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.source.StmtOrderingNamespace;
52 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
53 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
54 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
55 import org.slf4j.Logger;
56 import org.slf4j.LoggerFactory;
58 abstract class AbstractAugmentStatementSupport
59 extends BaseStatementSupport<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> {
60 private static final Logger LOG = LoggerFactory.getLogger(AbstractAugmentStatementSupport.class);
61 private static final Pattern PATH_REL_PATTERN1 = Pattern.compile("\\.\\.?\\s*/(.+)");
62 private static final Pattern PATH_REL_PATTERN2 = Pattern.compile("//.*");
64 AbstractAugmentStatementSupport() {
65 super(YangStmtMapping.AUGMENT);
69 public final SchemaNodeIdentifier parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
70 SourceException.throwIf(PATH_REL_PATTERN1.matcher(value).matches()
71 || PATH_REL_PATTERN2.matcher(value).matches(), ctx.getStatementSourceReference(),
72 "Augment argument \'%s\' is not valid, it can be only absolute path; or descendant if used in uses",
75 return ArgumentUtils.nodeIdentifierFromPath(ctx, value);
79 public final void onFullDefinitionDeclared(
80 final Mutable<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> augmentNode) {
81 if (!augmentNode.isSupportedByFeatures()) {
85 super.onFullDefinitionDeclared(augmentNode);
87 if (StmtContextUtils.isInExtensionBody(augmentNode)) {
91 final ModelActionBuilder augmentAction = augmentNode.newInferenceAction(
92 ModelProcessingPhase.EFFECTIVE_MODEL);
93 final Prerequisite<StmtContext<SchemaNodeIdentifier, AugmentStatement,
94 AugmentEffectiveStatement>> sourceCtxPrereq =
95 augmentAction.requiresCtx(augmentNode, ModelProcessingPhase.EFFECTIVE_MODEL);
96 final Prerequisite<Mutable<?, ?, EffectiveStatement<?, ?>>> target =
97 augmentAction.mutatesEffectiveCtxPath(getSearchRoot(augmentNode),
98 ChildSchemaNodeNamespace.class, augmentNode.coerceStatementArgument().getPathFromRoot());
100 augmentAction.apply(new InferenceAction() {
102 public void apply(final InferenceContext ctx) {
103 final StatementContextBase<?, ?, ?> augmentTargetCtx =
104 (StatementContextBase<?, ?, ?>) target.resolve(ctx);
105 if (!isSupportedAugmentTarget(augmentTargetCtx)
106 || StmtContextUtils.isInExtensionBody(augmentTargetCtx)) {
107 augmentNode.setIsSupportedToBuildEffective(false);
111 // We are targeting a context which is creating implicit nodes. In order to keep things consistent,
112 // we will need to circle back when creating effective statements.
113 if (augmentTargetCtx.hasImplicitParentSupport()) {
114 augmentNode.addToNs(AugmentImplicitHandlingNamespace.class, augmentNode, augmentTargetCtx);
117 final StatementContextBase<?, ?, ?> augmentSourceCtx = (StatementContextBase<?, ?, ?>) augmentNode;
118 // FIXME: this is a workaround for models which augment a node which is added via an extension
119 // which we do not handle. This needs to be reworked in terms of unknown schema nodes.
121 copyFromSourceToTarget(augmentSourceCtx, augmentTargetCtx);
122 augmentTargetCtx.addEffectiveSubstatement(augmentSourceCtx);
123 updateAugmentOrder(augmentSourceCtx);
124 } catch (final SourceException e) {
125 LOG.warn("Failed to add augmentation {} defined at {}",
126 augmentTargetCtx.getStatementSourceReference(),
127 augmentSourceCtx.getStatementSourceReference(), e);
131 private void updateAugmentOrder(final StatementContextBase<?, ?, ?> augmentSourceCtx) {
132 final Integer prev = augmentSourceCtx.getFromNamespace(StmtOrderingNamespace.class,
133 YangStmtMapping.AUGMENT);
134 final int currentOrder = prev == null ? 1 : prev + 1;
135 augmentSourceCtx.addToNs(StmtOrderingNamespace.class, YangStmtMapping.AUGMENT, currentOrder);
139 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
141 * Do not fail, if it is an uses-augment to an unknown node.
