2 * Copyright (c) 2014 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 static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Verify.verify;
12 import static java.util.Objects.requireNonNull;
14 import com.google.common.annotations.Beta;
15 import com.google.common.collect.Iterables;
16 import java.io.IOException;
17 import java.util.ArrayDeque;
18 import java.util.Deque;
19 import java.util.Optional;
21 import java.util.stream.Collectors;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.yangtools.concepts.Mutable;
24 import org.opendaylight.yangtools.yang.common.QName;
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.SchemaPath;
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.util.EffectiveAugmentationSchema;
56 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack;
57 import org.opendaylight.yangtools.yang.model.util.SchemaInferenceStack.Inference;
58 import org.slf4j.Logger;
59 import org.slf4j.LoggerFactory;
62 * Utility class for tracking schema state underlying a {@link NormalizedNode} structure.
65 public final class NormalizedNodeStreamWriterStack implements Mutable {
66 private static final Logger LOG = LoggerFactory.getLogger(NormalizedNodeStreamWriterStack.class);
68 private final Deque<WithStatus> schemaStack = new ArrayDeque<>();
69 private final SchemaInferenceStack dataTree;
70 private final DataNodeContainer root;
72 private NormalizedNodeStreamWriterStack(final EffectiveModelContext context) {
73 root = requireNonNull(context);
74 dataTree = SchemaInferenceStack.of(context);
77 private NormalizedNodeStreamWriterStack(final SchemaInferenceStack dataTree) {
78 this.dataTree = requireNonNull(dataTree);
79 if (!dataTree.isEmpty()) {
80 final EffectiveStatement<?, ?> current = dataTree.currentStatement();
81 checkArgument(current instanceof DataNodeContainer, "Cannot instantiate on %s", current);
83 root = (DataNodeContainer) current;
85 root = dataTree.getEffectiveModelContext();
90 * Create a new writer with the specified inference state as its root.
92 * @param root Root inference state
93 * @return A new {@link NormalizedNodeStreamWriter}
94 * @throws NullPointerException if {@code root} is null
96 public static @NonNull NormalizedNodeStreamWriterStack of(final EffectiveStatementInference root) {
97 return new NormalizedNodeStreamWriterStack(SchemaInferenceStack.ofInference(root));
101 * Create a new writer with the specified inference state as its root.
103 * @param root Root inference state
104 * @return A new {@link NormalizedNodeStreamWriter}
105 * @throws NullPointerException if {@code root} is null
107 public static @NonNull NormalizedNodeStreamWriterStack of(final Inference root) {
108 return new NormalizedNodeStreamWriterStack(root.toSchemaInferenceStack());
112 * Create a new writer at the root of specified {@link EffectiveModelContext}.
114 * @param context effective model context
115 * @return A new {@link NormalizedNodeStreamWriter}
116 * @throws NullPointerException if {@code context} is null
118 public static @NonNull NormalizedNodeStreamWriterStack of(final EffectiveModelContext context) {
119 return new NormalizedNodeStreamWriterStack(context);
123 * Create a new writer with the specified context and rooted in the specified schema path.
125 * @param context Associated {@link EffectiveModelContext}
126 * @param path schema path
127 * @return A new {@link NormalizedNodeStreamWriterStack}
128 * @throws NullPointerException if any argument is null
129 * @throws IllegalArgumentException if {@code path} does not point to a valid root
131 public static @NonNull NormalizedNodeStreamWriterStack of(final EffectiveModelContext context,
132 final Absolute path) {
133 return new NormalizedNodeStreamWriterStack(SchemaInferenceStack.of(context, path));
137 * Create a new writer with the specified context and rooted in the specified schema path.
139 * @param context Associated {@link EffectiveModelContext}
140 * @param path schema path
141 * @return A new {@link NormalizedNodeStreamWriterStack}
142 * @throws NullPointerException if any argument is null
143 * @throws IllegalArgumentException if {@code path} does not point to a valid root
146 public static @NonNull NormalizedNodeStreamWriterStack of(final EffectiveModelContext context,
147 final SchemaPath path) {
148 return new NormalizedNodeStreamWriterStack(SchemaInferenceStack.ofInstantiatedPath(context, path));
152 * Create a new writer with the specified context and rooted in the specified schema path.
