opendaylight/md-sal/sal-common-impl/src/main/java/org/opendaylight/controller/md/sal/common/impl/util/compat/DataNormalizationOperation.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.controller.md.sal.common.impl.util.compat;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.collect.FluentIterable;
  12 import com.google.common.collect.ImmutableMap;
  13 import com.google.common.collect.ImmutableSet;
  14 import java.util.Collections;
  15 import java.util.HashSet;
  16 import java.util.List;
  17 import java.util.Map;
  18 import java.util.Map.Entry;
  19 import java.util.Set;
  20 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.YangInstanceIdentifier.AugmentationIdentifier;
  24 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  26 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeWithValue;
  27 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  28 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  29 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  30 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  31 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeAttrBuilder;
  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.ContainerSchemaNode;
  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.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.opendaylight.yangtools.yang.model.api.SchemaNode;
  45 import org.opendaylight.yangtools.yang.model.util.EffectiveAugmentationSchema;
  46
  47 @Deprecated
  48 public abstract class DataNormalizationOperation<T extends PathArgument> implements Identifiable<T> {
  49
  50     private final T identifier;
  51     private final Optional<DataSchemaNode> dataSchemaNode;
  52
  53     @Override
  54     public T getIdentifier() {
  55         return identifier;
  56     }
  57
  58     protected DataNormalizationOperation(final T identifier, final SchemaNode schema) {
  59         this.identifier = identifier;
  60         if (schema instanceof DataSchemaNode) {
  61             this.dataSchemaNode = Optional.of((DataSchemaNode) schema);
  62         } else {
  63             this.dataSchemaNode = Optional.absent();
  64         }
  65     }
  66
  67     public boolean isMixin() {
  68         return false;
  69     }
  70
  71
  72     public boolean isKeyedEntry() {
  73         return false;
  74     }
  75
  76     protected Set<QName> getQNameIdentifiers() {
  77         return Collections.singleton(identifier.getNodeType());
  78     }
  79
  80     public abstract DataNormalizationOperation<?> getChild(PathArgument child) throws DataNormalizationException;
  81
  82     public abstract DataNormalizationOperation<?> getChild(QName child) throws DataNormalizationException;
  83
  84
  85     public abstract boolean isLeaf();
  86
  87     public Optional<DataSchemaNode> getDataSchemaNode() {
  88         // FIXME
  89         return dataSchemaNode;
  90     }
  91
  92     private abstract static class SimpleTypeNormalization<T extends PathArgument>
  93             extends DataNormalizationOperation<T> {
  94
  95         protected SimpleTypeNormalization(final T identifier, final DataSchemaNode potential) {
  96             super(identifier,potential);
  97         }
  98
  99         @Override
 100         public DataNormalizationOperation<?> getChild(final PathArgument child) {
 101             return null;
 102         }
 103
 104         @Override
 105         public DataNormalizationOperation<?> getChild(final QName child) {
 106             return null;
 107         }
 108
 109         @Override
 110         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 111             return null;
 112         }
 113
 114         @Override
 115         public boolean isLeaf() {
 116             return true;
 117         }
 118     }
 119
 120     private static final class LeafNormalization extends SimpleTypeNormalization<NodeIdentifier> {
 121
 122         protected LeafNormalization(final LeafSchemaNode potential) {
 123             super(new NodeIdentifier(potential.getQName()),potential);
 124         }
 125
 126     }
 127
 128     private static final class LeafListEntryNormalization extends SimpleTypeNormalization<NodeWithValue> {
 129
 130         LeafListEntryNormalization(final LeafListSchemaNode potential) {
 131             super(new NodeWithValue(potential.getQName(), null),potential);
 132         }
 133
 134         @Override
 135         public boolean isKeyedEntry() {
 136             return true;
 137         }
 138     }
 139
 140     private abstract static class CompositeNodeNormalizationOperation<T extends PathArgument>
