2 * Copyright (c) 2017 Pantheon Technologies, s.r.o. 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.rfc7950.stmt.augment;
10 import static com.google.common.base.Verify.verify;
12 import com.google.common.base.Verify;
13 import com.google.common.collect.ImmutableList;
14 import com.google.common.collect.ImmutableSet;
15 import com.google.common.collect.Lists;
16 import java.util.ArrayList;
17 import java.util.Collection;
18 import java.util.List;
19 import java.util.Objects;
20 import java.util.Optional;
21 import java.util.regex.Pattern;
22 import org.opendaylight.yangtools.yang.common.QName;
23 import org.opendaylight.yangtools.yang.common.YangVersion;
24 import org.opendaylight.yangtools.yang.model.api.AugmentationSchemaNode;
25 import org.opendaylight.yangtools.yang.model.api.Status;
26 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
27 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
28 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
29 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentEffectiveStatement;
30 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentStatement;
31 import org.opendaylight.yangtools.yang.model.api.stmt.DataDefinitionStatement;
32 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
33 import org.opendaylight.yangtools.yang.model.api.stmt.StatusEffectiveStatement;
34 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
35 import org.opendaylight.yangtools.yang.model.api.stmt.WhenStatement;
36 import org.opendaylight.yangtools.yang.parser.rfc7950.namespace.ChildSchemaNodeNamespace;
37 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.ArgumentUtils;
38 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
39 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.EffectiveStatementMixins.EffectiveStatementWithFlags.FlagsBuilder;
40 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
41 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
42 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
43 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
44 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
45 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
46 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
47 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
48 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
49 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
50 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
51 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
52 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
53 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
54 import org.slf4j.Logger;
55 import org.slf4j.LoggerFactory;
57 abstract class AbstractAugmentStatementSupport
58 extends BaseStatementSupport<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> {
59 private static final Logger LOG = LoggerFactory.getLogger(AbstractAugmentStatementSupport.class);
60 private static final Pattern PATH_REL_PATTERN1 = Pattern.compile("\\.\\.?\\s*/(.+)");
61 private static final Pattern PATH_REL_PATTERN2 = Pattern.compile("//.*");
63 AbstractAugmentStatementSupport() {
64 super(YangStmtMapping.AUGMENT);
68 public final SchemaNodeIdentifier parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
69 SourceException.throwIf(PATH_REL_PATTERN1.matcher(value).matches()
70 || PATH_REL_PATTERN2.matcher(value).matches(), ctx.getStatementSourceReference(),
71 "Augment argument \'%s\' is not valid, it can be only absolute path; or descendant if used in uses",
74 return ArgumentUtils.nodeIdentifierFromPath(ctx, value);
78 public final void onFullDefinitionDeclared(
79 final Mutable<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> augmentNode) {
80 if (!augmentNode.isSupportedByFeatures()) {
84 super.onFullDefinitionDeclared(augmentNode);
86 if (StmtContextUtils.isInExtensionBody(augmentNode)) {
90 final ModelActionBuilder augmentAction = augmentNode.newInferenceAction(
91 ModelProcessingPhase.EFFECTIVE_MODEL);
92 final Prerequisite<StmtContext<SchemaNodeIdentifier, AugmentStatement,
93 AugmentEffectiveStatement>> sourceCtxPrereq =
94 augmentAction.requiresCtx(augmentNode, ModelProcessingPhase.EFFECTIVE_MODEL);
95 final Prerequisite<Mutable<?, ?, EffectiveStatement<?, ?>>> target =
96 augmentAction.mutatesEffectiveCtxPath(getSearchRoot(augmentNode),
97 ChildSchemaNodeNamespace.class, augmentNode.coerceStatementArgument().getPathFromRoot());
99 augmentAction.apply(new InferenceAction() {
101 public void apply(final InferenceContext ctx) {
102 final StatementContextBase<?, ?, ?> augmentTargetCtx =
103 (StatementContextBase<?, ?, ?>) target.resolve(ctx);
104 if (!isSupportedAugmentTarget(augmentTargetCtx)
105 || StmtContextUtils.isInExtensionBody(augmentTargetCtx)) {
106 augmentNode.setIsSupportedToBuildEffective(false);
110 // We are targeting a context which is creating implicit nodes. In order to keep things consistent,
111 // we will need to circle back when creating effective statements.
