2 * Copyright (c) 2015 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.yangtools.yang.parser.spi.meta;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.base.Strings;
14 import com.google.common.base.VerifyException;
15 import com.google.common.collect.ImmutableList;
16 import java.util.ArrayList;
17 import java.util.Collection;
18 import java.util.List;
19 import java.util.Optional;
21 import java.util.function.Predicate;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.yangtools.yang.common.QName;
24 import org.opendaylight.yangtools.yang.common.QNameModule;
25 import org.opendaylight.yangtools.yang.common.Revision;
26 import org.opendaylight.yangtools.yang.common.YangVersion;
27 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
28 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
29 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
30 import org.opendaylight.yangtools.yang.model.api.stmt.BelongsToStatement;
31 import org.opendaylight.yangtools.yang.model.api.stmt.KeyEffectiveStatement;
32 import org.opendaylight.yangtools.yang.model.api.stmt.KeyStatement;
33 import org.opendaylight.yangtools.yang.model.api.stmt.LeafStatement;
34 import org.opendaylight.yangtools.yang.model.api.stmt.MandatoryStatement;
35 import org.opendaylight.yangtools.yang.model.api.stmt.MinElementsStatement;
36 import org.opendaylight.yangtools.yang.model.api.stmt.ModuleStatement;
37 import org.opendaylight.yangtools.yang.model.api.stmt.PresenceEffectiveStatement;
38 import org.opendaylight.yangtools.yang.model.api.stmt.RevisionStatement;
39 import org.opendaylight.yangtools.yang.model.api.stmt.SubmoduleStatement;
40 import org.opendaylight.yangtools.yang.model.api.stmt.UnknownStatement;
41 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
42 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
43 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
44 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
45 import org.opendaylight.yangtools.yang.parser.spi.source.BelongsToPrefixToModuleName;
46 import org.opendaylight.yangtools.yang.parser.spi.source.ImportPrefixToModuleCtx;
47 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToModuleQName;
48 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleNameToModuleQName;
49 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
51 public final class StmtContextUtils {
52 private StmtContextUtils() {
56 @SuppressWarnings("unchecked")
57 public static <A, D extends DeclaredStatement<A>> A firstAttributeOf(
58 final Iterable<? extends StmtContext<?, ?, ?>> contexts, final Class<D> declaredType) {
59 for (final StmtContext<?, ?, ?> ctx : contexts) {
60 if (ctx.producesDeclared(declaredType)) {
61 return (A) ctx.argument();
67 @SuppressWarnings("unchecked")
68 public static <A, D extends DeclaredStatement<A>> A firstAttributeOf(final StmtContext<?, ?, ?> ctx,
69 final Class<D> declaredType) {
70 return ctx.producesDeclared(declaredType) ? (A) ctx.argument() : null;
73 public static <A, D extends DeclaredStatement<A>> A firstSubstatementAttributeOf(
74 final StmtContext<?, ?, ?> ctx, final Class<D> declaredType) {
75 return firstAttributeOf(ctx.allSubstatements(), declaredType);
78 @SuppressWarnings("unchecked")
79 public static <A, D extends DeclaredStatement<A>> StmtContext<A, ?, ?> findFirstDeclaredSubstatement(
80 final StmtContext<?, ?, ?> stmtContext, final Class<D> declaredType) {
81 for (final StmtContext<?, ?, ?> subStmtContext : stmtContext.declaredSubstatements()) {
82 if (subStmtContext.producesDeclared(declaredType)) {
83 return (StmtContext<A, ?, ?>) subStmtContext;
90 @SuppressWarnings({ "rawtypes", "unchecked" })
91 public static StmtContext<?, ?, ?> findFirstDeclaredSubstatement(final StmtContext<?, ?, ?> stmtContext,
