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.uses;
10 import static com.google.common.base.Verify.verify;
11 import static com.google.common.base.Verify.verifyNotNull;
13 import com.google.common.collect.ImmutableList;
14 import com.google.common.collect.ImmutableMap;
15 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
16 import java.util.ArrayList;
17 import java.util.Collection;
18 import java.util.LinkedHashMap;
20 import java.util.Optional;
21 import org.eclipse.jdt.annotation.NonNull;
22 import org.opendaylight.yangtools.yang.common.Empty;
23 import org.opendaylight.yangtools.yang.common.QName;
24 import org.opendaylight.yangtools.yang.common.QNameModule;
25 import org.opendaylight.yangtools.yang.common.YangVersion;
26 import org.opendaylight.yangtools.yang.model.api.GroupingDefinition;
27 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
28 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
29 import org.opendaylight.yangtools.yang.model.api.meta.DeclarationReference;
30 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
31 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
32 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
33 import org.opendaylight.yangtools.yang.model.api.stmt.RefineEffectiveStatement;
34 import org.opendaylight.yangtools.yang.model.api.stmt.RefineStatement;
35 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
36 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Descendant;
37 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaTreeEffectiveStatement;
38 import org.opendaylight.yangtools.yang.model.api.stmt.UsesEffectiveStatement;
39 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
40 import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatementDecorators;
41 import org.opendaylight.yangtools.yang.model.ri.stmt.DeclaredStatements;
42 import org.opendaylight.yangtools.yang.model.spi.meta.EffectiveStatementMixins;
43 import org.opendaylight.yangtools.yang.parser.api.YangParserConfiguration;
44 import org.opendaylight.yangtools.yang.parser.rfc7950.reactor.YangValidationBundles;
45 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.refine.RefineEffectiveStatementImpl;
46 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.refine.RefineTargetNamespace;
47 import org.opendaylight.yangtools.yang.parser.spi.GroupingNamespace;
48 import org.opendaylight.yangtools.yang.parser.spi.SchemaTreeNamespace;
49 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractQNameStatementSupport;
50 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
51 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
52 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
53 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
54 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
55 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
56 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
57 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
58 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
59 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
60 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
61 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
62 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToModuleQName;
63 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
64 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
65 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
66 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
67 import org.slf4j.Logger;
68 import org.slf4j.LoggerFactory;
70 public final class UsesStatementSupport
71 extends AbstractQNameStatementSupport<UsesStatement, UsesEffectiveStatement> {
72 private static final Logger LOG = LoggerFactory.getLogger(UsesStatementSupport.class);
73 private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
75 .addAny(YangStmtMapping.AUGMENT)
76 .addOptional(YangStmtMapping.DESCRIPTION)
77 .addAny(YangStmtMapping.IF_FEATURE)
78 .addAny(YangStmtMapping.REFINE)
79 .addOptional(YangStmtMapping.REFERENCE)
80 .addOptional(YangStmtMapping.STATUS)
81 .addOptional(YangStmtMapping.WHEN)
84 public UsesStatementSupport(final YangParserConfiguration config) {
85 super(YangStmtMapping.USES, StatementPolicy.exactReplica(), config);
89 public QName parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
90 return StmtContextUtils.parseNodeIdentifier(ctx, value);
94 public void onFullDefinitionDeclared(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
95 if (!usesNode.isSupportedByFeatures()) {
98 super.onFullDefinitionDeclared(usesNode);
100 final ModelActionBuilder usesAction = usesNode.newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
101 final QName groupingName = usesNode.argument();
103 final Prerequisite<StmtContext<?, ?, ?>> sourceGroupingPre = usesAction.requiresCtx(usesNode,
104 GroupingNamespace.class, groupingName, ModelProcessingPhase.EFFECTIVE_MODEL);
105 final Prerequisite<? extends StmtContext.Mutable<?, ?, ?>> targetNodePre = usesAction.mutatesEffectiveCtx(
106 usesNode.getParentContext());
