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.tree.leafref;
10 import com.google.common.collect.ImmutableList;
11 import com.google.common.collect.ImmutableSet;
12 import java.util.ArrayDeque;
13 import java.util.ArrayList;
14 import java.util.Collection;
15 import java.util.Deque;
16 import java.util.HashMap;
17 import java.util.HashSet;
18 import java.util.Iterator;
19 import java.util.List;
21 import java.util.Map.Entry;
22 import java.util.Optional;
24 import java.util.function.Predicate;
25 import java.util.stream.Collectors;
26 import java.util.stream.Stream;
27 import org.opendaylight.yangtools.yang.common.QName;
28 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
31 import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
32 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
33 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
34 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
35 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
36 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
37 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
38 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
39 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
40 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
41 import org.opendaylight.yangtools.yang.data.api.schema.ValueNode;
42 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidate;
43 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeCandidateNode;
44 import org.opendaylight.yangtools.yang.data.tree.api.ModificationType;
45 import org.slf4j.Logger;
46 import org.slf4j.LoggerFactory;
48 public final class LeafRefValidation {
49 private static final Logger LOG = LoggerFactory.getLogger(LeafRefValidation.class);
50 private static final String FAILED = " -> FAILED";
51 private static final String SUCCESS = " -> OK";
53 private final Set<LeafRefContext> validatedLeafRefCtx = new HashSet<>();
54 private final List<String> errorsMessages = new ArrayList<>();
55 private final NormalizedNode root;
57 private LeafRefValidation(final NormalizedNode root) {
61 public static void validate(final DataTreeCandidate tree, final LeafRefContext rootLeafRefCtx)
62 throws LeafRefDataValidationFailedException {
63 final var root = tree.getRootNode().getDataAfter();
64 if (root.isPresent()) {
65 new LeafRefValidation(root.orElseThrow())
66 .validateChildren(rootLeafRefCtx, tree.getRootNode().getChildNodes());
70 private void validateChildren(final LeafRefContext rootLeafRefCtx, final Collection<DataTreeCandidateNode> children)
71 throws LeafRefDataValidationFailedException {
72 for (var dataTreeCandidateNode : children) {
73 if (dataTreeCandidateNode.getModificationType() != ModificationType.UNMODIFIED) {
74 final PathArgument identifier = dataTreeCandidateNode.getIdentifier();
75 final QName childQName = identifier.getNodeType();
77 final LeafRefContext referencedByCtx = rootLeafRefCtx.getReferencedChildByName(childQName);
78 final LeafRefContext referencingCtx = rootLeafRefCtx.getReferencingChildByName(childQName);
79 if (referencedByCtx != null || referencingCtx != null) {
80 validateNode(dataTreeCandidateNode, referencedByCtx, referencingCtx,
81 YangInstanceIdentifier.create(identifier));
86 if (!errorsMessages.isEmpty()) {
87 final StringBuilder message = new StringBuilder();
89 for (var errorMessage : errorsMessages) {
90 message.append(errorMessage);
93 throw new LeafRefDataValidationFailedException(message.toString(), errCount);
97 private void validateNode(final DataTreeCandidateNode node, final LeafRefContext referencedByCtx,
98 final LeafRefContext referencingCtx, final YangInstanceIdentifier current) {
100 if (node.getModificationType() == ModificationType.WRITE && node.getDataAfter().isPresent()) {
101 validateNodeData(node.getDataAfter().orElseThrow(), referencedByCtx, referencingCtx,
102 node.getModificationType(), current);
106 if (node.getModificationType() == ModificationType.DELETE && referencedByCtx != null) {
107 validateNodeData(node.getDataBefore().orElseThrow(), referencedByCtx, null, node.getModificationType(),
112 for (var childNode : node.getChildNodes()) {
113 if (childNode.getModificationType() != ModificationType.UNMODIFIED) {
114 final LeafRefContext childReferencedByCtx = getReferencedByCtxChild(referencedByCtx, childNode);
115 final LeafRefContext childReferencingCtx = getReferencingCtxChild(referencingCtx, childNode);
117 if (childReferencedByCtx != null || childReferencingCtx != null) {
118 validateNode(childNode, childReferencedByCtx,childReferencingCtx,
119 current.node(childNode.getIdentifier()));