112 if (augmentTargetCtx.hasImplicitParentSupport()) {
113 augmentNode.addToNs(AugmentImplicitHandlingNamespace.class, augmentNode, augmentTargetCtx);
116 final StatementContextBase<?, ?, ?> augmentSourceCtx = (StatementContextBase<?, ?, ?>) augmentNode;
117 // FIXME: this is a workaround for models which augment a node which is added via an extension
118 // which we do not handle. This needs to be reworked in terms of unknown schema nodes.
120 copyFromSourceToTarget(augmentSourceCtx, augmentTargetCtx);
121 augmentTargetCtx.addEffectiveSubstatement(augmentSourceCtx);
122 } catch (final SourceException e) {
123 LOG.warn("Failed to add augmentation {} defined at {}",
124 augmentTargetCtx.getStatementSourceReference(),
125 augmentSourceCtx.getStatementSourceReference(), e);
130 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
132 * Do not fail, if it is an uses-augment to an unknown node.
134 if (YangStmtMapping.USES == augmentNode.coerceParentContext().getPublicDefinition()) {
135 final SchemaNodeIdentifier augmentArg = augmentNode.coerceStatementArgument();
136 final Optional<StmtContext<?, ?, ?>> targetNode = ChildSchemaNodeNamespace.findNode(
137 getSearchRoot(augmentNode), augmentArg);
138 if (targetNode.isPresent() && StmtContextUtils.isUnknownStatement(targetNode.get())) {
139 augmentNode.setIsSupportedToBuildEffective(false);
140 LOG.warn("Uses-augment to unknown node {}. Augmentation has not been performed. At line: {}",
141 augmentArg, augmentNode.getStatementSourceReference());
146 throw new InferenceException(augmentNode.getStatementSourceReference(),
147 "Augment target '%s' not found", augmentNode.getStatementArgument());
153 protected final AugmentStatement createDeclared(final StmtContext<SchemaNodeIdentifier, AugmentStatement, ?> ctx,
154 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
155 return new RegularAugmentStatement(ctx, substatements);
159 protected final AugmentStatement createEmptyDeclared(
160 final StmtContext<SchemaNodeIdentifier, AugmentStatement, ?> ctx) {
161 return new EmptyAugmentStatement(ctx);
165 protected final List<? extends StmtContext<?, ?, ?>> statementsToBuild(
166 final StmtContext<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> ctx,
167 final List<? extends StmtContext<?, ?, ?>> substatements) {
168 final StatementContextBase<?, ?, ?> implicitDef = ctx.getFromNamespace(AugmentImplicitHandlingNamespace.class,
170 return implicitDef == null ? substatements : Lists.transform(substatements, subCtx -> {
171 verify(subCtx instanceof StatementContextBase);
172 return implicitDef.wrapWithImplicit((StatementContextBase<?, ?, ?>) subCtx);
177 protected final AugmentEffectiveStatement createEffective(
178 final StmtContext<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> ctx,
179 final AugmentStatement declared, final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
180 final int flags = new FlagsBuilder()
181 .setStatus(findFirstArgument(substatements, StatusEffectiveStatement.class, Status.CURRENT))
184 return new AugmentEffectiveStatementImpl(declared, ctx.coerceStatementArgument(), flags,
185 StmtContextUtils.getRootModuleQName(ctx), substatements, ctx.getStatementSourceReference(),
186 (AugmentationSchemaNode) ctx.getOriginalCtx().map(StmtContext::buildEffective).orElse(null));
190 protected final AugmentEffectiveStatement createEmptyEffective(
191 final StmtContext<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> ctx,
192 final AugmentStatement declared) {
193 return createEffective(ctx, declared, ImmutableList.of());
196 private static StmtContext<?, ?, ?> getSearchRoot(final StmtContext<?, ?, ?> augmentContext) {
197 // Augment is in uses - we need to augment instantiated nodes in parent.
198 final StmtContext<?, ?, ?> parent = augmentContext.coerceParentContext();
199 if (YangStmtMapping.USES == parent.getPublicDefinition()) {
200 return parent.getParentContext();
205 static void copyFromSourceToTarget(final StatementContextBase<?, ?, ?> sourceCtx,
206 final StatementContextBase<?, ?, ?> targetCtx) {
207 final CopyType typeOfCopy = sourceCtx.coerceParentContext().producesDeclared(UsesStatement.class)
208 ? CopyType.ADDED_BY_USES_AUGMENTATION : CopyType.ADDED_BY_AUGMENTATION;
210 * Since Yang 1.1, if an augmentation is made conditional with a
211 * "when" statement, it is allowed to add mandatory nodes.
