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.impl.leafref;
10 import com.google.common.base.Optional;
11 import com.google.common.collect.Iterables;
12 import java.util.Collection;
13 import java.util.HashMap;
14 import java.util.HashSet;
15 import java.util.Iterator;
16 import java.util.LinkedList;
17 import java.util.List;
19 import java.util.Map.Entry;
21 import org.opendaylight.yangtools.yang.common.QName;
22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
24 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
25 import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
26 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
27 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
28 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
29 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
30 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetNode;
31 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
32 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
33 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
34 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
35 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
36 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
37 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
38 import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
39 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
40 import org.slf4j.Logger;
41 import org.slf4j.LoggerFactory;
43 public class LeafRefValidatation {
45 private static final Logger LOG = LoggerFactory.getLogger(LeafRefValidatation.class);
46 private static final String FAILED = " -> FAILED";
47 private static final String SUCCESS = " -> OK";
49 private final DataTreeCandidate tree;
50 private final List<String> errorsMessages = new LinkedList<>();
51 private final Set<LeafRefContext> validatedLeafRefCtx = new HashSet<>();
53 private LeafRefValidatation(final DataTreeCandidate tree) {
57 public static void validate(final DataTreeCandidate tree, final LeafRefContext rootLeafRefCtx)
58 throws LeafRefDataValidationFailedException {
59 new LeafRefValidatation(tree).validate0(rootLeafRefCtx);
61 private void validate0(final LeafRefContext rootLeafRefCtx)
62 throws LeafRefDataValidationFailedException {
64 final DataTreeCandidateNode rootNode = tree.getRootNode();
66 final Collection<DataTreeCandidateNode> childNodes = rootNode.getChildNodes();
67 for (final DataTreeCandidateNode dataTreeCandidateNode : childNodes) {
69 final ModificationType modificationType = dataTreeCandidateNode
70 .getModificationType();
71 if (modificationType != ModificationType.UNMODIFIED) {
73 final PathArgument identifier = dataTreeCandidateNode.getIdentifier();
74 final QName childQName = identifier.getNodeType();
76 final LeafRefContext referencedByCtx = rootLeafRefCtx
77 .getReferencedChildByName(childQName);
78 final LeafRefContext referencingCtx = rootLeafRefCtx
79 .getReferencingChildByName(childQName);
80 if (referencedByCtx != null || referencingCtx != null) {
81 final YangInstanceIdentifier yangInstanceIdentifier = YangInstanceIdentifier
82 .create(dataTreeCandidateNode.getIdentifier());
83 validateNode(dataTreeCandidateNode, referencedByCtx,
84 referencingCtx, yangInstanceIdentifier);
90 if (!errorsMessages.isEmpty()) {
91 final StringBuilder message = new StringBuilder();
93 for (final String errorMessage : errorsMessages) {
94 message.append(errorMessage);
97 throw new LeafRefDataValidationFailedException(message.toString(), errCount);
102 private void validateNode(final DataTreeCandidateNode node, final LeafRefContext referencedByCtx,
103 final LeafRefContext referencingCtx, final YangInstanceIdentifier current) {
105 if ((node.getModificationType() == ModificationType.WRITE)
106 && node.getDataAfter().isPresent()) {
107 final Optional<NormalizedNode<?, ?>> dataAfter = node.getDataAfter();