 141             extends DataNormalizationOperation<T> {
 142
 143         protected CompositeNodeNormalizationOperation(final T identifier, final DataSchemaNode schema) {
 144             super(identifier,schema);
 145         }
 146
 147         @Override
 148         public boolean isLeaf() {
 149             return false;
 150         }
 151
 152
 153     }
 154
 155     private abstract static class DataContainerNormalizationOperation<T extends PathArgument>
 156             extends CompositeNodeNormalizationOperation<T> {
 157
 158         private final DataNodeContainer schema;
 159         private final Map<QName, DataNormalizationOperation<?>> byQName;
 160         private final Map<PathArgument, DataNormalizationOperation<?>> byArg;
 161
 162         protected DataContainerNormalizationOperation(final T identifier, final DataNodeContainer schema,
 163                 final DataSchemaNode node) {
 164             super(identifier,node);
 165             this.schema = schema;
 166             this.byArg = new ConcurrentHashMap<>();
 167             this.byQName = new ConcurrentHashMap<>();
 168         }
 169
 170         @Override
 171         public DataNormalizationOperation<?> getChild(final PathArgument child) throws DataNormalizationException {
 172             DataNormalizationOperation<?> potential = byArg.get(child);
 173             if (potential != null) {
 174                 return potential;
 175             }
 176             potential = fromLocalSchema(child);
 177             return register(potential);
 178         }
 179
 180         @Override
 181         public DataNormalizationOperation<?> getChild(final QName child) throws DataNormalizationException {
 182             DataNormalizationOperation<?> potential = byQName.get(child);
 183             if (potential != null) {
 184                 return potential;
 185             }
 186             potential = fromLocalSchemaAndQName(schema, child);
 187             return register(potential);
 188         }
 189
 190         private DataNormalizationOperation<?> fromLocalSchema(final PathArgument child)
 191                 throws DataNormalizationException {
 192             if (child instanceof AugmentationIdentifier) {
 193                 return fromSchemaAndQNameChecked(schema, ((AugmentationIdentifier) child).getPossibleChildNames()
 194                         .iterator().next());
 195             }
 196             return fromSchemaAndQNameChecked(schema, child.getNodeType());
 197         }
 198
 199         protected DataNormalizationOperation<?> fromLocalSchemaAndQName(final DataNodeContainer schema2,
 200                 final QName child) throws DataNormalizationException {
 201             return fromSchemaAndQNameChecked(schema2, child);
 202         }
 203
 204         private DataNormalizationOperation<?> register(final DataNormalizationOperation<?> potential) {
 205             if (potential != null) {
 206                 byArg.put(potential.getIdentifier(), potential);
 207                 for (final QName qname : potential.getQNameIdentifiers()) {
 208                     byQName.put(qname, potential);
 209                 }
 210             }
 211             return potential;
 212         }
 213
 214     }
 215
 216     private static final class ListItemNormalization extends
 217             DataContainerNormalizationOperation<NodeIdentifierWithPredicates> {
 218
 219         protected ListItemNormalization(final NodeIdentifierWithPredicates identifier, final ListSchemaNode schema) {
 220             super(identifier, schema, schema);
 221         }
 222
 223         @Override
 224         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 225             final DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> builder = Builders
 226                     .mapEntryBuilder().withNodeIdentifier((NodeIdentifierWithPredicates) currentArg);
 227             for (final Entry<QName, Object> keyValue :
 228                     ((NodeIdentifierWithPredicates) currentArg).getKeyValues().entrySet()) {
 229                 builder.addChild(Builders.leafBuilder()
 230                         //
 231                         .withNodeIdentifier(new NodeIdentifier(keyValue.getKey())).withValue(keyValue.getValue())
 232                         .build());
 233             }
 234             return builder.build();
 235         }
 236
 237
 238         @Override
 239         public boolean isKeyedEntry() {
 240             return true;
 241         }
 242     }
 243
 244     private static final class UnkeyedListItemNormalization
