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.ModelProcessingPhase;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase.ExecutionOrder;
import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceBehaviour.Registry;
import org.opendaylight.yangtools.yang.parser.spi.meta.ParserNamespace;
import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
*/
private static final int REFCOUNT_SWEPT = Integer.MIN_VALUE;
+ /**
+ * Effective instance built from this context. This field as dual types. Under normal circumstances in matches the
+ * {@link #buildEffective()} instance. If this context is reused, it can be inflated to {@link EffectiveInstances}
+ * and also act as a common instance reuse site.
+ */
private @Nullable E effectiveInstance;
// Master flag controlling whether this context can yield an effective statement
// hence improve memory layout.
private byte flags;
- // Flag for use with AbstractResumedStatement. This is hiding in the alignment shadow created by above boolean
+ // Flag for use by AbstractResumedStatement, ReplicaStatementContext and InferredStatementContext. Each of them
+ // uses it to indicated a different condition. This is hiding in the alignment shadow created by
+ // 'isSupportedToBuildEffective'.
// FIXME: move this out once we have JDK15+
- private boolean fullyDefined;
+ private boolean boolFlag;
// SchemaPath cache for use with SubstatementContext and InferredStatementContext. This hurts RootStatementContext
// a bit in terms of size -- but those are only a few and SchemaPath is on its way out anyway.
- @Deprecated
- private volatile SchemaPath schemaPath;
+ // FIXME: this should become 'QName'
+ private SchemaPath schemaPath;
ReactorStmtCtx() {
// Empty on purpose
ReactorStmtCtx(final ReactorStmtCtx<A, D, E> original) {
isSupportedToBuildEffective = original.isSupportedToBuildEffective;
- fullyDefined = original.fullyDefined;
+ boolFlag = original.boolFlag;
+ flags = original.flags;
+ }
+
+ // Used by ReplicaStatementContext only
+ ReactorStmtCtx(final ReactorStmtCtx<A, D, E> original, final Void dummy) {
+ boolFlag = isSupportedToBuildEffective = original.isSupportedToBuildEffective;
flags = original.flags;
}
return getOriginalCtx().map(StmtContext::buildEffective).orElse(null);
}
+ //
+ // In the next two methods we are looking for an effective statement. If we already have an effective instance,
+ // defer to it's implementation of the equivalent search. Otherwise we search our substatement contexts.
+ //
+ // Note that the search function is split, so as to allow InferredStatementContext to do its own thing first.
+ //
+
+ @Override
+ public final <X, Z extends EffectiveStatement<X, ?>> @NonNull Optional<X> findSubstatementArgument(
+ final @NonNull Class<Z> type) {
+ final E existing = effectiveInstance;
+ return existing != null ? existing.findFirstEffectiveSubstatementArgument(type)
+ : findSubstatementArgumentImpl(type);
+ }
+
@Override
- // Non-final due to InferredStatementContext's override
- public <X, Z extends EffectiveStatement<X, ?>> @NonNull Optional<X> findSubstatementArgument(
+ public final boolean hasSubstatement(final @NonNull Class<? extends EffectiveStatement<?, ?>> type) {
+ final E existing = effectiveInstance;
+ return existing != null ? existing.findFirstEffectiveSubstatement(type).isPresent() : hasSubstatementImpl(type);
+ }
+
+ // Visible due to InferredStatementContext's override. At this point we do not have an effective instance available.
+ <X, Z extends EffectiveStatement<X, ?>> @NonNull Optional<X> findSubstatementArgumentImpl(
final @NonNull Class<Z> type) {
return allSubstatementsStream()
.filter(ctx -> ctx.isSupportedToBuildEffective() && ctx.producesEffective(type))
.map(ctx -> (X) ctx.getArgument());
}
- @Override
- // Non-final due to InferredStatementContext's override
- public boolean hasSubstatement(final @NonNull Class<? extends EffectiveStatement<?, ?>> type) {
+ // Visible due to InferredStatementContext's override. At this point we do not have an effective instance available.
+ boolean hasSubstatementImpl(final @NonNull Class<? extends EffectiveStatement<?, ?>> type) {
return allSubstatementsStream()
.anyMatch(ctx -> ctx.isSupportedToBuildEffective() && ctx.producesEffective(type));
}
return getLocalNamespace(type);
}
- @Override
- protected final void checkLocalNamespaceAllowed(final Class<? extends ParserNamespace<?, ?>> type) {
- definition().checkNamespaceAllowed(type);
- }
-
@Override
protected <K, V, N extends ParserNamespace<K, V>> void onNamespaceElementAdded(final Class<N> type, final K key,
final V value) {
return (existing = effectiveInstance) != null ? existing : loadEffective();
}
- private E loadEffective() {
+ private @NonNull E loadEffective() {
// Creating an effective statement does not strictly require a declared instance -- there are statements like
// 'input', which are implicitly defined.