213 final boolean skipCheckOfMandatoryNodes = YangVersion.VERSION_1_1.equals(sourceCtx.getRootVersion())
214 && isConditionalAugmentStmt(sourceCtx);
216 final Collection<? extends Mutable<?, ?, ?>> declared = sourceCtx.mutableDeclaredSubstatements();
217 final Collection<? extends Mutable<?, ?, ?>> effective = sourceCtx.mutableEffectiveSubstatements();
218 final Collection<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
220 for (final Mutable<?, ?, ?> originalStmtCtx : declared) {
221 if (originalStmtCtx.isSupportedByFeatures()) {
222 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes);
225 for (final Mutable<?, ?, ?> originalStmtCtx : effective) {
226 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes);
229 targetCtx.addEffectiveSubstatements(buffer);
233 * Checks whether supplied statement context is conditional augment
237 * statement context to be checked
239 * @return true if supplied statement context is conditional augment
240 * statement, otherwise false
242 private static boolean isConditionalAugmentStmt(final StmtContext<?, ?, ?> ctx) {
243 return ctx.getPublicDefinition() == YangStmtMapping.AUGMENT && hasWhenSubstatement(ctx);
246 private static boolean hasWhenSubstatement(final StmtContext<?, ?, ?> ctx) {
247 return StmtContextUtils.findFirstSubstatement(ctx, WhenStatement.class) != null;
250 private static void copyStatement(final Mutable<?, ?, ?> original, final StatementContextBase<?, ?, ?> target,
251 final CopyType typeOfCopy, final Collection<Mutable<?, ?, ?>> buffer,
252 final boolean skipCheckOfMandatoryNodes) {
253 if (needToCopyByAugment(original)) {
254 validateNodeCanBeCopiedByAugment(original, target, typeOfCopy, skipCheckOfMandatoryNodes);
256 buffer.add(target.childCopyOf(original, typeOfCopy));
257 } else if (isReusedByAugment(original)) {
258 buffer.add(original);
262 private static void validateNodeCanBeCopiedByAugment(final StmtContext<?, ?, ?> sourceCtx,
263 final StatementContextBase<?, ?, ?> targetCtx, final CopyType typeOfCopy,
264 final boolean skipCheckOfMandatoryNodes) {
266 if (sourceCtx.producesDeclared(WhenStatement.class)) {
270 if (!skipCheckOfMandatoryNodes && typeOfCopy == CopyType.ADDED_BY_AUGMENTATION
271 && requireCheckOfMandatoryNodes(sourceCtx, targetCtx)) {
272 checkForMandatoryNodes(sourceCtx);
275 // Data definition statements must not collide on their namespace
276 if (sourceCtx.producesDeclared(DataDefinitionStatement.class)) {
277 for (final StmtContext<?, ?, ?> subStatement : targetCtx.allSubstatements()) {
278 if (subStatement.producesDeclared(DataDefinitionStatement.class)) {
279 InferenceException.throwIf(
280 Objects.equals(sourceCtx.getStatementArgument(), subStatement.getStatementArgument()),
281 sourceCtx.getStatementSourceReference(),
282 "An augment cannot add node named '%s' because this name is already used in target",
283 sourceCtx.rawStatementArgument());
289 private static void checkForMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx) {
290 if (StmtContextUtils.isNonPresenceContainer(sourceCtx)) {
292 * We need to iterate over both declared and effective sub-statements,
293 * because a mandatory node can be:
294 * a) declared in augment body
295 * b) added to augment body also via uses of a grouping and
296 * such sub-statements are stored in effective sub-statements collection.
