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;
12 import com.fasterxml.jackson.databind.JsonNode;
13 import com.fasterxml.jackson.databind.node.ArrayNode;
14 import com.fasterxml.jackson.databind.node.JsonNodeFactory;
15 import com.fasterxml.jackson.databind.node.ObjectNode;
16 import com.fasterxml.jackson.databind.node.TextNode;
17 import com.google.common.collect.Range;
18 import com.google.common.collect.RangeSet;
19 import com.mifmif.common.regex.Generex;
20 import java.io.IOException;
21 import java.util.List;
22 import java.util.Optional;
24 import java.util.regex.Pattern;
25 import org.opendaylight.netconf.sal.rest.doc.model.builder.OperationBuilder;
26 import org.opendaylight.netconf.sal.rest.doc.model.builder.OperationBuilder.Post;
27 import org.opendaylight.yangtools.yang.common.QName;
28 import org.opendaylight.yangtools.yang.model.api.AnyXmlSchemaNode;
29 import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
30 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
31 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
32 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
33 import org.opendaylight.yangtools.yang.model.api.ElementCountConstraint;
34 import org.opendaylight.yangtools.yang.model.api.IdentitySchemaNode;
35 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
36 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
37 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
38 import org.opendaylight.yangtools.yang.model.api.MandatoryAware;
39 import org.opendaylight.yangtools.yang.model.api.Module;
40 import org.opendaylight.yangtools.yang.model.api.RevisionAwareXPath;
41 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
42 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
43 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
44 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
45 import org.opendaylight.yangtools.yang.model.api.TypedDataSchemaNode;
46 import org.opendaylight.yangtools.yang.model.api.type.BinaryTypeDefinition;
47 import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition;
48 import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition.Bit;
49 import org.opendaylight.yangtools.yang.model.api.type.BooleanTypeDefinition;
50 import org.opendaylight.yangtools.yang.model.api.type.EmptyTypeDefinition;
51 import org.opendaylight.yangtools.yang.model.api.type.EnumTypeDefinition;
52 import org.opendaylight.yangtools.yang.model.api.type.EnumTypeDefinition.EnumPair;
53 import org.opendaylight.yangtools.yang.model.api.type.IdentityrefTypeDefinition;
54 import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
55 import org.opendaylight.yangtools.yang.model.api.type.LengthConstraint;
56 import org.opendaylight.yangtools.yang.model.api.type.PatternConstraint;
57 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
58 import org.opendaylight.yangtools.yang.model.api.type.RangeRestrictedTypeDefinition;
59 import org.opendaylight.yangtools.yang.model.api.type.StringTypeDefinition;
60 import org.opendaylight.yangtools.yang.model.api.type.UnionTypeDefinition;
61 import org.opendaylight.yangtools.yang.model.util.RevisionAwareXPathImpl;
62 import org.opendaylight.yangtools.yang.model.util.SchemaContextUtil;
63 import org.slf4j.Logger;
64 import org.slf4j.LoggerFactory;
67 * Generates JSON Schema for data defined in YANG. This class is not thread-safe.
69 public class ModelGenerator {
71 private static final Logger LOG = LoggerFactory.getLogger(ModelGenerator.class);
73 private static final Pattern STRIP_PATTERN = Pattern.compile("\\[[^\\[\\]]*\\]");
74 private static final String BASE_64 = "base64";
75 private static final String BINARY_ENCODING_KEY = "binaryEncoding";
76 private static final String MEDIA_KEY = "media";
77 private static final String UNIQUE_ITEMS_KEY = "uniqueItems";
78 private static final String MAX_ITEMS = "maxItems";
79 private static final String MIN_ITEMS = "minItems";
80 private static final String SCHEMA_URL = "http://json-schema.org/draft-04/schema";
81 private static final String SCHEMA_KEY = "$schema";
82 private static final String MAX_LENGTH_KEY = "maxLength";
83 private static final String MIN_LENGTH_KEY = "minLength";
84 private static final String REQUIRED_KEY = "required";
85 private static final String REF_KEY = "$ref";
86 private static final String ITEMS_KEY = "items";
87 private static final String TYPE_KEY = "type";
88 private static final String PROPERTIES_KEY = "properties";
89 private static final String DESCRIPTION_KEY = "description";
90 private static final String OBJECT_TYPE = "object";
91 private static final String ARRAY_TYPE = "array";
92 private static final String ENUM = "enum";
93 private static final String ID_KEY = "id";
94 private static final String SUB_TYPES_KEY = "subTypes";
95 private static final String UNIQUE_EMPTY_IDENTIFIER = "unique_empty_identifier";
97 private Module topLevelModule;
99 public ModelGenerator() {
103 * Creates Json models from provided module according to swagger spec.
