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.tree.impl;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Verify.verifyNotNull;
13 import java.util.List;
14 import java.util.Optional;
15 import org.eclipse.jdt.annotation.NonNull;
16 import org.eclipse.jdt.annotation.Nullable;
17 import org.opendaylight.yangtools.yang.common.QName;
18 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
19 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
20 import org.opendaylight.yangtools.yang.data.api.schema.AnydataNode;
21 import org.opendaylight.yangtools.yang.data.api.schema.AnyxmlNode;
22 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
24 import org.opendaylight.yangtools.yang.data.tree.api.ConflictingModificationAppliedException;
25 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeConfiguration;
26 import org.opendaylight.yangtools.yang.data.tree.api.DataValidationFailedException;
27 import org.opendaylight.yangtools.yang.data.tree.api.ModificationType;
28 import org.opendaylight.yangtools.yang.data.tree.api.TreeType;
29 import org.opendaylight.yangtools.yang.data.tree.impl.node.TreeNode;
30 import org.opendaylight.yangtools.yang.data.tree.impl.node.Version;
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.ChoiceSchemaNode;
36 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
37 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
38 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
39 import org.opendaylight.yangtools.yang.model.api.DocumentedNode.WithStatus;
40 import org.opendaylight.yangtools.yang.model.api.LeafListSchemaNode;
41 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
42 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
43 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
44 import org.slf4j.Logger;
45 import org.slf4j.LoggerFactory;
47 abstract class SchemaAwareApplyOperation<T extends WithStatus> extends ModificationApplyOperation {
48 private static final Logger LOG = LoggerFactory.getLogger(SchemaAwareApplyOperation.class);
50 static ModificationApplyOperation from(final DataSchemaNode schemaNode,
51 final DataTreeConfiguration treeConfig) throws ExcludedDataSchemaNodeException {
52 if (!belongsToTree(treeConfig.getTreeType(), schemaNode)) {
53 throw new ExcludedDataSchemaNodeException(schemaNode + " does not belong to configuration tree");
55 if (schemaNode instanceof ContainerSchemaNode container) {
56 return ContainerModificationStrategy.of(container, treeConfig);
57 } else if (schemaNode instanceof ListSchemaNode list) {
58 return fromListSchemaNode(list, treeConfig);
59 } else if (schemaNode instanceof ChoiceSchemaNode choice) {
60 return new ChoiceModificationStrategy(choice, treeConfig);
61 } else if (schemaNode instanceof LeafListSchemaNode leafList) {
62 return MinMaxElementsValidation.from(new LeafSetModificationStrategy(leafList, treeConfig));
63 } else if (schemaNode instanceof LeafSchemaNode leaf) {
64 return new ValueNodeModificationStrategy<>(LeafNode.class, leaf);
65 } else if (schemaNode instanceof AnydataSchemaNode anydata) {
66 return new ValueNodeModificationStrategy<>(AnydataNode.class, anydata);
67 } else if (schemaNode instanceof AnyxmlSchemaNode anyxml) {
68 return new ValueNodeModificationStrategy<>(AnyxmlNode.class, anyxml);
69 } else if (schemaNode instanceof SchemaContext context) {
70 return new StructuralContainerModificationStrategy(context, treeConfig);
72 throw new IllegalStateException("Unsupported schema " + schemaNode);
76 static @Nullable AugmentationModificationStrategy from(final DataNodeContainer resolvedTree,
77 final AugmentationTarget augSchemas, final AugmentationIdentifier identifier,
78 final DataTreeConfiguration treeConfig) {
79 for (final AugmentationSchemaNode potential : augSchemas.getAvailableAugmentations()) {
80 for (final DataSchemaNode child : potential.getChildNodes()) {
81 if (identifier.getPossibleChildNames().contains(child.getQName())) {
82 return new AugmentationModificationStrategy(potential, resolvedTree, treeConfig);