108 final NormalizedNode<?, ?> normalizedNode = dataAfter.get();
109 validateNodeData(normalizedNode, referencedByCtx, referencingCtx,
110 node.getModificationType(), current);
114 if (node.getModificationType() == ModificationType.DELETE
115 && referencedByCtx != null) {
116 final Optional<NormalizedNode<?, ?>> dataBefor = node.getDataBefore();
117 final NormalizedNode<?, ?> normalizedNode = dataBefor.get();
118 validateNodeData(normalizedNode, referencedByCtx, null,
119 node.getModificationType(), current);
123 final Collection<DataTreeCandidateNode> childNodes = node.getChildNodes();
124 for (final DataTreeCandidateNode childNode : childNodes) {
125 final ModificationType modificationType = childNode.getModificationType();
127 if (modificationType != ModificationType.UNMODIFIED) {
129 final LeafRefContext childReferencedByCtx = getReferencedByCtxChild(
130 referencedByCtx, childNode);
131 final LeafRefContext childReferencingCtx = getReferencingCtxChild(
132 referencingCtx, childNode);
134 if (childReferencedByCtx != null || childReferencingCtx != null) {
135 final YangInstanceIdentifier childYangInstanceIdentifier = current
136 .node(childNode.getIdentifier());
137 validateNode(childNode, childReferencedByCtx,
138 childReferencingCtx, childYangInstanceIdentifier);
146 private static LeafRefContext getReferencingCtxChild(
147 final LeafRefContext referencingCtx, final DataTreeCandidateNode childNode) {
149 LeafRefContext childReferencingCtx = null;
150 if (referencingCtx != null) {
151 final PathArgument identifier = childNode.getIdentifier();
152 final QName childQName = identifier.getNodeType();
154 childReferencingCtx = referencingCtx
155 .getReferencingChildByName(childQName);
157 if (childReferencingCtx == null) {
158 final NormalizedNode<?, ?> data = childNode.getDataAfter().get();
159 if (data instanceof MapEntryNode
160 || data instanceof UnkeyedListEntryNode) {
161 childReferencingCtx = referencingCtx;
166 return childReferencingCtx;
169 private static LeafRefContext getReferencedByCtxChild(
170 final LeafRefContext referencedByCtx, final DataTreeCandidateNode childNode) {
172 LeafRefContext childReferencedByCtx = null;
173 if (referencedByCtx != null) {
174 final PathArgument identifier = childNode.getIdentifier();
175 final QName childQName = identifier.getNodeType();
177 childReferencedByCtx = referencedByCtx
178 .getReferencedChildByName(childQName);
179 if (childReferencedByCtx == null) {
180 final NormalizedNode<?, ?> data = childNode.getDataAfter().get();
181 if (data instanceof MapEntryNode
182 || data instanceof UnkeyedListEntryNode) {
183 childReferencedByCtx = referencedByCtx;
188 return childReferencedByCtx;
191 private void validateNodeData(final NormalizedNode<?, ?> node, final LeafRefContext referencedByCtx, final
192 LeafRefContext referencingCtx, final ModificationType modificationType, final YangInstanceIdentifier current) {
194 if (node instanceof LeafNode) {
195 final LeafNode<?> leaf = (LeafNode<?>) node;
197 if (referencedByCtx != null && referencedByCtx.isReferenced()) {
198 validateLeafRefTargetNodeData(leaf, referencedByCtx,
201 if (referencingCtx != null && referencingCtx.isReferencing()) {
202 validateLeafRefNodeData(leaf, referencingCtx, modificationType,
209 if (node instanceof LeafSetNode) {
210 final LeafSetNode<?> leafSet = (LeafSetNode<?>) node;
212 if (referencedByCtx == null && referencingCtx == null) {
216 final Iterable<? extends NormalizedNode<?, ?>> leafSetEntries = leafSet
218 for (final NormalizedNode<?, ?> leafSetEntry : leafSetEntries) {
219 if (referencedByCtx != null && referencedByCtx.isReferenced()) {
220 validateLeafRefTargetNodeData(leafSetEntry,
221 referencedByCtx, modificationType);
223 if (referencingCtx != null && referencingCtx.isReferencing()) {
224 validateLeafRefNodeData(leafSetEntry, referencingCtx,
