*/
package org.opendaylight.yangtools.yang.parser.rfc7950.stmt.uses;
+import com.google.common.base.Verify;
+import java.util.ArrayList;
import java.util.Collection;
+import java.util.Optional;
import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.common.QNameModule;
+import org.opendaylight.yangtools.yang.common.YangVersion;
import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
-import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
+import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
+import org.opendaylight.yangtools.yang.model.api.stmt.RefineStatement;
+import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
+import org.opendaylight.yangtools.yang.model.api.stmt.SchemaTreeEffectiveStatement;
+import org.opendaylight.yangtools.yang.model.api.stmt.UsesEffectiveStatement;
import org.opendaylight.yangtools.yang.model.api.stmt.UsesStatement;
+import org.opendaylight.yangtools.yang.parser.rfc7950.namespace.ChildSchemaNodeNamespace;
+import org.opendaylight.yangtools.yang.parser.rfc7950.reactor.YangValidationBundles;
import org.opendaylight.yangtools.yang.parser.spi.GroupingNamespace;
import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractQNameStatementSupport;
+import org.opendaylight.yangtools.yang.parser.spi.meta.CopyType;
import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
+import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToModuleQName;
+import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
+import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace;
+import org.opendaylight.yangtools.yang.parser.spi.validation.ValidationBundlesNamespace.ValidationBundleType;
import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
-public final class UsesStatementSupport extends
- AbstractQNameStatementSupport<UsesStatement, EffectiveStatement<QName, UsesStatement>> {
+public final class UsesStatementSupport
+ extends AbstractQNameStatementSupport<UsesStatement, UsesEffectiveStatement> {
+ private static final Logger LOG = LoggerFactory.getLogger(UsesStatementSupport.class);
private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
.USES)
.addAny(YangStmtMapping.AUGMENT)
private static final UsesStatementSupport INSTANCE = new UsesStatementSupport();
private UsesStatementSupport() {
- super(YangStmtMapping.USES);
+ super(YangStmtMapping.USES, CopyPolicy.IGNORE);
}
public static UsesStatementSupport getInstance() {
}
@Override
- public void onFullDefinitionDeclared(
- final Mutable<QName, UsesStatement, EffectiveStatement<QName, UsesStatement>> usesNode) {
+ public void onFullDefinitionDeclared(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
if (!usesNode.isSupportedByFeatures()) {
return;
}
final StatementContextBase<?, ?, ?> sourceGrpStmtCtx =
(StatementContextBase<?, ?, ?>) sourceGroupingPre.resolve(ctx);
- UsesStatementImpl.copyFromSourceToTarget(sourceGrpStmtCtx, targetNodeStmtCtx, usesNode);
- UsesStatementImpl.resolveUsesNode(usesNode, targetNodeStmtCtx);
+ copyFromSourceToTarget(sourceGrpStmtCtx, targetNodeStmtCtx, usesNode);
+ resolveUsesNode(usesNode, targetNodeStmtCtx);
StmtContextUtils.validateIfFeatureAndWhenOnListKeys(usesNode);
}
}
@Override
- public EffectiveStatement<QName, UsesStatement> createEffective(
- final StmtContext<QName, UsesStatement, EffectiveStatement<QName, UsesStatement>> ctx) {
+ public UsesEffectiveStatement createEffective(final StmtContext<QName, UsesStatement, UsesEffectiveStatement> ctx) {
return new UsesEffectiveStatementImpl(ctx);
}
protected SubstatementValidator getSubstatementValidator() {
return SUBSTATEMENT_VALIDATOR;
}
-}
\ No newline at end of file
+
+ /**
+ * Copy statements from a grouping to a target node.
+ *
+ * @param sourceGrpStmtCtx
+ * source grouping statement context
+ * @param targetCtx
+ * target context
+ * @param usesNode
+ * uses node
+ * @throws SourceException
+ * instance of SourceException
+ */
+ private static void copyFromSourceToTarget(final Mutable<?, ?, ?> sourceGrpStmtCtx,
+ final StatementContextBase<?, ?, ?> targetCtx,
+ final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode) {
+ final Collection<? extends Mutable<?, ?, ?>> declared = sourceGrpStmtCtx.mutableDeclaredSubstatements();
+ final Collection<? extends Mutable<?, ?, ?>> effective = sourceGrpStmtCtx.mutableEffectiveSubstatements();
+ final Collection<Mutable<?, ?, ?>> buffer = new ArrayList<>(declared.size() + effective.size());
+ final QNameModule newQNameModule = getNewQNameModule(targetCtx, sourceGrpStmtCtx);
+
+ for (final Mutable<?, ?, ?> original : declared) {
+ if (original.isSupportedByFeatures() && shouldCopy(original)) {
+ original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, newQNameModule).ifPresent(buffer::add);
+ }
+ }
+
+ for (final Mutable<?, ?, ?> original : effective) {
+ if (shouldCopy(original)) {
+ original.copyAsChildOf(targetCtx, CopyType.ADDED_BY_USES, newQNameModule).ifPresent(buffer::add);
+ }
+ }
+
+ targetCtx.addEffectiveSubstatements(buffer);
+ usesNode.addAsEffectOfStatement(buffer);
+ }
+
+
+ private static boolean shouldCopy(final StmtContext<?, ?, ?> stmt) {
+ // https://tools.ietf.org/html/rfc7950#section-7.13:
+ //
+ // The effect of a "uses" reference to a grouping is that the nodes
+ // defined by the grouping are copied into the current schema tree and
+ // are then updated according to the "refine" and "augment" statements.