105 * @param module - Yang module to be converted
106 * @param schemaContext - SchemaContext of all Yang files used by Api Doc
107 * @return ObjectNode containing data used for creating examples and models in Api Doc
108 * @throws IOException if I/O operation fails
110 public ObjectNode convertToJsonSchema(final Module module,
111 final SchemaContext schemaContext) throws IOException {
112 final ObjectNode models = JsonNodeFactory.instance.objectNode();
113 final ObjectNode emptyIdentifier = JsonNodeFactory.instance.objectNode();
114 models.set(UNIQUE_EMPTY_IDENTIFIER, emptyIdentifier);
115 topLevelModule = module;
116 processModules(module, models, schemaContext);
117 processContainersAndLists(module, models, schemaContext);
118 processRPCs(module, models, schemaContext);
119 processIdentities(module, models);
123 private void processModules(final Module module, final ObjectNode models,
124 final SchemaContext schemaContext) {
125 createConcreteModelForPost(models, module.getName() + BaseYangSwaggerGenerator.MODULE_NAME_SUFFIX,
126 createPropertiesForPost(module, schemaContext, module.getName()));
129 private void processContainersAndLists(final Module module, final ObjectNode models,
130 final SchemaContext schemaContext) throws IOException {
131 final String moduleName = module.getName();
133 for (final DataSchemaNode childNode : module.getChildNodes()) {
134 // For every container and list in the module
135 if (childNode instanceof ContainerSchemaNode || childNode instanceof ListSchemaNode) {
136 processDataNodeContainer((DataNodeContainer) childNode, moduleName, models, true, schemaContext);
137 processDataNodeContainer((DataNodeContainer) childNode, moduleName, models, false, schemaContext);
143 * Process the RPCs for a Module Spits out a file each of the name
144 * {@code <rpcName>-input.json and <rpcName>-output.json}
145 * for each RPC that contains input & output elements.
147 * @param module module
148 * @throws IOException if I/O operation fails
150 private void processRPCs(final Module module, final ObjectNode models,
151 final SchemaContext schemaContext) throws IOException {
152 final Set<RpcDefinition> rpcs = module.getRpcs();
153 final String moduleName = module.getName();
154 for (final RpcDefinition rpc : rpcs) {
155 final ContainerSchemaNode input = rpc.getInput();
156 if (!input.getChildNodes().isEmpty()) {
157 final ObjectNode properties =
158 processChildren(input.getChildNodes(), moduleName, models, true, schemaContext);
160 final String filename = "(" + rpc.getQName().getLocalName() + ")input";
161 final ObjectNode childSchema = getSchemaTemplate();
162 childSchema.put(TYPE_KEY, OBJECT_TYPE);
163 childSchema.set(PROPERTIES_KEY, properties);
164 childSchema.put(ID_KEY, filename);
165 models.set(filename, childSchema);
167 processTopData(filename, models, input);
170 final ContainerSchemaNode output = rpc.getOutput();
171 if (!output.getChildNodes().isEmpty()) {
172 final ObjectNode properties =
173 processChildren(output.getChildNodes(), moduleName, models, true, schemaContext);
174 final String filename = "(" + rpc.getQName().getLocalName() + ")output";
