2 * Copyright (c) 2015 Cisco Systems, Inc. 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.spi.meta;
10 import static com.google.common.base.Verify.verifyNotNull;
12 import com.google.common.base.VerifyException;
13 import com.google.common.collect.Iterables;
14 import com.google.common.collect.Streams;
15 import java.util.Collection;
17 import java.util.Optional;
18 import java.util.stream.Stream;
19 import org.eclipse.jdt.annotation.NonNull;
20 import org.eclipse.jdt.annotation.Nullable;
21 import org.opendaylight.yangtools.yang.common.QNameModule;
22 import org.opendaylight.yangtools.yang.common.YangVersion;
23 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
24 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
25 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
26 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
27 import org.opendaylight.yangtools.yang.model.api.meta.StatementDefinition;
28 import org.opendaylight.yangtools.yang.model.api.meta.StatementSource;
29 import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
30 import org.opendaylight.yangtools.yang.parser.spi.source.StatementSourceReference;
33 * An inference context associated with an instance of a statement.
35 * @param <A> Argument type
36 * @param <D> Declared Statement representation
37 * @param <E> Effective Statement representation
39 public interface StmtContext<A, D extends DeclaredStatement<A>, E extends EffectiveStatement<A, D>> {
41 * Returns the origin of the statement.
43 * @return origin of statement
45 @NonNull StatementSource getStatementSource();
48 * Returns a reference to statement source.
50 * @return reference of statement source
52 @NonNull StatementSourceReference getStatementSourceReference();
55 * See {@link StatementSupport#getPublicView()}.
57 @NonNull StatementDefinition getPublicDefinition();
60 * Return the parent statement context, or null if this is the root statement.
62 * @return context of parent of statement, or null if this is the root statement.
64 @Nullable StmtContext<?, ?, ?> getParentContext();
67 * Return the parent statement context, forcing a VerifyException if this is the root statement.
69 * @return context of parent of statement
70 * @throws VerifyException if this statement is the root statement
72 default @NonNull StmtContext<?, ?, ?> coerceParentContext() {
73 return verifyNotNull(getParentContext(), "Root context %s does not have a parent", this);
77 * Return the statement argument in literal format.
79 * @return raw statement argument string, or null if this statement does not have an argument.
81 @Nullable String rawStatementArgument();
84 * Return the statement argument in literal format.
86 * @return raw statement argument string
87 * @throws VerifyException if this statement does not have an argument
89 default @NonNull String coerceRawStatementArgument() {
90 return verifyNotNull(rawStatementArgument(), "Statement context %s does not have an argument", this);
94 * Return the statement argument.
96 * @return statement argument, or null if this statement does not have an argument
98 @Nullable A getStatementArgument();
101 * Return the statement argument in literal format.
103 * @return raw statement argument string
104 * @throws VerifyException if this statement does not have an argument
106 default @NonNull A coerceStatementArgument() {
107 return verifyNotNull(getStatementArgument(), "Statement context %s does not have an argument", this);
111 * Return the {@link SchemaPath} of this statement. Not all statements have a SchemaPath, in which case
112 * {@link Optional#empty()} is returned.
114 * @return Optional SchemaPath
116 @NonNull Optional<SchemaPath> getSchemaPath();
118 boolean isConfiguration();
120 boolean isEnabledSemanticVersioning();
123 * Return a value associated with specified key within a namespace.
125 * @param type Namespace type
127 * @param <K> namespace key type
128 * @param <V> namespace value type
129 * @param <N> namespace type
130 * @param <T> key type
131 * @return Value, or null if there is no element
132 * @throws NamespaceNotAvailableException when the namespace is not available.
134 @NonNull <K, V, T extends K, N extends IdentifierNamespace<K, V>> V getFromNamespace(Class<N> type, T key);
136 <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAllFromNamespace(Class<N> type);
138 <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAllFromCurrentStmtCtxNamespace(Class<N> type);
140 @NonNull StmtContext<?, ?, ?> getRoot();
143 * Return declared substatements. These are the statements which are explicitly written in the source model.
145 * @return Collection of declared substatements
147 @NonNull Collection<? extends StmtContext<?, ?, ?>> declaredSubstatements();
150 * Return effective substatements. These are the statements which are added as this statement's substatements
151 * complete their effective model phase.
153 * @return Collection of declared substatements
155 @NonNull Collection<? extends StmtContext<?, ?, ?>> effectiveSubstatements();
157 default Iterable<? extends StmtContext<?, ?, ?>> allSubstatements() {
158 return Iterables.concat(declaredSubstatements(), effectiveSubstatements());
161 default Stream<? extends StmtContext<?, ?, ?>> allSubstatementsStream() {
162 return Streams.concat(declaredSubstatements().stream(), effectiveSubstatements().stream());
166 * Builds {@link DeclaredStatement} for statement context.
171 * Builds {@link EffectiveStatement} for statement context.
175 boolean isSupportedToBuildEffective();
177 boolean isSupportedByFeatures();
179 Collection<? extends StmtContext<?, ?, ?>> getEffectOfStatement();
182 * FIXME: YANGTOOLS-784: the next three methods are closely related to the copy process:
183 * - getCopyHistory() is a brief summary of what went on
184 * - getOriginalContext() points to the CopyHistory.ORIGINAL
185 * - getPreviousCopyCtx() points to the immediate predecessor forming a singly-linked list terminated
186 * at getOriginalContext()
188 * When implementing YANGTOOLS-784, this needs to be taken into account and properly forwarded through
189 * intermediate MutableTrees. Also note this closely relates to current namespace context, as taken into
190 * account when creating the argument. At least parts of this are only needed during buildEffective()
191 * and hence should become arguments to that method.
195 * Return the executive summary of the copy process that has produced this context.