+ //
+ // This means that the statement that is about to be copied (and can be subjected to buildEffective() I think)
+ // is actually a SchemaTreeEffectiveStatement
+ if (SchemaTreeEffectiveStatement.class.isAssignableFrom(
+ stmt.getPublicDefinition().getEffectiveRepresentationClass())) {
+ return true;
+ }
+
+ // As per https://tools.ietf.org/html/rfc7950#section-7.13.2:
+ //
+ // o Any node can get refined extensions, if the extension allows
+ // refinement. See Section 7.19 for details.
+ //
+ // and https://tools.ietf.org/html/rfc7950#section-7.19:
+ //
+ // An extension can allow refinement (see Section 7.13.2) and deviations
+ // (Section 7.20.3.2), but the mechanism for how this is defined is
+ // outside the scope of this specification.
+ //
+ // This is actively used out there (tailf-common.yang's tailf:action), which is incorrect, though. They do
+ // publish a bunch of metadata (through tailf-meta-extension.yang), but fail to publish a key aspect of the
+ // statement: it attaches to schema tree namespace (just as RFC7950 action does). Such an extension would
+ // automatically result in the extension being picked up by the above check and everybody would live happily
+ // ever after.
+ //
+ // We do not live in that world yet, hence we do the following and keep our fingers crossed.
+ // FIXME: YANGTOOLS-403: this should not be necessary once we implement the above (although tests will complain)
+ return StmtContextUtils.isUnknownStatement(stmt);
+ }
+
+ private static QNameModule getNewQNameModule(final StmtContext<?, ?, ?> targetCtx,
+ final StmtContext<?, ?, ?> stmtContext) {
+ if (targetCtx.getParentContext() == null) {
+ return targetCtx.getFromNamespace(ModuleCtxToModuleQName.class, targetCtx);
+ }
+ if (targetCtx.getPublicDefinition() == YangStmtMapping.AUGMENT) {
+ return StmtContextUtils.getRootModuleQName(targetCtx);
+ }
+
+ final Object targetStmtArgument = targetCtx.getStatementArgument();
+ final Object sourceStmtArgument = stmtContext.getStatementArgument();
+ if (targetStmtArgument instanceof QName && sourceStmtArgument instanceof QName) {
+ return ((QName) targetStmtArgument).getModule();
+ }
+
+ return null;
+ }
+
+ private static void resolveUsesNode(final Mutable<QName, UsesStatement, UsesEffectiveStatement> usesNode,
+ final StmtContext<?, ?, ?> targetNodeStmtCtx) {
+ for (final Mutable<?, ?, ?> subStmtCtx : usesNode.mutableDeclaredSubstatements()) {
+ if (StmtContextUtils.producesDeclared(subStmtCtx, RefineStatement.class)
+ && areFeaturesSupported(subStmtCtx)) {
+ performRefine(subStmtCtx, targetNodeStmtCtx);
+ }
+ }
+ }
+
+ private static boolean areFeaturesSupported(final StmtContext<?, ?, ?> subStmtCtx) {
+ /*
+ * In case of Yang 1.1, checks whether features are supported.
