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.controller.md.sal.common.impl.util.compat;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Preconditions.checkNotNull;
13 import java.util.Collections;
14 import java.util.HashSet;
15 import java.util.List;
17 import java.util.Map.Entry;
19 import java.util.concurrent.ConcurrentHashMap;
21 import org.opendaylight.yangtools.concepts.Identifiable;
22 import org.opendaylight.yangtools.yang.common.QName;
23 import org.opendaylight.yangtools.yang.data.api.CompositeNode;
24 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.AugmentationIdentifier;
25 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.NodeIdentifier;
26 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.NodeIdentifierWithPredicates;
27 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.NodeWithValue;
28 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.PathArgument;
29 import org.opendaylight.yangtools.yang.data.api.Node;
30 import org.opendaylight.yangtools.yang.data.api.SimpleNode;
31 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
32 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
33 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
34 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
35 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeAttrBuilder;
36 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeContainerBuilder;
37 import org.opendaylight.yangtools.yang.model.api.AugmentationSchema;
38 import org.opendaylight.yangtools.yang.model.api.AugmentationTarget;
39 import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
40 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
41 import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
42 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
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.SchemaContext;
48 import com.google.common.base.Optional;
49 import com.google.common.collect.FluentIterable;
50 import com.google.common.collect.ImmutableMap;
51 import com.google.common.collect.ImmutableSet;
53 public abstract class DataNormalizationOperation<T extends PathArgument> implements Identifiable<T> {
55 private final T identifier;
58 public T getIdentifier() {
62 protected DataNormalizationOperation(final T identifier) {
64 this.identifier = identifier;
67 public boolean isMixin() {
72 public boolean isKeyedEntry() {
76 protected Set<QName> getQNameIdentifiers() {
77 return Collections.singleton(identifier.getNodeType());
80 public abstract DataNormalizationOperation<?> getChild(final PathArgument child) throws DataNormalizationException;
82 public abstract DataNormalizationOperation<?> getChild(QName child) throws DataNormalizationException;
84 public abstract NormalizedNode<?, ?> normalize(Node<?> legacyData);
86 private static abstract class SimpleTypeNormalization<T extends PathArgument> extends DataNormalizationOperation<T> {
88 protected SimpleTypeNormalization(final T identifier) {
93 public NormalizedNode<?, ?> normalize(final Node<?> legacyData) {
94 checkArgument(legacyData != null);
95 checkArgument(legacyData instanceof SimpleNode<?>);
96 return normalizeImpl((SimpleNode<?>) legacyData);
99 protected abstract NormalizedNode<?, ?> normalizeImpl(SimpleNode<?> node);
102 public DataNormalizationOperation<?> getChild(final PathArgument child) {
107 public DataNormalizationOperation<?> getChild(final QName child) {
112 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
118 private static final class LeafNormalization extends SimpleTypeNormalization<NodeIdentifier> {
120 protected LeafNormalization(final NodeIdentifier identifier) {
125 protected NormalizedNode<?, ?> normalizeImpl(final SimpleNode<?> node) {
126 return ImmutableNodes.leafNode(node.getNodeType(), node.getValue());
131 private static final class LeafListEntryNormalization extends SimpleTypeNormalization<NodeWithValue> {
133 public LeafListEntryNormalization(final LeafListSchemaNode potential) {
134 super(new NodeWithValue(potential.getQName(), null));
138 protected NormalizedNode<?, ?> normalizeImpl(final SimpleNode<?> node) {
139 NodeWithValue nodeId = new NodeWithValue(node.getNodeType(), node.getValue());
140 return Builders.leafSetEntryBuilder().withNodeIdentifier(nodeId).withValue(node.getValue()).build();
145 public boolean isKeyedEntry() {
150 private static abstract class CompositeNodeNormalizationOperation<T extends PathArgument> extends
151 DataNormalizationOperation<T> {
153 protected CompositeNodeNormalizationOperation(final T identifier) {
157 @SuppressWarnings({ "rawtypes", "unchecked" })
159 public final NormalizedNode<?, ?> normalize(final Node<?> legacyData) {
160 checkArgument(legacyData != null);
161 if (!isMixin() && getIdentifier().getNodeType() != null) {
162 checkArgument(getIdentifier().getNodeType().equals(legacyData.getNodeType()),
163 "Node QName must be %s was %s", getIdentifier().getNodeType(), legacyData.getNodeType());
165 checkArgument(legacyData instanceof CompositeNode, "Node %s should be composite", legacyData);
166 CompositeNode compositeNode = (CompositeNode) legacyData;
167 NormalizedNodeContainerBuilder builder = createBuilder(compositeNode);
169 Set<DataNormalizationOperation<?>> usedMixins = new HashSet<>();
170 for (Node<?> childLegacy : compositeNode.getValue()) {
171 final DataNormalizationOperation childOp;
174 childOp = getChild(childLegacy.getNodeType());
175 } catch (DataNormalizationException e) {
176 throw new IllegalArgumentException(String.format("Failed to normalize data %s", compositeNode.getValue()), e);
179 // We skip unknown nodes if this node is mixin since
180 // it's nodes and parent nodes are interleaved
181 if (childOp == null && isMixin()) {
185 checkArgument(childOp != null, "Node %s is not allowed inside %s", childLegacy.getNodeType(),
187 if (childOp.isMixin()) {
188 if (usedMixins.contains(childOp)) {
189 // We already run / processed that mixin, so to avoid
190 // duplicity we are skipping next nodes.
