2 * Copyright (c) 2018 Pantheon Technologies, s.r.o. 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.model.api.stmt;
10 import static java.util.Objects.requireNonNull;
11 import static org.opendaylight.yangtools.yang.model.api.stmt.DefaultMethodHelpers.filterOptional;
13 import com.google.common.annotations.Beta;
14 import java.util.Arrays;
15 import java.util.Iterator;
16 import java.util.List;
17 import java.util.NoSuchElementException;
18 import java.util.Optional;
19 import org.eclipse.jdt.annotation.NonNull;
20 import org.eclipse.jdt.annotation.NonNullByDefault;
21 import org.opendaylight.yangtools.yang.common.QName;
22 import org.opendaylight.yangtools.yang.common.SchemaNodeIdentifier;
23 import org.opendaylight.yangtools.yang.common.SchemaNodeIdentifier.Descendant;
24 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
25 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
28 * Interface implemented by all {@link EffectiveStatement}s which can contain a {@code schema tree} child. This tree
29 * can be walked using {@link SchemaNodeIdentifier}, looking up each component of
30 * {@link SchemaNodeIdentifier#getNodeIdentifiers()} using {@link #findSchemaTreeNode(QName)}.
32 * @param <A> Argument type
33 * @param <D> Class representing declared version of this statement.
34 * @author Robert Varga
37 public interface SchemaTreeAwareEffectiveStatement<A, D extends DeclaredStatement<A>> extends EffectiveStatement<A, D> {
39 * Namespace of {@code schema node}s defined within this node.
41 * @param <T> Child statement type
42 * @author Robert Varga
45 abstract class Namespace<T extends SchemaTreeEffectiveStatement<?>> extends EffectiveStatementNamespace<T> {
47 // Should never be instantiated
52 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
54 * @param qname Child identifier
55 * @return Schema tree child, or empty
56 * @throws NullPointerException if {@code qname} is null
58 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(final @NonNull QName qname) {
59 return get(Namespace.class, requireNonNull(qname));
63 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
65 * @param <E> Effective substatement type
66 * @param type Effective substatement class
67 * @param qname Child identifier
68 * @return Schema tree child, or empty
69 * @throws NullPointerException if any argument is null
71 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type, final @NonNull QName qname) {
72 return filterOptional(type, findSchemaTreeNode(qname));
76 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
78 * @param qnames Child identifiers
79 * @return Schema tree child, or empty
80 * @throws NullPointerException if {@code qnames} is null or contains a null element
81 * @throws NoSuchElementException if {@code qnames} is empty
83 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(final @NonNull QName... qnames) {
84 return findSchemaTreeNode(Arrays.asList(qnames));
88 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
90 * @param <E> Effective substatement type
91 * @param type Effective substatement class
92 * @param qnames Child identifiers
93 * @return Schema tree child, or empty
94 * @throws NullPointerException if any argument is null or if {@code qnames} contains a null element
95 * @throws NoSuchElementException if {@code qnames} is empty
97 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type, final @NonNull QName... qnames) {
98 return filterOptional(type, findSchemaTreeNode(Arrays.asList(qnames)));
102 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
104 * @param qnames Child identifiers
105 * @return Schema tree child, or empty
106 * @throws NullPointerException if {@code qnames} is null or contains a null element
107 * @throws NoSuchElementException if {@code qnames} is empty
109 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(final @NonNull List<QName> qnames) {
110 final Iterator<QName> it = qnames.iterator();
111 SchemaTreeAwareEffectiveStatement<?, ?> parent = this;
113 final Optional<SchemaTreeEffectiveStatement<?>> found = parent.findSchemaTreeNode(it.next());
114 if (!it.hasNext() || found.isEmpty()) {
117 final SchemaTreeEffectiveStatement<?> node = found.orElseThrow();
118 if (node instanceof SchemaTreeAwareEffectiveStatement) {
119 parent = (SchemaTreeAwareEffectiveStatement<?, ?>) node;
121 return Optional.empty();
127 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
129 * @param <E> Effective substatement type
130 * @param type Effective substatement class
131 * @param qnames Child identifiers
132 * @return Schema tree child, or empty
133 * @throws NullPointerException if {@code qnames} is null or contains a null element
134 * @throws NoSuchElementException if {@code qnames} is empty
136 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type,
137 final @NonNull List<QName> qnames) {
138 return filterOptional(type, findSchemaTreeNode(qnames));
142 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its
143 * {@link Descendant descendant schema node identifier}.
146 * Default implementation defers to {@link #findSchemaTreeNode(List)}.
148 * @param descendant Descendant schema node identifier
149 * @return Schema tree child, or empty
150 * @throws NullPointerException if {@code descendant} is null
152 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(
153 final @NonNull Descendant descendant) {
154 return findSchemaTreeNode(descendant.getNodeIdentifiers());
158 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its
159 * {@link Descendant descendant schema node identifier}.
162 * Default implementation defers to {@link #findSchemaTreeNode(Class, List)}.
164 * @param <E> Effective substatement type
165 * @param type Effective substatement class
166 * @param descendant Descendant schema node identifier
167 * @return Schema tree child, or empty
168 * @throws NullPointerException if {@code descendant} is null
170 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type,
171 final @NonNull Descendant descendant) {
172 return findSchemaTreeNode(type, descendant.getNodeIdentifiers());