175 final ObjectNode childSchema = getSchemaTemplate();
176 childSchema.put(TYPE_KEY, OBJECT_TYPE);
177 childSchema.set(PROPERTIES_KEY, properties);
178 childSchema.put(ID_KEY, filename);
179 models.set(filename, childSchema);
181 processTopData(filename, models, output);
186 private ObjectNode processTopData(final String filename, final ObjectNode models, final SchemaNode schemaNode) {
187 final ObjectNode items = JsonNodeFactory.instance.objectNode();
189 items.put(REF_KEY, filename);
190 final ObjectNode dataNodeProperties = JsonNodeFactory.instance.objectNode();
191 dataNodeProperties.put(TYPE_KEY, schemaNode instanceof ListSchemaNode ? ARRAY_TYPE : OBJECT_TYPE);
192 dataNodeProperties.set(ITEMS_KEY, items);
194 putIfNonNull(dataNodeProperties, DESCRIPTION_KEY, schemaNode.getDescription().orElse(null));
195 final ObjectNode properties = JsonNodeFactory.instance.objectNode();
196 properties.set(topLevelModule.getName() + ":" + schemaNode.getQName().getLocalName(), dataNodeProperties);
197 final ObjectNode finalChildSchema = getSchemaTemplate();
198 finalChildSchema.put(TYPE_KEY, OBJECT_TYPE);
199 finalChildSchema.set(PROPERTIES_KEY, properties);
200 finalChildSchema.put(ID_KEY, filename + OperationBuilder.TOP);
201 models.set(filename + OperationBuilder.TOP, finalChildSchema);
203 return dataNodeProperties;
207 * Processes the 'identity' statement in a yang model and maps it to a 'model' in the Swagger JSON spec.
209 * @param module The module from which the identity stmt will be processed
210 * @param models The ObjectNode in which the parsed identity will be put as a 'model' obj
212 private static void processIdentities(final Module module, final ObjectNode models) {
214 final String moduleName = module.getName();
215 final Set<IdentitySchemaNode> idNodes = module.getIdentities();
216 LOG.debug("Processing Identities for module {} . Found {} identity statements", moduleName, idNodes.size());
218 for (final IdentitySchemaNode idNode : idNodes) {
219 final ObjectNode identityObj = JsonNodeFactory.instance.objectNode();
220 final String identityName = idNode.getQName().getLocalName();
221 LOG.debug("Processing Identity: {}", identityName);
223 identityObj.put(ID_KEY, identityName);
224 putIfNonNull(identityObj, DESCRIPTION_KEY, idNode.getDescription().orElse(null));
226 final ObjectNode props = JsonNodeFactory.instance.objectNode();
228 if (idNode.getBaseIdentities().isEmpty()) {
230 * This is a base identity. So lets see if it has sub types. If it does, then add them to the model
233 final Set<IdentitySchemaNode> derivedIds = idNode.getDerivedIdentities();
235 if (derivedIds != null) {
236 final ArrayNode subTypes = new ArrayNode(JsonNodeFactory.instance);
237 for (final IdentitySchemaNode derivedId : derivedIds) {
238 subTypes.add(derivedId.getQName().getLocalName());
240 identityObj.set(SUB_TYPES_KEY, subTypes);
245 * This is a derived entity. Add it's base type & move on.
247 props.put(TYPE_KEY, idNode.getBaseIdentities().iterator().next().getQName().getLocalName());
250 // Add the properties. For a base type, this will be an empty object as required by the Swagger spec.
