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.DeclaredStatement;
30 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
31 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
32 import org.opendaylight.yangtools.yang.model.api.stmt.RefineEffectiveStatement;
33 import org.opendaylight.yangtools.yang.model.api.stmt.RefineStatement;
34 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
35 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Descendant;
36 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaTreeEffectiveStatement;
37 import org.opendaylight.yangtools.yang.model.api.stmt.UsesEffectiveStatement;
38 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
39 import org.opendaylight.yangtools.yang.parser.rfc7950.reactor.YangValidationBundles;
40 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.EffectiveStatementMixins;
41 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.refine.RefineEffectiveStatementImpl;
42 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.refine.RefineTargetNamespace;
43 import org.opendaylight.yangtools.yang.parser.spi.GroupingNamespace;
44 import org.opendaylight.yangtools.yang.parser.spi.SchemaTreeNamespace;
45 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractQNameStatementSupport;
46 import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
47 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
48 import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
49 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
50 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
51 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
52 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
53 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
54 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
55 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
56 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
57 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
58 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToModuleQName;
59 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
60 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
61 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
62 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
63 import org.slf4j.Logger;
64 import org.slf4j.LoggerFactory;
66 public final class UsesStatementSupport
67 extends AbstractQNameStatementSupport<UsesStatement, UsesEffectiveStatement> {
68 private static final Logger LOG = LoggerFactory.getLogger(UsesStatementSupport.class);
69 private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
71 .addAny(YangStmtMapping.AUGMENT)
72 .addOptional(YangStmtMapping.DESCRIPTION)
73 .addAny(YangStmtMapping.IF_FEATURE)
74 .addAny(YangStmtMapping.REFINE)
75 .addOptional(YangStmtMapping.REFERENCE)
76 .addOptional(YangStmtMapping.STATUS)
77 .addOptional(YangStmtMapping.WHEN)
79 private static final UsesStatementSupport INSTANCE = new UsesStatementSupport();
81 private UsesStatementSupport() {
82 super(YangStmtMapping.USES, CopyPolicy.DECLARED_COPY);
85 public static UsesStatementSupport getInstance() {
90 public QName parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
91 return StmtContextUtils.parseNodeIdentifier(ctx, value);
95 public void onFullDefinitionDeclared(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
96 if (!usesNode.isSupportedByFeatures()) {
99 super.onFullDefinitionDeclared(usesNode);
101 final ModelActionBuilder usesAction = usesNode.newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
102 final QName groupingName = usesNode.argument();
104 final Prerequisite<StmtContext<?, ?, ?>> sourceGroupingPre = usesAction.requiresCtx(usesNode,
105 GroupingNamespace.class, groupingName, ModelProcessingPhase.EFFECTIVE_MODEL);
106 final Prerequisite<? extends StmtContext.Mutable<?, ?, ?>> targetNodePre = usesAction.mutatesEffectiveCtx(
107 usesNode.getParentContext());
109 usesAction.apply(new InferenceAction() {
112 public void apply(final InferenceContext ctx) {
113 final StatementContextBase<?, ?, ?> targetNodeStmtCtx =
114 (StatementContextBase<?, ?, ?>) targetNodePre.resolve(ctx);
115 final StatementContextBase<?, ?, ?> sourceGrpStmtCtx =
116 (StatementContextBase<?, ?, ?>) sourceGroupingPre.resolve(ctx);
118 copyFromSourceToTarget(sourceGrpStmtCtx, targetNodeStmtCtx, usesNode);
119 resolveUsesNode(usesNode, targetNodeStmtCtx);
120 StmtContextUtils.validateIfFeatureAndWhenOnListKeys(usesNode);
