2 * Copyright (c) 2020 PANTHEON.tech, 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;
11 import static com.google.common.base.Verify.verifyNotNull;
12 import static java.util.Objects.requireNonNull;
14 import com.google.common.collect.ImmutableSet;
15 import java.util.ArrayList;
16 import java.util.Collection;
17 import java.util.List;
18 import java.util.Objects;
19 import java.util.Optional;
20 import org.opendaylight.yangtools.yang.common.Empty;
21 import org.opendaylight.yangtools.yang.common.QName;
22 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
23 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
24 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentEffectiveStatement;
25 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentStatement;
26 import org.opendaylight.yangtools.yang.model.api.stmt.DataDefinitionStatement;
27 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
28 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
29 import org.opendaylight.yangtools.yang.parser.spi.SchemaTreeNamespace;
30 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
31 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
32 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
33 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
34 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
35 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
36 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
37 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
38 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
39 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
40 import org.slf4j.Logger;
41 import org.slf4j.LoggerFactory;
44 * Inference action, split out of {@link AbstractAugmentStatementSupport} for clarity and potential specialization.
46 final class AugmentInferenceAction implements InferenceAction {
47 private static final Logger LOG = LoggerFactory.getLogger(AugmentInferenceAction.class);
48 private static final ImmutableSet<YangStmtMapping> NOCOPY_DEF_SET = ImmutableSet.of(YangStmtMapping.USES,
49 YangStmtMapping.WHEN, YangStmtMapping.DESCRIPTION, YangStmtMapping.REFERENCE, YangStmtMapping.STATUS);
51 private final Mutable<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> augmentNode;
52 private final Prerequisite<Mutable<?, ?, EffectiveStatement<?, ?>>> target;
53 private final AbstractAugmentStatementSupport statementSupport;
55 AugmentInferenceAction(final AbstractAugmentStatementSupport statementSupport,
56 final Mutable<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> augmentNode,
57 final Prerequisite<Mutable<?, ?, EffectiveStatement<?, ?>>> target) {
58 this.statementSupport = requireNonNull(statementSupport);
59 this.augmentNode = requireNonNull(augmentNode);
60 this.target = requireNonNull(target);
64 public void apply(final InferenceContext ctx) {
65 if (!augmentNode.isSupportedToBuildEffective()) {
66 // We are not building effective model, hence we should not be performing any effects
70 final var augmentTargetCtx = target.resolve(ctx);
71 if (!isSupportedAugmentTarget(augmentTargetCtx)
72 || StmtContextUtils.isInExtensionBody(augmentTargetCtx)) {
73 augmentNode.setUnsupported();
77 // We are targeting a context which is creating implicit nodes. In order to keep things consistent,
78 // we will need to circle back when creating effective statements.
79 if (augmentTargetCtx.hasImplicitParentSupport()) {
80 augmentNode.addToNs(AugmentImplicitHandlingNamespace.class, Empty.value(), augmentTargetCtx);
83 copyFromSourceToTarget(augmentNode, augmentTargetCtx);
84 augmentTargetCtx.addEffectiveSubstatement(augmentNode.replicaAsChildOf(augmentTargetCtx));
88 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
90 * Do not fail, if it is an uses-augment to an unknown node.