193 builder.addChild(childOp.normalize(compositeNode));
194 usedMixins.add(childOp);
196 builder.addChild(childOp.normalize(childLegacy));
199 return builder.build();
202 @SuppressWarnings("rawtypes")
203 protected abstract NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode);
207 private static abstract class DataContainerNormalizationOperation<T extends PathArgument> extends
208 CompositeNodeNormalizationOperation<T> {
210 private final DataNodeContainer schema;
211 private final Map<QName, DataNormalizationOperation<?>> byQName;
212 private final Map<PathArgument, DataNormalizationOperation<?>> byArg;
214 protected DataContainerNormalizationOperation(final T identifier, final DataNodeContainer schema) {
216 this.schema = schema;
217 this.byArg = new ConcurrentHashMap<>();
218 this.byQName = new ConcurrentHashMap<>();
222 public DataNormalizationOperation<?> getChild(final PathArgument child) throws DataNormalizationException {
223 DataNormalizationOperation<?> potential = byArg.get(child);
224 if (potential != null) {
227 potential = fromLocalSchema(child);
228 return register(potential);
231 private DataNormalizationOperation<?> fromLocalSchema(final PathArgument child) throws DataNormalizationException {
232 if (child instanceof AugmentationIdentifier) {
233 return fromSchemaAndQNameChecked(schema, ((AugmentationIdentifier) child).getPossibleChildNames()
236 return fromSchemaAndQNameChecked(schema, child.getNodeType());
240 public DataNormalizationOperation<?> getChild(final QName child) throws DataNormalizationException {
241 DataNormalizationOperation<?> potential = byQName.get(child);
242 if (potential != null) {
245 potential = fromLocalSchemaAndQName(schema, child);
246 return register(potential);
249 protected DataNormalizationOperation<?> fromLocalSchemaAndQName(final DataNodeContainer schema2, final QName child) throws DataNormalizationException {
250 return fromSchemaAndQNameChecked(schema2, child);
253 private DataNormalizationOperation<?> register(final DataNormalizationOperation<?> potential) {
254 if (potential != null) {
255 byArg.put(potential.getIdentifier(), potential);
256 for (QName qName : potential.getQNameIdentifiers()) {
257 byQName.put(qName, potential);
265 private static final class ListItemNormalization extends
266 DataContainerNormalizationOperation<NodeIdentifierWithPredicates> {
268 private final List<QName> keyDefinition;
270 protected ListItemNormalization(final NodeIdentifierWithPredicates identifier, final ListSchemaNode schema) {
271 super(identifier, schema);
272 keyDefinition = schema.getKeyDefinition();
276 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
277 ImmutableMap.Builder<QName, Object> keys = ImmutableMap.builder();
278 for (QName key : keyDefinition) {
280 SimpleNode<?> valueNode = checkNotNull(compositeNode.getFirstSimpleByName(key),
281 "List node %s MUST contain leaf %s with value.", getIdentifier().getNodeType(), key);
282 keys.put(key, valueNode.getValue());
285 return Builders.mapEntryBuilder().withNodeIdentifier(
286 new NodeIdentifierWithPredicates(getIdentifier().getNodeType(), keys.build()));
290 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
291 DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> builder = Builders
292 .mapEntryBuilder().withNodeIdentifier((NodeIdentifierWithPredicates) currentArg);
293 for (Entry<QName, Object> keyValue : ((NodeIdentifierWithPredicates) currentArg).getKeyValues().entrySet()) {
294 builder.addChild(Builders.leafBuilder()
296 .withNodeIdentifier(new NodeIdentifier(keyValue.getKey())).withValue(keyValue.getValue())
299 return builder.build();
304 public boolean isKeyedEntry() {
309 private static final class UnkeyedListItemNormalization extends DataContainerNormalizationOperation<NodeIdentifier> {
311 protected UnkeyedListItemNormalization(final ListSchemaNode schema) {
312 super(new NodeIdentifier(schema.getQName()), schema);
316 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
317 return Builders.unkeyedListEntryBuilder().withNodeIdentifier(getIdentifier());
321 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