90 static void checkConflicting(final ModificationPath path, final boolean condition, final String message)
91 throws ConflictingModificationAppliedException {
93 throw new ConflictingModificationAppliedException(path.toInstanceIdentifier(), message);
97 private static ModificationApplyOperation fromListSchemaNode(final ListSchemaNode schemaNode,
98 final DataTreeConfiguration treeConfig) {
99 final List<QName> keyDefinition = schemaNode.getKeyDefinition();
100 final SchemaAwareApplyOperation<ListSchemaNode> op;
101 if (keyDefinition == null || keyDefinition.isEmpty()) {
102 op = new ListModificationStrategy(schemaNode, treeConfig);
104 op = MapModificationStrategy.of(schemaNode, treeConfig);
107 return UniqueValidation.of(schemaNode, treeConfig, MinMaxElementsValidation.from(op));
110 protected static void checkNotConflicting(final ModificationPath path, final TreeNode original,
111 final TreeNode current) throws ConflictingModificationAppliedException {
112 checkConflicting(path, original.getVersion().equals(current.getVersion()),
113 "Node was replaced by other transaction.");
114 checkConflicting(path, original.getSubtreeVersion().equals(current.getSubtreeVersion()),
115 "Node children was modified by other transaction");
118 protected final @NonNull ModificationApplyOperation resolveChildOperation(final PathArgument child) {
119 final ModificationApplyOperation potential = childByArg(child);
120 checkArgument(potential != null, "Operation for child %s is not defined.", child);
125 final void checkApplicable(final ModificationPath path, final NodeModification modification,
126 final Optional<? extends TreeNode> current, final Version version) throws DataValidationFailedException {
127 switch (modification.getOperation()) {
128 case DELETE -> checkDeleteApplicable(modification, current);
129 case TOUCH -> checkTouchApplicable(path, modification, current, version);
130 case WRITE -> checkWriteApplicable(path, modification, current, version);
131 case MERGE -> checkMergeApplicable(path, modification, current, version);
135 default -> throw new UnsupportedOperationException(
136 "Suplied modification type " + modification.getOperation() + " is not supported.");
141 final void quickVerifyStructure(final NormalizedNode writtenValue) {
142 verifyValue(writtenValue);
146 final void fullVerifyStructure(final NormalizedNode writtenValue) {
147 verifyValue(writtenValue);
148 verifyValueChildren(writtenValue);
152 * Verify the a written value, without performing deeper tree validation.
154 * @param writtenValue Written value
156 abstract void verifyValue(NormalizedNode writtenValue);
159 * Verify the children implied by a written value after the value itself has been verified by
160 * {@link #verifyValue(NormalizedNode)}. Default implementation does nothing.
162 * @param writtenValue Written value
164 void verifyValueChildren(final NormalizedNode writtenValue) {
168 protected void checkMergeApplicable(final ModificationPath path, final NodeModification modification,
169 final Optional<? extends TreeNode> current, final Version version) throws DataValidationFailedException {
170 final Optional<? extends TreeNode> original = modification.getOriginal();
171 if (original.isPresent() && current.isPresent()) {
173 * We need to do conflict detection only and only if the value of leaf changed
174 * before two transactions. If value of leaf is unchanged between two transactions
175 * it should not cause transaction to fail, since result of this merge
176 * leads to same data.
178 final TreeNode orig = original.orElseThrow();
179 final TreeNode cur = current.orElseThrow();
180 if (!orig.getData().equals(cur.getData())) {
181 checkNotConflicting(path, orig, cur);
187 * Checks if write operation can be applied to current TreeNode.
188 * The operation checks if original tree node to which the modification is going to be applied exists and if
189 * current node in TreeNode structure exists.