197 * @return A simplified summary of the copy process.
199 CopyHistory getCopyHistory();
202 * Return the statement context of the original definition, if this statement is an instantiated copy.
204 * @return Original definition, if this statement was copied.
206 Optional<StmtContext<A, D, E>> getOriginalCtx();
209 * Return the context of the previous copy of this statement -- effectively walking towards the source origin
212 * @return Context of the previous copy of this statement, if this statement has been copied.
214 Optional<StmtContext<A, D, E>> getPreviousCopyCtx();
216 ModelProcessingPhase getCompletedPhase();
219 * Return version of root statement context.
221 * @return version of root statement context
223 @NonNull YangVersion getRootVersion();
226 * An mutable view of an inference context associated with an instance of a statement.
228 * @param <A> Argument type
229 * @param <D> Declared Statement representation
230 * @param <E> Effective Statement representation
232 interface Mutable<A, D extends DeclaredStatement<A>, E extends EffectiveStatement<A, D>>
233 extends StmtContext<A, D, E> {
236 Mutable<?, ?, ?> getParentContext();
239 default Mutable<?, ?, ?> coerceParentContext() {
240 return verifyNotNull(getParentContext(), "Root context %s does not have a parent", this);
244 * Associate a value with a key within a namespace.
246 * @param type Namespace type
249 * @param <K> namespace key type
250 * @param <V> namespace value type
251 * @param <N> namespace type
252 * @param <T> key type
253 * @param <U> value type
254 * @throws NamespaceNotAvailableException when the namespace is not available.
256 <K, V, T extends K, U extends V, N extends IdentifierNamespace<K, V>> void addToNs(Class<N> type, T key,
260 Mutable<?, ?, ?> getRoot();
263 * Create a child sub-statement, which is a child of this statement, inheriting all attributes from specified
264 * child and recording copy type. Resulting object may only be added as a child of this statement.
266 * @param stmt Statement to be used as a template
267 * @param type Type of copy to record in history
268 * @param targetModule Optional new target module
269 * @return copy of statement considering {@link CopyType} (augment, uses)
271 * @throws IllegalArgumentException if stmt cannot be copied into this statement, for example because it comes
272 * from an alien implementation.
273 * @throws org.opendaylight.yangtools.yang.parser.spi.source.SourceException instance of SourceException
275 Mutable<?, ?, ?> childCopyOf(StmtContext<?, ?, ?> stmt, CopyType type, @Nullable QNameModule targetModule);
278 * Create a child sub-statement, which is a child of this statement, inheriting all attributes from specified
279 * child and recording copy type. Resulting object may only be added as a child of this statement.
281 * @param stmt Statement to be used as a template
282 * @param type Type of copy to record in history
283 * @return copy of statement considering {@link CopyType} (augment, uses)
285 * @throws IllegalArgumentException if stmt cannot be copied into this statement, for example because it comes
286 * from an alien implementation.
287 * @throws org.opendaylight.yangtools.yang.parser.spi.source.SourceException instance of SourceException
289 default Mutable<?, ?, ?> childCopyOf(final StmtContext<?, ?, ?> stmt, final CopyType type) {
290 return childCopyOf(stmt, type, null);
294 default Collection<? extends StmtContext<?, ?, ?>> declaredSubstatements() {
295 return mutableDeclaredSubstatements();
298 @NonNull Collection<? extends Mutable<?, ?, ?>> mutableDeclaredSubstatements();
301 default Collection<? extends StmtContext<?, ?, ?>> effectiveSubstatements() {
302 return mutableEffectiveSubstatements();
305 @NonNull Collection<? extends Mutable<?, ?, ?>> mutableEffectiveSubstatements();
308 * Create a new inference action to be executed during specified phase. The action cannot be cancelled
309 * and will be executed even if its definition remains incomplete. The specified phase cannot complete until
310 * this action is resolved. If the action cannot be resolved, model processing will fail.
312 * @param phase Target phase in which the action will resolved.
313 * @return A new action builder.
314 * @throws NullPointerException if the specified phase is null
316 @NonNull ModelActionBuilder newInferenceAction(@NonNull ModelProcessingPhase phase);
319 * Adds s statement to namespace map with a key.
322 * {@link StatementNamespace} child that determines namespace to be added to
324 * of type according to namespace class specification
326 * to be added to namespace map
328 <K, KT extends K, N extends StatementNamespace<K, ?, ?>> void addContext(Class<N> namespace, KT key,
329 StmtContext<?, ?, ?> stmt);
332 * Set version of root statement context.
335 * of root statement context
337 void setRootVersion(YangVersion version);
340 * Add mutable statement to seal. Each mutable statement must be sealed
341 * as the last step of statement parser processing.
343 * @param mutableStatement
344 * mutable statement which should be sealed
346 void addMutableStmtToSeal(MutableStatement mutableStatement);
349 * Add required module. Based on these dependencies are collected required sources from library sources.
352 * SourceIdentifier of module required by current root
356 * FIXME: this method is used solely during SOURCE_PRE_LINKAGE reactor phase and does not have a corresponding
357 * getter -- which makes it rather strange. At some point this method needs to be deprecated and its
358 * users migrated to use proper global namespace.
360 void addRequiredSource(SourceIdentifier dependency);
362 void addAsEffectOfStatement(StmtContext<?, ?, ?> ctx);
364 void addAsEffectOfStatement(Collection<? extends StmtContext<?, ?, ?>> ctxs);
367 * Set identifier of current root context.
370 * of current root context, must not be null
372 void setRootIdentifier(SourceIdentifier identifier);
374 void setIsSupportedToBuildEffective(boolean isSupportedToBuild);
376 // FIXME: this seems to be unused, but looks useful.
377 void setCompletedPhase(ModelProcessingPhase completedPhase);