121 usesNode.addToNs(SourceGroupingNamespace.class, Empty.getInstance(), sourceGrpStmtCtx);
125 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
126 InferenceException.throwIf(failed.contains(sourceGroupingPre), usesNode,
127 "Grouping '%s' was not resolved.", groupingName);
128 throw new InferenceException("Unknown error occurred.", usesNode);
134 protected SubstatementValidator getSubstatementValidator() {
135 return SUBSTATEMENT_VALIDATOR;
139 protected UsesStatement createDeclared(final StmtContext<QName, UsesStatement, ?> ctx,
140 final ImmutableList<? extends DeclaredStatement<?>> substatements) {
141 return new RegularUsesStatement(ctx.getRawArgument(), ctx.getArgument(), substatements);
145 protected UsesStatement createEmptyDeclared(final StmtContext<QName, UsesStatement, ?> ctx) {
146 return new EmptyUsesStatement(ctx.getRawArgument(), ctx.getArgument());
150 protected UsesEffectiveStatement createEffective(final Current<QName, UsesStatement> stmt,
151 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
152 final GroupingDefinition sourceGrouping = (GroupingDefinition)
153 verifyNotNull(stmt.getFromNamespace(SourceGroupingNamespace.class, Empty.getInstance())).buildEffective();
154 final int flags = EffectiveStatementMixins.historyAndStatusFlags(stmt.history(), substatements);
155 final QName argument = stmt.getArgument();
156 final UsesStatement declared = stmt.declared();
158 if (substatements.isEmpty()) {
159 return argument.equals(declared.argument())
160 ? new EmptyLocalUsesEffectiveStatement(declared, sourceGrouping, flags)
161 : new SimpleCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags);
164 if (declared.argument().equals(argument)) {
165 return new RegularLocalUsesEffectiveStatement(declared, sourceGrouping, flags, substatements);
167 if (findFirstStatement(substatements, RefineEffectiveStatement.class) == null) {
168 return new SimpleCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags, substatements);
170 return new FullCopiedUsesEffectiveStatement(declared, argument, sourceGrouping, flags, substatements);
173 static @NonNull ImmutableMap<Descendant, SchemaNode> indexRefines(
174 final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
175 final Map<Descendant, SchemaNode> refines = new LinkedHashMap<>();
177 for (EffectiveStatement<?, ?> effectiveStatement : substatements) {
178 if (effectiveStatement instanceof RefineEffectiveStatementImpl) {
179 final RefineEffectiveStatementImpl refineStmt = (RefineEffectiveStatementImpl) effectiveStatement;
180 refines.put(refineStmt.argument(), refineStmt.getRefineTargetNode());
184 return ImmutableMap.copyOf(refines);
188 * Copy statements from a grouping to a target node.
190 * @param sourceGrpStmtCtx
191 * source grouping statement context
196 * @throws SourceException
197 * instance of SourceException
199 @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
200 justification = "https://github.com/spotbugs/spotbugs/issues/811")
201 private static void copyFromSourceToTarget(final Mutable<?, ?, ?> sourceGrpStmtCtx,
202 final StatementContextBase<?, ?, ?> targetCtx,
203 final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
204 final Collection<? extends Mutable<?, ?, ?>> declared = sourceGrpStmtCtx.mutableDeclaredSubstatements();
205 final Collection<? extends Mutable<?, ?, ?>> effective = sourceGrpStmtCtx.mutableEffectiveSubstatements();
206 final Collection<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
207 final QNameModule newQNameModule = getNewQNameModule(targetCtx, sourceGrpStmtCtx);
209 for (final Mutable<?, ?, ?> original : declared) {
210 if (original.isSupportedByFeatures() && shouldCopy(original)) {
211 original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, newQNameModule).ifPresent(buffer::add);
215 for (final Mutable<?, ?, ?> original : effective) {
216 if (shouldCopy(original)) {
217 original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, newQNameModule).ifPresent(buffer::add);
221 targetCtx.addEffectiveSubstatements(buffer);
222 usesNode.addAsEffectOfStatement(buffer);
225 private static boolean shouldCopy(final StmtContext<?, ?, ?> stmt) {
226 // https://tools.ietf.org/html/rfc7950#section-7.13:
228 // The effect of a "uses" reference to a grouping is that the nodes
229 // defined by the grouping are copied into the current schema tree and
230 // are then updated according to the "refine" and "augment" statements.