191 * @param path Path from current node in TreeNode
192 * @param modification modification to apply
193 * @param current current node in TreeNode for modification to apply
194 * @throws DataValidationFailedException when a data dependency conflict is detected
196 private static void checkWriteApplicable(final ModificationPath path, final NodeModification modification,
197 final Optional<? extends TreeNode> current, final Version version) throws DataValidationFailedException {
198 final Optional<? extends TreeNode> original = modification.getOriginal();
199 if (original.isPresent() && current.isPresent()) {
200 checkNotConflicting(path, original.orElseThrow(), current.orElseThrow());
202 checkConflicting(path, !original.isPresent(), "Node was deleted by other transaction.");
203 checkConflicting(path, !current.isPresent(), "Node was created by other transaction.");
207 private static void checkDeleteApplicable(final NodeModification modification,
208 final Optional<? extends TreeNode> current) {
209 // Delete is always applicable, we do not expose it to subclasses
210 if (!current.isPresent()) {
211 LOG.trace("Delete operation turned to no-op on missing node {}", modification);
216 Optional<? extends TreeNode> apply(final ModifiedNode modification, final Optional<? extends TreeNode> currentMeta,
217 final Version version) {
218 return switch (modification.getOperation()) {
220 // Deletion of a non-existing node is a no-op, report it as such
221 modification.resolveModificationType(currentMeta.isPresent() ? ModificationType.DELETE
222 : ModificationType.UNMODIFIED);
223 yield modification.setSnapshot(Optional.empty());
226 checkArgument(currentMeta.isPresent(), "Metadata not available for modification %s", modification);
227 yield modification.setSnapshot(Optional.of(applyTouch(modification, currentMeta.orElseThrow(),
231 final TreeNode result;
233 if (!currentMeta.isPresent()) {
234 // This is a slight optimization: a merge on a non-existing node equals to a write. Written data
235 // structure is usually verified when the transaction is sealed. To preserve correctness, we have
236 // to run that validation here.
237 modification.resolveModificationType(ModificationType.WRITE);
238 result = applyWrite(modification, modification.getWrittenValue(), currentMeta, version);
239 fullVerifyStructure(result.getData());
241 result = applyMerge(modification, currentMeta.orElseThrow(), version);
244 yield modification.setSnapshot(Optional.of(result));
247 modification.resolveModificationType(ModificationType.WRITE);
248 yield modification.setSnapshot(Optional.of(applyWrite(modification,
249 verifyNotNull(modification.getWrittenValue()), currentMeta, version)));
252 modification.resolveModificationType(ModificationType.UNMODIFIED);
259 * Apply a merge operation. Since the result of merge differs based on the data type
260 * being modified, implementations of this method are responsible for calling
261 * {@link ModifiedNode#resolveModificationType(ModificationType)} as appropriate.
263 * @param modification Modified node
264 * @param currentMeta Store Metadata Node on which NodeModification should be applied
265 * @param version New subtree version of parent node
266 * @return A sealed TreeNode representing applied operation.
268 protected abstract TreeNode applyMerge(ModifiedNode modification, TreeNode currentMeta, Version version);
270 protected abstract TreeNode applyWrite(ModifiedNode modification, NormalizedNode newValue,
271 Optional<? extends TreeNode> currentMeta, Version version);
274 * Apply a nested operation. Since there may not actually be a nested operation
275 * to be applied, implementations of this method are responsible for calling
276 * {@link ModifiedNode#resolveModificationType(ModificationType)} as appropriate.
278 * @param modification Modified node
279 * @param currentMeta Store Metadata Node on which NodeModification should be applied
280 * @param version New subtree version of parent node
281 * @return A sealed TreeNode representing applied operation.
283 protected abstract TreeNode applyTouch(ModifiedNode modification, TreeNode currentMeta, Version version);
286 * Checks is supplied {@link NodeModification} is applicable for Subtree Modification.
288 * @param path Path to current node
289 * @param modification Node modification which should be applied.
290 * @param current Current state of data tree
291 * @throws ConflictingModificationAppliedException If subtree was changed in conflicting way
292 * @throws org.opendaylight.yangtools.yang.data.tree.api.IncorrectDataStructureException If subtree
293 * modification is not applicable (e.g. leaf node).
295 protected abstract void checkTouchApplicable(ModificationPath path, NodeModification modification,
296 Optional<? extends TreeNode> current, Version version) throws DataValidationFailedException;
299 * Return the {@link WithStatus}-subclass schema associated with this operation.
300 * @return A model node
302 abstract @NonNull T getSchema();
305 * Checks if supplied schema node belong to specified Data Tree type. All nodes belong to the operational tree,
306 * nodes in configuration tree are marked as such.
308 * @param treeType Tree Type
309 * @param node Schema node
310 * @return {@code true} if the node matches the tree type, {@code false} otherwise.
312 static final boolean belongsToTree(final TreeType treeType, final DataSchemaNode node) {
313 return treeType == TreeType.OPERATIONAL || node.effectiveConfig().orElse(Boolean.TRUE);