251 identityObj.set(PROPERTIES_KEY, props);
252 models.set(identityName, identityObj);
256 private ObjectNode processDataNodeContainer(
257 final DataNodeContainer dataNode, final String parentName, final ObjectNode models, final boolean isConfig,
258 final SchemaContext schemaContext) throws IOException {
259 if (dataNode instanceof ListSchemaNode || dataNode instanceof ContainerSchemaNode) {
260 final Iterable<DataSchemaNode> containerChildren = dataNode.getChildNodes();
261 final String localName = ((SchemaNode) dataNode).getQName().getLocalName();
262 final ObjectNode properties =
263 processChildren(containerChildren, parentName + "/" + localName, models, isConfig, schemaContext);
264 final String nodeName = parentName + (isConfig ? OperationBuilder.CONFIG : OperationBuilder.OPERATIONAL)
267 final ObjectNode childSchema = getSchemaTemplate();
268 childSchema.put(TYPE_KEY, OBJECT_TYPE);
269 childSchema.set(PROPERTIES_KEY, properties);
271 childSchema.put(ID_KEY, nodeName);
272 models.set(nodeName, childSchema);
275 createConcreteModelForPost(models, localName,
276 createPropertiesForPost(dataNode, schemaContext, parentName + "/" + localName));
279 return processTopData(nodeName, models, (SchemaNode) dataNode);
284 private static void createConcreteModelForPost(final ObjectNode models, final String localName,
285 final JsonNode properties) {
286 final String nodePostName = OperationBuilder.CONFIG + localName + Post.METHOD_NAME;
287 final ObjectNode postSchema = getSchemaTemplate();
288 postSchema.put(TYPE_KEY, OBJECT_TYPE);
289 postSchema.put(ID_KEY, nodePostName);
290 postSchema.set(PROPERTIES_KEY, properties);
291 models.set(nodePostName, postSchema);
294 private JsonNode createPropertiesForPost(final DataNodeContainer dataNodeContainer,
295 final SchemaContext schemaContext, final String parentName) {
296 final ObjectNode properties = JsonNodeFactory.instance.objectNode();
297 for (final DataSchemaNode childNode : dataNodeContainer.getChildNodes()) {
298 if (childNode instanceof ListSchemaNode || childNode instanceof ContainerSchemaNode) {
299 final ObjectNode items = JsonNodeFactory.instance.objectNode();
300 items.put(REF_KEY, parentName + "(config)" + childNode.getQName().getLocalName());
301 final ObjectNode property = JsonNodeFactory.instance.objectNode();
302 property.put(TYPE_KEY, childNode instanceof ListSchemaNode ? ARRAY_TYPE : OBJECT_TYPE);
303 property.set(ITEMS_KEY, items);
304 properties.set(childNode.getQName().getLocalName(), property);
305 } else if (childNode instanceof LeafSchemaNode) {
306 final ObjectNode property = processLeafNode((LeafSchemaNode) childNode, schemaContext);
307 properties.set(childNode.getQName().getLocalName(), property);
314 * Processes the nodes.
316 private ObjectNode processChildren(
317 final Iterable<DataSchemaNode> nodes, final String parentName, final ObjectNode models,
318 final boolean isConfig, final SchemaContext schemaContext) throws IOException {
319 final ObjectNode properties = JsonNodeFactory.instance.objectNode();
320 for (final DataSchemaNode node : nodes) {
321 if (node.isConfiguration() == isConfig) {
322 final String name = resolveNodesName(node, topLevelModule, schemaContext);
323 final ObjectNode property;
324 if (node instanceof LeafSchemaNode) {
325 property = processLeafNode((LeafSchemaNode) node, schemaContext);
327 } else if (node instanceof ListSchemaNode) {
328 property = processDataNodeContainer((ListSchemaNode) node, parentName, models, isConfig,
331 } else if (node instanceof LeafListSchemaNode) {
332 property = processLeafListNode((LeafListSchemaNode) node, schemaContext);
334 } else if (node instanceof ChoiceSchemaNode) {
335 if (((ChoiceSchemaNode) node).getCases().values().iterator().hasNext()) {
