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.mdsal.binding.generator.util;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Preconditions.checkState;
13 import com.google.common.base.MoreObjects;
14 import com.google.common.base.Preconditions;
15 import com.google.common.cache.CacheBuilder;
16 import com.google.common.cache.CacheLoader;
17 import com.google.common.cache.LoadingCache;
18 import com.google.common.collect.BiMap;
19 import com.google.common.collect.HashBiMap;
20 import com.google.common.collect.ImmutableMap;
21 import com.google.common.collect.ImmutableSet;
22 import com.google.common.collect.Iterables;
23 import java.util.AbstractMap.SimpleEntry;
24 import java.util.ArrayList;
25 import java.util.Collection;
26 import java.util.HashMap;
27 import java.util.HashSet;
28 import java.util.Iterator;
29 import java.util.List;
31 import java.util.Map.Entry;
32 import java.util.Optional;
34 import org.eclipse.jdt.annotation.Nullable;
35 import org.opendaylight.mdsal.binding.generator.api.BindingRuntimeTypes;
36 import org.opendaylight.mdsal.binding.generator.api.ClassLoadingStrategy;
37 import org.opendaylight.mdsal.binding.generator.impl.BindingGeneratorImpl;
38 import org.opendaylight.mdsal.binding.generator.impl.BindingSchemaContextUtils;
39 import org.opendaylight.mdsal.binding.model.api.GeneratedType;
40 import org.opendaylight.mdsal.binding.model.api.JavaTypeName;
41 import org.opendaylight.mdsal.binding.model.api.MethodSignature;
42 import org.opendaylight.mdsal.binding.model.api.ParameterizedType;
43 import org.opendaylight.mdsal.binding.model.api.Type;
44 import org.opendaylight.mdsal.binding.model.api.type.builder.GeneratedTypeBuilder;
45 import org.opendaylight.mdsal.binding.model.util.ReferencedTypeImpl;
46 import org.opendaylight.mdsal.binding.spec.naming.BindingMapping;
47 import org.opendaylight.yangtools.concepts.Immutable;
48 import org.opendaylight.yangtools.yang.binding.Action;
49 import org.opendaylight.yangtools.yang.binding.Augmentation;
50 import org.opendaylight.yangtools.yang.common.QName;
51 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
52 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
53 import org.opendaylight.yangtools.yang.model.api.AugmentationSchemaNode;
54 import org.opendaylight.yangtools.yang.model.api.AugmentationTarget;
55 import org.opendaylight.yangtools.yang.model.api.CaseSchemaNode;
56 import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
57 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
58 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
59 import org.opendaylight.yangtools.yang.model.api.DocumentedNode.WithStatus;
60 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
61 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
62 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
63 import org.opendaylight.yangtools.yang.model.api.type.EnumTypeDefinition;
64 import org.opendaylight.yangtools.yang.model.util.EffectiveAugmentationSchema;
65 import org.opendaylight.yangtools.yang.model.util.SchemaNodeUtils;
66 import org.slf4j.Logger;
67 import org.slf4j.LoggerFactory;
70 * Runtime Context for Java YANG Binding classes
72 * <p>Runtime Context provides additional insight in Java YANG Binding,
73 * binding classes and underlying YANG schema, it contains
74 * runtime information, which could not be derived from generated
75 * classes alone using {@link org.opendaylight.mdsal.binding.spec.reflect.BindingReflections}.
77 * <p>Some of this information are for example list of all available
78 * children for cases {@link #getChoiceCaseChildren(DataNodeContainer)}, since
79 * choices are augmentable and new choices may be introduced by additional models.
81 * <p>Same goes for all possible augmentations.