92 if (YangStmtMapping.USES == augmentNode.coerceParentContext().publicDefinition()) {
93 final SchemaNodeIdentifier augmentArg = augmentNode.getArgument();
94 final Optional<StmtContext<?, ?, ?>> targetNode = SchemaTreeNamespace.findNode(
95 AbstractAugmentStatementSupport.getSearchRoot(augmentNode), augmentArg);
96 if (targetNode.isPresent() && StmtContextUtils.isUnknownStatement(targetNode.get())) {
97 augmentNode.setUnsupported();
98 LOG.warn("Uses-augment to unknown node {}. Augmentation has not been performed. At line: {}",
99 augmentArg, augmentNode.sourceReference());
104 throw new InferenceException(augmentNode, "Augment target '%s' not found", augmentNode.argument());
108 public void prerequisiteUnavailable(final Prerequisite<?> unavail) {
109 if (target.equals(unavail)) {
110 augmentNode.setUnsupported();
112 prerequisiteFailed(List.of(unavail));
116 private void copyFromSourceToTarget(final StmtContext<?, ?, ?> sourceCtx, final Mutable<?, ?, ?> targetCtx) {
117 final CopyType typeOfCopy = sourceCtx.coerceParentContext().producesDeclared(UsesStatement.class)
118 ? CopyType.ADDED_BY_USES_AUGMENTATION : CopyType.ADDED_BY_AUGMENTATION;
120 * Since Yang 1.1, if an augmentation is made conditional with a
121 * "when" statement, it is allowed to add mandatory nodes.
123 final boolean skipCheckOfMandatoryNodes = statementSupport.allowsMandatory(sourceCtx);
124 final boolean unsupported = !sourceCtx.isSupportedByFeatures();
126 final var declared = sourceCtx.declaredSubstatements();
127 final var effective = sourceCtx.effectiveSubstatements();
128 final var buffer = new ArrayList<Mutable<?, ?, ?>>(declared.size() + effective.size());
130 for (var originalStmtCtx : declared) {
131 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes,
132 unsupported || !originalStmtCtx.isSupportedByFeatures());
134 for (var originalStmtCtx : effective) {
135 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes, unsupported);
138 targetCtx.addEffectiveSubstatements(buffer);
141 private static void copyStatement(final StmtContext<?, ?, ?> original, final Mutable<?, ?, ?> target,
142 final CopyType typeOfCopy, final Collection<Mutable<?, ?, ?>> buffer,
143 final boolean skipCheckOfMandatoryNodes, final boolean unsupported) {
144 // We always copy statements, but if either the source statement or the augmentation which causes it are not
145 // supported to build we also mark the target as such.
146 if (!NOCOPY_DEF_SET.contains(original.publicDefinition())) {
147 validateNodeCanBeCopiedByAugment(original, target, typeOfCopy, skipCheckOfMandatoryNodes);
149 final Mutable<?, ?, ?> copy = target.childCopyOf(original, typeOfCopy);
151 copy.setUnsupported();
154 } else if (!unsupported && original.publicDefinition() == YangStmtMapping.TYPEDEF) {
155 // FIXME: what is this branch doing, really?
156 // Typedef's policy would imply a replica, hence normal target.childCopyOf(original, typeOfCopy)
158 // What does the !unsupported thing want to do?
159 buffer.add(original.replicaAsChildOf(target));
163 private static void validateNodeCanBeCopiedByAugment(final StmtContext<?, ?, ?> sourceCtx,
164 final Mutable<?, ?, ?> targetCtx, final CopyType typeOfCopy, final boolean skipCheckOfMandatoryNodes) {
165 if (!skipCheckOfMandatoryNodes && typeOfCopy == CopyType.ADDED_BY_AUGMENTATION
166 && requireCheckOfMandatoryNodes(sourceCtx, targetCtx)) {
167 checkForMandatoryNodes(sourceCtx);
170 // Data definition statements must not collide on their namespace
171 if (sourceCtx.producesDeclared(DataDefinitionStatement.class)) {
172 for (StmtContext<?, ?, ?> subStatement : targetCtx.allSubstatements()) {
173 if (subStatement.producesDeclared(DataDefinitionStatement.class)) {
174 InferenceException.throwIf(Objects.equals(sourceCtx.argument(), subStatement.argument()), sourceCtx,
175 "An augment cannot add node named '%s' because this name is already used in target",
176 sourceCtx.rawArgument());
182 private static void checkForMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx) {
183 if (StmtContextUtils.isNonPresenceContainer(sourceCtx)) {
185 * We need to iterate over both declared and effective sub-statements,
186 * because a mandatory node can be:
187 * a) declared in augment body
188 * b) added to augment body also via uses of a grouping and
189 * such sub-statements are stored in effective sub-statements collection.
