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.model.api.AugmentationSchemaNode;
24 import org.opendaylight.yangtools.yang.model.api.Status;
25 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
26 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
27 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
28 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentEffectiveStatement;
29 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentStatement;
30 import org.opendaylight.yangtools.yang.model.api.stmt.DataDefinitionStatement;
31 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
32 import org.opendaylight.yangtools.yang.model.api.stmt.StatusEffectiveStatement;
33 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
34 import org.opendaylight.yangtools.yang.model.api.stmt.WhenEffectiveStatement;
35 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.ArgumentUtils;
36 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
37 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.EffectiveStatementMixins.EffectiveStatementWithFlags.FlagsBuilder;
38 import org.opendaylight.yangtools.yang.parser.spi.SchemaTreeNamespace;
39 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
40 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
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.sourceReference(),
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()) {
81 // We need this augment node to be present, but it should not escape to effective world
82 augmentNode.setIsSupportedToBuildEffective(false);
85 super.onFullDefinitionDeclared(augmentNode);
87 if (StmtContextUtils.isInExtensionBody(augmentNode)) {
91 final ModelActionBuilder augmentAction = augmentNode.newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
92 augmentAction.requiresCtx(augmentNode, ModelProcessingPhase.EFFECTIVE_MODEL);
93 final Prerequisite<Mutable<?, ?, EffectiveStatement<?, ?>>> target = augmentAction.mutatesEffectiveCtxPath(
94 getSearchRoot(augmentNode), SchemaTreeNamespace.class, augmentNode.getArgument().getNodeIdentifiers());
96 augmentAction.apply(new InferenceAction() {
98 public void apply(final InferenceContext ctx) {
99 final StatementContextBase<?, ?, ?> augmentTargetCtx =
100 (StatementContextBase<?, ?, ?>) target.resolve(ctx);
101 if (!isSupportedAugmentTarget(augmentTargetCtx)
102 || StmtContextUtils.isInExtensionBody(augmentTargetCtx)) {
103 augmentNode.setIsSupportedToBuildEffective(false);
107 // We are targeting a context which is creating implicit nodes. In order to keep things consistent,
108 // we will need to circle back when creating effective statements.
109 if (augmentTargetCtx.hasImplicitParentSupport()) {
110 augmentNode.addToNs(AugmentImplicitHandlingNamespace.class, augmentNode, augmentTargetCtx);
113 final StatementContextBase<?, ?, ?> augmentSourceCtx = (StatementContextBase<?, ?, ?>) augmentNode;
114 // FIXME: this is a workaround for models which augment a node which is added via an extension
115 // which we do not handle. This needs to be reworked in terms of unknown schema nodes.
117 copyFromSourceToTarget(augmentSourceCtx, augmentTargetCtx);
118 augmentTargetCtx.addEffectiveSubstatement(augmentSourceCtx);
119 } catch (final SourceException e) {
120 LOG.warn("Failed to add augmentation {} defined at {}", augmentTargetCtx.sourceReference(),
121 augmentSourceCtx.sourceReference(), e);
126 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
128 * Do not fail, if it is an uses-augment to an unknown node.
130 if (YangStmtMapping.USES == augmentNode.coerceParentContext().publicDefinition()) {
131 final SchemaNodeIdentifier augmentArg = augmentNode.getArgument();
132 final Optional<StmtContext<?, ?, ?>> targetNode = SchemaTreeNamespace.findNode(
133 getSearchRoot(augmentNode), augmentArg);
134 if (targetNode.isPresent() && StmtContextUtils.isUnknownStatement(targetNode.get())) {
135 augmentNode.setIsSupportedToBuildEffective(false);
136 LOG.warn("Uses-augment to unknown node {}. Augmentation has not been performed. At line: {}",
137 augmentArg, augmentNode.sourceReference());
142 throw new InferenceException(augmentNode.sourceReference(), "Augment target '%s' not found",
143 augmentNode.argument());
149 protected final AugmentStatement createDeclared(final StmtContext<SchemaNodeIdentifier, AugmentStatement, ?> ctx,
150 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
151 return new RegularAugmentStatement(ctx.getRawArgument(), ctx.getArgument(), substatements);
155 protected final AugmentStatement createEmptyDeclared(
156 final StmtContext<SchemaNodeIdentifier, AugmentStatement, ?> ctx) {
157 return new EmptyAugmentStatement(ctx.getRawArgument(), ctx.getArgument());
161 protected final List<? extends StmtContext<?, ?, ?>> statementsToBuild(
162 final Current<SchemaNodeIdentifier, AugmentStatement> stmt,
163 final List<? extends StmtContext<?, ?, ?>> substatements) {
164 // Pick up the marker left by onFullDefinitionDeclared() inference action. If it is present we need to pass our
165 // children through target's implicit wrapping.