322 return Builders.unkeyedListEntryBuilder().withNodeIdentifier((NodeIdentifier) currentArg).build();
327 private static final class ContainerNormalization extends DataContainerNormalizationOperation<NodeIdentifier> {
329 protected ContainerNormalization(final ContainerSchemaNode schema) {
330 super(new NodeIdentifier(schema.getQName()), schema);
334 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
335 return Builders.containerBuilder().withNodeIdentifier(getIdentifier());
339 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
340 return Builders.containerBuilder().withNodeIdentifier((NodeIdentifier) currentArg).build();
345 private static abstract class MixinNormalizationOp<T extends PathArgument> extends
346 CompositeNodeNormalizationOperation<T> {
348 protected MixinNormalizationOp(final T identifier) {
353 public final boolean isMixin() {
360 private static final class OrderedLeafListMixinNormalization extends UnorderedLeafListMixinNormalization {
363 public OrderedLeafListMixinNormalization(final LeafListSchemaNode potential) {
368 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
369 return Builders.orderedLeafSetBuilder().withNodeIdentifier(getIdentifier());
373 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
374 return Builders.orderedLeafSetBuilder().withNodeIdentifier(getIdentifier()).build();
378 private static class UnorderedLeafListMixinNormalization extends MixinNormalizationOp<NodeIdentifier> {
380 private final DataNormalizationOperation<?> innerOp;
382 public UnorderedLeafListMixinNormalization(final LeafListSchemaNode potential) {
383 super(new NodeIdentifier(potential.getQName()));
384 innerOp = new LeafListEntryNormalization(potential);
388 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
389 return Builders.leafSetBuilder().withNodeIdentifier(getIdentifier());
393 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
394 return Builders.leafSetBuilder().withNodeIdentifier(getIdentifier()).build();
398 public DataNormalizationOperation<?> getChild(final PathArgument child) {
399 if (child instanceof NodeWithValue) {
406 public DataNormalizationOperation<?> getChild(final QName child) {
407 if (getIdentifier().getNodeType().equals(child)) {
414 private static final class AugmentationNormalization extends DataContainerNormalizationOperation<AugmentationIdentifier> {
416 public AugmentationNormalization(final AugmentationSchema augmentation, final DataNodeContainer schema) {
418 super(augmentationIdentifierFrom(augmentation), augmentationProxy(augmentation,schema));
422 public boolean isMixin() {
429 protected DataNormalizationOperation<?> fromLocalSchemaAndQName(final DataNodeContainer schema, final QName child)
430 throws DataNormalizationException {
431 Optional<DataSchemaNode> potential = findChildSchemaNode(schema, child);
432 if (!potential.isPresent()) {
436 DataSchemaNode result = potential.get();
437 // We try to look up if this node was added by augmentation
438 if ((schema instanceof DataSchemaNode) && result.isAugmenting()) {
439 return fromAugmentation(schema, (AugmentationTarget) schema, result);
441 return fromDataSchemaNode(result);
445 protected Set<QName> getQNameIdentifiers() {
446 return getIdentifier().getPossibleChildNames();
449 @SuppressWarnings("rawtypes")
451 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
452 return Builders.augmentationBuilder().withNodeIdentifier(getIdentifier());
456 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
457 return Builders.augmentationBuilder().withNodeIdentifier(getIdentifier()).build();
462 private static class UnorderedMapMixinNormalization extends MixinNormalizationOp<NodeIdentifier> {
464 private final ListItemNormalization innerNode;
466 public UnorderedMapMixinNormalization(final ListSchemaNode list) {
467 super(new NodeIdentifier(list.getQName()));
468 this.innerNode = new ListItemNormalization(new NodeIdentifierWithPredicates(list.getQName(),
469 Collections.<QName, Object> emptyMap()), list);
472 @SuppressWarnings("rawtypes")
474 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
475 return Builders.mapBuilder().withNodeIdentifier(getIdentifier());
479 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
