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.model.api.meta.DeclaredStatement;
23 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
24 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Descendant;
27 * Interface implemented by all {@link EffectiveStatement}s which can contain a {@code schema tree} child. This tree
28 * can be walked using {@link SchemaNodeIdentifier}, looking up each component of
29 * {@link SchemaNodeIdentifier#getNodeIdentifiers()} using {@link #findSchemaTreeNode(QName)}.
31 * @param <A> Argument type
32 * @param <D> Class representing declared version of this statement.
33 * @author Robert Varga
36 public interface SchemaTreeAwareEffectiveStatement<A, D extends DeclaredStatement<A>> extends EffectiveStatement<A, D> {
38 * Namespace of {@code schema node}s defined within this node.
40 * @param <T> Child statement type
41 * @author Robert Varga
44 abstract class Namespace<T extends SchemaTreeEffectiveStatement<?>> extends EffectiveStatementNamespace<T> {
46 // Should never be instantiated
51 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
53 * @param qname Child identifier
54 * @return Schema tree child, or empty
55 * @throws NullPointerException if {@code qname} is null
57 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(final @NonNull QName qname) {
58 return get(Namespace.class, requireNonNull(qname));
62 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
64 * @param <E> Effective substatement type
65 * @param type Effective substatement class
66 * @param qname Child identifier
67 * @return Schema tree child, or empty
68 * @throws NullPointerException if any argument is null
70 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type, final @NonNull QName qname) {
71 return filterOptional(type, findSchemaTreeNode(qname));
75 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
77 * @param qnames Child identifiers
78 * @return Schema tree child, or empty
79 * @throws NullPointerException if {@code qnames} is null or contains a null element
80 * @throws NoSuchElementException if {@code qnames} is empty
82 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(final @NonNull QName... qnames) {
83 return findSchemaTreeNode(Arrays.asList(qnames));
87 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
89 * @param <E> Effective substatement type
90 * @param type Effective substatement class
91 * @param qnames Child identifiers
92 * @return Schema tree child, or empty
93 * @throws NullPointerException if any argument is null or if {@code qnames} contains a null element
94 * @throws NoSuchElementException if {@code qnames} is empty
96 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type, final @NonNull QName... qnames) {
97 return filterOptional(type, findSchemaTreeNode(Arrays.asList(qnames)));
101 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
103 * @param qnames Child identifiers
104 * @return Schema tree child, or empty
105 * @throws NullPointerException if {@code qnames} is null or contains a null element
106 * @throws NoSuchElementException if {@code qnames} is empty
108 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(final @NonNull List<QName> qnames) {
109 final Iterator<QName> it = qnames.iterator();
110 SchemaTreeAwareEffectiveStatement<?, ?> parent = this;
112 final Optional<SchemaTreeEffectiveStatement<?>> found = parent.findSchemaTreeNode(it.next());
113 if (!it.hasNext() || found.isEmpty()) {
116 final SchemaTreeEffectiveStatement<?> node = found.orElseThrow();
117 if (node instanceof SchemaTreeAwareEffectiveStatement) {
118 parent = (SchemaTreeAwareEffectiveStatement<?, ?>) node;
120 return Optional.empty();
126 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its QName argument.
128 * @param <E> Effective substatement type
129 * @param type Effective substatement class
130 * @param qnames Child identifiers
131 * @return Schema tree child, or empty
132 * @throws NullPointerException if {@code qnames} is null or contains a null element
133 * @throws NoSuchElementException if {@code qnames} is empty
135 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type,
136 final @NonNull List<QName> qnames) {
137 return filterOptional(type, findSchemaTreeNode(qnames));
141 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its
142 * {@link Descendant descendant schema node identifier}.
145 * Default implementation defers to {@link #findSchemaTreeNode(List)}.
147 * @param descendant Descendant schema node identifier
148 * @return Schema tree child, or empty
149 * @throws NullPointerException if {@code descendant} is null
151 default @NonNull Optional<SchemaTreeEffectiveStatement<?>> findSchemaTreeNode(
152 final @NonNull Descendant descendant) {
153 return findSchemaTreeNode(descendant.getNodeIdentifiers());
157 * Find a {@code schema tree} child {@link SchemaTreeEffectiveStatement}, as identified by its
158 * {@link Descendant descendant schema node identifier}.
161 * Default implementation defers to {@link #findSchemaTreeNode(Class, List)}.
163 * @param <E> Effective substatement type
164 * @param type Effective substatement class
165 * @param descendant Descendant schema node identifier
166 * @return Schema tree child, or empty
167 * @throws NullPointerException if {@code descendant} is null
169 default <E> @NonNull Optional<E> findSchemaTreeNode(final @NonNull Class<E> type,
170 final @NonNull Descendant descendant) {
171 return findSchemaTreeNode(type, descendant.getNodeIdentifiers());