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.Objects;
18 import java.util.Optional;
19 import org.opendaylight.yangtools.yang.common.QName;
20 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
21 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
22 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentEffectiveStatement;
23 import org.opendaylight.yangtools.yang.model.api.stmt.AugmentStatement;
24 import org.opendaylight.yangtools.yang.model.api.stmt.DataDefinitionStatement;
25 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
26 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
27 import org.opendaylight.yangtools.yang.parser.spi.SchemaTreeNamespace;
28 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
29 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
30 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
31 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
32 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
33 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
34 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
35 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
36 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
37 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
38 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
39 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
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);
50 private static final ImmutableSet<YangStmtMapping> REUSED_DEF_SET = ImmutableSet.of(YangStmtMapping.TYPEDEF);
52 private final Mutable<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> augmentNode;
53 private final Prerequisite<Mutable<?, ?, EffectiveStatement<?, ?>>> target;
54 private final AbstractAugmentStatementSupport statementSupport;
56 AugmentInferenceAction(final AbstractAugmentStatementSupport statementSupport,
57 final Mutable<SchemaNodeIdentifier, AugmentStatement, AugmentEffectiveStatement> augmentNode,
58 final Prerequisite<Mutable<?, ?, EffectiveStatement<?, ?>>> target) {
59 this.statementSupport = requireNonNull(statementSupport);
60 this.augmentNode = requireNonNull(augmentNode);
61 this.target = requireNonNull(target);
65 public void apply(final InferenceContext ctx) {
66 final StatementContextBase<?, ?, ?> augmentTargetCtx = (StatementContextBase<?, ?, ?>) target.resolve(ctx);
67 if (!isSupportedAugmentTarget(augmentTargetCtx)
68 || StmtContextUtils.isInExtensionBody(augmentTargetCtx)) {
69 augmentNode.setIsSupportedToBuildEffective(false);
73 // We are targeting a context which is creating implicit nodes. In order to keep things consistent,
74 // we will need to circle back when creating effective statements.
75 if (augmentTargetCtx.hasImplicitParentSupport()) {
76 augmentNode.addToNs(AugmentImplicitHandlingNamespace.class, augmentNode, augmentTargetCtx);
79 final StatementContextBase<?, ?, ?> augmentSourceCtx = (StatementContextBase<?, ?, ?>) augmentNode;
80 // FIXME: this is a workaround for models which augment a node which is added via an extension
81 // which we do not handle. This needs to be reworked in terms of unknown schema nodes.
83 copyFromSourceToTarget(augmentSourceCtx, augmentTargetCtx);
84 augmentTargetCtx.addEffectiveSubstatement(augmentSourceCtx);
85 } catch (final SourceException e) {
86 LOG.warn("Failed to add augmentation {} defined at {}", augmentTargetCtx.sourceReference(),
87 augmentSourceCtx.sourceReference(), e);
92 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
94 * Do not fail, if it is an uses-augment to an unknown node.
96 if (YangStmtMapping.USES == augmentNode.coerceParentContext().publicDefinition()) {
97 final SchemaNodeIdentifier augmentArg = augmentNode.getArgument();
98 final Optional<StmtContext<?, ?, ?>> targetNode = SchemaTreeNamespace.findNode(
99 AbstractAugmentStatementSupport.getSearchRoot(augmentNode), augmentArg);
100 if (targetNode.isPresent() && StmtContextUtils.isUnknownStatement(targetNode.get())) {
101 augmentNode.setIsSupportedToBuildEffective(false);
102 LOG.warn("Uses-augment to unknown node {}. Augmentation has not been performed. At line: {}",
103 augmentArg, augmentNode.sourceReference());
108 throw new InferenceException(augmentNode.sourceReference(), "Augment target '%s' not found",
109 augmentNode.argument());
112 private void copyFromSourceToTarget(final StatementContextBase<?, ?, ?> sourceCtx,
113 final StatementContextBase<?, ?, ?> targetCtx) {
114 final CopyType typeOfCopy = sourceCtx.coerceParentContext().producesDeclared(UsesStatement.class)
115 ? CopyType.ADDED_BY_USES_AUGMENTATION : CopyType.ADDED_BY_AUGMENTATION;
117 * Since Yang 1.1, if an augmentation is made conditional with a
118 * "when" statement, it is allowed to add mandatory nodes.