83 public final class BindingRuntimeContext implements Immutable {
85 private static final Logger LOG = LoggerFactory.getLogger(BindingRuntimeContext.class);
86 private static final char DOT = '.';
88 private final BindingRuntimeTypes runtimeTypes;
89 private final ClassLoadingStrategy strategy;
90 private final SchemaContext schemaContext;
92 private final LoadingCache<QName, Class<?>> identityClasses = CacheBuilder.newBuilder().weakValues().build(
93 new CacheLoader<QName, Class<?>>() {
95 public Class<?> load(final QName key) {
96 final Optional<Type> identityType = runtimeTypes.findIdentity(key);
97 checkArgument(identityType.isPresent(), "Supplied QName %s is not a valid identity", key);
99 return strategy.loadClass(identityType.get());
100 } catch (final ClassNotFoundException e) {
101 throw new IllegalArgumentException("Required class " + identityType + "was not found.", e);
106 private BindingRuntimeContext(final ClassLoadingStrategy strategy, final SchemaContext schema) {
107 this.strategy = strategy;
108 this.schemaContext = schema;
109 runtimeTypes = new BindingGeneratorImpl().generateTypeMapping(schema);
113 * Creates Binding Runtime Context from supplied class loading strategy and schema context.
115 * @param strategy Class loading strategy to retrieve generated Binding classes
116 * @param ctx Schema Context which describes YANG model and to which Binding classes should be mapped
117 * @return Instance of BindingRuntimeContext for supplied schema context.
119 public static BindingRuntimeContext create(final ClassLoadingStrategy strategy, final SchemaContext ctx) {
120 return new BindingRuntimeContext(strategy, ctx);
124 * Returns a class loading strategy associated with this binding runtime context
125 * which is used to load classes.
127 * @return Class loading strategy.
129 public ClassLoadingStrategy getStrategy() {
134 * Returns an stable immutable view of schema context associated with this Binding runtime context.
136 * @return stable view of schema context
138 public SchemaContext getSchemaContext() {
139 return schemaContext;
143 * Returns schema of augmentation.
145 * <p>Returned schema is schema definition from which augmentation class was generated.
146 * This schema is isolated from other augmentations. This means it contains
147 * augmentation definition as was present in original YANG module.
149 * <p>Children of returned schema does not contain any additional augmentations,
150 * which may be present in runtime for them, thus returned schema is unsuitable
151 * for use for validation of data.
153 * <p>For retrieving {@link AugmentationSchemaNode}, which will contains
154 * full model for child nodes, you should use method
155 * {@link #getResolvedAugmentationSchema(DataNodeContainer, Class)}
156 * which will return augmentation schema derived from supplied augmentation target
159 * @param augClass Augmentation class
160 * @return Schema of augmentation or null if augmentaiton is not known in this context
161 * @throws IllegalArgumentException If supplied class is not an augmentation
163 public @Nullable AugmentationSchemaNode getAugmentationDefinition(final Class<?> augClass) {
164 checkArgument(Augmentation.class.isAssignableFrom(augClass),
165 "Class %s does not represent augmentation", augClass);
166 return runtimeTypes.findAugmentation(referencedType(augClass)).orElse(null);
170 * Returns defining {@link DataSchemaNode} for supplied class.
172 * <p>Returned schema is schema definition from which class was generated.
173 * This schema may be isolated from augmentations, if supplied class
174 * represent node, which was child of grouping or augmentation.
176 * <p>For getting augmentation schema from augmentation class use
177 * {@link #getAugmentationDefinition(Class)} instead.
179 * @param cls Class which represents list, container, choice or case.
180 * @return Schema node, from which class was generated.
182 public DataSchemaNode getSchemaDefinition(final Class<?> cls) {
183 checkArgument(!Augmentation.class.isAssignableFrom(cls), "Supplied class must not be an augmentation (%s is)",
185 checkArgument(!Action.class.isAssignableFrom(cls), "Supplied class must not be an action (%s is)", cls);
186 return (DataSchemaNode) runtimeTypes.findSchema(referencedType(cls)).orElse(null);
189 public ActionDefinition getActionDefinition(final Class<? extends Action<?, ?, ?>> cls) {
190 return (ActionDefinition) runtimeTypes.findSchema(referencedType(cls)).orElse(null);
193 public Entry<AugmentationIdentifier, AugmentationSchemaNode> getResolvedAugmentationSchema(
194 final DataNodeContainer target, final Class<? extends Augmentation<?>> aug) {
195 final AugmentationSchemaNode origSchema = getAugmentationDefinition(aug);
196 checkArgument(origSchema != null, "Augmentation %s is not known in current schema context", aug);
198 * FIXME: Validate augmentation schema lookup
200 * Currently this algorithm, does not verify if instantiated child nodes
201 * are real one derived from augmentation schema. The problem with
202 * full validation is, if user used copy builders, he may use
203 * augmentation which was generated for different place.
