2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
3 * Copyright (c) 2021 PANTHEON.tech, s.r.o.
5 * This program and the accompanying materials are made available under the
6 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
7 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.yangtools.yang.data.util;
11 import static com.google.common.base.Preconditions.checkArgument;
12 import static com.google.common.base.Verify.verify;
13 import static java.util.Objects.requireNonNull;
15 import com.google.common.annotations.Beta;
16 import com.google.common.collect.Iterables;
17 import java.io.IOException;
18 import java.util.ArrayDeque;
19 import java.util.Deque;
21 import java.util.stream.Collectors;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.yangtools.yang.common.QName;
24 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
26 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
27 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeWithValue;
28 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
29 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
30 import org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeStreamWriter;
31 import org.opendaylight.yangtools.yang.model.api.AnydataSchemaNode;
32 import org.opendaylight.yangtools.yang.model.api.AnyxmlSchemaNode;
33 import org.opendaylight.yangtools.yang.model.api.AugmentationSchemaNode;
34 import org.opendaylight.yangtools.yang.model.api.AugmentationTarget;
35 import org.opendaylight.yangtools.yang.model.api.CaseSchemaNode;
36 import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
37 import org.opendaylight.yangtools.yang.model.api.ContainerLike;
38 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
39 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
40 import org.opendaylight.yangtools.yang.model.api.DocumentedNode.WithStatus;
41 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
42 import org.opendaylight.yangtools.yang.model.api.EffectiveStatementInference;
43 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
44 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
45 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
46 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
47 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
48 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
49 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
50 import org.opendaylight.yangtools.yang.model.api.stmt.ActionEffectiveStatement;
51 import org.opendaylight.yangtools.yang.model.api.stmt.ChoiceEffectiveStatement;
52 import org.opendaylight.yangtools.yang.model.api.stmt.DataTreeEffectiveStatement;
53 import org.opendaylight.yangtools.yang.model.api.stmt.RpcEffectiveStatement;
54 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
55 import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
56 import org.opendaylight.yangtools.yang.model.util.EffectiveAugmentationSchema;
57 import org.opendaylight.yangtools.yang.model.util.LeafrefResolver;
58 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
59 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
60 import org.slf4j.Logger;
61 import org.slf4j.LoggerFactory;
64 * Utility class for tracking schema state underlying a {@link NormalizedNode} structure.
67 public final class NormalizedNodeStreamWriterStack implements LeafrefResolver {
68 private static final Logger LOG = LoggerFactory.getLogger(NormalizedNodeStreamWriterStack.class);
70 private final Deque<WithStatus> schemaStack = new ArrayDeque<>();
71 private final SchemaInferenceStack dataTree;
72 private final DataNodeContainer root;
74 private NormalizedNodeStreamWriterStack(final EffectiveModelContext context) {
75 dataTree = SchemaInferenceStack.of(context);
76 root = requireNonNull(context);
79 private NormalizedNodeStreamWriterStack(final SchemaInferenceStack dataTree) {
80 this.dataTree = requireNonNull(dataTree);
81 if (!dataTree.isEmpty()) {
82 final EffectiveStatement<?, ?> current = dataTree.currentStatement();
83 checkArgument(current instanceof DataNodeContainer, "Cannot instantiate on %s", current);
85 root = (DataNodeContainer) current;
87 root = dataTree.getEffectiveModelContext();
92 * Create a new writer with the specified inference state as its root.
94 * @param root Root inference state
95 * @return A new {@link NormalizedNodeStreamWriter}
96 * @throws NullPointerException if {@code root} is null
98 public static @NonNull NormalizedNodeStreamWriterStack of(final EffectiveStatementInference root) {
99 return new NormalizedNodeStreamWriterStack(SchemaInferenceStack.ofInference(root));
103 * Create a new writer with the specified inference state as its root.
105 * @param root Root inference state
106 * @return A new {@link NormalizedNodeStreamWriter}
107 * @throws NullPointerException if {@code root} is null
109 public static @NonNull NormalizedNodeStreamWriterStack of(final Inference root) {
110 return new NormalizedNodeStreamWriterStack(root.toSchemaInferenceStack());
114 * Create a new writer at the root of specified {@link EffectiveModelContext}.
116 * @param context effective model context
117 * @return A new {@link NormalizedNodeStreamWriter}
118 * @throws NullPointerException if {@code context} is null
120 public static @NonNull NormalizedNodeStreamWriterStack of(final EffectiveModelContext context) {
121 return new NormalizedNodeStreamWriterStack(context);
125 * Create a new writer with the specified context and rooted in the specified schema path.