225 modificationType, current);
232 if (node instanceof ChoiceNode) {
233 final ChoiceNode choice = (ChoiceNode) node;
234 final Iterable<DataContainerChild<? extends PathArgument, ?>> childs = choice
236 for (final DataContainerChild<? extends PathArgument, ?> dataContainerChild : childs) {
237 final QName qname = dataContainerChild.getNodeType();
239 LeafRefContext childReferencedByCtx = null;
240 LeafRefContext childReferencingCtx = null;
241 if (referencedByCtx != null) {
242 childReferencedByCtx = findReferencedByCtxUnderChoice(
243 referencedByCtx, qname);
245 if (referencingCtx != null) {
246 childReferencingCtx = findReferencingCtxUnderChoice(
247 referencingCtx, qname);
249 if (childReferencedByCtx != null || childReferencingCtx != null) {
250 final YangInstanceIdentifier childYangInstanceIdentifier = current
251 .node(dataContainerChild.getIdentifier());
252 validateNodeData(dataContainerChild, childReferencedByCtx,
253 childReferencingCtx, modificationType,
254 childYangInstanceIdentifier);
257 } else if (node instanceof DataContainerNode) {
258 final DataContainerNode<?> dataContainerNode = (DataContainerNode<?>) node;
259 final Iterable<DataContainerChild<? extends PathArgument, ?>> dataContainerChilds = dataContainerNode
262 for (final DataContainerChild<? extends PathArgument, ?> dataContainerChild : dataContainerChilds) {
263 final QName qname = dataContainerChild.getNodeType();
265 LeafRefContext childReferencedByCtx = null;
266 LeafRefContext childReferencingCtx = null;
267 if (referencedByCtx != null) {
268 childReferencedByCtx = referencedByCtx
269 .getReferencedChildByName(qname);
271 if (referencingCtx != null) {
272 childReferencingCtx = referencingCtx
273 .getReferencingChildByName(qname);
275 if (childReferencedByCtx != null || childReferencingCtx != null) {
276 final YangInstanceIdentifier childYangInstanceIdentifier = current
277 .node(dataContainerChild.getIdentifier());
278 validateNodeData(dataContainerChild, childReferencedByCtx,
279 childReferencingCtx, modificationType,
280 childYangInstanceIdentifier);
283 } else if (node instanceof MapNode) {
284 final MapNode map = (MapNode) node;
285 final Iterable<MapEntryNode> mapEntries = map.getValue();
286 for (final MapEntryNode mapEntry : mapEntries) {
287 final Iterable<DataContainerChild<? extends PathArgument, ?>> mapEntryNodes = mapEntry
289 final YangInstanceIdentifier mapEntryYangInstanceIdentifier = current
290 .node(mapEntry.getIdentifier());
291 for (final DataContainerChild<? extends PathArgument, ?> mapEntryNode : mapEntryNodes) {
292 final QName qname = mapEntryNode.getNodeType();
294 LeafRefContext childReferencedByCtx = null;
295 LeafRefContext childReferencingCtx = null;
296 if (referencedByCtx != null) {
297 childReferencedByCtx = referencedByCtx
298 .getReferencedChildByName(qname);
300 if (referencingCtx != null) {
301 childReferencingCtx = referencingCtx
302 .getReferencingChildByName(qname);
304 if (childReferencedByCtx != null
305 || childReferencingCtx != null) {
306 final YangInstanceIdentifier mapEntryNodeYangInstanceIdentifier = mapEntryYangInstanceIdentifier
307 .node(mapEntryNode.getIdentifier());
308 validateNodeData(mapEntryNode, childReferencedByCtx,
309 childReferencingCtx, modificationType,
310 mapEntryNodeYangInstanceIdentifier);
316 // FIXME if(node instance of UnkeyedListNode ...
319 private static LeafRefContext findReferencingCtxUnderChoice(
320 final LeafRefContext referencingCtx, final QName qname) {
322 final Map<QName, LeafRefContext> referencingChilds = referencingCtx
323 .getReferencingChilds();
324 final Set<Entry<QName, LeafRefContext>> childs = referencingChilds.entrySet();
325 for (final Entry<QName, LeafRefContext> child : childs) {
326 final LeafRefContext referencingChildByName = child.getValue()
327 .getReferencingChildByName(qname);
328 if (referencingChildByName != null) {