120 final boolean skipCheckOfMandatoryNodes = statementSupport.allowsMandatory(sourceCtx);
121 final boolean unsupported = !sourceCtx.isSupportedByFeatures();
123 final Collection<? extends Mutable<?, ?, ?>> declared = sourceCtx.mutableDeclaredSubstatements();
124 final Collection<? extends Mutable<?, ?, ?>> effective = sourceCtx.mutableEffectiveSubstatements();
125 final Collection<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
127 for (final Mutable<?, ?, ?> originalStmtCtx : declared) {
128 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes,
129 unsupported || !originalStmtCtx.isSupportedByFeatures());
131 for (final Mutable<?, ?, ?> originalStmtCtx : effective) {
132 copyStatement(originalStmtCtx, targetCtx, typeOfCopy, buffer, skipCheckOfMandatoryNodes, unsupported);
135 targetCtx.addEffectiveSubstatements(buffer);
138 private static void copyStatement(final Mutable<?, ?, ?> original, final StatementContextBase<?, ?, ?> target,
139 final CopyType typeOfCopy, final Collection<Mutable<?, ?, ?>> buffer,
140 final boolean skipCheckOfMandatoryNodes, final boolean unsupported) {
141 // We always copy statements, but if either the source statement or the augmentation which causes it are not
142 // supported to build we also mark the target as such.
143 if (needToCopyByAugment(original)) {
144 validateNodeCanBeCopiedByAugment(original, target, typeOfCopy, skipCheckOfMandatoryNodes);
146 final Mutable<?, ?, ?> copy = target.childCopyOf(original, typeOfCopy);
148 copy.setIsSupportedToBuildEffective(false);
151 } else if (isReusedByAugment(original) && !unsupported) {
152 buffer.add(original);
156 private static void validateNodeCanBeCopiedByAugment(final StmtContext<?, ?, ?> sourceCtx,
157 final StatementContextBase<?, ?, ?> targetCtx, final CopyType typeOfCopy,
158 final boolean skipCheckOfMandatoryNodes) {
159 if (!skipCheckOfMandatoryNodes && typeOfCopy == CopyType.ADDED_BY_AUGMENTATION
160 && requireCheckOfMandatoryNodes(sourceCtx, targetCtx)) {
161 checkForMandatoryNodes(sourceCtx);
164 // Data definition statements must not collide on their namespace
165 if (sourceCtx.producesDeclared(DataDefinitionStatement.class)) {
166 for (final StmtContext<?, ?, ?> subStatement : targetCtx.allSubstatements()) {
167 if (subStatement.producesDeclared(DataDefinitionStatement.class)) {
168 InferenceException.throwIf(Objects.equals(sourceCtx.argument(), subStatement.argument()),
169 sourceCtx.sourceReference(),
170 "An augment cannot add node named '%s' because this name is already used in target",
171 sourceCtx.rawArgument());
177 private static void checkForMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx) {
178 if (StmtContextUtils.isNonPresenceContainer(sourceCtx)) {
180 * We need to iterate over both declared and effective sub-statements,
181 * because a mandatory node can be:
182 * a) declared in augment body
183 * b) added to augment body also via uses of a grouping and
184 * such sub-statements are stored in effective sub-statements collection.