 245             extends DataContainerNormalizationOperation<NodeIdentifier> {
 246
 247         protected UnkeyedListItemNormalization(final ListSchemaNode schema) {
 248             super(new NodeIdentifier(schema.getQName()), schema,schema);
 249         }
 250
 251         @Override
 252         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 253             return Builders.unkeyedListEntryBuilder().withNodeIdentifier((NodeIdentifier) currentArg).build();
 254         }
 255
 256     }
 257
 258     private static final class ContainerNormalization extends DataContainerNormalizationOperation<NodeIdentifier> {
 259
 260         protected ContainerNormalization(final ContainerSchemaNode schema) {
 261             super(new NodeIdentifier(schema.getQName()),schema, schema);
 262         }
 263
 264         @Override
 265         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 266             return Builders.containerBuilder().withNodeIdentifier((NodeIdentifier) currentArg).build();
 267         }
 268
 269     }
 270
 271     private abstract static class MixinNormalizationOp<T extends PathArgument>
 272             extends CompositeNodeNormalizationOperation<T> {
 273
 274         protected MixinNormalizationOp(final T identifier, final DataSchemaNode schema) {
 275             super(identifier,schema);
 276         }
 277
 278         @Override
 279         public final boolean isMixin() {
 280             return true;
 281         }
 282
 283     }
 284
 285
 286     private static final class OrderedLeafListMixinNormalization extends UnorderedLeafListMixinNormalization {
 287         OrderedLeafListMixinNormalization(final LeafListSchemaNode potential) {
 288             super(potential);
 289         }
 290
 291         @Override
 292         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 293             return Builders.orderedLeafSetBuilder().withNodeIdentifier(getIdentifier()).build();
 294         }
 295     }
 296
 297     private static class UnorderedLeafListMixinNormalization extends MixinNormalizationOp<NodeIdentifier> {
 298
 299         private final DataNormalizationOperation<?> innerOp;
 300
 301         UnorderedLeafListMixinNormalization(final LeafListSchemaNode potential) {
 302             super(new NodeIdentifier(potential.getQName()),potential);
 303             innerOp = new LeafListEntryNormalization(potential);
 304         }
 305
 306         @Override
 307         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 308             return Builders.leafSetBuilder().withNodeIdentifier(getIdentifier()).build();
 309         }
 310
 311         @Override
 312         public DataNormalizationOperation<?> getChild(final PathArgument child) {
 313             if (child instanceof NodeWithValue) {
 314                 return innerOp;
 315             }
 316             return null;
 317         }
 318
 319         @Override
 320         public DataNormalizationOperation<?> getChild(final QName child) {
 321             if (getIdentifier().getNodeType().equals(child)) {
 322                 return innerOp;
 323             }
 324             return null;
 325         }
 326     }
 327
 328     private static final class AugmentationNormalization
 329             extends DataContainerNormalizationOperation<AugmentationIdentifier> {
 330
 331         AugmentationNormalization(final AugmentationSchemaNode augmentation, final DataNodeContainer schema) {
 332             super(augmentationIdentifierFrom(augmentation), augmentationProxy(augmentation,schema),null);
 333         }
 334
 335         @Override
 336         public boolean isMixin() {
 337             return true;
 338         }
 339
 340
 341
 342         @Override
 343         protected DataNormalizationOperation<?> fromLocalSchemaAndQName(final DataNodeContainer schema,
 344                 final QName child) throws DataNormalizationException {
 345             final Optional<DataSchemaNode> potential = findChildSchemaNode(schema, child);
 346             if (!potential.isPresent()) {
 347                 return null;
 348             }
 349
 350             final DataSchemaNode result = potential.get();
 351             // We try to look up if this node was added by augmentation
 352             if (schema instanceof DataSchemaNode && result.isAugmenting()) {
 353                 return fromAugmentation(schema, (AugmentationTarget) schema, result);
 354             }
 355             return fromDataSchemaNode(result);
 356         }
 357
 358         @Override
 359         protected Set<QName> getQNameIdentifiers() {
 360             return getIdentifier().getPossibleChildNames();