298 sourceCtx.allSubstatementsStream().forEach(AbstractAugmentStatementSupport::checkForMandatoryNodes);
301 InferenceException.throwIf(StmtContextUtils.isMandatoryNode(sourceCtx),
302 sourceCtx.getStatementSourceReference(),
303 "An augment cannot add node '%s' because it is mandatory and in module different than target",
304 sourceCtx.rawStatementArgument());
307 private static boolean requireCheckOfMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx,
308 Mutable<?, ?, ?> targetCtx) {
310 * If the statement argument is not QName, it cannot be mandatory
311 * statement, therefore return false and skip mandatory nodes validation
313 final Object arg = sourceCtx.getStatementArgument();
314 if (!(arg instanceof QName)) {
317 final QName sourceStmtQName = (QName) arg;
319 // RootStatementContext, for example
320 final Mutable<?, ?, ?> root = targetCtx.getRoot();
322 final Object targetArg = targetCtx.getStatementArgument();
323 Verify.verify(targetArg instanceof QName, "Argument of augment target statement must be QName, not %s",
325 final QName targetStmtQName = (QName) targetArg;
327 * If target is from another module, return true and perform mandatory nodes validation
329 if (!targetStmtQName.getModule().equals(sourceStmtQName.getModule())) {
334 * If target or one of the target's ancestors from the same namespace
335 * is a presence container
336 * or is non-mandatory choice
337 * or is non-mandatory list
338 * return false and skip mandatory nodes validation, because these nodes
339 * are not mandatory node containers according to RFC 6020 section 3.1.
341 if (StmtContextUtils.isPresenceContainer(targetCtx)
342 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.CHOICE)
343 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.LIST)) {
347 // This could be an augmentation stacked on top of a previous augmentation from the same module, which is
348 // conditional -- in which case we do not run further checks
349 if (targetCtx.getCopyHistory().getLastOperation() == CopyType.ADDED_BY_AUGMENTATION) {
350 final Optional<? extends StmtContext<?, ?, ?>> optPrevCopy = targetCtx.getPreviousCopyCtx();
351 if (optPrevCopy.isPresent()) {
352 final StmtContext<?, ?, ?> original = optPrevCopy.get();
353 final Object origArg = original.coerceStatementArgument();
354 Verify.verify(origArg instanceof QName, "Unexpected statement argument %s", origArg);
356 if (sourceStmtQName.getModule().equals(((QName) origArg).getModule())
357 && hasWhenSubstatement(getParentAugmentation(original))) {
362 } while ((targetCtx = targetCtx.getParentContext()) != root);
365 * All target node's parents belong to the same module as source node,
366 * therefore return false and skip mandatory nodes validation.
371 private static StmtContext<?, ?, ?> getParentAugmentation(final StmtContext<?, ?, ?> child) {
372 StmtContext<?, ?, ?> parent = Verify.verifyNotNull(child.getParentContext(), "Child %s has not parent", child);
373 while (parent.getPublicDefinition() != YangStmtMapping.AUGMENT) {
374 parent = Verify.verifyNotNull(parent.getParentContext(), "Failed to find augmentation parent of %s", child);
379 private static final ImmutableSet<YangStmtMapping> NOCOPY_DEF_SET = ImmutableSet.of(YangStmtMapping.USES,
380 YangStmtMapping.WHEN, YangStmtMapping.DESCRIPTION, YangStmtMapping.REFERENCE, YangStmtMapping.STATUS);
382 private static boolean needToCopyByAugment(final StmtContext<?, ?, ?> stmtContext) {
383 return !NOCOPY_DEF_SET.contains(stmtContext.getPublicDefinition());
386 private static final ImmutableSet<YangStmtMapping> REUSED_DEF_SET = ImmutableSet.of(YangStmtMapping.TYPEDEF);
388 private static boolean isReusedByAugment(final StmtContext<?, ?, ?> stmtContext) {
389 return REUSED_DEF_SET.contains(stmtContext.getPublicDefinition());
392 static boolean isSupportedAugmentTarget(final StmtContext<?, ?, ?> substatementCtx) {
394 * :TODO Substatement must be allowed augment target type e.g.
395 * Container, etc... and must not be for example grouping, identity etc.
396 * It is problem in case when more than one substatements have the same
397 * QName, for example Grouping and Container are siblings and they have
398 * the same QName. We must find the Container and the Grouping must be
399 * ignored as disallowed augment target.
401 final Collection<?> allowedAugmentTargets = substatementCtx.getFromNamespace(
402 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_AUGMENT_TARGETS);
404 // if no allowed target is returned we consider all targets allowed
405 return allowedAugmentTargets == null || allowedAugmentTargets.isEmpty()
406 || allowedAugmentTargets.contains(substatementCtx.getPublicDefinition());