92 int startIndex, final Class<? extends DeclaredStatement<?>>... types) {
93 if (startIndex >= types.length) {
97 for (final StmtContext<?, ?, ?> subStmtContext : stmtContext.declaredSubstatements()) {
98 if (subStmtContext.producesDeclared((Class) types[startIndex])) {
99 return startIndex + 1 == types.length ? subStmtContext : findFirstDeclaredSubstatement(subStmtContext,
100 ++startIndex, types);
106 @SuppressWarnings("unchecked")
107 public static <A, D extends DeclaredStatement<A>> Collection<StmtContext<A, D, ?>> findAllDeclaredSubstatements(
108 final StmtContext<?, ?, ?> stmtContext, final Class<D> declaredType) {
109 final ImmutableList.Builder<StmtContext<A, D, ?>> listBuilder = ImmutableList.builder();
110 for (final StmtContext<?, ?, ?> subStmtContext : stmtContext.declaredSubstatements()) {
111 if (subStmtContext.producesDeclared(declaredType)) {
112 listBuilder.add((StmtContext<A, D, ?>) subStmtContext);
115 return listBuilder.build();
118 @SuppressWarnings("unchecked")
119 public static <A, D extends DeclaredStatement<A>> Collection<StmtContext<A, D, ?>> findAllEffectiveSubstatements(
120 final StmtContext<?, ?, ?> stmtContext, final Class<D> type) {
121 final ImmutableList.Builder<StmtContext<A, D, ?>> listBuilder = ImmutableList.builder();
122 for (final StmtContext<?, ?, ?> subStmtContext : stmtContext.effectiveSubstatements()) {
123 if (subStmtContext.producesDeclared(type)) {
124 listBuilder.add((StmtContext<A, D, ?>) subStmtContext);
127 return listBuilder.build();
130 public static <A, D extends DeclaredStatement<A>> Collection<StmtContext<A, D, ?>> findAllSubstatements(
131 final StmtContext<?, ?, ?> stmtContext, final Class<D> type) {
132 final ImmutableList.Builder<StmtContext<A, D, ?>> listBuilder = ImmutableList.builder();
133 listBuilder.addAll(findAllDeclaredSubstatements(stmtContext, type));
134 listBuilder.addAll(findAllEffectiveSubstatements(stmtContext, type));
135 return listBuilder.build();
138 @SuppressWarnings("unchecked")
139 public static <A, D extends DeclaredStatement<A>> StmtContext<A, ?, ?> findFirstEffectiveSubstatement(
140 final StmtContext<?, ?, ?> stmtContext, final Class<D> declaredType) {
141 for (final StmtContext<?, ?, ?> subStmtContext : stmtContext.effectiveSubstatements()) {
142 if (subStmtContext.producesDeclared(declaredType)) {
143 return (StmtContext<A, ?, ?>) subStmtContext;
149 public static <D extends DeclaredStatement<?>> StmtContext<?, ?, ?> findFirstDeclaredSubstatementOnSublevel(
150 final StmtContext<?, ?, ?> stmtContext, final Class<? super D> declaredType, int sublevel) {
151 for (final StmtContext<?, ?, ?> subStmtContext : stmtContext.declaredSubstatements()) {
152 if (sublevel == 1 && subStmtContext.producesDeclared(declaredType)) {
153 return subStmtContext;
156 final StmtContext<?, ?, ?> result = findFirstDeclaredSubstatementOnSublevel(subStmtContext,
157 declaredType, --sublevel);
158 if (result != null) {
167 public static <D extends DeclaredStatement<?>> StmtContext<?, ?, ?> findDeepFirstDeclaredSubstatement(
168 final StmtContext<?, ?, ?> stmtContext, final Class<? super D> declaredType) {
169 for (final StmtContext<?, ?, ?> subStmtContext : stmtContext.declaredSubstatements()) {
170 if (subStmtContext.producesDeclared(declaredType)) {
171 return subStmtContext;
174 final StmtContext<?, ?, ?> result = findDeepFirstDeclaredSubstatement(subStmtContext, declaredType);
175 if (result != null) {
183 // FIXME: 8.0.0: This method goes back as far as YANGTOOLS-365, when we were build EffectiveStatements for
184 // unsupported YANG extensions. We are not doing that anymore, do we still need this method? Also, it
185 // is only used in augment support to disable mechanics on unknown nodes.