 361         }
 362
 363         @Override
 364         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 365             return Builders.augmentationBuilder().withNodeIdentifier(getIdentifier()).build();
 366         }
 367
 368     }
 369
 370     private static class UnorderedMapMixinNormalization extends MixinNormalizationOp<NodeIdentifier> {
 371
 372         private final ListItemNormalization innerNode;
 373
 374         UnorderedMapMixinNormalization(final ListSchemaNode list) {
 375             super(new NodeIdentifier(list.getQName()),list);
 376             this.innerNode = new ListItemNormalization(new NodeIdentifierWithPredicates(list.getQName(),
 377                     Collections.<QName, Object>emptyMap()), list);
 378         }
 379
 380         @Override
 381         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 382             return Builders.mapBuilder().withNodeIdentifier(getIdentifier()).build();
 383         }
 384
 385         @Override
 386         public DataNormalizationOperation<?> getChild(final PathArgument child) {
 387             if (child.getNodeType().equals(getIdentifier().getNodeType())) {
 388                 return innerNode;
 389             }
 390             return null;
 391         }
 392
 393         @Override
 394         public DataNormalizationOperation<?> getChild(final QName child) {
 395             if (getIdentifier().getNodeType().equals(child)) {
 396                 return innerNode;
 397             }
 398             return null;
 399         }
 400
 401     }
 402
 403
 404     private static class UnkeyedListMixinNormalization extends MixinNormalizationOp<NodeIdentifier> {
 405
 406         private final UnkeyedListItemNormalization innerNode;
 407
 408         UnkeyedListMixinNormalization(final ListSchemaNode list) {
 409             super(new NodeIdentifier(list.getQName()),list);
 410             this.innerNode = new UnkeyedListItemNormalization(list);
 411         }
 412
 413         @Override
 414         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 415             return Builders.unkeyedListBuilder().withNodeIdentifier(getIdentifier()).build();
 416         }
 417
 418         @Override
 419         public DataNormalizationOperation<?> getChild(final PathArgument child) {
 420             if (child.getNodeType().equals(getIdentifier().getNodeType())) {
 421                 return innerNode;
 422             }
 423             return null;
 424         }
 425
 426         @Override
 427         public DataNormalizationOperation<?> getChild(final QName child) {
 428             if (getIdentifier().getNodeType().equals(child)) {
 429                 return innerNode;
 430             }
 431             return null;
 432         }
 433
 434     }
 435
 436     private static final class OrderedMapMixinNormalization extends UnorderedMapMixinNormalization {
 437
 438         OrderedMapMixinNormalization(final ListSchemaNode list) {
 439             super(list);
 440         }
 441
 442         @Override
 443         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 444             return Builders.orderedMapBuilder().withNodeIdentifier(getIdentifier()).build();
 445         }
 446
 447     }
 448
 449     private static class ChoiceNodeNormalization extends MixinNormalizationOp<NodeIdentifier> {
 450
 451         private final ImmutableMap<QName, DataNormalizationOperation<?>> byQName;
 452         private final ImmutableMap<PathArgument, DataNormalizationOperation<?>> byArg;
 453
 454         protected ChoiceNodeNormalization(final ChoiceSchemaNode schema) {
 455             super(new NodeIdentifier(schema.getQName()),schema);
 456             final ImmutableMap.Builder<QName, DataNormalizationOperation<?>> byQNameBuilder = ImmutableMap.builder();
 457             final ImmutableMap.Builder<PathArgument, DataNormalizationOperation<?>> byArgBuilder =
 458                     ImmutableMap.builder();
 459
 460             for (final CaseSchemaNode caze : schema.getCases().values()) {
 461                 for (final DataSchemaNode cazeChild : caze.getChildNodes()) {
 462                     final DataNormalizationOperation<?> childOp = fromDataSchemaNode(cazeChild);
 463                     byArgBuilder.put(childOp.getIdentifier(), childOp);
 464                     for (final QName qname : childOp.getQNameIdentifiers()) {
 465                         byQNameBuilder.put(qname, childOp);
 466                     }
 467                 }
 468             }
 469             byQName = byQNameBuilder.build();
 470             byArg = byArgBuilder.build();