480 return Builders.mapBuilder().withNodeIdentifier(getIdentifier()).build();
484 public DataNormalizationOperation<?> getChild(final PathArgument child) {
485 if (child.getNodeType().equals(getIdentifier().getNodeType())) {
492 public DataNormalizationOperation<?> getChild(final QName child) {
493 if (getIdentifier().getNodeType().equals(child)) {
502 private static class UnkeyedListMixinNormalization extends MixinNormalizationOp<NodeIdentifier> {
504 private final UnkeyedListItemNormalization innerNode;
506 public UnkeyedListMixinNormalization(final ListSchemaNode list) {
507 super(new NodeIdentifier(list.getQName()));
508 this.innerNode = new UnkeyedListItemNormalization(list);
511 @SuppressWarnings("rawtypes")
513 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
514 return Builders.unkeyedListBuilder().withNodeIdentifier(getIdentifier());
518 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
519 return Builders.unkeyedListBuilder().withNodeIdentifier(getIdentifier()).build();
523 public DataNormalizationOperation<?> getChild(final PathArgument child) {
524 if (child.getNodeType().equals(getIdentifier().getNodeType())) {
531 public DataNormalizationOperation<?> getChild(final QName child) {
532 if (getIdentifier().getNodeType().equals(child)) {
540 private static final class OrderedMapMixinNormalization extends UnorderedMapMixinNormalization {
542 public OrderedMapMixinNormalization(final ListSchemaNode list) {
546 @SuppressWarnings("rawtypes")
548 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
549 return Builders.orderedMapBuilder().withNodeIdentifier(getIdentifier());
553 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
554 return Builders.orderedMapBuilder().withNodeIdentifier(getIdentifier()).build();
559 private static class ChoiceNodeNormalization extends MixinNormalizationOp<NodeIdentifier> {
561 private final ImmutableMap<QName, DataNormalizationOperation<?>> byQName;
562 private final ImmutableMap<PathArgument, DataNormalizationOperation<?>> byArg;
564 protected ChoiceNodeNormalization(final org.opendaylight.yangtools.yang.model.api.ChoiceNode schema) {
565 super(new NodeIdentifier(schema.getQName()));
566 ImmutableMap.Builder<QName, DataNormalizationOperation<?>> byQNameBuilder = ImmutableMap.builder();
567 ImmutableMap.Builder<PathArgument, DataNormalizationOperation<?>> byArgBuilder = ImmutableMap.builder();
569 for (ChoiceCaseNode caze : schema.getCases()) {
570 for (DataSchemaNode cazeChild : caze.getChildNodes()) {
571 DataNormalizationOperation<?> childOp = fromDataSchemaNode(cazeChild);
572 byArgBuilder.put(childOp.getIdentifier(), childOp);
573 for (QName qname : childOp.getQNameIdentifiers()) {
574 byQNameBuilder.put(qname, childOp);
578 byQName = byQNameBuilder.build();
579 byArg = byArgBuilder.build();
583 public DataNormalizationOperation<?> getChild(final PathArgument child) {
584 return byArg.get(child);
588 public DataNormalizationOperation<?> getChild(final QName child) {
589 return byQName.get(child);
593 protected NormalizedNodeContainerBuilder createBuilder(final CompositeNode compositeNode) {
594 return Builders.choiceBuilder().withNodeIdentifier(getIdentifier());
598 public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
599 return Builders.choiceBuilder().withNodeIdentifier(getIdentifier()).build();
603 private static final Optional<DataSchemaNode> findChildSchemaNode(final DataNodeContainer parent,final QName child) {
604 DataSchemaNode potential = parent.getDataChildByName(child);
605 if (potential == null) {
606 Iterable<org.opendaylight.yangtools.yang.model.api.ChoiceNode> choices = FluentIterable.from(
607 parent.getChildNodes()).filter(org.opendaylight.yangtools.yang.model.api.ChoiceNode.class);
608 potential = findChoice(choices, child);
610 return Optional.fromNullable(potential);
613 private static DataNormalizationOperation<?> fromSchemaAndQNameChecked(final DataNodeContainer schema,
614 final QName child) throws DataNormalizationException {
616 Optional<DataSchemaNode> potential = findChildSchemaNode(schema, child);
617 if (!potential.isPresent()) {