186 sourceCtx.allSubstatementsStream().forEach(AugmentInferenceAction::checkForMandatoryNodes);
189 InferenceException.throwIf(StmtContextUtils.isMandatoryNode(sourceCtx), sourceCtx.sourceReference(),
190 "An augment cannot add node '%s' because it is mandatory and in module different than target",
191 sourceCtx.rawArgument());
194 private static boolean requireCheckOfMandatoryNodes(final StmtContext<?, ?, ?> sourceCtx,
195 Mutable<?, ?, ?> targetCtx) {
197 * If the statement argument is not QName, it cannot be mandatory
198 * statement, therefore return false and skip mandatory nodes validation
200 final Object arg = sourceCtx.argument();
201 if (!(arg instanceof QName)) {
204 final QName sourceStmtQName = (QName) arg;
206 // RootStatementContext, for example
207 final Mutable<?, ?, ?> root = targetCtx.getRoot();
209 final Object targetArg = targetCtx.argument();
210 verify(targetArg instanceof QName, "Argument of augment target statement must be QName, not %s", targetArg);
211 final QName targetStmtQName = (QName) targetArg;
213 * If target is from another module, return true and perform mandatory nodes validation
215 if (!targetStmtQName.getModule().equals(sourceStmtQName.getModule())) {
220 * If target or one of the target's ancestors from the same namespace
221 * is a presence container
222 * or is non-mandatory choice
223 * or is non-mandatory list
224 * return false and skip mandatory nodes validation, because these nodes
225 * are not mandatory node containers according to RFC 6020 section 3.1.
227 if (StmtContextUtils.isPresenceContainer(targetCtx)
228 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.CHOICE)
229 || StmtContextUtils.isNotMandatoryNodeOfType(targetCtx, YangStmtMapping.LIST)) {
233 // This could be an augmentation stacked on top of a previous augmentation from the same module, which is
234 // conditional -- in which case we do not run further checks
235 if (targetCtx.getCopyHistory().getLastOperation() == CopyType.ADDED_BY_AUGMENTATION) {
236 final Optional<? extends StmtContext<?, ?, ?>> optPrevCopy = targetCtx.getPreviousCopyCtx();
237 if (optPrevCopy.isPresent()) {
238 final StmtContext<?, ?, ?> original = optPrevCopy.get();
239 final Object origArg = original.getArgument();
240 verify(origArg instanceof QName, "Unexpected statement argument %s", origArg);
242 if (sourceStmtQName.getModule().equals(((QName) origArg).getModule())
243 && AbstractAugmentStatementSupport.hasWhenSubstatement(getParentAugmentation(original))) {
248 } while ((targetCtx = targetCtx.getParentContext()) != root);
251 * All target node's parents belong to the same module as source node,
252 * therefore return false and skip mandatory nodes validation.
257 private static StmtContext<?, ?, ?> getParentAugmentation(final StmtContext<?, ?, ?> child) {
258 StmtContext<?, ?, ?> parent = verifyNotNull(child.getParentContext(), "Child %s has not parent", child);
259 while (parent.publicDefinition() != YangStmtMapping.AUGMENT) {
260 parent = verifyNotNull(parent.getParentContext(), "Failed to find augmentation parent of %s", child);
265 private static boolean needToCopyByAugment(final StmtContext<?, ?, ?> stmtContext) {
266 return !NOCOPY_DEF_SET.contains(stmtContext.publicDefinition());
269 private static boolean isReusedByAugment(final StmtContext<?, ?, ?> stmtContext) {
270 return REUSED_DEF_SET.contains(stmtContext.publicDefinition());
273 private static boolean isSupportedAugmentTarget(final StmtContext<?, ?, ?> substatementCtx) {
275 * :TODO Substatement must be allowed augment target type e.g.
276 * Container, etc... and must not be for example grouping, identity etc.
277 * It is problem in case when more than one substatements have the same
278 * QName, for example Grouping and Container are siblings and they have
279 * the same QName. We must find the Container and the Grouping must be
280 * ignored as disallowed augment target.
282 final Collection<?> allowedAugmentTargets = substatementCtx.getFromNamespace(
283 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_AUGMENT_TARGETS);
285 // if no allowed target is returned we consider all targets allowed
286 return allowedAugmentTargets == null || allowedAugmentTargets.isEmpty()
287 || allowedAugmentTargets.contains(substatementCtx.publicDefinition());