108 usesAction.apply(new InferenceAction() {
111 public void apply(final InferenceContext ctx) {
112 final StatementContextBase<?, ?, ?> targetNodeStmtCtx =
113 (StatementContextBase<?, ?, ?>) targetNodePre.resolve(ctx);
114 final StatementContextBase<?, ?, ?> sourceGrpStmtCtx =
115 (StatementContextBase<?, ?, ?>) sourceGroupingPre.resolve(ctx);
117 copyFromSourceToTarget(sourceGrpStmtCtx, targetNodeStmtCtx, usesNode);
118 resolveUsesNode(usesNode, targetNodeStmtCtx);
119 StmtContextUtils.validateIfFeatureAndWhenOnListKeys(usesNode);
120 usesNode.addToNs(SourceGroupingNamespace.class, Empty.getInstance(), sourceGrpStmtCtx);
124 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
125 InferenceException.throwIf(failed.contains(sourceGroupingPre), usesNode,
126 "Grouping '%s' was not resolved.", groupingName);
127 throw new InferenceException("Unknown error occurred.", usesNode);
133 protected SubstatementValidator getSubstatementValidator() {
134 return SUBSTATEMENT_VALIDATOR;
138 protected UsesStatement createDeclared(final StmtContext<QName, UsesStatement, ?> ctx,
139 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
140 return DeclaredStatements.createUses(ctx.getRawArgument(), ctx.getArgument(), substatements);
144 protected UsesStatement attachDeclarationReference(final UsesStatement stmt, final DeclarationReference reference) {
145 return DeclaredStatementDecorators.decorateUses(stmt, reference);
149 protected UsesEffectiveStatement createEffective(final Current<QName, UsesStatement> stmt,
150 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
151 final EffectiveStatement<?, ?> source =
152 verifyNotNull(stmt.getFromNamespace(SourceGroupingNamespace.class, Empty.getInstance())).buildEffective();
153 verify(source instanceof GroupingDefinition, "Unexpected source %s", source);
154 final GroupingDefinition sourceGrouping = (GroupingDefinition) source;
156 final int flags = EffectiveStatementMixins.historyAndStatusFlags(stmt.history(), substatements);
157 final QName argument = stmt.getArgument();
158 final UsesStatement declared = stmt.declared();
160 if (substatements.isEmpty()) {
161 return argument.equals(declared.argument())
162 ? new EmptyLocalUsesEffectiveStatement(declared, sourceGrouping, flags)
163 : new SimpleCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags);
166 if (declared.argument().equals(argument)) {
167 return new RegularLocalUsesEffectiveStatement(declared, sourceGrouping, flags, substatements);
169 if (findFirstStatement(substatements, RefineEffectiveStatement.class) == null) {
170 return new SimpleCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags, substatements);
172 return new FullCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags, substatements);
175 static @NonNull ImmutableMap<Descendant, SchemaNode> indexRefines(
176 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
177 final Map<Descendant, SchemaNode> refines = new LinkedHashMap<>();
179 for (EffectiveStatement<?, ?> effectiveStatement : substatements) {
180 if (effectiveStatement instanceof RefineEffectiveStatementImpl) {
181 final RefineEffectiveStatementImpl refineStmt = (RefineEffectiveStatementImpl) effectiveStatement;
182 refines.put(refineStmt.argument(), refineStmt.getRefineTargetNode());
186 return ImmutableMap.copyOf(refines);
190 * Copy statements from a grouping to a target node.
192 * @param sourceGrpStmtCtx
193 * source grouping statement context
198 * @throws SourceException
199 * instance of SourceException
201 @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
202 justification = "https://github.com/spotbugs/spotbugs/issues/811")
203 private static void copyFromSourceToTarget(final Mutable<?, ?, ?> sourceGrpStmtCtx,
204 final StatementContextBase<?, ?, ?> targetCtx,
205 final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
206 final Collection<? extends Mutable<?, ?, ?>> declared = sourceGrpStmtCtx.mutableDeclaredSubstatements();
207 final Collection<? extends Mutable<?, ?, ?>> effective = sourceGrpStmtCtx.mutableEffectiveSubstatements();
208 final Collection<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
209 final QNameModule newQNameModule = getNewQNameModule(targetCtx, sourceGrpStmtCtx);
211 for (final Mutable<?, ?, ?> original : declared) {
212 if (original.isSupportedByFeatures() && shouldCopy(original)) {
213 original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, newQNameModule).ifPresent(buffer::add);
217 for (final Mutable<?, ?, ?> original : effective) {
218 if (shouldCopy(original)) {
219 original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, newQNameModule).ifPresent(buffer::add);
223 targetCtx.addEffectiveSubstatements(buffer);
224 usesNode.addAsEffectOfStatement(buffer);
227 private static boolean shouldCopy(final StmtContext<?, ?, ?> stmt) {
228 // https://tools.ietf.org/html/rfc7950#section-7.13:
230 // The effect of a "uses" reference to a grouping is that the nodes
231 // defined by the grouping are copied into the current schema tree and
232 // are then updated according to the "refine" and "augment" statements.