187 // It would seem we can move this method to AbstractAugmentStatementSupport at the very least, but
188 // also: augments are defined to operate on schema tree nodes, hence even if we have an
189 // UnknownStatement, but its EffectiveStatement projection supports SchemaTreeAwareEffectiveStatement
190 // we should operate normally -- the StatementSupport exposing such semantics is responsible for
191 // arranging the backend details.
192 public static boolean isInExtensionBody(final StmtContext<?, ?, ?> stmtCtx) {
193 StmtContext<?, ?, ?> current = stmtCtx;
196 final StmtContext<?, ?, ?> parent = current.coerceParentContext();
197 if (parent.getParentContext() == null) {
200 if (isUnknownStatement(parent)) {
208 * Returns true if supplied statement context represents unknown statement,
209 * otherwise returns false.
212 * statement context to be checked
213 * @return true if supplied statement context represents unknown statement,
215 * @throws NullPointerException
216 * if supplied statement context is null
218 public static boolean isUnknownStatement(final StmtContext<?, ?, ?> stmtCtx) {
219 return UnknownStatement.class.isAssignableFrom(stmtCtx.publicDefinition().getDeclaredRepresentationClass());
222 public static boolean checkFeatureSupport(final StmtContext<?, ?, ?> stmtContext,
223 final Set<QName> supportedFeatures) {
224 boolean isSupported = false;
225 boolean containsIfFeature = false;
226 for (final StmtContext<?, ?, ?> stmt : stmtContext.declaredSubstatements()) {
227 if (YangStmtMapping.IF_FEATURE.equals(stmt.publicDefinition())) {
228 containsIfFeature = true;
229 @SuppressWarnings("unchecked")
230 final Predicate<Set<QName>> argument = (Predicate<Set<QName>>) stmt.getArgument();
231 if (argument.test(supportedFeatures)) {
240 return !containsIfFeature || isSupported;
244 * Checks whether statement context is a presence container or not.
248 * @return true if it is a presence container
250 public static boolean isPresenceContainer(final StmtContext<?, ?, ?> stmtCtx) {
251 return stmtCtx.publicDefinition() == YangStmtMapping.CONTAINER && containsPresenceSubStmt(stmtCtx);
255 * Checks whether statement context is a non-presence container or not.
259 * @return true if it is a non-presence container
261 public static boolean isNonPresenceContainer(final StmtContext<?, ?, ?> stmtCtx) {
262 return stmtCtx.publicDefinition() == YangStmtMapping.CONTAINER && !containsPresenceSubStmt(stmtCtx);
265 private static boolean containsPresenceSubStmt(final StmtContext<?, ?, ?> stmtCtx) {
266 return stmtCtx.hasSubstatement(PresenceEffectiveStatement.class);
270 * Checks whether statement context is a mandatory leaf, choice, anyxml,
271 * list or leaf-list according to RFC6020 or not.
275 * @return true if it is a mandatory leaf, choice, anyxml, list or leaf-list
276 * according to RFC6020.
278 public static boolean isMandatoryNode(final StmtContext<?, ?, ?> stmtCtx) {
279 if (!(stmtCtx.publicDefinition() instanceof YangStmtMapping)) {
282 switch ((YangStmtMapping) stmtCtx.publicDefinition()) {
286 return Boolean.TRUE.equals(firstSubstatementAttributeOf(stmtCtx, MandatoryStatement.class));
289 final Integer minElements = firstSubstatementAttributeOf(stmtCtx, MinElementsStatement.class);
290 return minElements != null && minElements > 0;
297 * Checks whether a statement context is a statement of supplied statement
298 * definition and whether it is not mandatory leaf, choice, anyxml, list or
299 * leaf-list according to RFC6020.