+ */
+ return !YangVersion.VERSION_1_1.equals(subStmtCtx.getRootVersion()) || subStmtCtx.isSupportedByFeatures();
+ }
+
+ private static void performRefine(final Mutable<?, ?, ?> subStmtCtx, final StmtContext<?, ?, ?> usesParentCtx) {
+ final Object refineArgument = subStmtCtx.getStatementArgument();
+ InferenceException.throwIf(!(refineArgument instanceof SchemaNodeIdentifier),
+ subStmtCtx.getStatementSourceReference(),
+ "Invalid refine argument %s. It must be instance of SchemaNodeIdentifier.", refineArgument);
+
+ final Optional<StmtContext<?, ?, ?>> optRefineTargetCtx = ChildSchemaNodeNamespace.findNode(
+ usesParentCtx, (SchemaNodeIdentifier) refineArgument);
+ InferenceException.throwIf(!optRefineTargetCtx.isPresent(), subStmtCtx.getStatementSourceReference(),
+ "Refine target node %s not found.", refineArgument);
+
+ final StmtContext<?, ?, ?> refineTargetNodeCtx = optRefineTargetCtx.get();
+ if (StmtContextUtils.isUnknownStatement(refineTargetNodeCtx)) {
+ LOG.trace("Refine node '{}' in uses '{}' has target node unknown statement '{}'. "
+ + "Refine has been skipped. At line: {}", subStmtCtx.getStatementArgument(),
+ subStmtCtx.coerceParentContext().getStatementArgument(),
+ refineTargetNodeCtx.getStatementArgument(), subStmtCtx.getStatementSourceReference());
+ subStmtCtx.addAsEffectOfStatement(refineTargetNodeCtx);
+ return;
+ }
+
+ Verify.verify(refineTargetNodeCtx instanceof StatementContextBase);
+ addOrReplaceNodes(subStmtCtx, (StatementContextBase<?, ?, ?>) refineTargetNodeCtx);
+ subStmtCtx.addAsEffectOfStatement(refineTargetNodeCtx);
+ }
+
+ private static void addOrReplaceNodes(final Mutable<?, ?, ?> subStmtCtx,
+ final StatementContextBase<?, ?, ?> refineTargetNodeCtx) {
+ for (final Mutable<?, ?, ?> refineSubstatementCtx : subStmtCtx.mutableDeclaredSubstatements()) {
+ if (isSupportedRefineSubstatement(refineSubstatementCtx)) {
+ addOrReplaceNode(refineSubstatementCtx, refineTargetNodeCtx);
+ }
+ }
+ }
+
+ private static void addOrReplaceNode(final Mutable<?, ?, ?> refineSubstatementCtx,
+ final StatementContextBase<?, ?, ?> refineTargetNodeCtx) {
+
+ final StatementDefinition refineSubstatementDef = refineSubstatementCtx.getPublicDefinition();
+
+ SourceException.throwIf(!isSupportedRefineTarget(refineSubstatementCtx, refineTargetNodeCtx),
+ refineSubstatementCtx.getStatementSourceReference(),
+ "Error in module '%s' in the refine of uses '%s': can not perform refine of '%s' for the target '%s'.",
+ refineSubstatementCtx.getRoot().getStatementArgument(),
+ refineSubstatementCtx.coerceParentContext().getStatementArgument(),
+ refineSubstatementCtx.getPublicDefinition(), refineTargetNodeCtx.getPublicDefinition());
+
+ if (isAllowedToAddByRefine(refineSubstatementDef)) {
+ refineTargetNodeCtx.addEffectiveSubstatement(refineSubstatementCtx);
+ } else {
+ refineTargetNodeCtx.removeStatementFromEffectiveSubstatements(refineSubstatementDef);
+ refineTargetNodeCtx.addEffectiveSubstatement(refineSubstatementCtx);
+ }
+ }
+
+ private static boolean isAllowedToAddByRefine(final StatementDefinition publicDefinition) {
+ return YangStmtMapping.MUST.equals(publicDefinition);
+ }
+
+ private static boolean isSupportedRefineSubstatement(final StmtContext<?, ?, ?> refineSubstatementCtx) {
+ final Collection<?> supportedRefineSubstatements = refineSubstatementCtx.getFromNamespace(
+ ValidationBundlesNamespace.class, ValidationBundleType.SUPPORTED_REFINE_SUBSTATEMENTS);
+
+ return supportedRefineSubstatements == null || supportedRefineSubstatements.isEmpty()
+ || supportedRefineSubstatements.contains(refineSubstatementCtx.getPublicDefinition())
+ || StmtContextUtils.isUnknownStatement(refineSubstatementCtx);
+ }
+
+ private static boolean isSupportedRefineTarget(final StmtContext<?, ?, ?> refineSubstatementCtx,
+ final StmtContext<?, ?, ?> refineTargetNodeCtx) {
+ final Collection<?> supportedRefineTargets = YangValidationBundles.SUPPORTED_REFINE_TARGETS.get(
+ refineSubstatementCtx.getPublicDefinition());
+
+ return supportedRefineTargets == null || supportedRefineTargets.isEmpty()
+ || supportedRefineTargets.contains(refineTargetNodeCtx.getPublicDefinition());
+ }
+}
Code Review / yangtools.git / blobdiff