127 * @param context Associated {@link EffectiveModelContext}
128 * @param path schema path
129 * @return A new {@link NormalizedNodeStreamWriterStack}
130 * @throws NullPointerException if any argument is null
131 * @throws IllegalArgumentException if {@code path} does not point to a valid root
133 public static @NonNull NormalizedNodeStreamWriterStack of(final EffectiveModelContext context,
134 final Absolute path) {
135 return new NormalizedNodeStreamWriterStack(SchemaInferenceStack.of(context, path));
139 * Create a new writer with the specified context and rooted in the specified {@link YangInstanceIdentifier}..
141 * @param context Associated {@link EffectiveModelContext}
142 * @param path Normalized path
143 * @return A new {@link NormalizedNodeStreamWriterStack}
144 * @throws NullPointerException if any argument is null
145 * @throws IllegalArgumentException if {@code path} does not point to a valid root
147 public static @NonNull NormalizedNodeStreamWriterStack of(final EffectiveModelContext context,
148 final YangInstanceIdentifier path) {
149 return new NormalizedNodeStreamWriterStack(DataSchemaContextTree.from(context)
156 * Create a new writer with the specified context and rooted in the specified schema path.
158 * @param context Associated {@link EffectiveModelContext}
159 * @param operation Operation schema path
160 * @param qname Input/Output container QName
161 * @return A new {@link NormalizedNodeStreamWriter}
162 * @throws NullPointerException if any argument is null
163 * @throws IllegalArgumentException if {@code operation} does not point to an actual operation or if {@code qname}
164 * does not identify a valid root underneath it.
166 public static @NonNull NormalizedNodeStreamWriterStack ofOperation(final EffectiveModelContext context,
167 final Absolute operation, final QName qname) {
168 final SchemaInferenceStack stack = SchemaInferenceStack.of(context, operation);
169 final EffectiveStatement<?, ?> current = stack.currentStatement();
170 checkArgument(current instanceof RpcEffectiveStatement || current instanceof ActionEffectiveStatement,
171 "Path %s resolved into non-operation %s", operation, current);
172 stack.enterSchemaTree(qname);
173 return new NormalizedNodeStreamWriterStack(stack);
177 public TypeDefinition<?> resolveLeafref(final LeafrefTypeDefinition type) {
178 return dataTree.resolveLeafref(type);
181 public Object getParent() {
182 final WithStatus schema = schemaStack.peek();
183 return schema == null ? root : schema;
186 private SchemaNode enterDataTree(final PathArgument name) {
187 final QName qname = name.getNodeType();
188 final DataTreeEffectiveStatement<?> stmt = dataTree.enterDataTree(qname);
189 verify(stmt instanceof SchemaNode, "Unexpected result %s", stmt);
190 final SchemaNode ret = (SchemaNode) stmt;
191 final Object parent = getParent();
192 if (parent instanceof ChoiceSchemaNode) {
193 final DataSchemaNode check = ((ChoiceSchemaNode) parent).findDataSchemaChild(qname).orElse(null);
194 verify(check == ret, "Data tree result %s does not match choice result %s", ret, check);
199 public void startList(final PathArgument name) {
200 final SchemaNode schema = enterDataTree(name);
201 checkArgument(schema instanceof ListSchemaNode, "Node %s is not a list", schema);
202 schemaStack.push(schema);
205 public void startListItem(final PathArgument name) throws IOException {
206 final Object schema = getParent();
207 checkArgument(schema instanceof ListSchemaNode, "List item is not appropriate");
208 schemaStack.push((ListSchemaNode) schema);
211 public void startLeafNode(final NodeIdentifier name) throws IOException {
212 final SchemaNode schema = enterDataTree(name);
213 checkArgument(schema instanceof LeafSchemaNode, "Node %s is not a leaf", schema);
214 schemaStack.push(schema);
217 public LeafListSchemaNode startLeafSet(final NodeIdentifier name) {
218 final SchemaNode schema = enterDataTree(name);
219 checkArgument(schema instanceof LeafListSchemaNode, "Node %s is not a leaf-list", schema);
220 schemaStack.push(schema);
221 return (LeafListSchemaNode) schema;
224 public LeafListSchemaNode leafSetEntryNode(final QName qname) {