304 * statement definition
305 * @return true if supplied statement context is a statement of supplied
306 * statement definition and if it is not mandatory leaf, choice,
307 * anyxml, list or leaf-list according to RFC6020
309 public static boolean isNotMandatoryNodeOfType(final StmtContext<?, ?, ?> stmtCtx,
310 final StatementDefinition stmtDef) {
311 return stmtCtx.publicDefinition().equals(stmtDef) && !isMandatoryNode(stmtCtx);
315 * Checks whether at least one ancestor of a StatementContext matches one from a collection of statement
318 * @param stmt Statement context to be checked
319 * @param ancestorTypes collection of statement definitions
320 * @return true if at least one ancestor of a StatementContext matches one
321 * from collection of statement definitions, otherwise false.
323 public static boolean hasAncestorOfType(final StmtContext<?, ?, ?> stmt,
324 final Collection<StatementDefinition> ancestorTypes) {
325 requireNonNull(ancestorTypes);
326 StmtContext<?, ?, ?> current = stmt.getParentContext();
327 while (current != null) {
328 if (ancestorTypes.contains(current.publicDefinition())) {
331 current = current.getParentContext();
337 * Check whether all of StmtContext's {@code list} ancestors have a {@code key}.
339 * @param stmt EffectiveStmtCtx to be checked
340 * @param name Human-friendly statement name
341 * @throws SourceException if there is any keyless list ancestor
343 public static void validateNoKeylessListAncestorOf(final Mutable<?, ?, ?> stmt, final String name) {
344 requireNonNull(stmt);
346 // We do not expect this to by typically populated
347 final List<Mutable<?, ?, ?>> incomplete = new ArrayList<>(0);
349 Mutable<?, ?, ?> current = stmt.coerceParentContext();
350 Mutable<?, ?, ?> parent = current.getParentContext();
351 while (parent != null) {
352 if (YangStmtMapping.LIST == current.publicDefinition()
353 && !current.hasSubstatement(KeyEffectiveStatement.class)) {
354 if (ModelProcessingPhase.FULL_DECLARATION.isCompletedBy(current.getCompletedPhase())) {
355 throw new SourceException(stmt, "%s %s is defined within a list that has no key statement", name,
359 // Ancestor has not completed full declaration yet missing 'key' statement may materialize later
360 incomplete.add(current);
364 parent = current.getParentContext();
367 // Deal with whatever incomplete ancestors we encountered
368 for (Mutable<?, ?, ?> ancestor : incomplete) {
369 // This check must complete during the ancestor's FULL_DECLARATION phase, i.e. the ancestor must not reach
370 // EFFECTIVE_MODEL until it is done.
371 final ModelActionBuilder action = ancestor.newInferenceAction(ModelProcessingPhase.FULL_DECLARATION);
372 action.apply(new InferenceAction() {
374 public void apply(final InferenceContext ctx) {
375 if (!ancestor.hasSubstatement(KeyEffectiveStatement.class)) {
376 throw new SourceException(stmt, "%s %s is defined within a list that has no key statement",
377 name, stmt.argument());
382 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
383 throw new VerifyException("Should never happen");
390 * Checks whether the parent of StmtContext is of specified type.
392 * @param ctx StmtContext to be checked
393 * @param parentType type of parent to check
394 * @return true if the parent of StmtContext is of specified type, otherwise false
396 public static boolean hasParentOfType(final StmtContext<?, ?, ?> ctx, final StatementDefinition parentType) {
397 requireNonNull(parentType);
398 final StmtContext<?, ?, ?> parentContext = ctx.getParentContext();
399 return parentContext != null && parentType.equals(parentContext.publicDefinition());
403 * Validates the specified statement context with regards to if-feature and when statement on list keys.
404 * The context can either be a leaf which is defined directly in the substatements of a keyed list or a uses
405 * statement defined in a keyed list (a uses statement may add leaves into the list).
408 * If one of the list keys contains an if-feature or a when statement in YANG 1.1 model, an exception is thrown.
