {
483 property.put(TYPE_KEY, ARRAY_TYPE);
484 property.put(MIN_ITEMS, 0);
485 property.put(UNIQUE_ITEMS_KEY, true);
486 JSONArray enumValues = new JSONArray();
488 List<Bit> bits = bitsType.getBits();
489 for (Bit bit : bits) {
490 enumValues.put(bit.getName());
492 JSONObject itemsValue = new JSONObject();
493 itemsValue.put(ENUM, enumValues);
494 property.put(ITEMS_KEY, itemsValue);
497 private static void processStringType(final StringTypeDefinition stringType, final JSONObject property) throws JSONException {
498 StringTypeDefinition type = stringType;
499 List<LengthConstraint> lengthConstraints = stringType.getLengthConstraints();
500 while (lengthConstraints.isEmpty() && type.getBaseType() != null) {
501 type = type.getBaseType();
502 lengthConstraints = type.getLengthConstraints();
505 // FIXME: json-schema is not expressive enough to capture min/max laternatives. We should find the true minimum
506 // and true maximum implied by the constraints and use that.
507 for (LengthConstraint lengthConstraint : lengthConstraints) {
508 Number min = lengthConstraint.getMin();
509 Number max = lengthConstraint.getMax();
510 property.putOpt(MIN_LENGTH_KEY, min);
511 property.putOpt(MAX_LENGTH_KEY, max);
514 property.put(TYPE_KEY, STRING);
517 private static void processUnionType(final UnionTypeDefinition unionType, final JSONObject property) throws JSONException {
518 StringBuilder type = new StringBuilder();
519 for (TypeDefinition<?> typeDef : unionType.getTypes()) {
520 if (type.length() > 0) {
523 type.append(jsonTypeFor(typeDef));
526 property.put(TYPE_KEY, type);
530 * Helper method to generate a pre-filled JSON schema object.
532 private static JSONObject getSchemaTemplate() throws JSONException {
533 JSONObject schemaJSON = new JSONObject();
534 schemaJSON.put(SCHEMA_KEY, SCHEMA_URL);