329 return referencingChildByName;
336 private static LeafRefContext findReferencedByCtxUnderChoice(
337 final LeafRefContext referencedByCtx, final QName qname) {
339 final Map<QName, LeafRefContext> referencedByChilds = referencedByCtx
340 .getReferencedByChilds();
341 final Set<Entry<QName, LeafRefContext>> childs = referencedByChilds
343 for (final Entry<QName, LeafRefContext> child : childs) {
344 final LeafRefContext referencedByChildByName = child.getValue()
345 .getReferencedChildByName(qname);
346 if (referencedByChildByName != null) {
347 return referencedByChildByName;
354 @SuppressWarnings("rawtypes")
355 private void validateLeafRefTargetNodeData(final NormalizedNode<?, ?> leaf, final LeafRefContext
356 referencedByCtx, final ModificationType modificationType) {
357 final Map<LeafRefContext, Set> leafRefsValues = new HashMap<>();
358 if (validatedLeafRefCtx.contains(referencedByCtx)) {
359 leafRefTargetNodeDataLog(leaf, referencedByCtx, modificationType, leafRefsValues, null);
363 final Map<QName, LeafRefContext> allReferencedByLeafRefCtxs = referencedByCtx.getAllReferencedByLeafRefCtxs();
364 final Collection<LeafRefContext> leafrefs = allReferencedByLeafRefCtxs.values();
365 for (final LeafRefContext leafRefContext : leafrefs) {
366 if (leafRefContext.isReferencing()) {
367 final Set<Object> values = new HashSet<>();
369 final SchemaPath leafRefNodeSchemaPath = leafRefContext
370 .getCurrentNodePath();
371 final LeafRefPath leafRefNodePath = LeafRefUtils
372 .schemaPathToLeafRefPath(leafRefNodeSchemaPath,
373 leafRefContext.getLeafRefContextModule());
374 final Iterable<QNameWithPredicate> pathFromRoot = leafRefNodePath
376 addValues(values, tree.getRootNode().getDataAfter(),
377 pathFromRoot, null, QNameWithPredicate.ROOT);
378 leafRefsValues.put(leafRefContext, values);
382 if (!leafRefsValues.isEmpty()) {
383 final Set<Object> leafRefTargetNodeValues = new HashSet<>();
384 final SchemaPath nodeSchemaPath = referencedByCtx.getCurrentNodePath();
385 final LeafRefPath nodePath = LeafRefUtils.schemaPathToLeafRefPath(nodeSchemaPath, referencedByCtx
386 .getLeafRefContextModule());
387 addValues(leafRefTargetNodeValues, tree.getRootNode().getDataAfter(), nodePath.getPathFromRoot(), null,
388 QNameWithPredicate.ROOT);
389 leafRefTargetNodeDataLog(leaf, referencedByCtx, modificationType, leafRefsValues,
390 leafRefTargetNodeValues);
392 leafRefTargetNodeDataLog(leaf, referencedByCtx, modificationType, null, null);
394 validatedLeafRefCtx.add(referencedByCtx);
397 private void leafRefTargetNodeDataLog(final NormalizedNode<?, ?> leaf, final LeafRefContext referencedByCtx,
398 final ModificationType modificationType, final Map<LeafRefContext, Set> leafRefsValues, final
399 Set<Object> leafRefTargetNodeValues) {
401 if (leafRefsValues != null && !leafRefsValues.isEmpty()) {
402 final Set<Entry<LeafRefContext, Set>> entrySet = leafRefsValues.entrySet();
403 LOG.debug("Operation [{}] validate data of leafref TARGET node: name[{}] = value[{}]",
404 modificationType, referencedByCtx.getNodeName(), leaf.getValue());
405 for (final Entry<LeafRefContext, Set> entry : entrySet) {
406 final LeafRefContext leafRefContext = entry.getKey();
407 final Set leafRefValuesSet = entry.getValue();
408 for (final Object leafRefsValue : leafRefValuesSet) {
409 if (leafRefTargetNodeValues != null && !leafRefTargetNodeValues.contains(leafRefsValue)) {
410 LOG.debug("Invalid leafref value [{}] allowed values {} by validation of leafref TARGET node:" +
411 " {} path of invalid LEAFREF node: {} leafRef target path: {} {}", leafRefsValue,
412 leafRefTargetNodeValues, leaf.getNodeType(), leafRefContext.getCurrentNodePath(),
413 leafRefContext.getAbsoluteLeafRefTargetPath(), FAILED);
414 errorsMessages.add(String.format("Invalid leafref value [%s] allowed values %s by validation " +