191 sourceCtx.allSubstatementsStream().forEach(AugmentInferenceAction::checkForMandatoryNodes);
194 InferenceException.throwIf(StmtContextUtils.isMandatoryNode(sourceCtx), sourceCtx,
195 "An augment cannot add node '%s' because it is mandatory and in module different than target",
196 sourceCtx.rawArgument());
199 private static boolean requireCheckOfMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx,
200 Mutable<?, ?, ?> targetCtx) {
202 * If the statement argument is not QName, it cannot be mandatory
203 * statement, therefore return false and skip mandatory nodes validation
205 final Object arg = sourceCtx.argument();
206 if (!(arg instanceof QName)) {
209 final QName sourceStmtQName = (QName) arg;
211 // RootStatementContext, for example
212 final Mutable<?, ?, ?> root = targetCtx.getRoot();
214 final Object targetArg = targetCtx.argument();
215 verify(targetArg instanceof QName, "Argument of augment target statement must be QName, not %s", targetArg);
216 final QName targetStmtQName = (QName) targetArg;
218 * If target is from another module, return true and perform mandatory nodes validation
220 if (!targetStmtQName.getModule().equals(sourceStmtQName.getModule())) {
225 * If target or one of the target's ancestors from the same namespace
226 * is a presence container
227 * or is non-mandatory choice
228 * or is non-mandatory list
229 * return false and skip mandatory nodes validation, because these nodes
230 * are not mandatory node containers according to RFC 6020 section 3.1.
232 if (StmtContextUtils.isPresenceContainer(targetCtx)
233 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.CHOICE)
234 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.LIST)) {
238 // This could be an augmentation stacked on top of a previous augmentation from the same module, which is
239 // conditional -- in which case we do not run further checks
240 if (targetCtx.history().getLastOperation() == CopyType.ADDED_BY_AUGMENTATION) {
241 final Optional<? extends StmtContext<?, ?, ?>> optPrevCopy = targetCtx.getPreviousCopyCtx();
242 if (optPrevCopy.isPresent()) {
243 final StmtContext<?, ?, ?> original = optPrevCopy.get();
244 final Object origArg = original.getArgument();
245 verify(origArg instanceof QName, "Unexpected statement argument %s", origArg);
247 if (sourceStmtQName.getModule().equals(((QName) origArg).getModule())
248 && AbstractAugmentStatementSupport.hasWhenSubstatement(getParentAugmentation(original))) {
253 } while ((targetCtx = targetCtx.getParentContext()) != root);
256 * All target node's parents belong to the same module as source node,
257 * therefore return false and skip mandatory nodes validation.
262 private static StmtContext<?, ?, ?> getParentAugmentation(final StmtContext<?, ?, ?> child) {
263 StmtContext<?, ?, ?> parent = verifyNotNull(child.getParentContext(), "Child %s has not parent", child);
264 while (parent.publicDefinition() != YangStmtMapping.AUGMENT) {
265 parent = verifyNotNull(parent.getParentContext(), "Failed to find augmentation parent of %s", child);
270 private static boolean isSupportedAugmentTarget(final StmtContext<?, ?, ?> substatementCtx) {
272 * :TODO Substatement must be allowed augment target type e.g.
273 * Container, etc... and must not be for example grouping, identity etc.
274 * It is problem in case when more than one substatements have the same
275 * QName, for example Grouping and Container are siblings and they have
276 * the same QName. We must find the Container and the Grouping must be
277 * ignored as disallowed augment target.
279 final Collection<?> allowedAugmentTargets = substatementCtx.getFromNamespace(
280 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_AUGMENT_TARGETS);
282 // if no allowed target is returned we consider all targets allowed
283 return allowedAugmentTargets == null || allowedAugmentTargets.isEmpty()
284 || allowedAugmentTargets.contains(substatementCtx.publicDefinition());