154 * @param context Associated {@link EffectiveModelContext}
155 * @param operation Operation schema path
156 * @param qname Input/Output container QName
157 * @return A new {@link NormalizedNodeStreamWriter}
158 * @throws NullPointerException if any argument is null
159 * @throws IllegalArgumentException if {@code operation} does not point to an actual operation or if {@code qname}
160 * does not identify a valid root underneath it.
162 public static @NonNull NormalizedNodeStreamWriterStack ofOperation(final EffectiveModelContext context,
163 final Absolute operation, final QName qname) {
164 final SchemaInferenceStack stack = SchemaInferenceStack.of(context, operation);
165 final EffectiveStatement<?, ?> current = stack.currentStatement();
166 checkArgument(current instanceof RpcEffectiveStatement || current instanceof ActionEffectiveStatement,
167 "Path %s resolved into non-operation %s", operation, current);
168 stack.enterSchemaTree(qname);
169 return new NormalizedNodeStreamWriterStack(stack);
173 * Return a copy of this tracker's state as an {@link SchemaInferenceStack}.
175 * @return A SchemaInferenceStack
177 public @NonNull SchemaInferenceStack toSchemaInferenceStack() {
178 return dataTree.copy();
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);
251 final SchemaNode schema = enterDataTree(name);
252 checkArgument(schema instanceof ContainerLike || schema instanceof NotificationDefinition,
253 "Node %s is not a container nor a notification", schema);
254 schemaStack.push(schema);
258 public void startAnyxmlNode(final NodeIdentifier name) {
259 final SchemaNode schema = enterDataTree(name);
260 checkArgument(schema instanceof AnyxmlSchemaNode, "Node %s is not anyxml", schema);
261 schemaStack.push(schema);
264 public void startAnydataNode(final NodeIdentifier name) {
265 final SchemaNode schema = enterDataTree(name);
266 checkArgument(schema instanceof AnydataSchemaNode, "Node %s is not anydata", schema);
267 schemaStack.push(schema);
270 public Object endNode() {
271 final Object ret = schemaStack.pop();
272 // If this is a data tree node, make sure it is updated. Before that, though, we need to check if this is not
273 // actually listEntry -> list or leafListEntry -> leafList exit.
274 if (!(ret instanceof AugmentationSchemaNode) && getParent() != ret) {
280 public AugmentationSchemaNode startAugmentationNode(final AugmentationIdentifier identifier) {
281 LOG.debug("Enter augmentation {}", identifier);
282 Object parent = getParent();
284 checkArgument(parent instanceof AugmentationTarget, "Augmentation not allowed under %s", parent);
285 if (parent instanceof ChoiceSchemaNode) {
286 final QName name = Iterables.get(identifier.getPossibleChildNames(), 0);
287 parent = findCaseByChild((ChoiceSchemaNode) parent, name);
289 checkArgument(parent instanceof DataNodeContainer, "Augmentation allowed only in DataNodeContainer", parent);
290 final AugmentationSchemaNode schema = findSchemaForAugment((AugmentationTarget) parent,
291 identifier.getPossibleChildNames());
292 final AugmentationSchemaNode resolvedSchema = EffectiveAugmentationSchema.create(schema,
293 (DataNodeContainer) parent);
294 schemaStack.push(resolvedSchema);
295 return resolvedSchema;
298 // FIXME: 7.0.0: can we get rid of this?
299 private static @NonNull AugmentationSchemaNode findSchemaForAugment(final AugmentationTarget schema,
300 final Set<QName> qnames) {
301 for (final AugmentationSchemaNode augment : schema.getAvailableAugmentations()) {
302 if (qnames.equals(augment.getChildNodes().stream()
303 .map(DataSchemaNode::getQName)
304 .collect(Collectors.toUnmodifiableSet()))) {
309 throw new IllegalStateException(
310 "Unknown augmentation node detected, identified by: " + qnames + ", in: " + schema);
313 // FIXME: 7.0.0: can we get rid of this?
314 private static SchemaNode findCaseByChild(final ChoiceSchemaNode parent, final QName qname) {
315 for (final CaseSchemaNode caze : parent.getCases()) {
316 final Optional<DataSchemaNode> potential = caze.findDataChildByName(qname);
317 if (potential.isPresent()) {