415 "of leafref TARGET node: %s path of invalid LEAFREF node: %s leafRef target " +
416 "path: %s %s", leafRefsValue, leafRefTargetNodeValues, leaf.getNodeType(),
417 leafRefContext.getCurrentNodePath(), leafRefContext.getAbsoluteLeafRefTargetPath(),
420 LOG.debug("Valid leafref value [{}] {}", leafRefsValue, SUCCESS);
424 } else if (leafRefsValues != null) {
425 LOG.debug("Operation [{}] validate data of leafref TARGET node: name[{}] = value[{}] -> SKIP: Already validated",
426 modificationType, referencedByCtx.getNodeName(), leaf.getValue());
430 private void validateLeafRefNodeData(final NormalizedNode<?, ?> leaf, final LeafRefContext referencingCtx,
431 final ModificationType modificationType, final YangInstanceIdentifier current) {
432 final HashSet<Object> values = new HashSet<>();
433 final LeafRefPath targetPath = referencingCtx.getAbsoluteLeafRefTargetPath();
434 final Iterable<QNameWithPredicate> pathFromRoot = targetPath.getPathFromRoot();
436 addValues(values, tree.getRootNode().getDataAfter(), pathFromRoot,
437 current, QNameWithPredicate.ROOT);
439 if (!values.contains(leaf.getValue())) {
440 LOG.debug("Operation [{}] validate data of LEAFREF node: name[{}] = value[{}] {}",
441 modificationType, referencingCtx.getNodeName(), leaf.getValue(), FAILED);
442 LOG.debug("Invalid leafref value [{}] allowed values {} of LEAFREF node: {} leafRef target path: {}",
443 leaf.getValue(), values, leaf.getNodeType(), referencingCtx.getAbsoluteLeafRefTargetPath());
444 errorsMessages.add(String.format("Invalid leafref value [%s] allowed values %s of LEAFREF node: %s " +
445 "leafRef target path: %s", leaf.getValue(), values, leaf.getNodeType(), referencingCtx
446 .getAbsoluteLeafRefTargetPath()));
448 LOG.debug("Operation [{}] validate data of LEAFREF node: name[{}] = value[{}] {}", modificationType,
449 referencingCtx.getNodeName(), leaf.getValue(), SUCCESS);
453 private void addValues(final Set<Object> values, final Optional<? extends NormalizedNode<?, ?>> optDataNode,
454 final Iterable<QNameWithPredicate> path, final YangInstanceIdentifier current, final QNameWithPredicate previousQName) {
456 if (!optDataNode.isPresent()) {
459 final NormalizedNode<?, ?> node = optDataNode.get();
461 if (node instanceof LeafNode || node instanceof LeafSetEntryNode) {
462 values.add(node.getValue());
464 } else if (node instanceof LeafSetNode<?>) {
465 final LeafSetNode<?> leafSetNode = (LeafSetNode<?>) node;
466 final Iterable<? extends NormalizedNode<?, ?>> entries = leafSetNode
468 for (final NormalizedNode<?, ?> entry : entries) {
469 values.add(entry.getValue());
474 final Iterator<QNameWithPredicate> iterator = path.iterator();
475 if (!iterator.hasNext()) {
478 final QNameWithPredicate qnameWithPredicate = iterator.next();
479 final QName qName = qnameWithPredicate.getQName();
480 final PathArgument pathArgument = toPathArgument(qName);
482 if (node instanceof DataContainerNode) {
483 final DataContainerNode<?> dataContainerNode = (DataContainerNode<?>) node;
484 final Optional<DataContainerChild<? extends PathArgument, ?>> child = dataContainerNode
485 .getChild(pathArgument);
487 if (child.isPresent()) {
488 addValues(values, child, nextLevel(path), current,
491 final Iterable<ChoiceNode> choiceNodes = getChoiceNodes(dataContainerNode);
492 for (final ChoiceNode choiceNode : choiceNodes) {
493 addValues(values, Optional.of(choiceNode), path, current,
498 } else if (node instanceof MapNode) {
499 final MapNode map = (MapNode) node;
500 final List<QNamePredicate> qNamePredicates = previousQName
501 .getQNamePredicates();
502 if (qNamePredicates.isEmpty() || current == null) {
503 final Iterable<MapEntryNode> value = map.getValue();
504 for (final MapEntryNode mapEntryNode : value) {
505 final Optional<DataContainerChild<? extends PathArgument, ?>> child = mapEntryNode
506 .getChild(pathArgument);
508 if (child.isPresent()) {