410 * @param ctx statement context to be validated
412 public static void validateIfFeatureAndWhenOnListKeys(final StmtContext<?, ?, ?> ctx) {
413 if (!isRelevantForIfFeatureAndWhenOnListKeysCheck(ctx)) {
417 final StmtContext<?, ?, ?> listStmtCtx = ctx.coerceParentContext();
418 final StmtContext<Set<QName>, ?, ?> keyStmtCtx = findFirstDeclaredSubstatement(listStmtCtx, KeyStatement.class);
420 if (YangStmtMapping.LEAF.equals(ctx.publicDefinition())) {
421 if (isListKey(ctx, keyStmtCtx)) {
422 disallowIfFeatureAndWhenOnListKeys(ctx);
424 } else if (YangStmtMapping.USES.equals(ctx.publicDefinition())) {
425 findAllEffectiveSubstatements(listStmtCtx, LeafStatement.class).forEach(leafStmtCtx -> {
426 if (isListKey(leafStmtCtx, keyStmtCtx)) {
427 disallowIfFeatureAndWhenOnListKeys(leafStmtCtx);
433 private static boolean isRelevantForIfFeatureAndWhenOnListKeysCheck(final StmtContext<?, ?, ?> ctx) {
434 return YangVersion.VERSION_1_1.equals(ctx.yangVersion()) && hasParentOfType(ctx, YangStmtMapping.LIST)
435 && findFirstDeclaredSubstatement(ctx.coerceParentContext(), KeyStatement.class) != null;
438 private static boolean isListKey(final StmtContext<?, ?, ?> leafStmtCtx,
439 final StmtContext<Set<QName>, ?, ?> keyStmtCtx) {
440 return keyStmtCtx.getArgument().contains(leafStmtCtx.argument());
443 private static void disallowIfFeatureAndWhenOnListKeys(final StmtContext<?, ?, ?> leafStmtCtx) {
444 leafStmtCtx.allSubstatements().forEach(leafSubstmtCtx -> {
445 final StatementDefinition statementDef = leafSubstmtCtx.publicDefinition();
446 SourceException.throwIf(YangStmtMapping.IF_FEATURE.equals(statementDef)
447 || YangStmtMapping.WHEN.equals(statementDef), leafStmtCtx,
448 "%s statement is not allowed in %s leaf statement which is specified as a list key.",
449 statementDef.getStatementName(), leafStmtCtx.argument());
453 public static @NonNull QName qnameFromArgument(StmtContext<?, ?, ?> ctx, final String value) {
454 if (Strings.isNullOrEmpty(value)) {
455 return ctx.publicDefinition().getStatementName();
459 QNameModule qnameModule = null;
460 String localName = null;
462 final String[] namesParts = value.split(":");
463 switch (namesParts.length) {
465 localName = namesParts[0];
466 qnameModule = getRootModuleQName(ctx);
469 prefix = namesParts[0];
470 localName = namesParts[1];
471 qnameModule = getModuleQNameByPrefix(ctx, prefix);
472 // in case of unknown statement argument, we're not going to parse it
473 if (qnameModule == null && isUnknownStatement(ctx)) {
475 qnameModule = getRootModuleQName(ctx);
477 if (qnameModule == null && ctx.history().getLastOperation() == CopyType.ADDED_BY_AUGMENTATION) {
478 ctx = ctx.getOriginalCtx().orElse(null);
479 qnameModule = getModuleQNameByPrefix(ctx, prefix);
483 return internedQName(ctx, InferenceException.throwIfNull(qnameModule, ctx,
484 "Cannot resolve QNameModule for '%s'", value), localName);
488 * Parse a YANG identifier string in context of a statement.
490 * @param ctx Statement context
491 * @param str String to be parsed
492 * @return An interned QName
493 * @throws NullPointerException if any of the arguments are null
494 * @throws SourceException if the string is not a valid YANG identifier
496 public static @NonNull QName parseIdentifier(final StmtContext<?, ?, ?> ctx, final String str) {
497 SourceException.throwIf(str.isEmpty(), ctx, "Identifier may not be an empty string");
498 return internedQName(ctx, str);
501 public static @NonNull QName parseNodeIdentifier(final StmtContext<?, ?, ?> ctx, final String prefix,
502 final String localName) {
503 return internedQName(ctx,
504 InferenceException.throwIfNull(getModuleQNameByPrefix(ctx, prefix), ctx,
505 "Cannot resolve QNameModule for '%s'", prefix),
510 * Parse a YANG node identifier string in context of a statement.
