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.rfc7950.stmt;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.annotations.Beta;
13 import com.google.common.collect.Collections2;
14 import com.google.common.collect.ImmutableList;
15 import java.util.ArrayList;
16 import java.util.Collection;
17 import java.util.HashSet;
19 import java.util.Optional;
21 import java.util.function.Predicate;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.eclipse.jdt.annotation.Nullable;
24 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
25 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
26 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
27 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
28 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
30 public abstract class EffectiveStatementBase<A, D extends DeclaredStatement<A>> implements EffectiveStatement<A, D> {
31 private final @NonNull ImmutableList<? extends EffectiveStatement<?, ?>> substatements;
36 * @param ctx context of statement.
38 protected EffectiveStatementBase(final StmtContext<A, D, ?> ctx) {
39 final Collection<StmtContext<?, ?, ?>> substatementsInit = new ArrayList<>();
42 * This dance is required to ensure that effects of 'uses' nodes are applied in the same order as
43 * the statements were defined -- i.e. if we have something like this:
62 * The reactor would first inline 'uses baz' as that definition is the first one completely resolved and then
63 * inline 'uses bar'. Here we are iterating in declaration order re-inline the statements.
65 * TODO: this really should be handled by UsesStatementSupport such that 'uses baz' would have a prerequisite
66 * of a resolved 'uses bar'.
68 Set<StmtContext<?, ?, ?>> filteredStatements = null;
69 for (final StmtContext<?, ?, ?> declaredSubstatement : ctx.declaredSubstatements()) {
70 if (declaredSubstatement.isSupportedByFeatures()) {
71 substatementsInit.add(declaredSubstatement);
73 final Collection<? extends StmtContext<?, ?, ?>> effect = declaredSubstatement.getEffectOfStatement();
74 if (!effect.isEmpty()) {
75 if (filteredStatements == null) {
76 filteredStatements = new HashSet<>();
78 filteredStatements.addAll(effect);
79 substatementsInit.addAll(effect);
84 if (filteredStatements != null) {
85 for (StmtContext<?, ?, ?> stmt : ctx.effectiveSubstatements()) {
86 if (!filteredStatements.contains(stmt)) {
87 substatementsInit.add(stmt);
91 substatementsInit.addAll(ctx.effectiveSubstatements());
94 this.substatements = ImmutableList.copyOf(initSubstatements(ctx, substatementsInit));
98 protected Collection<? extends EffectiveStatement<?, ?>> initSubstatements(final StmtContext<A, D, ?> ctx,
99 final Collection<? extends StmtContext<?, ?, ?>> substatementsInit) {
100 return initSubstatements(substatementsInit);
104 * Create a set of substatements. This method is split out so it can be overridden in
105 * ExtensionEffectiveStatementImpl to leak a not-fully-initialized instance.
107 * @param substatementsInit proposed substatements
108 * @return Filtered substatements
110 protected Collection<? extends EffectiveStatement<?, ?>> initSubstatements(
111 final Collection<? extends StmtContext<?, ?, ?>> substatementsInit) {
112 return Collections2.transform(Collections2.filter(substatementsInit,
113 StmtContext::isSupportedToBuildEffective), StmtContext::buildEffective);
117 public final <K, V, N extends IdentifierNamespace<K, V>> V get(final Class<N> namespace, final K identifier) {
118 return findAll(namespace).get(requireNonNull(identifier));
122 public final <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAll(final Class<N> namespace) {
123 return getNamespaceContents(requireNonNull(namespace)).orElse(null);
127 * Return the statement-specific contents of specified namespace, if available.
129 * @param namespace Requested namespace
130 * @return Namespace contents, if available.
133 protected <K, V, N extends IdentifierNamespace<K, V>> Optional<? extends Map<K, V>> getNamespaceContents(
134 final @NonNull Class<N> namespace) {
135 return Optional.empty();
139 public final Collection<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
140 return substatements;
143 protected final <S extends SchemaNode> S firstSchemaNode(final Class<S> type) {
144 return substatements.stream().filter(type::isInstance).findFirst().map(type::cast).orElse(null);
147 @SuppressWarnings("unchecked")
148 public final <T> Collection<T> allSubstatementsOfType(final Class<T> type) {
149 return Collection.class.cast(Collections2.filter(substatements, type::isInstance));
152 protected final <T> @Nullable T firstSubstatementOfType(final Class<T> type) {
153 return substatements.stream().filter(type::isInstance).findFirst().map(type::cast).orElse(null);
156 protected final <R> R firstSubstatementOfType(final Class<?> type, final Class<R> returnType) {
157 return substatements.stream()
158 .filter(((Predicate<Object>)type::isInstance).and(returnType::isInstance))
159 .findFirst().map(returnType::cast).orElse(null);
162 protected final EffectiveStatement<?, ?> firstEffectiveSubstatementOfType(final Class<?> type) {
163 return substatements.stream().filter(type::isInstance).findFirst().orElse(null);