618 throw new DataNormalizationException(String.format("Supplied QName %s is not valid according to schema %s, potential children nodes: %s", child, schema,schema.getChildNodes()));
621 DataSchemaNode result = potential.get();
622 // We try to look up if this node was added by augmentation
623 if ((schema instanceof DataSchemaNode) && result.isAugmenting()) {
624 return fromAugmentation(schema, (AugmentationTarget) schema, result);
626 return fromDataSchemaNode(result);
629 private static org.opendaylight.yangtools.yang.model.api.ChoiceNode findChoice(
630 final Iterable<org.opendaylight.yangtools.yang.model.api.ChoiceNode> choices, final QName child) {
631 org.opendaylight.yangtools.yang.model.api.ChoiceNode foundChoice = null;
632 choiceLoop: for (org.opendaylight.yangtools.yang.model.api.ChoiceNode choice : choices) {
633 for (ChoiceCaseNode caze : choice.getCases()) {
634 if (findChildSchemaNode(caze, child).isPresent()) {
635 foundChoice = choice;
643 public static AugmentationIdentifier augmentationIdentifierFrom(final AugmentationSchema augmentation) {
644 ImmutableSet.Builder<QName> potentialChildren = ImmutableSet.builder();
645 for (DataSchemaNode child : augmentation.getChildNodes()) {
646 potentialChildren.add(child.getQName());
648 return new AugmentationIdentifier(null, potentialChildren.build());
651 private static DataNodeContainer augmentationProxy(final AugmentationSchema augmentation, final DataNodeContainer schema) {
652 Set<DataSchemaNode> children = new HashSet<>();
653 for (DataSchemaNode augNode : augmentation.getChildNodes()) {
654 children.add(schema.getDataChildByName(augNode.getQName()));
656 return new DataSchemaContainerProxy(children);
660 * Returns a DataNormalizationOperation for provided child node
662 * If supplied child is added by Augmentation this operation returns
663 * a DataNormalizationOperation for augmentation,
664 * otherwise returns a DataNormalizationOperation for child as
665 * call for {@link #fromDataSchemaNode(DataSchemaNode)}.
673 private static DataNormalizationOperation<?> fromAugmentation(final DataNodeContainer parent,
674 final AugmentationTarget parentAug, final DataSchemaNode child) {
675 AugmentationSchema augmentation = null;
676 for (AugmentationSchema aug : parentAug.getAvailableAugmentations()) {
677 DataSchemaNode potential = aug.getDataChildByName(child.getQName());
678 if (potential != null) {
684 if (augmentation != null) {
685 return new AugmentationNormalization(augmentation, parent);
687 return fromDataSchemaNode(child);
691 public static DataNormalizationOperation<?> fromDataSchemaNode(final DataSchemaNode potential) {
692 if (potential instanceof ContainerSchemaNode) {
693 return new ContainerNormalization((ContainerSchemaNode) potential);
694 } else if (potential instanceof ListSchemaNode) {
696 return fromListSchemaNode((ListSchemaNode) potential);
697 } else if (potential instanceof LeafSchemaNode) {
698 return new LeafNormalization(new NodeIdentifier(potential.getQName()));
699 } else if (potential instanceof org.opendaylight.yangtools.yang.model.api.ChoiceNode) {
700 return new ChoiceNodeNormalization((org.opendaylight.yangtools.yang.model.api.ChoiceNode) potential);
701 } else if (potential instanceof LeafListSchemaNode) {
702 return fromLeafListSchemaNode((LeafListSchemaNode) potential);
707 private static DataNormalizationOperation<?> fromListSchemaNode(final ListSchemaNode potential) {
708 List<QName> keyDefinition = potential.getKeyDefinition();
709 if(keyDefinition == null || keyDefinition.isEmpty()) {
710 return new UnkeyedListMixinNormalization(potential);
712 if(potential.isUserOrdered()) {
713 return new OrderedMapMixinNormalization(potential);
715 return new UnorderedMapMixinNormalization(potential);
718 private static DataNormalizationOperation<?> fromLeafListSchemaNode(final LeafListSchemaNode potential) {
719 if(potential.isUserOrdered()) {
720 return new OrderedLeafListMixinNormalization(potential);
722 return new UnorderedLeafListMixinNormalization(potential);
726 public static DataNormalizationOperation<?> from(final SchemaContext ctx) {
727 return new ContainerNormalization(ctx);
730 public abstract NormalizedNode<?, ?> createDefault(PathArgument currentArg);