205 * If this augmentations have same definition, we emit same identifier
206 * with data and it is up to underlying user to validate data.
209 final Set<QName> childNames = new HashSet<>();
210 final Set<DataSchemaNode> realChilds = new HashSet<>();
211 for (final DataSchemaNode child : origSchema.getChildNodes()) {
212 final DataSchemaNode dataChildQNname = target.getDataChildByName(child.getQName());
213 final String childLocalName = child.getQName().getLocalName();
214 if (dataChildQNname == null) {
215 for (DataSchemaNode dataSchemaNode : target.getChildNodes()) {
216 if (childLocalName.equals(dataSchemaNode.getQName().getLocalName())) {
217 realChilds.add(dataSchemaNode);
218 childNames.add(dataSchemaNode.getQName());
222 realChilds.add(dataChildQNname);
223 childNames.add(child.getQName());
227 final AugmentationIdentifier identifier = AugmentationIdentifier.create(childNames);
228 final AugmentationSchemaNode proxy = new EffectiveAugmentationSchema(origSchema, realChilds);
229 return new SimpleEntry<>(identifier, proxy);
233 * Returns resolved case schema for supplied class.
235 * @param schema Resolved parent choice schema
236 * @param childClass Class representing case.
237 * @return Optionally a resolved case schema,.empty if the choice is not legal in
239 * @throws IllegalArgumentException If supplied class does not represent case.
241 public Optional<CaseSchemaNode> getCaseSchemaDefinition(final ChoiceSchemaNode schema, final Class<?> childClass) {
242 final DataSchemaNode origSchema = getSchemaDefinition(childClass);
243 checkArgument(origSchema instanceof CaseSchemaNode, "Supplied schema %s is not case.", origSchema);
245 /* FIXME: Make sure that if there are multiple augmentations of same
246 * named case, with same structure we treat it as equals
247 * this is due property of Binding specification and copy builders
248 * that user may be unaware that he is using incorrect case
249 * which was generated for choice inside grouping.
251 final Optional<CaseSchemaNode> found = BindingSchemaContextUtils.findInstantiatedCase(schema,
252 (CaseSchemaNode) origSchema);
257 * Returns schema ({@link DataSchemaNode}, {@link AugmentationSchemaNode} or {@link TypeDefinition})
258 * from which supplied class was generated. Returned schema may be augmented with
259 * additional information, which was not available at compile type
260 * (e.g. third party augmentations).
262 * @param type Binding Class for which schema should be retrieved.
263 * @return Instance of generated type (definition of Java API), along with
264 * {@link DataSchemaNode}, {@link AugmentationSchemaNode} or {@link TypeDefinition}
265 * which was used to generate supplied class.
267 public Entry<GeneratedType, WithStatus> getTypeWithSchema(final Class<?> type) {
268 return getTypeWithSchema(referencedType(type));
271 private Entry<GeneratedType, WithStatus> getTypeWithSchema(final Type referencedType) {
272 final WithStatus schema = runtimeTypes.findSchema(referencedType).orElseThrow(
273 () -> new NullPointerException("Failed to find schema for type " + referencedType));
274 final Type definedType = runtimeTypes.findType(schema).orElseThrow(
275 () -> new NullPointerException("Failed to find defined type for " + referencedType + " schema " + schema));
277 if (definedType instanceof GeneratedTypeBuilder) {
278 return new SimpleEntry<>(((GeneratedTypeBuilder) definedType).build(), schema);
280 checkArgument(definedType instanceof GeneratedType, "Type %s is not a GeneratedType", referencedType);
281 return new SimpleEntry<>((GeneratedType) definedType, schema);
284 public ImmutableMap<Type, Entry<Type, Type>> getChoiceCaseChildren(final DataNodeContainer schema) {
285 final Map<Type, Entry<Type, Type>> childToCase = new HashMap<>();
287 for (final ChoiceSchemaNode choice : Iterables.filter(schema.getChildNodes(), ChoiceSchemaNode.class)) {
288 final ChoiceSchemaNode originalChoice = getOriginalSchema(choice);
289 final Optional<Type> optType = runtimeTypes.findType(originalChoice);
290 checkState(optType.isPresent(), "Failed to find generated type for choice %s", originalChoice);
291 final Type choiceType = optType.get();
293 for (Type caze : runtimeTypes.findCases(referencedType(choiceType))) {
294 final Entry<Type,Type> caseIdentifier = new SimpleEntry<>(choiceType, caze);
295 final HashSet<Type> caseChildren = new HashSet<>();
296 if (caze instanceof GeneratedTypeBuilder) {
297 caze = ((GeneratedTypeBuilder) caze).build();
299 collectAllContainerTypes((GeneratedType) caze, caseChildren);
300 for (final Type caseChild : caseChildren) {
301 childToCase.put(caseChild, caseIdentifier);
305 return ImmutableMap.copyOf(childToCase);
309 * Map enum constants: yang - java.