// Our implementation design makes an invariant assumption that buildDeclared() has been called by the time
// we attempt to create effective statement:
declared();
- final E ret = effectiveInstance = createEffective();
+ final E ret = createEffective();
+ effectiveInstance = ret;
// we have called createEffective(), substatements are no longer guarded by us. Let's see if we can clear up
// some residue.
if (refcount == REFCOUNT_NONE) {
abstract @NonNull E createEffective();
+ /**
+ * Walk this statement's copy history and return the statement closest to original which has not had its effective
+ * statements modified. This statement and returned substatement logically have the same set of substatements, hence
+ * share substatement-derived state.
+ *
+ * @return Closest {@link ReactorStmtCtx} with equivalent effective substatements
+ */
+ abstract @NonNull ReactorStmtCtx<A, D, E> unmodifiedEffectiveSource();
+
+ @Override
+ public final ModelProcessingPhase getCompletedPhase() {
+ return ModelProcessingPhase.ofExecutionOrder(executionOrder());
+ }
+
+ abstract byte executionOrder();
+
/**
* Try to execute current {@link ModelProcessingPhase} of source parsing. If the phase has already been executed,
- * this method does nothing.
+ * this method does nothing. This must not be called with {@link ExecutionOrder#NULL}.
*
* @param phase to be executed (completed)
* @return true if phase was successfully completed
* @throws SourceException when an error occurred in source parsing
*/
- final boolean tryToCompletePhase(final ModelProcessingPhase phase) {
- return phase.isCompletedBy(getCompletedPhase()) || doTryToCompletePhase(phase);
+ final boolean tryToCompletePhase(final byte executionOrder) {
+ return executionOrder() >= executionOrder || doTryToCompletePhase(executionOrder);
}
- abstract boolean doTryToCompletePhase(ModelProcessingPhase phase);
+ abstract boolean doTryToCompletePhase(byte targetOrder);
//
//
return false;
}
- // These two exist only due to memory optimization, should live in AbstractResumedStatement. We are also reusing
- // this for ReplicaStatementContext's refcount tracking.
+ // These two exist only due to memory optimization, should live in AbstractResumedStatement.
final boolean fullyDefined() {
- return fullyDefined;
+ return boolFlag;
}
final void setFullyDefined() {
- fullyDefined = true;
+ boolFlag = true;
+ }
+
+ // This exists only due to memory optimization, should live in ReplicaStatementContext. In this context the flag
+ // indicates the need to drop source's reference count when we are being swept.
+ final boolean haveSourceReference() {
+ return boolFlag;
+ }
+
+ // These three exist due to memory optimization, should live in InferredStatementContext. In this context the flag
+ // indicates whether or not this statement's substatement file was modified, i.e. it is not quite the same as the
+ // prototype's file.
+ final boolean isModified() {
+ return boolFlag;
+ }
+
+ final void setModified() {
+ boolFlag = true;
+ }
+
+ final void setUnmodified() {
+ boolFlag = false;
}
// These two exist only for StatementContextBase. Since we are squeezed for size, with only a single bit available
@Override
public final QName argumentAsTypeQName() {
- final Object argument = argument();
- verify(argument instanceof String, "Unexpected argument %s", argument);
- return interpretAsQName((String) argument);
+ return interpretAsQName(getRawArgument());
}
@Override
// Exists only to support {SubstatementContext,InferredStatementContext}.schemaPath()
@Deprecated
final @Nullable SchemaPath substatementGetSchemaPath() {
- SchemaPath local = schemaPath;
- if (local == null) {
- synchronized (this) {
- local = schemaPath;
- if (local == null) {
- schemaPath = local = createSchemaPath((StatementContextBase<?, ?, ?>) coerceParentContext());
- }
- }
+ if (schemaPath == null) {
+ schemaPath = createSchemaPath((StatementContextBase<?, ?, ?>) coerceParentContext());
}
-
- return local;
+ return schemaPath;
}
+ // FIXME: 7.0.0: this method's logic needs to be moved to the respective StatementSupport classes
@Deprecated
private SchemaPath createSchemaPath(final StatementContextBase<?, ?, ?> parent) {
final SchemaPath parentPath = parent.getSchemaPath();
}
if (current <= REFCOUNT_NONE) {
// Underflow, become defunct
+ // FIXME: add a global 'warn once' flag
LOG.warn("Statement refcount underflow, reference counting disabled for {}", this, new Throwable());
refcount = REFCOUNT_DEFUNCT;
return;
}
/**
- * Return {@code true} if this context has an outstanding reference.
+ * Return {@code true} if this context has no outstanding references.
*
- * @return True if this context has an outstanding reference.
+ * @return True if this context has no outstanding references.
*/
- final boolean haveRef() {
- return refcount > REFCOUNT_NONE;
+ final boolean noRefs() {
+ final int local = refcount;
+ return local < REFCOUNT_NONE || local == REFCOUNT_NONE && noParentRef();
}
private void lastDecRef() {
return true;
}
if (childRefs < 0 || childRefs >= REFCOUNT_DEFUNCT) {
+ // FIXME: add a global 'warn once' flag
LOG.warn("Negative child refcount {} cannot be stored, reference counting disabled for {}", childRefs, this,
new Throwable());
refcount = REFCOUNT_DEFUNCT;
Code Review / yangtools.git / blobdiff