 471         }
 472
 473         @Override
 474         public DataNormalizationOperation<?> getChild(final PathArgument child) {
 475             return byArg.get(child);
 476         }
 477
 478         @Override
 479         public DataNormalizationOperation<?> getChild(final QName child) {
 480             return byQName.get(child);
 481         }
 482
 483         @Override
 484         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 485             return Builders.choiceBuilder().withNodeIdentifier(getIdentifier()).build();
 486         }
 487     }
 488
 489     private static class AnyXmlNormalization extends DataNormalizationOperation<NodeIdentifier> {
 490
 491         protected AnyXmlNormalization(final AnyXmlSchemaNode schema) {
 492             super(new NodeIdentifier(schema.getQName()), schema);
 493         }
 494
 495         @Override
 496         public DataNormalizationOperation<?> getChild(final PathArgument child) throws DataNormalizationException {
 497             return null;
 498         }
 499
 500         @Override
 501         public DataNormalizationOperation<?> getChild(final QName child) throws DataNormalizationException {
 502             return null;
 503         }
 504
 505         @Override
 506         public boolean isLeaf() {
 507             return false;
 508         }
 509
 510         @Override
 511         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 512             return null;
 513         }
 514     }
 515
 516     private static Optional<DataSchemaNode> findChildSchemaNode(final DataNodeContainer parent,
 517             final QName child) {
 518         DataSchemaNode potential = parent.getDataChildByName(child);
 519         if (potential == null) {
 520             final Iterable<ChoiceSchemaNode> choices = FluentIterable.from(parent.getChildNodes())
 521                     .filter(ChoiceSchemaNode.class);
 522             potential = findChoice(choices, child);
 523         }
 524         return Optional.fromNullable(potential);
 525     }
 526
 527     private static DataNormalizationOperation<?> fromSchemaAndQNameChecked(final DataNodeContainer schema,
 528             final QName child) throws DataNormalizationException {
 529
 530         final Optional<DataSchemaNode> potential = findChildSchemaNode(schema, child);
 531         if (!potential.isPresent()) {
 532             throw new DataNormalizationException(String.format(
 533                     "Supplied QName %s is not valid according to schema %s, potential children nodes: %s", child,
 534                     schema,schema.getChildNodes()));
 535         }
 536
 537         final DataSchemaNode result = potential.get();
 538         // We try to look up if this node was added by augmentation
 539         if (schema instanceof DataSchemaNode && result.isAugmenting()) {
 540             return fromAugmentation(schema, (AugmentationTarget) schema, result);
 541         }
 542         return fromDataSchemaNode(result);
 543     }
 544
 545     private static ChoiceSchemaNode findChoice(final Iterable<ChoiceSchemaNode> choices, final QName child) {
 546         ChoiceSchemaNode foundChoice = null;
 547         choiceLoop: for (final ChoiceSchemaNode choice : choices) {
 548             for (final CaseSchemaNode caze : choice.getCases().values()) {
 549                 if (findChildSchemaNode(caze, child).isPresent()) {
 550                     foundChoice = choice;
 551                     break choiceLoop;
 552                 }
 553             }
 554         }
 555         return foundChoice;
 556     }
 557
 558     public static AugmentationIdentifier augmentationIdentifierFrom(final AugmentationSchemaNode augmentation) {
 559         final ImmutableSet.Builder<QName> potentialChildren = ImmutableSet.builder();
 560         for (final DataSchemaNode child : augmentation.getChildNodes()) {
 561             potentialChildren.add(child.getQName());
 562         }
 563         return new AugmentationIdentifier(potentialChildren.build());
 564     }
 565
 566     private static DataNodeContainer augmentationProxy(final AugmentationSchemaNode augmentation,
 567             final DataNodeContainer schema) {
 568         final Set<DataSchemaNode> children = new HashSet<>();
 569         for (final DataSchemaNode augNode : augmentation.getChildNodes()) {
 570             children.add(schema.getDataChildByName(augNode.getQName()));
 571         }
 572         return new EffectiveAugmentationSchema(augmentation, children);
 573     }
 574
 575     /**
 576      * Returns a DataNormalizationOperation for provided child node.
