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.data.util;
10 import com.google.common.collect.ImmutableSet;
11 import com.google.common.collect.Iterables;
12 import java.util.List;
13 import java.util.Optional;
15 import java.util.stream.Collectors;
16 import org.eclipse.jdt.annotation.NonNull;
17 import org.eclipse.jdt.annotation.Nullable;
18 import org.opendaylight.yangtools.concepts.AbstractIdentifiable;
19 import org.opendaylight.yangtools.yang.common.QName;
20 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
21 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
23 import org.opendaylight.yangtools.yang.model.api.AnyXmlSchemaNode;
24 import org.opendaylight.yangtools.yang.model.api.AugmentationSchemaNode;
25 import org.opendaylight.yangtools.yang.model.api.AugmentationTarget;
26 import org.opendaylight.yangtools.yang.model.api.CaseSchemaNode;
27 import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
28 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
29 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
30 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
31 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
32 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
33 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
34 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
35 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
38 * Schema derived data providing necessary information for mapping between
39 * {@link org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode} and serialization format defined in RFC6020,
40 * since the mapping is not one-to-one.
42 * @param <T> Path Argument type
44 public abstract class DataSchemaContextNode<T extends PathArgument> extends AbstractIdentifiable<T> {
45 private final DataSchemaNode dataSchemaNode;
47 protected DataSchemaContextNode(final T identifier, final SchemaNode schema) {
49 if (schema instanceof DataSchemaNode) {
50 this.dataSchemaNode = (DataSchemaNode) schema;
52 this.dataSchemaNode = null;
56 public boolean isMixin() {
60 public boolean isKeyedEntry() {
64 public abstract boolean isLeaf();
66 protected Set<QName> getQNameIdentifiers() {
67 return ImmutableSet.of(getIdentifier().getNodeType());
71 * Find a child node identifier by its {@link PathArgument}.
73 * @param child Child path argument
74 * @return A child node, or null if not found
76 public abstract @Nullable DataSchemaContextNode<?> getChild(PathArgument child);
78 public abstract @Nullable DataSchemaContextNode<?> getChild(QName child);
80 public @Nullable DataSchemaNode getDataSchemaNode() {
81 return dataSchemaNode;
85 * Find a child node as identified by a {@link YangInstanceIdentifier} relative to this node.
87 * @param path Path towards the child node
88 * @return Child node if present, or empty when corresponding child is not found.
89 * @throws NullPointerException if {@code path} is null
91 public final @NonNull Optional<@NonNull DataSchemaContextNode<?>> findChild(
92 final @NonNull YangInstanceIdentifier path) {
93 DataSchemaContextNode<?> currentOp = this;
94 for (PathArgument arg : path.getPathArguments()) {
95 currentOp = currentOp.getChild(arg);
96 if (currentOp == null) {
97 return Optional.empty();
100 return Optional.of(currentOp);
103 static DataSchemaNode findChildSchemaNode(final DataNodeContainer parent, final QName child) {
104 final DataSchemaNode potential = parent.getDataChildByName(child);
105 return potential == null ? findChoice(Iterables.filter(parent.getChildNodes(), ChoiceSchemaNode.class), child)
109 static DataSchemaContextNode<?> fromSchemaAndQNameChecked(final DataNodeContainer schema, final QName child) {
110 final DataSchemaNode result = findChildSchemaNode(schema, child);
111 // We try to look up if this node was added by augmentation
112 if (result != null && schema instanceof DataSchemaNode && result.isAugmenting()) {
113 return fromAugmentation(schema, (AugmentationTarget) schema, result);
115 return fromDataSchemaNode(result);
118 // FIXME: this looks like it should be a Predicate on a stream with findFirst()
119 private static ChoiceSchemaNode findChoice(final Iterable<ChoiceSchemaNode> choices, final QName child) {
120 for (ChoiceSchemaNode choice : choices) {
121 // FIXME: this looks weird: what are we looking for again?
122 for (CaseSchemaNode caze : choice.getCases().values()) {
123 if (findChildSchemaNode(caze, child) != null) {
132 * Create AugmentationIdentifier from an AugmentationSchemaNode.
134 * @param schema Augmentation schema
135 * @return AugmentationIdentifier for the schema
136 * @throws NullPointerException if {@code schema} is null
138 public static AugmentationIdentifier augmentationIdentifierFrom(final AugmentationSchemaNode schema) {
139 return new AugmentationIdentifier(schema.getChildNodes().stream().map(DataSchemaNode::getQName)
140 .collect(Collectors.toSet()));
144 * Returns a DataContextNodeOperation for provided child node
147 * If supplied child is added by Augmentation this operation returns a
148 * DataContextNodeOperation for augmentation, otherwise returns a
149 * DataContextNodeOperation for child as call for
150 * {@link #fromDataSchemaNode(DataSchemaNode)}.
152 static @Nullable DataSchemaContextNode<?> fromAugmentation(final DataNodeContainer parent,
153 final AugmentationTarget parentAug, final DataSchemaNode child) {
154 for (AugmentationSchemaNode aug : parentAug.getAvailableAugmentations()) {
155 if (aug.findDataChildByName(child.getQName()).isPresent()) {
156 return new AugmentationContextNode(aug, parent);
159 return fromDataSchemaNode(child);
162 public static @Nullable DataSchemaContextNode<?> fromDataSchemaNode(final DataSchemaNode potential) {
163 if (potential instanceof ContainerSchemaNode) {
164 return new ContainerContextNode((ContainerSchemaNode) potential);
165 } else if (potential instanceof ListSchemaNode) {
166 return fromListSchemaNode((ListSchemaNode) potential);
167 } else if (potential instanceof LeafSchemaNode) {
168 return new LeafContextNode((LeafSchemaNode) potential);
169 } else if (potential instanceof ChoiceSchemaNode) {
170 return new ChoiceNodeContextNode((ChoiceSchemaNode) potential);
171 } else if (potential instanceof LeafListSchemaNode) {
172 return fromLeafListSchemaNode((LeafListSchemaNode) potential);
173 } else if (potential instanceof AnyXmlSchemaNode) {
174 return new AnyXmlContextNode((AnyXmlSchemaNode) potential);
179 private static DataSchemaContextNode<?> fromListSchemaNode(final ListSchemaNode potential) {
180 List<QName> keyDefinition = potential.getKeyDefinition();
181 if (keyDefinition == null || keyDefinition.isEmpty()) {
182 return new UnkeyedListMixinContextNode(potential);
184 if (potential.isUserOrdered()) {
185 return new OrderedMapMixinContextNode(potential);
187 return new UnorderedMapMixinContextNode(potential);
190 private static DataSchemaContextNode<?> fromLeafListSchemaNode(final LeafListSchemaNode potential) {
191 if (potential.isUserOrdered()) {
192 return new OrderedLeafListMixinContextNode(potential);
194 return new UnorderedLeafListMixinContextNode(potential);
197 public static DataSchemaContextNode<?> from(final SchemaContext ctx) {
198 return new ContainerContextNode(ctx);