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.parser.api.YangParserConfiguration;
43 import org.opendaylight.yangtools.yang.parser.rfc7950.reactor.YangValidationBundles;
44 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.EffectiveStmtUtils;
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.slf4j.Logger;
67 import org.slf4j.LoggerFactory;
69 public final class UsesStatementSupport
70 extends AbstractQNameStatementSupport<UsesStatement, UsesEffectiveStatement> {
71 private static final Logger LOG = LoggerFactory.getLogger(UsesStatementSupport.class);
72 private static final SubstatementValidator SUBSTATEMENT_VALIDATOR =
73 SubstatementValidator.builder(YangStmtMapping.USES)
74 .addAny(YangStmtMapping.AUGMENT)
75 .addOptional(YangStmtMapping.DESCRIPTION)
76 .addAny(YangStmtMapping.IF_FEATURE)
77 .addAny(YangStmtMapping.REFINE)
78 .addOptional(YangStmtMapping.REFERENCE)
79 .addOptional(YangStmtMapping.STATUS)
80 .addOptional(YangStmtMapping.WHEN)
83 public UsesStatementSupport(final YangParserConfiguration config) {
84 super(YangStmtMapping.USES, StatementPolicy.exactReplica(), config, SUBSTATEMENT_VALIDATOR);
88 public QName parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
89 return StmtContextUtils.parseNodeIdentifier(ctx, value);
93 public void onFullDefinitionDeclared(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
94 if (!usesNode.isSupportedByFeatures()) {
97 super.onFullDefinitionDeclared(usesNode);
99 final ModelActionBuilder usesAction = usesNode.newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
100 final QName groupingName = usesNode.argument();
102 final Prerequisite<StmtContext<?, ?, ?>> sourceGroupingPre = usesAction.requiresCtx(usesNode,
103 GroupingNamespace.class, groupingName, ModelProcessingPhase.EFFECTIVE_MODEL);
104 final Prerequisite<? extends Mutable<?, ?, ?>> targetNodePre = usesAction.mutatesEffectiveCtx(
105 usesNode.getParentContext());
107 usesAction.apply(new InferenceAction() {
110 public void apply(final InferenceContext ctx) {
111 final Mutable<?, ?, ?> targetNodeStmtCtx = targetNodePre.resolve(ctx);
112 final StmtContext<?, ?, ?> sourceGrpStmtCtx = sourceGroupingPre.resolve(ctx);
114 copyFromSourceToTarget(sourceGrpStmtCtx, targetNodeStmtCtx, usesNode);
115 resolveUsesNode(usesNode, targetNodeStmtCtx);
116 StmtContextUtils.validateIfFeatureAndWhenOnListKeys(usesNode);
117 usesNode.addToNs(SourceGroupingNamespace.class, Empty.value(), sourceGrpStmtCtx);
121 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
122 InferenceException.throwIf(failed.contains(sourceGroupingPre), usesNode,
123 "Grouping '%s' was not resolved.", groupingName);
124 throw new InferenceException("Unknown error occurred.", usesNode);
130 protected UsesStatement createDeclared(final StmtContext<QName, UsesStatement, ?> ctx,
131 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
132 return DeclaredStatements.createUses(ctx.getRawArgument(), ctx.getArgument(), substatements);
136 protected UsesStatement attachDeclarationReference(final UsesStatement stmt, final DeclarationReference reference) {
137 return DeclaredStatementDecorators.decorateUses(stmt, reference);
141 protected UsesEffectiveStatement createEffective(final Current<QName, UsesStatement> stmt,
142 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
143 final EffectiveStatement<?, ?> source =
144 verifyNotNull(stmt.getFromNamespace(SourceGroupingNamespace.class, Empty.value())).buildEffective();
145 verify(source instanceof GroupingDefinition, "Unexpected source %s", source);
146 final GroupingDefinition sourceGrouping = (GroupingDefinition) source;
148 final int flags = EffectiveStmtUtils.historyAndStatusFlags(stmt.history(), substatements);
149 final QName argument = stmt.getArgument();
150 final UsesStatement declared = stmt.declared();
152 if (substatements.isEmpty()) {
153 return argument.equals(declared.argument())
154 ? new EmptyLocalUsesEffectiveStatement(declared, sourceGrouping, flags)
155 : new SimpleCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags);
158 if (declared.argument().equals(argument)) {
159 return new RegularLocalUsesEffectiveStatement(declared, sourceGrouping, flags, substatements);
161 if (findFirstStatement(substatements, RefineEffectiveStatement.class) == null) {
162 return new SimpleCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags, substatements);
164 return new FullCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags, substatements);
167 static @NonNull ImmutableMap<Descendant, SchemaNode> indexRefines(
168 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
169 final Map<Descendant, SchemaNode> refines = new LinkedHashMap<>();
171 for (EffectiveStatement<?, ?> effectiveStatement : substatements) {
172 if (effectiveStatement instanceof RefineEffectiveStatementImpl) {
173 final RefineEffectiveStatementImpl refineStmt = (RefineEffectiveStatementImpl) effectiveStatement;
174 refines.put(refineStmt.argument(), refineStmt.getRefineTargetNode());
178 return ImmutableMap.copyOf(refines);
182 * Copy statements from a grouping to a target node.