232 // This means that the statement that is about to be copied (and can be subjected to buildEffective() I think)
233 // is actually a SchemaTreeEffectiveStatement
234 if (SchemaTreeEffectiveStatement.class.isAssignableFrom(
235 stmt.publicDefinition().getEffectiveRepresentationClass())) {
239 // As per https://tools.ietf.org/html/rfc7950#section-7.13.2:
241 // o Any node can get refined extensions, if the extension allows
242 // refinement. See Section 7.19 for details.
244 // and https://tools.ietf.org/html/rfc7950#section-7.19:
246 // An extension can allow refinement (see Section 7.13.2) and deviations
247 // (Section 7.20.3.2), but the mechanism for how this is defined is
248 // outside the scope of this specification.
250 // This is actively used out there (tailf-common.yang's tailf:action), which is incorrect, though. They do
251 // publish a bunch of metadata (through tailf-meta-extension.yang), but fail to publish a key aspect of the
252 // statement: it attaches to schema tree namespace (just as RFC7950 action does). Such an extension would
253 // automatically result in the extension being picked up by the above check and everybody would live happily
256 // We do not live in that world yet, hence we do the following and keep our fingers crossed.
257 // FIXME: YANGTOOLS-403: this should not be necessary once we implement the above (although tests will complain)
258 return StmtContextUtils.isUnknownStatement(stmt);
261 private static QNameModule getNewQNameModule(final StmtContext<?, ?, ?> targetCtx,
262 final StmtContext<?, ?, ?> stmtContext) {
263 if (targetCtx.getParentContext() == null) {
264 return targetCtx.getFromNamespace(ModuleCtxToModuleQName.class, targetCtx);
266 if (targetCtx.publicDefinition() == YangStmtMapping.AUGMENT) {
267 return StmtContextUtils.getRootModuleQName(targetCtx);
270 final Object targetStmtArgument = targetCtx.argument();
271 final Object sourceStmtArgument = stmtContext.argument();
272 if (targetStmtArgument instanceof QName && sourceStmtArgument instanceof QName) {
273 return ((QName) targetStmtArgument).getModule();
279 @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
280 justification = "https://github.com/spotbugs/spotbugs/issues/811")
281 private static void resolveUsesNode(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode,
282 final StmtContext<?, ?, ?> targetNodeStmtCtx) {
283 for (final Mutable<?, ?, ?> subStmtCtx : usesNode.mutableDeclaredSubstatements()) {
284 if (subStmtCtx.producesDeclared(RefineStatement.class) && areFeaturesSupported(subStmtCtx)) {
285 performRefine(subStmtCtx, targetNodeStmtCtx);
290 private static boolean areFeaturesSupported(final StmtContext<?, ?, ?> subStmtCtx) {
292 * In case of Yang 1.1, checks whether features are supported.
294 return !YangVersion.VERSION_1_1.equals(subStmtCtx.yangVersion()) || subStmtCtx.isSupportedByFeatures();
297 private static void performRefine(final Mutable<?, ?, ?> subStmtCtx, final StmtContext<?, ?, ?> usesParentCtx) {
298 final Object refineArgument = subStmtCtx.argument();
299 InferenceException.throwIf(!(refineArgument instanceof SchemaNodeIdentifier), subStmtCtx,
300 "Invalid refine argument %s. It must be instance of SchemaNodeIdentifier.", refineArgument);
302 final Optional<StmtContext<?, ?, ?>> optRefineTargetCtx = SchemaTreeNamespace.findNode(
303 usesParentCtx, (SchemaNodeIdentifier) refineArgument);
304 InferenceException.throwIf(!optRefineTargetCtx.isPresent(), subStmtCtx, "Refine target node %s not found.",
307 // FIXME: This communicates the looked-up target node to RefineStatementSupport.buildEffective(). We should do
308 // this trick through a shared namespace or similar reactor-agnostic meeting place. It really feels like
309 // an inference action RefineStatementSupport should be doing.
