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 com.google.common.base.Verify;
11 import com.google.common.collect.ImmutableMap;
12 import java.util.ArrayList;
13 import java.util.Collection;
14 import java.util.Optional;
15 import org.opendaylight.yangtools.yang.common.QName;
16 import org.opendaylight.yangtools.yang.common.QNameModule;
17 import org.opendaylight.yangtools.yang.common.YangVersion;
18 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
19 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
20 import org.opendaylight.yangtools.yang.model.api.stmt.RefineStatement;
21 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
22 import org.opendaylight.yangtools.yang.model.api.stmt.UsesEffectiveStatement;
23 import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
24 import org.opendaylight.yangtools.yang.parser.rfc7950.namespace.ChildSchemaNodeNamespace;
25 import org.opendaylight.yangtools.yang.parser.rfc7950.reactor.YangValidationBundles;
26 import org.opendaylight.yangtools.yang.parser.spi.GroupingNamespace;
27 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractQNameStatementSupport;
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;
31 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
32 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
33 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
34 import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase;
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.meta.SubstatementValidator;
39 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToModuleQName;
40 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
41 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
42 import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
43 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
44 import org.slf4j.Logger;
45 import org.slf4j.LoggerFactory;
47 public final class UsesStatementSupport
48 extends AbstractQNameStatementSupport<UsesStatement, UsesEffectiveStatement> {
49 private static final Logger LOG = LoggerFactory.getLogger(UsesStatementSupport.class);
50 private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
52 .addAny(YangStmtMapping.AUGMENT)
53 .addOptional(YangStmtMapping.DESCRIPTION)
54 .addAny(YangStmtMapping.IF_FEATURE)
55 .addAny(YangStmtMapping.REFINE)
56 .addOptional(YangStmtMapping.REFERENCE)
57 .addOptional(YangStmtMapping.STATUS)
58 .addOptional(YangStmtMapping.WHEN)
60 private static final UsesStatementSupport INSTANCE = new UsesStatementSupport();
62 private UsesStatementSupport() {
63 super(YangStmtMapping.USES);
66 public static UsesStatementSupport getInstance() {
71 public QName parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
72 return StmtContextUtils.parseNodeIdentifier(ctx, value);
76 public void onFullDefinitionDeclared(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
77 if (!usesNode.isSupportedByFeatures()) {
80 super.onFullDefinitionDeclared(usesNode);
82 final ModelActionBuilder usesAction = usesNode.newInferenceAction(ModelProcessingPhase.EFFECTIVE_MODEL);
83 final QName groupingName = usesNode.getStatementArgument();
85 final Prerequisite<StmtContext<?, ?, ?>> sourceGroupingPre = usesAction.requiresCtx(usesNode,
86 GroupingNamespace.class, groupingName, ModelProcessingPhase.EFFECTIVE_MODEL);
87 final Prerequisite<? extends StmtContext.Mutable<?, ?, ?>> targetNodePre = usesAction.mutatesEffectiveCtx(
88 usesNode.getParentContext());
90 usesAction.apply(new InferenceAction() {
93 public void apply(final InferenceContext ctx) {
94 final StatementContextBase<?, ?, ?> targetNodeStmtCtx =
95 (StatementContextBase<?, ?, ?>) targetNodePre.resolve(ctx);
96 final StatementContextBase<?, ?, ?> sourceGrpStmtCtx =
97 (StatementContextBase<?, ?, ?>) sourceGroupingPre.resolve(ctx);
99 copyFromSourceToTarget(sourceGrpStmtCtx, targetNodeStmtCtx, usesNode);
100 resolveUsesNode(usesNode, targetNodeStmtCtx);
101 StmtContextUtils.validateIfFeatureAndWhenOnListKeys(usesNode);
105 public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
106 InferenceException.throwIf(failed.contains(sourceGroupingPre),
107 usesNode.getStatementSourceReference(), "Grouping '%s' was not resolved.", groupingName);
108 throw new InferenceException("Unknown error occurred.", usesNode.getStatementSourceReference());
114 public UsesStatement createDeclared(final StmtContext<QName, UsesStatement, ?> ctx) {
115 return new UsesStatementImpl(ctx);
119 public UsesEffectiveStatement createEffective(final StmtContext<QName, UsesStatement, UsesEffectiveStatement> ctx) {
120 return new UsesEffectiveStatementImpl(ctx);
124 protected SubstatementValidator getSubstatementValidator() {
125 return SUBSTATEMENT_VALIDATOR;
129 * Copy statements from a grouping to a target node.