143 if (YangStmtMapping.USES == augmentNode.coerceParentContext().getPublicDefinition()) {
144 final SchemaNodeIdentifier augmentArg = augmentNode.coerceStatementArgument();
145 final Optional<StmtContext<?, ?, ?>> targetNode = ChildSchemaNodeNamespace.findNode(
146 getSearchRoot(augmentNode), augmentArg);
147 if (targetNode.isPresent() && StmtContextUtils.isUnknownStatement(targetNode.get())) {
148 augmentNode.setIsSupportedToBuildEffective(false);
149 LOG.warn("Uses-augment to unknown node {}. Augmentation has not been performed. At line: {}",
150 augmentArg, augmentNode.getStatementSourceReference());
155 throw new InferenceException(augmentNode.getStatementSourceReference(),
156 "Augment target '%s' not found", augmentNode.getStatementArgument());
162 protected final AugmentStatement createDeclared(final StmtContext<SchemaNodeIdentifier, AugmentStatement, ?> ctx,
163 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
164 return new RegularAugmentStatement(ctx, substatements);
168 protected final AugmentStatement createEmptyDeclared(
169 final StmtContext<SchemaNodeIdentifier, AugmentStatement, ?> ctx) {
170 return new EmptyAugmentStatement(ctx);
174 protected final List<? extends StmtContext<?, ?, ?>> statementsToBuild(
175 final StmtContext<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> ctx,
176 final List<? extends StmtContext<?, ?, ?>> substatements) {
177 final StatementContextBase<?, ?, ?> implicitDef = ctx.getFromNamespace(AugmentImplicitHandlingNamespace.class,
179 return implicitDef == null ? substatements : Lists.transform(substatements, subCtx -> {
180 verify(subCtx instanceof StatementContextBase);
181 return implicitDef.wrapWithImplicit((StatementContextBase<?, ?, ?>) subCtx);
186 protected final AugmentEffectiveStatement createEffective(
187 final StmtContext<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> ctx,
188 final AugmentStatement declared, final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
189 final int flags = new FlagsBuilder()
190 .setStatus(findFirstArgument(substatements, StatusEffectiveStatement.class, Status.CURRENT))
193 return new AugmentEffectiveStatementImpl(declared, flags, StmtContextUtils.getRootModuleQName(ctx),
194 substatements, ctx.getStatementSourceReference(),
195 (AugmentationSchemaNode) ctx.getOriginalCtx().map(StmtContext::buildEffective).orElse(null));
199 protected final AugmentEffectiveStatement createEmptyEffective(
200 final StmtContext<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> ctx,
201 final AugmentStatement declared) {
202 return createEffective(ctx, declared, ImmutableList.of());
205 private static StmtContext<?, ?, ?> getSearchRoot(final StmtContext<?, ?, ?> augmentContext) {
206 // Augment is in uses - we need to augment instantiated nodes in parent.
207 final StmtContext<?, ?, ?> parent = augmentContext.coerceParentContext();
208 if (YangStmtMapping.USES == parent.getPublicDefinition()) {
209 return parent.getParentContext();
214 static void copyFromSourceToTarget(final StatementContextBase<?, ?, ?> sourceCtx,
215 final StatementContextBase<?, ?, ?> targetCtx) {
216 final CopyType typeOfCopy = UsesStatement.class.equals(sourceCtx.coerceParentContext().getPublicDefinition()
217 .getDeclaredRepresentationClass()) ? CopyType.ADDED_BY_USES_AUGMENTATION
218 : CopyType.ADDED_BY_AUGMENTATION;
220 * Since Yang 1.1, if an augmentation is made conditional with a
221 * "when" statement, it is allowed to add mandatory nodes.