184 * @param sourceGrpStmtCtx
185 * source grouping statement context
190 * @throws SourceException
191 * instance of SourceException
193 @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
194 justification = "https://github.com/spotbugs/spotbugs/issues/811")
195 private static void copyFromSourceToTarget(final StmtContext<?, ?, ?> sourceGrpStmtCtx,
196 final Mutable<?, ?, ?> targetCtx, final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
197 final var declared = sourceGrpStmtCtx.declaredSubstatements();
198 final var effective = sourceGrpStmtCtx.effectiveSubstatements();
199 final var buffer = new ArrayList<Mutable<?, ?, ?>>(declared.size() + effective.size());
200 final QNameModule newQNameModule = getNewQNameModule(targetCtx, sourceGrpStmtCtx);
202 for (StmtContext<?, ?, ?> original : declared) {
203 if (original.isSupportedByFeatures() && shouldCopy(original)) {
204 original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, newQNameModule).ifPresent(buffer::add);
208 for (StmtContext<?, ?, ?> original : effective) {
209 if (shouldCopy(original)) {
210 original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, newQNameModule).ifPresent(buffer::add);
214 targetCtx.addEffectiveSubstatements(buffer);
215 usesNode.addAsEffectOfStatement(buffer);
218 private static boolean shouldCopy(final StmtContext<?, ?, ?> stmt) {
219 // https://tools.ietf.org/html/rfc7950#section-7.13:
221 // The effect of a "uses" reference to a grouping is that the nodes
222 // defined by the grouping are copied into the current schema tree and
223 // are then updated according to the "refine" and "augment" statements.
225 // This means that the statement that is about to be copied (and can be subjected to buildEffective() I think)
226 // is actually a SchemaTreeEffectiveStatement
227 if (SchemaTreeEffectiveStatement.class.isAssignableFrom(
228 stmt.publicDefinition().getEffectiveRepresentationClass())) {
232 // As per https://tools.ietf.org/html/rfc7950#section-7.13.2:
234 // o Any node can get refined extensions, if the extension allows
235 // refinement. See Section 7.19 for details.
237 // and https://tools.ietf.org/html/rfc7950#section-7.19:
239 // An extension can allow refinement (see Section 7.13.2) and deviations
240 // (Section 7.20.3.2), but the mechanism for how this is defined is
241 // outside the scope of this specification.
243 // This is actively used out there (tailf-common.yang's tailf:action), which is incorrect, though. They do
244 // publish a bunch of metadata (through tailf-meta-extension.yang), but fail to publish a key aspect of the
245 // statement: it attaches to schema tree namespace (just as RFC7950 action does). Such an extension would
246 // automatically result in the extension being picked up by the above check and everybody would live happily
249 // We do not live in that world yet, hence we do the following and keep our fingers crossed.
250 // FIXME: YANGTOOLS-403: this should not be necessary once we implement the above (although tests will complain)
251 return StmtContextUtils.isUnknownStatement(stmt);
254 private static QNameModule getNewQNameModule(final StmtContext<?, ?, ?> targetCtx,
255 final StmtContext<?, ?, ?> stmtContext) {
256 if (targetCtx.getParentContext() == null) {
257 return targetCtx.getFromNamespace(ModuleCtxToModuleQName.class, targetCtx);
259 if (targetCtx.publicDefinition() == YangStmtMapping.AUGMENT) {
260 return StmtContextUtils.getRootModuleQName(targetCtx);
263 final Object targetStmtArgument = targetCtx.argument();
264 final Object sourceStmtArgument = stmtContext.argument();
265 if (targetStmtArgument instanceof QName && sourceStmtArgument instanceof QName) {
266 return ((QName) targetStmtArgument).getModule();
272 @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
273 justification = "https://github.com/spotbugs/spotbugs/issues/811")
274 private static void resolveUsesNode(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode,
275 final StmtContext<?, ?, ?> targetNodeStmtCtx) {
276 for (Mutable<?, ?, ?> subStmtCtx : usesNode.mutableDeclaredSubstatements()) {
277 if (subStmtCtx.producesDeclared(RefineStatement.class) && areFeaturesSupported(subStmtCtx)) {
278 performRefine(subStmtCtx, targetNodeStmtCtx);
283 private static boolean areFeaturesSupported(final StmtContext<?, ?, ?> subStmtCtx) {
285 * In case of Yang 1.1, checks whether features are supported.
287 return !YangVersion.VERSION_1_1.equals(subStmtCtx.yangVersion()) || subStmtCtx.isSupportedByFeatures();
290 private static void performRefine(final Mutable<?, ?, ?> subStmtCtx, final StmtContext<?, ?, ?> usesParentCtx) {
291 final Object refineArgument = subStmtCtx.argument();
292 InferenceException.throwIf(!(refineArgument instanceof SchemaNodeIdentifier), subStmtCtx,
293 "Invalid refine argument %s. It must be instance of SchemaNodeIdentifier.", refineArgument);
295 // FIXME: this really should be handled via separate inference, i.e. we first instantiate the template and when
296 // it appears, this refine will trigger on it. This reinforces the FIXME below.