234 // This means that the statement that is about to be copied (and can be subjected to buildEffective() I think)
235 // is actually a SchemaTreeEffectiveStatement
236 if (SchemaTreeEffectiveStatement.class.isAssignableFrom(
237 stmt.publicDefinition().getEffectiveRepresentationClass())) {
241 // As per https://tools.ietf.org/html/rfc7950#section-7.13.2:
243 // o Any node can get refined extensions, if the extension allows
244 // refinement. See Section 7.19 for details.
246 // and https://tools.ietf.org/html/rfc7950#section-7.19:
248 // An extension can allow refinement (see Section 7.13.2) and deviations
249 // (Section 7.20.3.2), but the mechanism for how this is defined is
250 // outside the scope of this specification.
252 // This is actively used out there (tailf-common.yang's tailf:action), which is incorrect, though. They do
253 // publish a bunch of metadata (through tailf-meta-extension.yang), but fail to publish a key aspect of the
254 // statement: it attaches to schema tree namespace (just as RFC7950 action does). Such an extension would
255 // automatically result in the extension being picked up by the above check and everybody would live happily
258 // We do not live in that world yet, hence we do the following and keep our fingers crossed.
259 // FIXME: YANGTOOLS-403: this should not be necessary once we implement the above (although tests will complain)
260 return StmtContextUtils.isUnknownStatement(stmt);
263 private static QNameModule getNewQNameModule(final StmtContext<?, ?, ?> targetCtx,
264 final StmtContext<?, ?, ?> stmtContext) {
265 if (targetCtx.getParentContext() == null) {
266 return targetCtx.getFromNamespace(ModuleCtxToModuleQName.class, targetCtx);
268 if (targetCtx.publicDefinition() == YangStmtMapping.AUGMENT) {
269 return StmtContextUtils.getRootModuleQName(targetCtx);
272 final Object targetStmtArgument = targetCtx.argument();
273 final Object sourceStmtArgument = stmtContext.argument();
274 if (targetStmtArgument instanceof QName && sourceStmtArgument instanceof QName) {
275 return ((QName) targetStmtArgument).getModule();
281 @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
282 justification = "https://github.com/spotbugs/spotbugs/issues/811")
283 private static void resolveUsesNode(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode,
284 final StmtContext<?, ?, ?> targetNodeStmtCtx) {
285 for (final Mutable<?, ?, ?> subStmtCtx : usesNode.mutableDeclaredSubstatements()) {
286 if (subStmtCtx.producesDeclared(RefineStatement.class) && areFeaturesSupported(subStmtCtx)) {
287 performRefine(subStmtCtx, targetNodeStmtCtx);
292 private static boolean areFeaturesSupported(final StmtContext<?, ?, ?> subStmtCtx) {
294 * In case of Yang 1.1, checks whether features are supported.
296 return !YangVersion.VERSION_1_1.equals(subStmtCtx.yangVersion()) || subStmtCtx.isSupportedByFeatures();
299 private static void performRefine(final Mutable<?, ?, ?> subStmtCtx, final StmtContext<?, ?, ?> usesParentCtx) {
300 final Object refineArgument = subStmtCtx.argument();
301 InferenceException.throwIf(!(refineArgument instanceof SchemaNodeIdentifier), subStmtCtx,
302 "Invalid refine argument %s. It must be instance of SchemaNodeIdentifier.", refineArgument);
304 final Optional<StmtContext<?, ?, ?>> optRefineTargetCtx = SchemaTreeNamespace.findNode(
305 usesParentCtx, (SchemaNodeIdentifier) refineArgument);
306 InferenceException.throwIf(!optRefineTargetCtx.isPresent(), subStmtCtx, "Refine target node %s not found.",
309 // FIXME: This communicates the looked-up target node to RefineStatementSupport.buildEffective(). We should do
310 // this trick through a shared namespace or similar reactor-agnostic meeting place. It really feels like
311 // an inference action RefineStatementSupport should be doing.