131 * @param sourceGrpStmtCtx
132 * source grouping statement context
137 * @throws SourceException
138 * instance of SourceException
140 private static void copyFromSourceToTarget(final Mutable<?, ?, ?> sourceGrpStmtCtx,
141 final StatementContextBase<?, ?, ?> targetCtx,
142 final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
143 final Collection<? extends Mutable<?, ?, ?>> declared = sourceGrpStmtCtx.mutableDeclaredSubstatements();
144 final Collection<? extends Mutable<?, ?, ?>> effective = sourceGrpStmtCtx.mutableEffectiveSubstatements();
145 final Collection<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
146 final QNameModule newQNameModule = getNewQNameModule(targetCtx, sourceGrpStmtCtx);
148 for (final Mutable<?, ?, ?> original : declared) {
149 if (original.isSupportedByFeatures()) {
150 copyStatement(original, targetCtx, newQNameModule, buffer);
154 for (final Mutable<?, ?, ?> original : effective) {
155 copyStatement(original, targetCtx, newQNameModule, buffer);
158 targetCtx.addEffectiveSubstatements(buffer);
159 usesNode.addAsEffectOfStatement(buffer);
162 // Note: do not put CopyPolicy.DECLARED_COPY, we treat non-presence as such
163 private static final ImmutableMap<StatementDefinition, CopyPolicy> GROUPING_TO_TARGET_POLICY =
164 ImmutableMap.<StatementDefinition, CopyPolicy>builder()
165 // FIXME: YANGTOOLS-652: this map looks very much like InferredStatementContext.REUSED_DEF_SET
166 // a grouping's type/typedef statements are fully defined at the grouping, we want the same effective
168 .put(YangStmtMapping.TYPE, CopyPolicy.CONTEXT_INDEPENDENT)
169 .put(YangStmtMapping.TYPEDEF, CopyPolicy.CONTEXT_INDEPENDENT)
171 // We do not want to propagate description/reference/status statements, as they are the source
172 // grouping's documentation, not target statement's
173 .put(YangStmtMapping.DESCRIPTION, CopyPolicy.IGNORE)
174 .put(YangStmtMapping.REFERENCE, CopyPolicy.IGNORE)
175 .put(YangStmtMapping.STATUS, CopyPolicy.IGNORE)
177 // Do not propagate uses, as their effects have been accounted for in effective statements
178 // FIXME: YANGTOOLS-652: this check is different from InferredStatementContext. Why is that? We should
179 // express a common condition in our own implementation of applyCopyPolicy() --
180 // most notably reactor performs the equivalent of CopyPolicy.CONTEXT_INDEPENDENT.
181 // FIXME: YANGTOOLS-694: note that if the above is true, why are we propagating grouping statements?
182 .put(YangStmtMapping.USES, CopyPolicy.IGNORE)
185 private static void copyStatement(final Mutable<?, ?, ?> original,
186 final StatementContextBase<?, ?, ?> targetCtx, final QNameModule targetModule,
187 final Collection<Mutable<?, ?, ?>> buffer) {
189 // FIXME: YANGTOOLS-694: This method needs to be adjusted to account for RFC7950,
190 // https://tools.ietf.org/html/rfc7950#section-7.13, which states that:
192 // The effect of a "uses" reference to a grouping is that the nodes
193 // defined by the grouping are copied into the current schema tree and
194 // are then updated according to the "refine" and "augment" statements.
196 // This means that the statement that is about to be copied (and can be subjected to
197 // buildEffective() I think) is actually a SchemaTreeEffectiveStatement -- i.e. if it
198 // is not a SchemaTreeEffectiveStatement, it just cannot be added to target's tree and
199 // hence it should not be copied.
200 final CopyPolicy policy = GROUPING_TO_TARGET_POLICY.get(original.getPublicDefinition());
201 if (policy == null) {
202 original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, targetModule).ifPresent(buffer::add);
203 } else if (policy == CopyPolicy.CONTEXT_INDEPENDENT) {
204 buffer.add(original);
205 } else if (policy == CopyPolicy.IGNORE) {
208 throw new IllegalStateException("Unhandled policy " + policy);
212 private static QNameModule getNewQNameModule(final StmtContext<?, ?, ?> targetCtx,
213 final StmtContext<?, ?, ?> stmtContext) {
214 if (targetCtx.getParentContext() == null) {
215 return targetCtx.getFromNamespace(ModuleCtxToModuleQName.class, targetCtx);
217 if (targetCtx.getPublicDefinition() == YangStmtMapping.AUGMENT) {
218 return StmtContextUtils.getRootModuleQName(targetCtx);
221 final Object targetStmtArgument = targetCtx.getStatementArgument();
222 final Object sourceStmtArgument = stmtContext.getStatementArgument();
223 if (targetStmtArgument instanceof QName && sourceStmtArgument instanceof QName) {
224 return ((QName) targetStmtArgument).getModule();
230 private static void resolveUsesNode(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode,
231 final StmtContext<?, ?, ?> targetNodeStmtCtx) {
232 for (final Mutable<?, ?, ?> subStmtCtx : usesNode.mutableDeclaredSubstatements()) {
233 if (StmtContextUtils.producesDeclared(subStmtCtx, RefineStatement.class)
234 && areFeaturesSupported(subStmtCtx)) {
235 performRefine(subStmtCtx, targetNodeStmtCtx);
240 private static boolean areFeaturesSupported(final StmtContext<?, ?, ?> subStmtCtx) {
242 * In case of Yang 1.1, checks whether features are supported.
