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 java.util.Arrays;
11 import java.util.Collection;
12 import java.util.Iterator;
13 import java.util.List;
14 import java.util.NoSuchElementException;
15 import java.util.Optional;
16 import org.eclipse.jdt.annotation.NonNull;
17 import org.opendaylight.yangtools.yang.common.QName;
18 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
19 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
20 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Descendant;
23 * Interface implemented by all {@link EffectiveStatement}s which can contain a {@code schema tree} child. This tree
24 * can be walked using {@link SchemaNodeIdentifier}, looking up each component of
25 * {@link SchemaNodeIdentifier#getNodeIdentifiers()} using {@link #findSchemaTreeNode(QName)}.
27 * @param <A> Argument type
28 * @param <D> Class representing declared version of this statement.
30 public interface SchemaTreeAwareEffectiveStatement<A, D extends DeclaredStatement<A>> extends EffectiveStatement<A, D> {
32 * Enumerate all {@code schema node}s defined within this node.
34 * @return All substatements participating on the {@code schema tree}
36 @NonNull Collection<SchemaTreeEffectiveStatement<?>> schemaTreeNodes();
39 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
41 * @param qname Child identifier
42 * @return Schema tree child, or empty
43 * @throws NullPointerException if {@code qname} is null
45 @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(@NonNull QName qname);
48 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
50 * @param <E> Effective substatement type
51 * @param type Effective substatement class
52 * @param qname Child identifier
53 * @return Schema tree child, or empty
54 * @throws NullPointerException if any argument is null
56 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type, final @NonNull QName qname) {
57 return DefaultMethodHelpers.filterOptional(findSchemaTreeNode(qname), type);
61 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
63 * @param qnames Child identifiers
64 * @return Schema tree child, or empty
65 * @throws NullPointerException if {@code qnames} is null or contains a null element
66 * @throws NoSuchElementException if {@code qnames} is empty
68 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(final @NonNull QName... qnames) {
69 return findSchemaTreeNode(Arrays.asList(qnames));
73 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
75 * @param <E> Effective substatement type
76 * @param type Effective substatement class
77 * @param qnames Child identifiers
78 * @return Schema tree child, or empty
79 * @throws NullPointerException if any argument is null or if {@code qnames} contains a null element
80 * @throws NoSuchElementException if {@code qnames} is empty
82 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type, final @NonNull QName... qnames) {
83 return DefaultMethodHelpers.filterOptional(findSchemaTreeNode(Arrays.asList(qnames)), type);
87 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
89 * @param qnames Child identifiers
90 * @return Schema tree child, or empty
91 * @throws NullPointerException if {@code qnames} is null or contains a null element
92 * @throws NoSuchElementException if {@code qnames} is empty
94 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(final @NonNull List<QName> qnames) {
95 final Iterator<QName> it = qnames.iterator();
96 SchemaTreeAwareEffectiveStatement<?, ?> parent = this;
98 final var found = parent.findSchemaTreeNode(it.next());
99 if (!it.hasNext() || found.isEmpty()) {
102 final SchemaTreeEffectiveStatement<?> node = found.orElseThrow();
103 if (node instanceof SchemaTreeAwareEffectiveStatement<?, ?> aware) {
106 return Optional.empty();
112 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
114 * @param <E> Effective substatement type
115 * @param type Effective substatement class
116 * @param qnames Child identifiers
117 * @return Schema tree child, or empty
118 * @throws NullPointerException if {@code qnames} is null or contains a null element
119 * @throws NoSuchElementException if {@code qnames} is empty
121 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type,
122 final @NonNull List<QName> qnames) {
123 return DefaultMethodHelpers.filterOptional(findSchemaTreeNode(qnames), type);
127 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its
128 * {@link Descendant descendant schema node identifier}.
131 * Default implementation defers to {@link #findSchemaTreeNode(List)}.
133 * @param descendant Descendant schema node identifier
134 * @return Schema tree child, or empty
135 * @throws NullPointerException if {@code descendant} is null
137 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(
138 final @NonNull Descendant descendant) {
139 return findSchemaTreeNode(descendant.getNodeIdentifiers());
143 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its
144 * {@link Descendant descendant schema node identifier}.
147 * Default implementation defers to {@link #findSchemaTreeNode(Class, List)}.
149 * @param <E> Effective substatement type
150 * @param type Effective substatement class
151 * @param descendant Descendant schema node identifier
152 * @return Schema tree child, or empty
153 * @throws NullPointerException if {@code descendant} is null
155 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type,
156 final @NonNull Descendant descendant) {
157 return findSchemaTreeNode(type, descendant.getNodeIdentifiers());