311 * @param enumClass enum generated class
312 * @return mapped enum constants from yang with their corresponding values in generated binding classes
314 public BiMap<String, String> getEnumMapping(final Class<?> enumClass) {
315 final Entry<GeneratedType, WithStatus> typeWithSchema = getTypeWithSchema(enumClass);
316 return getEnumMapping(typeWithSchema);
320 * Map enum constants: yang - java.
322 * @param enumClassName enum generated class name
323 * @return mapped enum constants from yang with their corresponding values in generated binding classes
325 public BiMap<String, String> getEnumMapping(final String enumClassName) {
326 return getEnumMapping(findTypeWithSchema(enumClassName));
329 private static BiMap<String, String> getEnumMapping(final Entry<GeneratedType, WithStatus> typeWithSchema) {
330 final TypeDefinition<?> typeDef = (TypeDefinition<?>) typeWithSchema.getValue();
332 Preconditions.checkArgument(typeDef instanceof EnumTypeDefinition);
333 final EnumTypeDefinition enumType = (EnumTypeDefinition) typeDef;
335 final HashBiMap<String, String> mappedEnums = HashBiMap.create();
337 for (final EnumTypeDefinition.EnumPair enumPair : enumType.getValues()) {
338 mappedEnums.put(enumPair.getName(), BindingMapping.getClassName(enumPair.getName()));
341 // TODO cache these maps for future use
345 private Entry<GeneratedType, WithStatus> findTypeWithSchema(final String className) {
346 // All we have is a straight FQCN, which we need to split into a hierarchical JavaTypeName. This involves
347 // some amount of guesswork -- we do that by peeling components at the dot and trying out, e.g. given
348 // "foo.bar.baz.Foo.Bar.Baz" we end up trying:
349 // "foo.bar.baz.Foo.Bar" + "Baz"
350 // "foo.bar.baz.Foo" + Bar" + "Baz"
351 // "foo.bar.baz" + Foo" + Bar" + "Baz"
353 // And see which one sticks. We cannot rely on capital letters, as they can be used in package names, too.
354 // Nested classes are not common, so we should be arriving at the result pretty quickly.