223 final boolean skipCheckOfMandatoryNodes = YangVersion.VERSION_1_1.equals(sourceCtx.getRootVersion())
224 && isConditionalAugmentStmt(sourceCtx);
226 final Collection<? extends Mutable<?, ?, ?>> declared = sourceCtx.mutableDeclaredSubstatements();
227 final Collection<? extends Mutable<?, ?, ?>> effective = sourceCtx.mutableEffectiveSubstatements();
228 final Collection<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
230 for (final Mutable<?, ?, ?> originalStmtCtx : declared) {
231 if (originalStmtCtx.isSupportedByFeatures()) {
232 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes);
235 for (final Mutable<?, ?, ?> originalStmtCtx : effective) {
236 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes);
239 targetCtx.addEffectiveSubstatements(buffer);
243 * Checks whether supplied statement context is conditional augment
247 * statement context to be checked
249 * @return true if supplied statement context is conditional augment
250 * statement, otherwise false
252 private static boolean isConditionalAugmentStmt(final StmtContext<?, ?, ?> ctx) {
253 return ctx.getPublicDefinition() == YangStmtMapping.AUGMENT && hasWhenSubstatement(ctx);
256 private static boolean hasWhenSubstatement(final StmtContext<?, ?, ?> ctx) {
257 return StmtContextUtils.findFirstSubstatement(ctx, WhenStatement.class) != null;
260 private static void copyStatement(final Mutable<?, ?, ?> original, final StatementContextBase<?, ?, ?> target,
261 final CopyType typeOfCopy, final Collection<Mutable<?, ?, ?>> buffer,
262 final boolean skipCheckOfMandatoryNodes) {
263 if (needToCopyByAugment(original)) {
264 validateNodeCanBeCopiedByAugment(original, target, typeOfCopy, skipCheckOfMandatoryNodes);
266 buffer.add(target.childCopyOf(original, typeOfCopy));
267 } else if (isReusedByAugment(original)) {
268 buffer.add(original);
272 private static void validateNodeCanBeCopiedByAugment(final StmtContext<?, ?, ?> sourceCtx,
273 final StatementContextBase<?, ?, ?> targetCtx, final CopyType typeOfCopy,
274 final boolean skipCheckOfMandatoryNodes) {
276 if (WhenStatement.class.equals(sourceCtx.getPublicDefinition().getDeclaredRepresentationClass())) {
280 if (!skipCheckOfMandatoryNodes && typeOfCopy == CopyType.ADDED_BY_AUGMENTATION
281 && requireCheckOfMandatoryNodes(sourceCtx, targetCtx)) {
282 checkForMandatoryNodes(sourceCtx);
285 // Data definition statements must not collide on their namespace
286 if (DataDefinitionStatement.class.isAssignableFrom(
287 sourceCtx.getPublicDefinition().getDeclaredRepresentationClass())) {
288 for (final StmtContext<?, ?, ?> subStatement : targetCtx.allSubstatements()) {
289 if (DataDefinitionStatement.class.isAssignableFrom(
290 subStatement.getPublicDefinition().getDeclaredRepresentationClass())) {
292 InferenceException.throwIf(
293 Objects.equals(sourceCtx.getStatementArgument(), subStatement.getStatementArgument()),
294 sourceCtx.getStatementSourceReference(),
295 "An augment cannot add node named '%s' because this name is already used in target",
296 sourceCtx.rawStatementArgument());
302 private static void checkForMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx) {
303 if (StmtContextUtils.isNonPresenceContainer(sourceCtx)) {
305 * We need to iterate over both declared and effective sub-statements,
306 * because a mandatory node can be:
307 * a) declared in augment body
308 * b) added to augment body also via uses of a grouping and
309 * such sub-statements are stored in effective sub-statements collection.