512 * @param ctx Statement context
513 * @param str String to be parsed
514 * @return An interned QName
515 * @throws NullPointerException if any of the arguments are null
516 * @throws SourceException if the string is not a valid YANG node identifier
518 public static @NonNull QName parseNodeIdentifier(final StmtContext<?, ?, ?> ctx, final String str) {
519 SourceException.throwIf(str.isEmpty(), ctx, "Node identifier may not be an empty string");
521 final int colon = str.indexOf(':');
523 return internedQName(ctx, str);
526 final String prefix = str.substring(0, colon);
527 SourceException.throwIf(prefix.isEmpty(), ctx, "String '%s' has an empty prefix", str);
528 final String localName = str.substring(colon + 1);
529 SourceException.throwIf(localName.isEmpty(), ctx, "String '%s' has an empty identifier", str);
531 return parseNodeIdentifier(ctx, prefix, localName);
534 private static @NonNull QName internedQName(final StmtContext<?, ?, ?> ctx, final String localName) {
535 return internedQName(ctx, getRootModuleQName(ctx), localName);
538 private static @NonNull QName internedQName(final CommonStmtCtx ctx, final QNameModule module,
539 final String localName) {
540 final QName template;
542 template = QName.create(module, localName);
543 } catch (IllegalArgumentException e) {
544 throw new SourceException(ctx, e, "Invalid identifier '%s'", localName);
546 return template.intern();
549 public static QNameModule getRootModuleQName(final StmtContext<?, ?, ?> ctx) {
554 final StmtContext<?, ?, ?> rootCtx = ctx.getRoot();
555 final QNameModule qnameModule;
557 if (rootCtx.producesDeclared(ModuleStatement.class)) {
558 qnameModule = rootCtx.getFromNamespace(ModuleCtxToModuleQName.class, rootCtx);
559 } else if (rootCtx.producesDeclared(SubmoduleStatement.class)) {
560 final String belongsToModuleName = firstAttributeOf(rootCtx.declaredSubstatements(),
561 BelongsToStatement.class);
562 qnameModule = rootCtx.getFromNamespace(ModuleNameToModuleQName.class, belongsToModuleName);
567 checkArgument(qnameModule != null, "Failed to look up root QNameModule for %s", ctx);
571 public static QNameModule getModuleQNameByPrefix(final StmtContext<?, ?, ?> ctx, final String prefix) {
572 final StmtContext<?, ?, ?> root = ctx.getRoot();
573 final StmtContext<?, ?, ?> importedModule = root.getFromNamespace(ImportPrefixToModuleCtx.class, prefix);
574 final QNameModule qnameModule = ctx.getFromNamespace(ModuleCtxToModuleQName.class, importedModule);
575 if (qnameModule != null) {
579 if (root.producesDeclared(SubmoduleStatement.class)) {
580 final String moduleName = root.getFromNamespace(BelongsToPrefixToModuleName.class, prefix);
581 return ctx.getFromNamespace(ModuleNameToModuleQName.class, moduleName);
587 public static Optional<Revision> getLatestRevision(final Iterable<? extends StmtContext<?, ?, ?>> subStmts) {
588 Revision revision = null;
589 for (final StmtContext<?, ?, ?> subStmt : subStmts) {
590 if (subStmt.producesDeclared(RevisionStatement.class)) {
591 if (revision == null && subStmt.argument() != null) {
592 revision = (Revision) subStmt.argument();
594 final Revision subArg = (Revision) subStmt.argument();
595 if (subArg != null && subArg.compareTo(revision) > 0) {
601 return Optional.ofNullable(revision);