166 final StatementContextBase<?, ?, ?> implicitDef = stmt.getFromNamespace(AugmentImplicitHandlingNamespace.class,
168 return implicitDef == null ? substatements : Lists.transform(substatements, subCtx -> {
169 verify(subCtx instanceof StatementContextBase);
170 return implicitDef.wrapWithImplicit((StatementContextBase<?, ?, ?>) subCtx);
175 protected final AugmentEffectiveStatement createEffective(
176 final Current<SchemaNodeIdentifier, AugmentStatement> stmt,
177 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
178 final int flags = new FlagsBuilder()
179 .setStatus(findFirstArgument(substatements, StatusEffectiveStatement.class, Status.CURRENT))
182 return new AugmentEffectiveStatementImpl(stmt.declared(), stmt.getArgument(), flags,
183 StmtContextUtils.getRootModuleQName(stmt.caerbannog()), substatements, stmt.sourceReference(),
184 (AugmentationSchemaNode) stmt.original());
187 private static StmtContext<?, ?, ?> getSearchRoot(final StmtContext<?, ?, ?> augmentContext) {
188 // Augment is in uses - we need to augment instantiated nodes in parent.
189 final StmtContext<?, ?, ?> parent = augmentContext.coerceParentContext();
190 if (YangStmtMapping.USES == parent.publicDefinition()) {
191 return parent.getParentContext();
196 final void copyFromSourceToTarget(final StatementContextBase<?, ?, ?> sourceCtx,
197 final StatementContextBase<?, ?, ?> targetCtx) {
198 final CopyType typeOfCopy = sourceCtx.coerceParentContext().producesDeclared(UsesStatement.class)
199 ? CopyType.ADDED_BY_USES_AUGMENTATION : CopyType.ADDED_BY_AUGMENTATION;
201 * Since Yang 1.1, if an augmentation is made conditional with a
202 * "when" statement, it is allowed to add mandatory nodes.
204 final boolean skipCheckOfMandatoryNodes = allowsMandatory(sourceCtx);
205 final boolean unsupported = !sourceCtx.isSupportedByFeatures();
207 final Collection<? extends Mutable<?, ?, ?>> declared = sourceCtx.mutableDeclaredSubstatements();
208 final Collection<? extends Mutable<?, ?, ?>> effective = sourceCtx.mutableEffectiveSubstatements();
209 final Collection<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
211 for (final Mutable<?, ?, ?> originalStmtCtx : declared) {
212 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes,
213 unsupported || !originalStmtCtx.isSupportedByFeatures());
215 for (final Mutable<?, ?, ?> originalStmtCtx : effective) {
216 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes, unsupported);
219 targetCtx.addEffectiveSubstatements(buffer);
222 abstract boolean allowsMandatory(StmtContext<?, ?, ?> ctx);
224 static boolean hasWhenSubstatement(final StmtContext<?, ?, ?> ctx) {
225 return ctx.hasSubstatement(WhenEffectiveStatement.class);
228 private static void copyStatement(final Mutable<?, ?, ?> original, final StatementContextBase<?, ?, ?> target,
229 final CopyType typeOfCopy, final Collection<Mutable<?, ?, ?>> buffer,
230 final boolean skipCheckOfMandatoryNodes, final boolean unsupported) {
231 // We always copy statements, but if either the source statement or the augmentation which causes it are not
232 // supported to build we also mark the target as such.
233 if (needToCopyByAugment(original)) {
234 validateNodeCanBeCopiedByAugment(original, target, typeOfCopy, skipCheckOfMandatoryNodes);
236 final Mutable<?, ?, ?> copy = target.childCopyOf(original, typeOfCopy);
238 copy.setIsSupportedToBuildEffective(false);
241 } else if (isReusedByAugment(original) && !unsupported) {
242 buffer.add(original);
246 private static void validateNodeCanBeCopiedByAugment(final StmtContext<?, ?, ?> sourceCtx,
247 final StatementContextBase<?, ?, ?> targetCtx, final CopyType typeOfCopy,
248 final boolean skipCheckOfMandatoryNodes) {
249 if (!skipCheckOfMandatoryNodes && typeOfCopy == CopyType.ADDED_BY_AUGMENTATION
250 && requireCheckOfMandatoryNodes(sourceCtx, targetCtx)) {
251 checkForMandatoryNodes(sourceCtx);
254 // Data definition statements must not collide on their namespace
255 if (sourceCtx.producesDeclared(DataDefinitionStatement.class)) {
256 for (final StmtContext<?, ?, ?> subStatement : targetCtx.allSubstatements()) {
257 if (subStatement.producesDeclared(DataDefinitionStatement.class)) {
258 InferenceException.throwIf(Objects.equals(sourceCtx.argument(), subStatement.argument()),
259 sourceCtx.sourceReference(),
260 "An augment cannot add node named '%s' because this name is already used in target",
261 sourceCtx.rawArgument());
267 private static void checkForMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx) {
268 if (StmtContextUtils.isNonPresenceContainer(sourceCtx)) {
270 * We need to iterate over both declared and effective sub-statements,
271 * because a mandatory node can be:
272 * a) declared in augment body
273 * b) added to augment body also via uses of a grouping and
274 * such sub-statements are stored in effective sub-statements collection.