125 private static LeafRefContext getReferencingCtxChild(final LeafRefContext referencingCtx,
126 final DataTreeCandidateNode childNode) {
127 if (referencingCtx == null) {
131 final QName childQName = childNode.getIdentifier().getNodeType();
132 LeafRefContext childReferencingCtx = referencingCtx.getReferencingChildByName(childQName);
133 if (childReferencingCtx == null) {
134 final NormalizedNode data = childNode.getDataAfter().orElseThrow();
135 if (data instanceof MapEntryNode || data instanceof UnkeyedListEntryNode) {
136 childReferencingCtx = referencingCtx;
140 return childReferencingCtx;
143 private static LeafRefContext getReferencedByCtxChild(final LeafRefContext referencedByCtx,
144 final DataTreeCandidateNode childNode) {
145 if (referencedByCtx == null) {
149 final QName childQName = childNode.getIdentifier().getNodeType();
150 LeafRefContext childReferencedByCtx = referencedByCtx.getReferencedChildByName(childQName);
151 if (childReferencedByCtx == null) {
152 final NormalizedNode data = childNode.getDataAfter().orElseThrow();
153 if (data instanceof MapEntryNode || data instanceof UnkeyedListEntryNode) {
154 childReferencedByCtx = referencedByCtx;
158 return childReferencedByCtx;
161 private void validateNodeData(final NormalizedNode node, final LeafRefContext referencedByCtx,
162 final LeafRefContext referencingCtx, final ModificationType modificationType,
163 final YangInstanceIdentifier current) {
164 if (node instanceof LeafNode) {
165 validateLeafNodeData((LeafNode<?>) node, referencedByCtx, referencingCtx, modificationType, current);
166 } else if (node instanceof LeafSetNode) {
167 validateLeafSetNodeData((LeafSetNode<?>) node, referencedByCtx, referencingCtx, modificationType, current);
168 } else if (node instanceof ChoiceNode) {
169 validateChoiceNodeData((ChoiceNode) node, referencedByCtx, referencingCtx, modificationType, current);
170 } else if (node instanceof DataContainerNode) {
171 validateDataContainerNodeData((DataContainerNode) node, referencedByCtx, referencingCtx, modificationType,
173 } else if (node instanceof MapNode) {
174 validateMapNodeData((MapNode) node, referencedByCtx, referencingCtx, modificationType, current);
176 // FIXME: check UnkeyedListNode case
179 private void validateLeafNodeData(final LeafNode<?> node, final LeafRefContext referencedByCtx,
180 final LeafRefContext referencingCtx, final ModificationType modificationType,
181 final YangInstanceIdentifier current) {
182 if (referencedByCtx != null && referencedByCtx.isReferenced()) {
183 validateLeafRefTargetNodeData(node, referencedByCtx, modificationType);
185 if (referencingCtx != null && referencingCtx.isReferencing()) {
186 validateLeafRefNodeData(node, referencingCtx, modificationType, current);
190 private void validateLeafSetNodeData(final LeafSetNode<?> node, final LeafRefContext referencedByCtx,
191 final LeafRefContext referencingCtx, final ModificationType modificationType,
192 final YangInstanceIdentifier current) {
193 if (referencedByCtx != null || referencingCtx != null) {
194 for (final NormalizedNode leafSetEntry : node.body()) {
195 if (referencedByCtx != null && referencedByCtx.isReferenced()) {
196 validateLeafRefTargetNodeData(leafSetEntry, referencedByCtx, modificationType);
198 if (referencingCtx != null && referencingCtx.isReferencing()) {
199 validateLeafRefNodeData(leafSetEntry, referencingCtx, modificationType, current);
205 private void validateChoiceNodeData(final ChoiceNode node, final LeafRefContext referencedByCtx,
206 final LeafRefContext referencingCtx, final ModificationType modificationType,
207 final YangInstanceIdentifier current) {
208 for (final DataContainerChild child : node.body()) {
209 final QName qname = child.getIdentifier().getNodeType();
210 final LeafRefContext childReferencedByCtx = referencedByCtx == null ? null
211 : findReferencedByCtxUnderChoice(referencedByCtx, qname);
212 final LeafRefContext childReferencingCtx = referencingCtx == null ? null
213 : findReferencingCtxUnderChoice(referencingCtx, qname);
214 if (childReferencedByCtx != null || childReferencingCtx != null) {
215 validateNodeData(child, childReferencedByCtx, childReferencingCtx, modificationType,
216 current.node(child.getIdentifier()));
221 private void validateDataContainerNodeData(final DataContainerNode node, final LeafRefContext referencedByCtx,
222 final LeafRefContext referencingCtx, final ModificationType modificationType,
223 final YangInstanceIdentifier current) {
224 for (final DataContainerChild child : node.body()) {
225 validateChildNodeData(child, referencedByCtx, referencingCtx, modificationType, current);
