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 com.google.common.collect.ImmutableMap;
16 import java.util.ArrayList;
17 import java.util.Collection;
18 import java.util.HashSet;
20 import java.util.Optional;
22 import java.util.function.Predicate;
23 import org.eclipse.jdt.annotation.NonNull;
24 import org.eclipse.jdt.annotation.Nullable;
25 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
26 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
27 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
28 import org.opendaylight.yangtools.yang.model.api.meta.IdentifierNamespace;
29 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
31 public abstract class EffectiveStatementBase<A, D extends DeclaredStatement<A>> implements EffectiveStatement<A, D> {
32 private final @NonNull ImmutableList<? extends EffectiveStatement<?, ?>> substatements;
37 * @param ctx context of statement.
39 protected EffectiveStatementBase(final StmtContext<A, D, ?> ctx) {
40 final Collection<StmtContext<?, ?, ?>> substatementsInit = new ArrayList<>();
43 * This dance is required to ensure that effects of 'uses' nodes are applied in the same order as
44 * the statements were defined -- i.e. if we have something like this:
63 * The reactor would first inline 'uses baz' as that definition is the first one completely resolved and then
64 * inline 'uses bar'. Here we are iterating in declaration order re-inline the statements.
66 * TODO: this really should be handled by UsesStatementSupport such that 'uses baz' would have a prerequisite
67 * of a resolved 'uses bar'.
69 Set<StmtContext<?, ?, ?>> filteredStatements = null;
70 for (final StmtContext<?, ?, ?> declaredSubstatement : ctx.declaredSubstatements()) {
71 if (declaredSubstatement.isSupportedByFeatures()) {
72 substatementsInit.add(declaredSubstatement);
74 final Collection<? extends StmtContext<?, ?, ?>> effect = declaredSubstatement.getEffectOfStatement();
75 if (!effect.isEmpty()) {
76 if (filteredStatements == null) {
77 filteredStatements = new HashSet<>();
79 filteredStatements.addAll(effect);
80 substatementsInit.addAll(effect);
85 if (filteredStatements != null) {
86 for (StmtContext<?, ?, ?> stmt : ctx.effectiveSubstatements()) {
87 if (!filteredStatements.contains(stmt)) {
88 substatementsInit.add(stmt);
92 substatementsInit.addAll(ctx.effectiveSubstatements());
95 this.substatements = ImmutableList.copyOf(initSubstatements(ctx, substatementsInit));
99 protected Collection<? extends EffectiveStatement<?, ?>> initSubstatements(final StmtContext<A, D, ?> ctx,
100 final Collection<? extends StmtContext<?, ?, ?>> substatementsInit) {
101 return initSubstatements(substatementsInit);
105 * Create a set of substatements. This method is split out so it can be overridden in
106 * ExtensionEffectiveStatementImpl to leak a not-fully-initialized instance.
108 * @param substatementsInit proposed substatements
109 * @return Filtered substatements
111 protected Collection<? extends EffectiveStatement<?, ?>> initSubstatements(
112 final Collection<? extends StmtContext<?, ?, ?>> substatementsInit) {
113 return Collections2.transform(Collections2.filter(substatementsInit,
114 StmtContext::isSupportedToBuildEffective), StmtContext::buildEffective);
118 public final <K, V, N extends IdentifierNamespace<K, V>> Optional<? extends V> get(final Class<N> namespace,
119 final K identifier) {
120 return Optional.ofNullable(getAll(namespace).get(requireNonNull(identifier)));
124 public final <K, V, N extends IdentifierNamespace<K, V>> Map<K, V> getAll(final Class<N> namespace) {
125 final Optional<? extends Map<K, V>> ret = getNamespaceContents(requireNonNull(namespace));
126 return ret.isPresent() ? ret.get() : ImmutableMap.of();
130 * Return the statement-specific contents of specified namespace, if available.
132 * @param namespace Requested namespace
133 * @return Namespace contents, if available.
136 protected <K, V, N extends IdentifierNamespace<K, V>> Optional<? extends Map<K, V>> getNamespaceContents(
137 final @NonNull Class<N> namespace) {
138 return Optional.empty();
142 public final Collection<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
143 return substatements;
146 protected final <S extends SchemaNode> S firstSchemaNode(final Class<S> type) {
147 return substatements.stream().filter(type::isInstance).findFirst().map(type::cast).orElse(null);
150 @SuppressWarnings("unchecked")
151 public final <T> Collection<T> allSubstatementsOfType(final Class<T> type) {
152 return Collection.class.cast(Collections2.filter(substatements, type::isInstance));
155 protected final <T> @Nullable T firstSubstatementOfType(final Class<T> type) {
156 return substatements.stream().filter(type::isInstance).findFirst().map(type::cast).orElse(null);
159 protected final <R> R firstSubstatementOfType(final Class<?> type, final Class<R> returnType) {
160 return substatements.stream()
161 .filter(((Predicate<Object>)type::isInstance).and(returnType::isInstance))
162 .findFirst().map(returnType::cast).orElse(null);
165 protected final EffectiveStatement<?, ?> firstEffectiveSubstatementOfType(final Class<?> type) {
166 return substatements.stream().filter(type::isInstance).findFirst().orElse(null);