276 sourceCtx.allSubstatementsStream().forEach(AbstractAugmentStatementSupport::checkForMandatoryNodes);
279 InferenceException.throwIf(StmtContextUtils.isMandatoryNode(sourceCtx), sourceCtx.sourceReference(),
280 "An augment cannot add node '%s' because it is mandatory and in module different than target",
281 sourceCtx.rawArgument());
284 private static boolean requireCheckOfMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx,
285 Mutable<?, ?, ?> targetCtx) {
287 * If the statement argument is not QName, it cannot be mandatory
288 * statement, therefore return false and skip mandatory nodes validation
290 final Object arg = sourceCtx.argument();
291 if (!(arg instanceof QName)) {
294 final QName sourceStmtQName = (QName) arg;
296 // RootStatementContext, for example
297 final Mutable<?, ?, ?> root = targetCtx.getRoot();
299 final Object targetArg = targetCtx.argument();
300 verify(targetArg instanceof QName, "Argument of augment target statement must be QName, not %s", targetArg);
301 final QName targetStmtQName = (QName) targetArg;
303 * If target is from another module, return true and perform mandatory nodes validation
305 if (!targetStmtQName.getModule().equals(sourceStmtQName.getModule())) {
310 * If target or one of the target's ancestors from the same namespace
311 * is a presence container
312 * or is non-mandatory choice
313 * or is non-mandatory list
314 * return false and skip mandatory nodes validation, because these nodes
315 * are not mandatory node containers according to RFC 6020 section 3.1.
317 if (StmtContextUtils.isPresenceContainer(targetCtx)
318 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.CHOICE)
319 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.LIST)) {
323 // This could be an augmentation stacked on top of a previous augmentation from the same module, which is
324 // conditional -- in which case we do not run further checks
325 if (targetCtx.getCopyHistory().getLastOperation() == CopyType.ADDED_BY_AUGMENTATION) {
326 final Optional<? extends StmtContext<?, ?, ?>> optPrevCopy = targetCtx.getPreviousCopyCtx();
327 if (optPrevCopy.isPresent()) {
328 final StmtContext<?, ?, ?> original = optPrevCopy.get();
329 final Object origArg = original.getArgument();
330 Verify.verify(origArg instanceof QName, "Unexpected statement argument %s", origArg);
332 if (sourceStmtQName.getModule().equals(((QName) origArg).getModule())
333 && hasWhenSubstatement(getParentAugmentation(original))) {
338 } while ((targetCtx = targetCtx.getParentContext()) != root);
341 * All target node's parents belong to the same module as source node,
342 * therefore return false and skip mandatory nodes validation.
347 private static StmtContext<?, ?, ?> getParentAugmentation(final StmtContext<?, ?, ?> child) {
348 StmtContext<?, ?, ?> parent = Verify.verifyNotNull(child.getParentContext(), "Child %s has not parent", child);
349 while (parent.publicDefinition() != YangStmtMapping.AUGMENT) {
350 parent = Verify.verifyNotNull(parent.getParentContext(), "Failed to find augmentation parent of %s", child);
355 private static final ImmutableSet<YangStmtMapping> NOCOPY_DEF_SET = ImmutableSet.of(YangStmtMapping.USES,
356 YangStmtMapping.WHEN, YangStmtMapping.DESCRIPTION, YangStmtMapping.REFERENCE, YangStmtMapping.STATUS);
358 private static boolean needToCopyByAugment(final StmtContext<?, ?, ?> stmtContext) {
359 return !NOCOPY_DEF_SET.contains(stmtContext.publicDefinition());
362 private static final ImmutableSet<YangStmtMapping> REUSED_DEF_SET = ImmutableSet.of(YangStmtMapping.TYPEDEF);
364 private static boolean isReusedByAugment(final StmtContext<?, ?, ?> stmtContext) {
365 return REUSED_DEF_SET.contains(stmtContext.publicDefinition());
368 static boolean isSupportedAugmentTarget(final StmtContext<?, ?, ?> substatementCtx) {
370 * :TODO Substatement must be allowed augment target type e.g.
371 * Container, etc... and must not be for example grouping, identity etc.
372 * It is problem in case when more than one substatements have the same
373 * QName, for example Grouping and Container are siblings and they have
374 * the same QName. We must find the Container and the Grouping must be
375 * ignored as disallowed augment target.
377 final Collection<?> allowedAugmentTargets = substatementCtx.getFromNamespace(
378 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_AUGMENT_TARGETS);
380 // if no allowed target is returned we consider all targets allowed
381 return allowedAugmentTargets == null || allowedAugmentTargets.isEmpty()
382 || allowedAugmentTargets.contains(substatementCtx.publicDefinition());