312 final StmtContext<?, ?, ?> refineTargetNodeCtx = optRefineTargetCtx.get();
313 if (StmtContextUtils.isUnknownStatement(refineTargetNodeCtx)) {
314 LOG.trace("Refine node '{}' in uses '{}' has target node unknown statement '{}'. "
315 + "Refine has been skipped. At line: {}", subStmtCtx.argument(),
316 subStmtCtx.coerceParentContext().argument(), refineTargetNodeCtx.argument(),
317 subStmtCtx.sourceReference());
319 verify(refineTargetNodeCtx instanceof StatementContextBase);
320 addOrReplaceNodes(subStmtCtx, (StatementContextBase<?, ?, ?>) refineTargetNodeCtx);
323 // Target is a prerequisite for the 'refine', hence if the target is not supported, the refine is not supported
324 // as well. Otherwise add a pointer to the target into refine's local namespace.
325 if (refineTargetNodeCtx.isSupportedToBuildEffective()) {
326 subStmtCtx.addToNs(RefineTargetNamespace.class, Empty.getInstance(), refineTargetNodeCtx);
328 subStmtCtx.setIsSupportedToBuildEffective(false);
332 private static void addOrReplaceNodes(final Mutable<?, ?, ?> subStmtCtx,
333 final StatementContextBase<?, ?, ?> refineTargetNodeCtx) {
334 for (final Mutable<?, ?, ?> refineSubstatementCtx : subStmtCtx.mutableDeclaredSubstatements()) {
335 if (isSupportedRefineSubstatement(refineSubstatementCtx)) {
336 addOrReplaceNode(refineSubstatementCtx, refineTargetNodeCtx);
341 private static void addOrReplaceNode(final Mutable<?, ?, ?> refineSubstatementCtx,
342 final StatementContextBase<?, ?, ?> refineTargetNodeCtx) {
344 final StatementDefinition refineSubstatementDef = refineSubstatementCtx.publicDefinition();
346 SourceException.throwIf(!isSupportedRefineTarget(refineSubstatementCtx, refineTargetNodeCtx),
347 refineSubstatementCtx,
348 "Error in module '%s' in the refine of uses '%s': can not perform refine of '%s' for the target '%s'.",
349 refineSubstatementCtx.getRoot().rawArgument(), refineSubstatementCtx.coerceParentContext().argument(),
350 refineSubstatementCtx.publicDefinition(), refineTargetNodeCtx.publicDefinition());
352 if (!isAllowedToAddByRefine(refineSubstatementDef)) {
353 refineTargetNodeCtx.removeStatementFromEffectiveSubstatements(refineSubstatementDef);
355 refineTargetNodeCtx.addEffectiveSubstatement(refineSubstatementCtx.replicaAsChildOf(refineTargetNodeCtx));
358 // FIXME: clarify this and inline into single caller
359 private static boolean isAllowedToAddByRefine(final StatementDefinition publicDefinition) {
360 return YangStmtMapping.MUST.equals(publicDefinition);
363 private static boolean isSupportedRefineSubstatement(final StmtContext<?, ?, ?> refineSubstatementCtx) {
364 final Collection<?> supportedRefineSubstatements = refineSubstatementCtx.getFromNamespace(
365 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_REFINE_SUBSTATEMENTS);
367 return supportedRefineSubstatements == null || supportedRefineSubstatements.isEmpty()
368 || supportedRefineSubstatements.contains(refineSubstatementCtx.publicDefinition())
369 || StmtContextUtils.isUnknownStatement(refineSubstatementCtx);
372 private static boolean isSupportedRefineTarget(final StmtContext<?, ?, ?> refineSubstatementCtx,
373 final StmtContext<?, ?, ?> refineTargetNodeCtx) {
374 final Collection<?> supportedRefineTargets = YangValidationBundles.SUPPORTED_REFINE_TARGETS.get(
375 refineSubstatementCtx.publicDefinition());
377 return supportedRefineTargets == null || supportedRefineTargets.isEmpty()
378 || supportedRefineTargets.contains(refineTargetNodeCtx.publicDefinition());