311 sourceCtx.allSubstatementsStream().forEach(AbstractAugmentStatementSupport::checkForMandatoryNodes);
314 InferenceException.throwIf(StmtContextUtils.isMandatoryNode(sourceCtx),
315 sourceCtx.getStatementSourceReference(),
316 "An augment cannot add node '%s' because it is mandatory and in module different than target",
317 sourceCtx.rawStatementArgument());
320 private static boolean requireCheckOfMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx,
321 Mutable<?, ?, ?> targetCtx) {
323 * If the statement argument is not QName, it cannot be mandatory
324 * statement, therefore return false and skip mandatory nodes validation
326 final Object arg = sourceCtx.getStatementArgument();
327 if (!(arg instanceof QName)) {
330 final QName sourceStmtQName = (QName) arg;
332 // RootStatementContext, for example
333 final Mutable<?, ?, ?> root = targetCtx.getRoot();
335 final Object targetArg = targetCtx.getStatementArgument();
336 Verify.verify(targetArg instanceof QName, "Argument of augment target statement must be QName, not %s",
338 final QName targetStmtQName = (QName) targetArg;
340 * If target is from another module, return true and perform mandatory nodes validation
342 if (!targetStmtQName.getModule().equals(sourceStmtQName.getModule())) {
347 * If target or one of the target's ancestors from the same namespace
348 * is a presence container
349 * or is non-mandatory choice
350 * or is non-mandatory list
351 * return false and skip mandatory nodes validation, because these nodes
352 * are not mandatory node containers according to RFC 6020 section 3.1.
354 if (StmtContextUtils.isPresenceContainer(targetCtx)
355 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.CHOICE)
356 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.LIST)) {
360 // This could be an augmentation stacked on top of a previous augmentation from the same module, which is
361 // conditional -- in which case we do not run further checks
362 if (targetCtx.getCopyHistory().getLastOperation() == CopyType.ADDED_BY_AUGMENTATION) {
363 final Optional<? extends StmtContext<?, ?, ?>> optPrevCopy = targetCtx.getPreviousCopyCtx();
364 if (optPrevCopy.isPresent()) {
365 final StmtContext<?, ?, ?> original = optPrevCopy.get();
366 final Object origArg = original.coerceStatementArgument();
367 Verify.verify(origArg instanceof QName, "Unexpected statement argument %s", origArg);
369 if (sourceStmtQName.getModule().equals(((QName) origArg).getModule())
370 && hasWhenSubstatement(getParentAugmentation(original))) {
375 } while ((targetCtx = targetCtx.getParentContext()) != root);
378 * All target node's parents belong to the same module as source node,
379 * therefore return false and skip mandatory nodes validation.
384 private static StmtContext<?, ?, ?> getParentAugmentation(final StmtContext<?, ?, ?> child) {
385 StmtContext<?, ?, ?> parent = Verify.verifyNotNull(child.getParentContext(), "Child %s has not parent", child);
386 while (parent.getPublicDefinition() != YangStmtMapping.AUGMENT) {
387 parent = Verify.verifyNotNull(parent.getParentContext(), "Failed to find augmentation parent of %s", child);
392 private static final ImmutableSet<YangStmtMapping> NOCOPY_DEF_SET = ImmutableSet.of(YangStmtMapping.USES,
393 YangStmtMapping.WHEN, YangStmtMapping.DESCRIPTION, YangStmtMapping.REFERENCE, YangStmtMapping.STATUS);
395 private static boolean needToCopyByAugment(final StmtContext<?, ?, ?> stmtContext) {
396 return !NOCOPY_DEF_SET.contains(stmtContext.getPublicDefinition());
399 private static final ImmutableSet<YangStmtMapping> REUSED_DEF_SET = ImmutableSet.of(YangStmtMapping.TYPEDEF);
401 private static boolean isReusedByAugment(final StmtContext<?, ?, ?> stmtContext) {
402 return REUSED_DEF_SET.contains(stmtContext.getPublicDefinition());
405 static boolean isSupportedAugmentTarget(final StmtContext<?, ?, ?> substatementCtx) {
407 * :TODO Substatement must be allowed augment target type e.g.
408 * Container, etc... and must not be for example grouping, identity etc.
409 * It is problem in case when more than one substatements have the same
410 * QName, for example Grouping and Container are siblings and they have
411 * the same QName. We must find the Container and the Grouping must be
412 * ignored as disallowed augment target.
414 final Collection<?> allowedAugmentTargets = substatementCtx.getFromNamespace(
415 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_AUGMENT_TARGETS);
417 // if no allowed target is returned we consider all targets allowed
418 return allowedAugmentTargets == null || allowedAugmentTargets.isEmpty()
419 || allowedAugmentTargets.contains(substatementCtx.getPublicDefinition());