336 processChoiceNode(((ChoiceSchemaNode) node).getCases().values().iterator().next()
337 .getChildNodes(), parentName, models, schemaContext, isConfig, properties);
341 } else if (node instanceof AnyXmlSchemaNode) {
342 property = processAnyXMLNode((AnyXmlSchemaNode) node);
344 } else if (node instanceof ContainerSchemaNode) {
345 property = processDataNodeContainer((ContainerSchemaNode) node, parentName, models, isConfig,
349 throw new IllegalArgumentException("Unknown DataSchemaNode type: " + node.getClass());
351 putIfNonNull(property, DESCRIPTION_KEY, node.getDescription().orElse(null));
352 properties.set(topLevelModule.getName() + ":" + name, property);
358 private ObjectNode processLeafListNode(final LeafListSchemaNode listNode,
359 final SchemaContext schemaContext) {
360 final ObjectNode props = JsonNodeFactory.instance.objectNode();
361 props.put(TYPE_KEY, ARRAY_TYPE);
363 final ObjectNode itemsVal = JsonNodeFactory.instance.objectNode();
364 final Optional<ElementCountConstraint> optConstraint = listNode.getElementCountConstraint();
366 if (optConstraint.isPresent()) {
367 final Integer constraintMax = optConstraint.get().getMaxElements();
368 max = constraintMax == null ? 2 : constraintMax;
369 processElementCount(optConstraint.get(), props);
375 processTypeDef(listNode.getType(), listNode, itemsVal, schemaContext);
376 processTypeDef(listNode.getType(), listNode, itemsVal, schemaContext);
378 processTypeDef(listNode.getType(), listNode, itemsVal, schemaContext);
380 props.set(ITEMS_KEY, itemsVal);
385 private void processChoiceNode(
386 final Iterable<DataSchemaNode> nodes, final String moduleName, final ObjectNode models,
387 final SchemaContext schemaContext, final boolean isConfig, final ObjectNode properties)
389 for (final DataSchemaNode node : nodes) {
390 final String name = resolveNodesName(node, topLevelModule, schemaContext);
391 final ObjectNode property;
393 if (node instanceof LeafSchemaNode) {
394 property = processLeafNode((LeafSchemaNode) node, schemaContext);
396 } else if (node instanceof ListSchemaNode) {
397 property = processDataNodeContainer((ListSchemaNode) node, moduleName, models, isConfig,
400 } else if (node instanceof LeafListSchemaNode) {
401 property = processLeafListNode((LeafListSchemaNode) node, schemaContext);
403 } else if (node instanceof ChoiceSchemaNode) {
404 if (((ChoiceSchemaNode) node).getCases().values().iterator().hasNext()) {
405 processChoiceNode(((ChoiceSchemaNode) node).getCases().values().iterator().next().getChildNodes(),
406 moduleName, models, schemaContext, isConfig, properties);
410 } else if (node instanceof AnyXmlSchemaNode) {
411 property = processAnyXMLNode((AnyXmlSchemaNode) node);
413 } else if (node instanceof ContainerSchemaNode) {
414 property = processDataNodeContainer((ContainerSchemaNode) node, moduleName, models, isConfig,
418 throw new IllegalArgumentException("Unknown DataSchemaNode type: " + node.getClass());
421 putIfNonNull(property, DESCRIPTION_KEY, node.getDescription().orElse(null));
422 properties.set(name, property);
426 private static void processElementCount(final ElementCountConstraint constraint, final ObjectNode props) {
427 final Integer minElements = constraint.getMinElements();
428 if (minElements != null) {
429 props.put(MIN_ITEMS, minElements);
431 final Integer maxElements = constraint.getMaxElements();
432 if (maxElements != null) {
433 props.put(MAX_ITEMS, maxElements);
437 private static void processMandatory(final MandatoryAware node, final ObjectNode props) {
438 props.put(REQUIRED_KEY, node.isMandatory());
441 private ObjectNode processLeafNode(final LeafSchemaNode leafNode,
442 final SchemaContext schemaContext) {
443 final ObjectNode property = JsonNodeFactory.instance.objectNode();