297 final Optional<StmtContext<?, ?, ?>> optRefineTargetCtx = SchemaTreeNamespace.findNode(
298 usesParentCtx, (SchemaNodeIdentifier) refineArgument);
299 InferenceException.throwIf(!optRefineTargetCtx.isPresent(), subStmtCtx, "Refine target node %s not found.",
302 // FIXME: This communicates the looked-up target node to RefineStatementSupport.buildEffective(). We should do
303 // this trick through a shared namespace or similar reactor-agnostic meeting place. It really feels like
304 // an inference action RefineStatementSupport should be doing.
305 final StmtContext<?, ?, ?> refineTargetNodeCtx = optRefineTargetCtx.get();
306 if (StmtContextUtils.isUnknownStatement(refineTargetNodeCtx)) {
307 LOG.trace("Refine node '{}' in uses '{}' has target node unknown statement '{}'. "
308 + "Refine has been skipped. At line: {}", subStmtCtx.argument(),
309 subStmtCtx.coerceParentContext().argument(), refineTargetNodeCtx.argument(),
310 subStmtCtx.sourceReference());
312 verify(refineTargetNodeCtx instanceof Mutable, "Unexpected target %s", refineTargetNodeCtx);
313 addOrReplaceNodes(subStmtCtx, (Mutable<?, ?, ?>) refineTargetNodeCtx);
316 // Target is a prerequisite for the 'refine', hence if the target is not supported, the refine is not supported
317 // as well. Otherwise add a pointer to the target into refine's local namespace.
318 if (refineTargetNodeCtx.isSupportedToBuildEffective()) {
319 subStmtCtx.addToNs(RefineTargetNamespace.class, Empty.value(), refineTargetNodeCtx);
321 subStmtCtx.setUnsupported();
325 private static void addOrReplaceNodes(final StmtContext<?, ?, ?> subStmtCtx,
326 final Mutable<?, ?, ?> refineTargetNodeCtx) {
327 for (StmtContext<?, ?, ?> refineSubstatementCtx : subStmtCtx.declaredSubstatements()) {
328 if (isSupportedRefineSubstatement(refineSubstatementCtx)) {
329 addOrReplaceNode(refineSubstatementCtx, refineTargetNodeCtx);
334 private static void addOrReplaceNode(final StmtContext<?, ?, ?> refineSubstatementCtx,
335 final Mutable<?, ?, ?> refineTargetNodeCtx) {
337 final StatementDefinition refineSubstatementDef = refineSubstatementCtx.publicDefinition();
339 // FIXME: this is quite costly, use an explicit block
340 SourceException.throwIf(!isSupportedRefineTarget(refineSubstatementCtx, refineTargetNodeCtx),
341 refineSubstatementCtx,
342 "Error in module '%s' in the refine of uses '%s': can not perform refine of '%s' for the target '%s'.",
343 refineSubstatementCtx.getRoot().rawArgument(), refineSubstatementCtx.coerceParentContext().argument(),
344 refineSubstatementCtx.publicDefinition(), refineTargetNodeCtx.publicDefinition());
346 if (!isAllowedToAddByRefine(refineSubstatementDef)) {
347 refineTargetNodeCtx.removeStatementFromEffectiveSubstatements(refineSubstatementDef);
349 // FIXME: childCopyOf() should handle this through per-statement copy policy, right?
350 refineTargetNodeCtx.addEffectiveSubstatement(refineSubstatementCtx.replicaAsChildOf(refineTargetNodeCtx));
353 // FIXME: clarify this and inline into single caller
354 private static boolean isAllowedToAddByRefine(final StatementDefinition publicDefinition) {
355 return YangStmtMapping.MUST.equals(publicDefinition);
358 private static boolean isSupportedRefineSubstatement(final StmtContext<?, ?, ?> refineSubstatementCtx) {
359 final Collection<?> supportedRefineSubstatements = refineSubstatementCtx.getFromNamespace(
360 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_REFINE_SUBSTATEMENTS);
362 return supportedRefineSubstatements == null || supportedRefineSubstatements.isEmpty()
363 || supportedRefineSubstatements.contains(refineSubstatementCtx.publicDefinition())
364 || StmtContextUtils.isUnknownStatement(refineSubstatementCtx);
367 private static boolean isSupportedRefineTarget(final StmtContext<?, ?, ?> refineSubstatementCtx,
368 final StmtContext<?, ?, ?> refineTargetNodeCtx) {
369 final Collection<?> supportedRefineTargets = YangValidationBundles.SUPPORTED_REFINE_TARGETS.get(
370 refineSubstatementCtx.publicDefinition());
372 return supportedRefineTargets == null || supportedRefineTargets.isEmpty()
373 || supportedRefineTargets.contains(refineTargetNodeCtx.publicDefinition());