355 final List<String> components = new ArrayList<>();
356 String packageName = className;
358 for (int lastDot = packageName.lastIndexOf(DOT); lastDot != -1; lastDot = packageName.lastIndexOf(DOT)) {
359 components.add(packageName.substring(lastDot + 1));
360 packageName = packageName.substring(0, lastDot);
362 final Iterator<String> it = components.iterator();
363 JavaTypeName name = JavaTypeName.create(packageName, it.next());
364 while (it.hasNext()) {
365 name = name.createEnclosed(it.next());
368 final Type type = new ReferencedTypeImpl(name);
369 final Optional<WithStatus> optSchema = runtimeTypes.findSchema(type);
370 if (!optSchema.isPresent()) {
374 final WithStatus schema = optSchema.get();
375 final Optional<Type> optDefinedType = runtimeTypes.findType(schema);
376 if (!optDefinedType.isPresent()) {
380 final Type definedType = optDefinedType.get();
381 if (definedType instanceof GeneratedTypeBuilder) {
382 return new SimpleEntry<>(((GeneratedTypeBuilder) definedType).build(), schema);
384 checkArgument(definedType instanceof GeneratedType, "Type %s is not a GeneratedType", className);
385 return new SimpleEntry<>((GeneratedType) definedType, schema);
388 throw new IllegalArgumentException("Failed to find type for " + className);
391 public Set<Class<?>> getCases(final Class<?> choice) {
392 final Collection<Type> cazes = runtimeTypes.findCases(referencedType(choice));
393 final Set<Class<?>> ret = new HashSet<>(cazes.size());
394 for (final Type caze : cazes) {
396 final Class<?> c = strategy.loadClass(caze);
398 } catch (final ClassNotFoundException e) {
399 LOG.warn("Failed to load class for case {}, ignoring it", caze, e);
405 public Class<?> getClassForSchema(final SchemaNode childSchema) {
406 final SchemaNode origSchema = getOriginalSchema(childSchema);
407 final Optional<Type> clazzType = runtimeTypes.findType(origSchema);
408 checkArgument(clazzType.isPresent(), "Failed to find binding type for %s (original %s)",
409 childSchema, origSchema);
412 return strategy.loadClass(clazzType.get());
413 } catch (final ClassNotFoundException e) {
414 throw new IllegalStateException(e);
418 public ImmutableMap<AugmentationIdentifier, Type> getAvailableAugmentationTypes(final DataNodeContainer container) {
419 final Map<AugmentationIdentifier, Type> identifierToType = new HashMap<>();
420 if (container instanceof AugmentationTarget) {
421 final Set<AugmentationSchemaNode> augments = ((AugmentationTarget) container).getAvailableAugmentations();
422 for (final AugmentationSchemaNode augment : augments) {
423 // Augmentation must have child nodes if is to be used with Binding classes
424 AugmentationSchemaNode augOrig = augment;
425 while (augOrig.getOriginalDefinition().isPresent()) {
426 augOrig = augOrig.getOriginalDefinition().get();
429 if (!augment.getChildNodes().isEmpty()) {
430 final Optional<Type> augType = runtimeTypes.findType(augOrig);
431 if (augType.isPresent()) {
432 identifierToType.put(getAugmentationIdentifier(augment), augType.get());
438 return ImmutableMap.copyOf(identifierToType);
441 private static AugmentationIdentifier getAugmentationIdentifier(final AugmentationSchemaNode augment) {
442 // FIXME: use DataSchemaContextNode.augmentationIdentifierFrom() once it does caching
443 return AugmentationIdentifier.create(augment.getChildNodes().stream().map(DataSchemaNode::getQName)
444 .collect(ImmutableSet.toImmutableSet()));
447 private static Type referencedType(final Class<?> type) {
448 return new ReferencedTypeImpl(JavaTypeName.create(type));
451 private static Type referencedType(final Type type) {
452 if (type instanceof ReferencedTypeImpl) {
455 return new ReferencedTypeImpl(type.getIdentifier());
458 private static Set<Type> collectAllContainerTypes(final GeneratedType type, final Set<Type> collection) {
459 for (final MethodSignature definition : type.getMethodDefinitions()) {
460 Type childType = definition.getReturnType();
461 if (childType instanceof ParameterizedType) {
462 childType = ((ParameterizedType) childType).getActualTypeArguments()[0];
464 if (childType instanceof GeneratedType || childType instanceof GeneratedTypeBuilder) {
465 collection.add(referencedType(childType));
468 for (final Type parent : type.getImplements()) {
469 if (parent instanceof GeneratedType) {
470 collectAllContainerTypes((GeneratedType) parent, collection);
476 private static <T extends SchemaNode> T getOriginalSchema(final T choice) {
477 @SuppressWarnings("unchecked")
478 final T original = (T) SchemaNodeUtils.getRootOriginalIfPossible(choice);
479 if (original != null) {
485 public Class<?> getIdentityClass(final QName input) {
486 return identityClasses.getUnchecked(input);
490 public String toString() {
491 return MoreObjects.toStringHelper(this)
492 .add("ClassLoadingStrategy", strategy)
493 .add("runtimeTypes", runtimeTypes)
494 .add("schemaContext", schemaContext).toString();