445 final String leafDescription = leafNode.getDescription().orElse(null);
446 putIfNonNull(property, DESCRIPTION_KEY, leafDescription);
447 processMandatory(leafNode, property);
448 processTypeDef(leafNode.getType(), leafNode, property, schemaContext);
453 private static ObjectNode processAnyXMLNode(final AnyXmlSchemaNode leafNode) {
454 final ObjectNode property = JsonNodeFactory.instance.objectNode();
456 final String leafDescription = leafNode.getDescription().orElse(null);
457 putIfNonNull(property, DESCRIPTION_KEY, leafDescription);
459 processMandatory(leafNode, property);
460 final String localName = leafNode.getQName().getLocalName();
461 property.put(TYPE_KEY, "example of anyxml " + localName);
466 private String processTypeDef(final TypeDefinition<?> leafTypeDef, final DataSchemaNode node,
467 final ObjectNode property, final SchemaContext schemaContext) {
468 final String jsonType;
469 if (leafTypeDef.getDefaultValue() == null) {
470 if (leafTypeDef instanceof BinaryTypeDefinition) {
471 jsonType = processBinaryType(property);
473 } else if (leafTypeDef instanceof BitsTypeDefinition) {
474 jsonType = processBitsType((BitsTypeDefinition) leafTypeDef, property);
476 } else if (leafTypeDef instanceof EnumTypeDefinition) {
477 jsonType = processEnumType((EnumTypeDefinition) leafTypeDef, property);
479 } else if (leafTypeDef instanceof IdentityrefTypeDefinition) {
480 final String name = topLevelModule.getName();
481 jsonType = name + ":" + ((IdentityrefTypeDefinition) leafTypeDef).getIdentities().iterator().next()
482 .getQName().getLocalName();
484 } else if (leafTypeDef instanceof StringTypeDefinition) {
485 jsonType = processStringType(leafTypeDef, property, node.getQName().getLocalName());
487 } else if (leafTypeDef instanceof UnionTypeDefinition) {
488 jsonType = processUnionType((UnionTypeDefinition) leafTypeDef, property, schemaContext, node);
490 } else if (leafTypeDef instanceof EmptyTypeDefinition) {
491 jsonType = UNIQUE_EMPTY_IDENTIFIER;
493 } else if (leafTypeDef instanceof LeafrefTypeDefinition) {
494 return processLeafRef(node, property, schemaContext, leafTypeDef);
496 } else if (leafTypeDef instanceof BooleanTypeDefinition) {
499 } else if (leafTypeDef instanceof RangeRestrictedTypeDefinition) {
500 final Number maybeLower = ((RangeRestrictedTypeDefinition<?, ?>) leafTypeDef).getRangeConstraint()
501 .map(RangeConstraint::getAllowedRanges).map(RangeSet::span).map(Range::lowerEndpoint)
503 jsonType = String.valueOf(maybeLower);
506 jsonType = OBJECT_TYPE;
510 jsonType = String.valueOf(leafTypeDef.getDefaultValue());
512 putIfNonNull(property, TYPE_KEY, jsonType);
516 private String processLeafRef(final DataSchemaNode node, final ObjectNode property,
517 final SchemaContext schemaContext, final TypeDefinition<?> leafTypeDef) {
518 RevisionAwareXPath xpath = ((LeafrefTypeDefinition) leafTypeDef).getPathStatement();
519 final SchemaNode schemaNode;
521 final String xPathString = STRIP_PATTERN.matcher(xpath.toString()).replaceAll("");
522 xpath = new RevisionAwareXPathImpl(xPathString, xpath.isAbsolute());
525 if (xpath.isAbsolute()) {
526 module = findModule(schemaContext, leafTypeDef.getQName());
527 schemaNode = SchemaContextUtil.findDataSchemaNode(schemaContext, module, xpath);
529 module = findModule(schemaContext, node.getQName());
530 schemaNode = SchemaContextUtil.findDataSchemaNodeForRelativeXPath(schemaContext, module, node, xpath);
533 return processTypeDef(((TypedDataSchemaNode) schemaNode).getType(), (DataSchemaNode) schemaNode,
534 property, schemaContext);
537 private static Module findModule(final SchemaContext schemaContext, final QName qualifiedName) {