310 final StmtContext<?, ?, ?> refineTargetNodeCtx = optRefineTargetCtx.get();
311 if (StmtContextUtils.isUnknownStatement(refineTargetNodeCtx)) {
312 LOG.trace("Refine node '{}' in uses '{}' has target node unknown statement '{}'. "
313 + "Refine has been skipped. At line: {}", subStmtCtx.argument(),
314 subStmtCtx.coerceParentContext().argument(), refineTargetNodeCtx.argument(),
315 subStmtCtx.sourceReference());
317 verify(refineTargetNodeCtx instanceof StatementContextBase);
318 addOrReplaceNodes(subStmtCtx, (StatementContextBase<?, ?, ?>) refineTargetNodeCtx);
321 subStmtCtx.addToNs(RefineTargetNamespace.class, Empty.getInstance(), refineTargetNodeCtx);
324 private static void addOrReplaceNodes(final Mutable<?, ?, ?> subStmtCtx,
325 final StatementContextBase<?, ?, ?> refineTargetNodeCtx) {
326 for (final Mutable<?, ?, ?> refineSubstatementCtx : subStmtCtx.mutableDeclaredSubstatements()) {
327 if (isSupportedRefineSubstatement(refineSubstatementCtx)) {
328 addOrReplaceNode(refineSubstatementCtx, refineTargetNodeCtx);
333 private static void addOrReplaceNode(final Mutable<?, ?, ?> refineSubstatementCtx,
334 final StatementContextBase<?, ?, ?> refineTargetNodeCtx) {
336 final StatementDefinition refineSubstatementDef = refineSubstatementCtx.publicDefinition();
338 SourceException.throwIf(!isSupportedRefineTarget(refineSubstatementCtx, refineTargetNodeCtx),
339 refineSubstatementCtx,
340 "Error in module '%s' in the refine of uses '%s': can not perform refine of '%s' for the target '%s'.",
341 refineSubstatementCtx.getRoot().rawArgument(), refineSubstatementCtx.coerceParentContext().argument(),
342 refineSubstatementCtx.publicDefinition(), refineTargetNodeCtx.publicDefinition());
344 if (isAllowedToAddByRefine(refineSubstatementDef)) {
345 refineTargetNodeCtx.addEffectiveSubstatement(refineSubstatementCtx);
347 refineTargetNodeCtx.removeStatementFromEffectiveSubstatements(refineSubstatementDef);
348 refineTargetNodeCtx.addEffectiveSubstatement(refineSubstatementCtx);
352 private static boolean isAllowedToAddByRefine(final StatementDefinition publicDefinition) {
353 return YangStmtMapping.MUST.equals(publicDefinition);
356 private static boolean isSupportedRefineSubstatement(final StmtContext<?, ?, ?> refineSubstatementCtx) {
357 final Collection<?> supportedRefineSubstatements = refineSubstatementCtx.getFromNamespace(
358 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_REFINE_SUBSTATEMENTS);
360 return supportedRefineSubstatements == null || supportedRefineSubstatements.isEmpty()
361 || supportedRefineSubstatements.contains(refineSubstatementCtx.publicDefinition())
362 || StmtContextUtils.isUnknownStatement(refineSubstatementCtx);
365 private static boolean isSupportedRefineTarget(final StmtContext<?, ?, ?> refineSubstatementCtx,
366 final StmtContext<?, ?, ?> refineTargetNodeCtx) {
367 final Collection<?> supportedRefineTargets = YangValidationBundles.SUPPORTED_REFINE_TARGETS.get(
368 refineSubstatementCtx.publicDefinition());
370 return supportedRefineTargets == null || supportedRefineTargets.isEmpty()
371 || supportedRefineTargets.contains(refineTargetNodeCtx.publicDefinition());