229 private void validateMapNodeData(final MapNode node, final LeafRefContext referencedByCtx,
230 final LeafRefContext referencingCtx, final ModificationType modificationType,
231 final YangInstanceIdentifier current) {
232 for (final MapEntryNode mapEntry : node.asMap().values()) {
233 final YangInstanceIdentifier mapEntryIdentifier = current.node(mapEntry.getIdentifier());
234 for (final DataContainerChild child : mapEntry.body()) {
235 validateChildNodeData(child, referencedByCtx, referencingCtx, modificationType, mapEntryIdentifier);
240 private void validateChildNodeData(final DataContainerChild child, final LeafRefContext referencedByCtx,
241 final LeafRefContext referencingCtx, final ModificationType modificationType,
242 final YangInstanceIdentifier current) {
243 final QName qname = child.getIdentifier().getNodeType();
244 final LeafRefContext childReferencedByCtx = referencedByCtx == null ? null
245 : referencedByCtx.getReferencedChildByName(qname);
246 final LeafRefContext childReferencingCtx = referencingCtx == null ? null
247 : referencingCtx.getReferencingChildByName(qname);
248 if (childReferencedByCtx != null || childReferencingCtx != null) {
249 validateNodeData(child, childReferencedByCtx, childReferencingCtx, modificationType, current.node(
250 child.getIdentifier()));
254 private static LeafRefContext findReferencingCtxUnderChoice(final LeafRefContext referencingCtx,
256 for (final LeafRefContext child : referencingCtx.getReferencingChilds().values()) {
257 final LeafRefContext referencingChildByName = child.getReferencingChildByName(qname);
258 if (referencingChildByName != null) {
259 return referencingChildByName;
265 private static LeafRefContext findReferencedByCtxUnderChoice(final LeafRefContext referencedByCtx,
267 for (final LeafRefContext child : referencedByCtx.getReferencedByChilds().values()) {
268 final LeafRefContext referencedByChildByName = child.getReferencedChildByName(qname);
269 if (referencedByChildByName != null) {
270 return referencedByChildByName;
276 private void validateLeafRefTargetNodeData(final NormalizedNode leaf, final LeafRefContext
277 referencedByCtx, final ModificationType modificationType) {
278 if (!validatedLeafRefCtx.add(referencedByCtx)) {
279 LOG.trace("Operation [{}] validate data of leafref TARGET node: name[{}] = value[{}] -> SKIP: Already "
280 + "validated", modificationType, referencedByCtx.getNodeName(), leaf.body());
284 LOG.trace("Operation [{}] validate data of leafref TARGET node: name[{}] = value[{}]", modificationType,
285 referencedByCtx.getNodeName(), leaf.body());
286 final Set<LeafRefContext> leafRefs = referencedByCtx.getAllReferencedByLeafRefCtxs().values().stream()
287 .filter(LeafRefContext::isReferencing).collect(Collectors.toSet());
288 if (leafRefs.isEmpty()) {
292 final Set<Object> leafRefTargetNodeValues = extractRootValues(referencedByCtx);
293 leafRefs.forEach(leafRefContext -> {
294 extractRootValues(leafRefContext).forEach(leafRefsValue -> {
295 if (leafRefTargetNodeValues.contains(leafRefsValue)) {
296 LOG.trace("Valid leafref value [{}] {}", leafRefsValue, SUCCESS);
300 LOG.debug("Invalid leafref value [{}] allowed values {} by validation of leafref TARGET node: {} path "
301 + "of invalid LEAFREF node: {} leafRef target path: {} {}", leafRefsValue,
302 leafRefTargetNodeValues, leaf.getIdentifier(), leafRefContext.getCurrentNodePath(),
303 leafRefContext.getAbsoluteLeafRefTargetPath(), FAILED);
304 errorsMessages.add(String.format("Invalid leafref value [%s] allowed values %s by validation of leafref"
305 + " TARGET node: %s path of invalid LEAFREF node: %s leafRef target path: %s %s", leafRefsValue,
306 leafRefTargetNodeValues, leaf.getIdentifier(), leafRefContext.getCurrentNodePath(),
307 leafRefContext.getAbsoluteLeafRefTargetPath(),
313 private Set<Object> extractRootValues(final LeafRefContext context) {
314 return computeValues(root, createPath(context.getLeafRefNodePath()), null);
317 private void validateLeafRefNodeData(final NormalizedNode leaf, final LeafRefContext referencingCtx,
318 final ModificationType modificationType, final YangInstanceIdentifier current) {
319 final Set<Object> values = computeValues(root, createPath(referencingCtx.getAbsoluteLeafRefTargetPath()),
321 if (values.contains(leaf.body())) {
322 LOG.debug("Operation [{}] validate data of LEAFREF node: name[{}] = value[{}] {}", modificationType,
323 referencingCtx.getNodeName(), leaf.body(), SUCCESS);
327 LOG.debug("Operation [{}] validate data of LEAFREF node: name[{}] = value[{}] {}", modificationType,
328 referencingCtx.getNodeName(), leaf.body(), FAILED);