244 return !YangVersion.VERSION_1_1.equals(subStmtCtx.getRootVersion()) || subStmtCtx.isSupportedByFeatures();
247 private static void performRefine(final Mutable<?, ?, ?> subStmtCtx, final StmtContext<?, ?, ?> usesParentCtx) {
248 final Object refineArgument = subStmtCtx.getStatementArgument();
249 InferenceException.throwIf(!(refineArgument instanceof SchemaNodeIdentifier),
250 subStmtCtx.getStatementSourceReference(),
251 "Invalid refine argument %s. It must be instance of SchemaNodeIdentifier.", refineArgument);
253 final Optional<StmtContext<?, ?, ?>> optRefineTargetCtx = ChildSchemaNodeNamespace.findNode(
254 usesParentCtx, (SchemaNodeIdentifier) refineArgument);
255 InferenceException.throwIf(!optRefineTargetCtx.isPresent(), subStmtCtx.getStatementSourceReference(),
256 "Refine target node %s not found.", refineArgument);
258 final StmtContext<?, ?, ?> refineTargetNodeCtx = optRefineTargetCtx.get();
259 if (StmtContextUtils.isUnknownStatement(refineTargetNodeCtx)) {
260 LOG.trace("Refine node '{}' in uses '{}' has target node unknown statement '{}'. "
261 + "Refine has been skipped. At line: {}", subStmtCtx.getStatementArgument(),
262 subStmtCtx.coerceParentContext().getStatementArgument(),
263 refineTargetNodeCtx.getStatementArgument(), subStmtCtx.getStatementSourceReference());
264 subStmtCtx.addAsEffectOfStatement(refineTargetNodeCtx);
268 Verify.verify(refineTargetNodeCtx instanceof StatementContextBase);
269 addOrReplaceNodes(subStmtCtx, (StatementContextBase<?, ?, ?>) refineTargetNodeCtx);
270 subStmtCtx.addAsEffectOfStatement(refineTargetNodeCtx);
273 private static void addOrReplaceNodes(final Mutable<?, ?, ?> subStmtCtx,
274 final StatementContextBase<?, ?, ?> refineTargetNodeCtx) {
275 for (final Mutable<?, ?, ?> refineSubstatementCtx : subStmtCtx.mutableDeclaredSubstatements()) {
276 if (isSupportedRefineSubstatement(refineSubstatementCtx)) {
277 addOrReplaceNode(refineSubstatementCtx, refineTargetNodeCtx);
282 private static void addOrReplaceNode(final Mutable<?, ?, ?> refineSubstatementCtx,
283 final StatementContextBase<?, ?, ?> refineTargetNodeCtx) {
285 final StatementDefinition refineSubstatementDef = refineSubstatementCtx.getPublicDefinition();
287 SourceException.throwIf(!isSupportedRefineTarget(refineSubstatementCtx, refineTargetNodeCtx),
288 refineSubstatementCtx.getStatementSourceReference(),
289 "Error in module '%s' in the refine of uses '%s': can not perform refine of '%s' for the target '%s'.",
290 refineSubstatementCtx.getRoot().getStatementArgument(),
291 refineSubstatementCtx.coerceParentContext().getStatementArgument(),
292 refineSubstatementCtx.getPublicDefinition(), refineTargetNodeCtx.getPublicDefinition());
294 if (isAllowedToAddByRefine(refineSubstatementDef)) {
295 refineTargetNodeCtx.addEffectiveSubstatement(refineSubstatementCtx);
297 refineTargetNodeCtx.removeStatementFromEffectiveSubstatements(refineSubstatementDef);
298 refineTargetNodeCtx.addEffectiveSubstatement(refineSubstatementCtx);
302 private static boolean isAllowedToAddByRefine(final StatementDefinition publicDefinition) {
303 return YangStmtMapping.MUST.equals(publicDefinition);
306 private static boolean isSupportedRefineSubstatement(final StmtContext<?, ?, ?> refineSubstatementCtx) {
307 final Collection<?> supportedRefineSubstatements = refineSubstatementCtx.getFromNamespace(
308 ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_REFINE_SUBSTATEMENTS);
310 return supportedRefineSubstatements == null || supportedRefineSubstatements.isEmpty()
311 || supportedRefineSubstatements.contains(refineSubstatementCtx.getPublicDefinition())
312 || StmtContextUtils.isUnknownStatement(refineSubstatementCtx);
315 private static boolean isSupportedRefineTarget(final StmtContext<?, ?, ?> refineSubstatementCtx,
316 final StmtContext<?, ?, ?> refineTargetNodeCtx) {
317 final Collection<?> supportedRefineTargets = YangValidationBundles.SUPPORTED_REFINE_TARGETS.get(
318 refineSubstatementCtx.getPublicDefinition());
320 return supportedRefineTargets == null || supportedRefineTargets.isEmpty()
321 || supportedRefineTargets.contains(refineTargetNodeCtx.getPublicDefinition());