509 addValues(values, child, nextLevel(path), current,
512 final Iterable<ChoiceNode> choiceNodes = getChoiceNodes(mapEntryNode);
513 for (final ChoiceNode choiceNode : choiceNodes) {
514 addValues(values, Optional.of(choiceNode), path,
515 current, qnameWithPredicate);
520 final Map<QName, Set<?>> keyValues = new HashMap<>();
522 final Iterator<QNamePredicate> predicates = qNamePredicates
524 while (predicates.hasNext()) {
525 final QNamePredicate predicate = predicates.next();
526 final QName identifier = predicate.getIdentifier();
527 final LeafRefPath predicatePathKeyExpression = predicate
528 .getPathKeyExpression();
530 final Set<?> pathKeyExprValues = getPathKeyExpressionValues(
531 predicatePathKeyExpression, current);
533 keyValues.put(identifier, pathKeyExprValues);
536 final Iterable<MapEntryNode> mapEntryNodes = map.getValue();
537 for (final MapEntryNode mapEntryNode : mapEntryNodes) {
538 if (isMatchingPredicate(mapEntryNode, keyValues)) {
539 final Optional<DataContainerChild<? extends PathArgument, ?>> child = mapEntryNode
540 .getChild(pathArgument);
542 if (child.isPresent()) {
543 addValues(values, child, nextLevel(path), current,
546 final Iterable<ChoiceNode> choiceNodes = getChoiceNodes(mapEntryNode);
547 for (final ChoiceNode choiceNode : choiceNodes) {
548 addValues(values, Optional.of(choiceNode),
549 path, current, qnameWithPredicate);
558 private static Iterable<ChoiceNode> getChoiceNodes(final DataContainerNode<?> dataContainerNode) {
560 final LinkedList<ChoiceNode> choiceNodes = new LinkedList<ChoiceNode>();
562 final Iterable<DataContainerChild<? extends PathArgument, ?>> childs = dataContainerNode
564 for (final DataContainerChild<? extends PathArgument, ?> child : childs) {
565 if (child instanceof ChoiceNode) {
566 choiceNodes.add((ChoiceNode) child);
572 private static boolean isMatchingPredicate(final MapEntryNode mapEntryNode, final Map<QName, Set<?>> allowedKeyValues) {
574 final NodeIdentifierWithPredicates identifier = mapEntryNode.getIdentifier();
575 final Map<QName, Object> entryKeyValues = identifier.getKeyValues();
577 final Set<Entry<QName, Object>> entryKeyValueSet = entryKeyValues.entrySet();
578 for (final Entry<QName, Object> entryKeyValue : entryKeyValueSet) {
579 final QName key = entryKeyValue.getKey();
580 final Object value = entryKeyValue.getValue();
582 final Set<?> allowedValues = allowedKeyValues.get(key);
583 if (allowedValues != null && !allowedValues.contains(value)) {
591 private Set<?> getPathKeyExpressionValues(
592 final LeafRefPath predicatePathKeyExpression,
593 final YangInstanceIdentifier current) {
595 final Optional<NormalizedNode<?, ?>> parent = findParentNode(tree
596 .getRootNode().getDataAfter(), current);
598 final Iterable<QNameWithPredicate> predicatePathExpr = predicatePathKeyExpression
600 final Iterable<QNameWithPredicate> predicatePath = nextLevel(predicatePathExpr);
602 final Set<Object> values = new HashSet<>();
603 if (parent != null) {
604 addValues(values, parent, predicatePath, null,
605 QNameWithPredicate.ROOT);
611 private static Optional<NormalizedNode<?, ?>> findParentNode(
612 final Optional<NormalizedNode<?, ?>> root, final YangInstanceIdentifier path) {
613 Optional<NormalizedNode<?, ?>> currentNode = root;
614 final Iterator<PathArgument> pathIterator = path.getPathArguments()
616 while (pathIterator.hasNext()) {
617 final PathArgument childPathArgument = pathIterator.next();
618 if (pathIterator.hasNext() && currentNode.isPresent()) {
619 currentNode = NormalizedNodes.getDirectChild(currentNode.get(),
625 return Optional.absent();
628 private static Iterable<QNameWithPredicate> nextLevel(final Iterable<QNameWithPredicate> path) {
629 return Iterables.skip(path, 1);
632 private static PathArgument toPathArgument(final QName qName) {
633 return YangInstanceIdentifier.of(qName).getLastPathArgument();