329 LOG.debug("Invalid leafref value [{}] allowed values {} of LEAFREF node: {} leafRef target path: {}",
330 leaf.body(), values, leaf.getIdentifier(), referencingCtx.getAbsoluteLeafRefTargetPath());
331 errorsMessages.add(String.format("Invalid leafref value [%s] allowed values %s of LEAFREF node: %s leafRef "
332 + "target path: %s", leaf.body(), values, leaf.getIdentifier(),
333 referencingCtx.getAbsoluteLeafRefTargetPath()));
336 private Set<Object> computeValues(final NormalizedNode node, final Deque<QNameWithPredicate> path,
337 final YangInstanceIdentifier current) {
338 final HashSet<Object> values = new HashSet<>();
339 addValues(values, node, ImmutableList.of(), path, current);
343 private void addValues(final Set<Object> values, final NormalizedNode node,
344 final List<QNamePredicate> nodePredicates, final Deque<QNameWithPredicate> path,
345 final YangInstanceIdentifier current) {
346 if (node instanceof ValueNode) {
347 values.add(node.body());
350 if (node instanceof LeafSetNode<?>) {
351 for (final NormalizedNode entry : ((LeafSetNode<?>) node).body()) {
352 values.add(entry.body());
357 final QNameWithPredicate next = path.peek();
362 final PathArgument pathArgument = new NodeIdentifier(next.getQName());
363 if (node instanceof DataContainerNode) {
364 processChildNode(values, (DataContainerNode) node, pathArgument, next.getQNamePredicates(), path, current);
365 } else if (node instanceof MapNode) {
366 Stream<MapEntryNode> entries = ((MapNode) node).body().stream();
367 if (!nodePredicates.isEmpty() && current != null) {
368 entries = entries.filter(createMapEntryPredicate(nodePredicates, current));
371 entries.forEach(entry -> processChildNode(values, entry, pathArgument, next.getQNamePredicates(), path,
376 private void processChildNode(final Set<Object> values, final DataContainerNode parent,
377 final PathArgument arg, final List<QNamePredicate> nodePredicates, final Deque<QNameWithPredicate> path,
378 final YangInstanceIdentifier current) {
379 final DataContainerChild child = parent.childByArg(arg);
381 // FIXME: YANGTOOLS-901. We have SchemaContext nearby, hence we should be able to cache how to get
382 // to the leaf with with specified QName, without having to iterate through Choices.
383 // That perhaps means we should not have QNameWithPredicates, but NodeIdentifierWithPredicates as
384 // the path specification.
385 for (final DataContainerChild mixin : parent.body()) {
386 if (mixin instanceof ChoiceNode) {
387 addValues(values, mixin, nodePredicates, path, current);
391 addNextValues(values, child, nodePredicates, path, current);
395 private Predicate<MapEntryNode> createMapEntryPredicate(final List<QNamePredicate> nodePredicates,
396 final YangInstanceIdentifier current) {
397 final Map<QName, Set<?>> keyValues = new HashMap<>();
398 for (QNamePredicate predicate : nodePredicates) {
399 keyValues.put(predicate.getIdentifier(), getPathKeyExpressionValues(predicate.getPathKeyExpression(),
404 for (final Entry<QName, Object> entryKeyValue : mapEntry.getIdentifier().entrySet()) {
405 final Set<?> allowedValues = keyValues.get(entryKeyValue.getKey());
406 if (allowedValues != null && !allowedValues.contains(entryKeyValue.getValue())) {
414 private void addNextValues(final Set<Object> values, final NormalizedNode node,
415 final List<QNamePredicate> nodePredicates, final Deque<QNameWithPredicate> path,
416 final YangInstanceIdentifier current) {
417 final QNameWithPredicate element = path.pop();
419 addValues(values, node, nodePredicates, path, current);
425 private Set<?> getPathKeyExpressionValues(final LeafRefPath predicatePathKeyExpression,
426 final YangInstanceIdentifier current) {
427 return findParentNode(Optional.of(root), current).map(parent -> {
428 final Deque<QNameWithPredicate> path = createPath(predicatePathKeyExpression);
430 return computeValues(parent, path, null);
431 }).orElse(ImmutableSet.of());
434 private static Optional<NormalizedNode> findParentNode(
435 final Optional<NormalizedNode> root, final YangInstanceIdentifier path) {
436 Optional<NormalizedNode> currentNode = root;
437 final Iterator<PathArgument> pathIterator = path.getPathArguments().iterator();
438 while (pathIterator.hasNext()) {
439 final PathArgument childPathArgument = pathIterator.next();
440 if (pathIterator.hasNext() && currentNode.isPresent()) {
441 currentNode = NormalizedNodes.getDirectChild(currentNode.orElseThrow(), childPathArgument);
446 return Optional.empty();
449 private static Deque<QNameWithPredicate> createPath(final LeafRefPath path) {
450 final Deque<QNameWithPredicate> ret = new ArrayDeque<>();
451 path.getPathTowardsRoot().forEach(ret::push);