538 return schemaContext.findModule(qualifiedName.getNamespace(), qualifiedName.getRevision()).orElse(null);
541 private static String processBinaryType(final ObjectNode property) {
542 final ObjectNode media = JsonNodeFactory.instance.objectNode();
543 media.put(BINARY_ENCODING_KEY, BASE_64);
544 property.set(MEDIA_KEY, media);
548 private static String processEnumType(final EnumTypeDefinition enumLeafType,
549 final ObjectNode property) {
550 final List<EnumPair> enumPairs = enumLeafType.getValues();
551 ArrayNode enumNames = new ArrayNode(JsonNodeFactory.instance);
552 for (final EnumPair enumPair : enumPairs) {
553 enumNames.add(new TextNode(enumPair.getName()));
556 property.set(ENUM, enumNames);
557 return enumLeafType.getValues().iterator().next().getName();
560 private static String processBitsType(final BitsTypeDefinition bitsType,
561 final ObjectNode property) {
562 property.put(MIN_ITEMS, 0);
563 property.put(UNIQUE_ITEMS_KEY, true);
564 ArrayNode enumNames = new ArrayNode(JsonNodeFactory.instance);
565 final List<Bit> bits = bitsType.getBits();
566 for (final Bit bit : bits) {
567 enumNames.add(new TextNode(bit.getName()));
569 property.set(ENUM, enumNames);
571 return enumNames.iterator().next() + " " + enumNames.get(enumNames.size() - 1);
574 private static String processStringType(final TypeDefinition<?> stringType,
575 final ObjectNode property, final String nodeName) {
576 StringTypeDefinition type = (StringTypeDefinition) stringType;
577 Optional<LengthConstraint> lengthConstraints = ((StringTypeDefinition) stringType).getLengthConstraint();
578 while (!lengthConstraints.isPresent() && type.getBaseType() != null) {
579 type = type.getBaseType();
580 lengthConstraints = type.getLengthConstraint();
583 if (lengthConstraints.isPresent()) {
584 final Range<Integer> range = lengthConstraints.get().getAllowedRanges().span();
585 putIfNonNull(property, MIN_LENGTH_KEY, range.lowerEndpoint());
586 putIfNonNull(property, MAX_LENGTH_KEY, range.upperEndpoint());
589 if (type.getPatternConstraints().iterator().hasNext()) {
590 final PatternConstraint pattern = type.getPatternConstraints().iterator().next();
591 String regex = pattern.getJavaPatternString();
592 regex = regex.substring(1, regex.length() - 1);
593 final Generex generex = new Generex(regex);
594 return generex.random();
596 return "Some " + nodeName;
600 private String processUnionType(final UnionTypeDefinition unionType, final ObjectNode property,
601 final SchemaContext schemaContext, final DataSchemaNode node) {
602 final ArrayNode unionNames = new ArrayNode(JsonNodeFactory.instance);
603 for (final TypeDefinition<?> typeDef : unionType.getTypes()) {
604 unionNames.add(processTypeDef(typeDef, node, property, schemaContext));
606 property.set(ENUM, unionNames);
607 return unionNames.iterator().next().asText();
611 * Helper method to generate a pre-filled JSON schema object.
613 private static ObjectNode getSchemaTemplate() {
614 final ObjectNode schemaJSON = JsonNodeFactory.instance.objectNode();
615 schemaJSON.put(SCHEMA_KEY, SCHEMA_URL);
620 private static void putIfNonNull(final ObjectNode property, final String key, final Number number) {
621 if (key != null && number != null) {
622 if (number instanceof Double) {
623 property.put(key, (Double) number);
624 } else if (number instanceof Float) {
625 property.put(key, (Float) number);
626 } else if (number instanceof Integer) {
627 property.put(key, (Integer) number);
628 } else if (number instanceof Short) {
629 property.put(key, (Short) number);
630 } else if (number instanceof Long) {
631 property.put(key, (Long) number);
636 private static void putIfNonNull(final ObjectNode property, final String key, final String value) {
637 if (key != null && value != null) {
638 property.put(key, value);