225 final Object parent = getParent();
226 if (parent instanceof LeafListSchemaNode) {
227 return (LeafListSchemaNode) parent;
229 checkArgument(parent instanceof DataNodeContainer, "Cannot lookup %s in parent %s", qname, parent);
230 final DataSchemaNode child = ((DataNodeContainer) parent).dataChildByName(qname);
231 checkArgument(child instanceof LeafListSchemaNode,
232 "Node %s is neither a leaf-list nor currently in a leaf-list", child);
233 return (LeafListSchemaNode) child;
236 public void startLeafSetEntryNode(final NodeWithValue<?> name) {
237 schemaStack.push(leafSetEntryNode(name.getNodeType()));
240 public ChoiceSchemaNode startChoiceNode(final NodeIdentifier name) {
241 LOG.debug("Enter choice {}", name);
242 final ChoiceEffectiveStatement stmt = dataTree.enterChoice(name.getNodeType());
243 verify(stmt instanceof ChoiceSchemaNode, "Node %s is not a choice", stmt);
244 final ChoiceSchemaNode ret = (ChoiceSchemaNode) stmt;
245 schemaStack.push(ret);
249 public SchemaNode startContainerNode(final NodeIdentifier name) {
250 LOG.debug("Enter container {}", name);
252 final SchemaNode schema;
253 if (schemaStack.isEmpty() && root instanceof NotificationDefinition) {
254 // Special case for stacks initialized at notification. We pretend the first container is contained within
256 // FIXME: 8.0.0: factor this special case out to something more reasonable, like being initialized at the
257 // Notification's parent and knowing to enterSchemaTree() instead of enterDataTree().
258 schema = (NotificationDefinition) root;
260 schema = enterDataTree(name);
261 checkArgument(schema instanceof ContainerLike, "Node %s is not a container", schema);
264 schemaStack.push(schema);
268 public void startAnyxmlNode(final NodeIdentifier name) {
269 final SchemaNode schema = enterDataTree(name);
270 checkArgument(schema instanceof AnyxmlSchemaNode, "Node %s is not anyxml", schema);
271 schemaStack.push(schema);
274 public void startAnydataNode(final NodeIdentifier name) {
275 final SchemaNode schema = enterDataTree(name);
276 checkArgument(schema instanceof AnydataSchemaNode, "Node %s is not anydata", schema);
277 schemaStack.push(schema);
280 public Object endNode() {
281 final Object ret = schemaStack.pop();
282 // If this is a data tree node, make sure it is updated. Before that, though, we need to check if this is not
283 // actually listEntry -> list or leafListEntry -> leafList exit.
284 if (!(ret instanceof AugmentationSchemaNode) && getParent() != ret) {
290 public AugmentationSchemaNode startAugmentationNode(final AugmentationIdentifier identifier) {
291 LOG.debug("Enter augmentation {}", identifier);
292 Object parent = getParent();
294 checkArgument(parent instanceof AugmentationTarget, "Augmentation not allowed under %s", parent);
295 if (parent instanceof ChoiceSchemaNode) {
296 final QName name = Iterables.get(identifier.getPossibleChildNames(), 0);
297 parent = findCaseByChild((ChoiceSchemaNode) parent, name);
299 checkArgument(parent instanceof DataNodeContainer, "Augmentation allowed only in DataNodeContainer", parent);
300 final AugmentationSchemaNode schema = findSchemaForAugment((AugmentationTarget) parent,
301 identifier.getPossibleChildNames());
302 final AugmentationSchemaNode resolvedSchema = new EffectiveAugmentationSchema(schema,
303 (DataNodeContainer) parent);
304 schemaStack.push(resolvedSchema);
305 return resolvedSchema;
308 // FIXME: 7.0.0: can we get rid of this?
309 private static @NonNull AugmentationSchemaNode findSchemaForAugment(final AugmentationTarget schema,
310 final Set<QName> qnames) {
311 for (final AugmentationSchemaNode augment : schema.getAvailableAugmentations()) {
312 if (qnames.equals(augment.getChildNodes().stream()
313 .map(DataSchemaNode::getQName)
314 .collect(Collectors.toUnmodifiableSet()))) {
319 throw new IllegalStateException(
320 "Unknown augmentation node detected, identified by: " + qnames + ", in: " + schema);
323 // FIXME: 7.0.0: can we get rid of this?
324 private static SchemaNode findCaseByChild(final ChoiceSchemaNode parent, final QName qname) {
325 for (final CaseSchemaNode caze : parent.getCases()) {
326 if (caze.dataChildByName(qname) != null) {