 577      *
 578      * <p>
 579      * If supplied child is added by Augmentation this operation returns
 580      * a DataNormalizationOperation for augmentation,
 581      * otherwise returns a DataNormalizationOperation for child as
 582      * call for {@link #fromDataSchemaNode(DataSchemaNode)}.
 583      */
 584     private static DataNormalizationOperation<?> fromAugmentation(final DataNodeContainer parent,
 585             final AugmentationTarget parentAug, final DataSchemaNode child) {
 586         AugmentationSchemaNode augmentation = null;
 587         for (final AugmentationSchemaNode aug : parentAug.getAvailableAugmentations()) {
 588             final DataSchemaNode potential = aug.getDataChildByName(child.getQName());
 589             if (potential != null) {
 590                 augmentation = aug;
 591                 break;
 592             }
 593
 594         }
 595         if (augmentation != null) {
 596             return new AugmentationNormalization(augmentation, parent);
 597         } else {
 598             return fromDataSchemaNode(child);
 599         }
 600     }
 601
 602     public static DataNormalizationOperation<?> fromDataSchemaNode(final DataSchemaNode potential) {
 603         if (potential instanceof ContainerSchemaNode) {
 604             return new ContainerNormalization((ContainerSchemaNode) potential);
 605         } else if (potential instanceof ListSchemaNode) {
 606
 607             return fromListSchemaNode((ListSchemaNode) potential);
 608         } else if (potential instanceof LeafSchemaNode) {
 609             return new LeafNormalization((LeafSchemaNode) potential);
 610         } else if (potential instanceof ChoiceSchemaNode) {
 611             return new ChoiceNodeNormalization((ChoiceSchemaNode) potential);
 612         } else if (potential instanceof LeafListSchemaNode) {
 613             return fromLeafListSchemaNode((LeafListSchemaNode) potential);
 614         } else if (potential instanceof AnyXmlSchemaNode) {
 615             return new AnyXmlNormalization((AnyXmlSchemaNode) potential);
 616         }
 617         return null;
 618     }
 619
 620     private static DataNormalizationOperation<?> fromListSchemaNode(final ListSchemaNode potential) {
 621         final List<QName> keyDefinition = potential.getKeyDefinition();
 622         if (keyDefinition == null || keyDefinition.isEmpty()) {
 623             return new UnkeyedListMixinNormalization(potential);
 624         }
 625         if (potential.isUserOrdered()) {
 626             return new OrderedMapMixinNormalization(potential);
 627         }
 628         return new UnorderedMapMixinNormalization(potential);
 629     }
 630
 631     private static DataNormalizationOperation<?> fromLeafListSchemaNode(final LeafListSchemaNode potential) {
 632         if (potential.isUserOrdered()) {
 633             return new OrderedLeafListMixinNormalization(potential);
 634         }
 635         return new UnorderedLeafListMixinNormalization(potential);
 636     }
 637
 638
 639     public static DataNormalizationOperation<?> from(final SchemaContext ctx) {
 640         return new ContainerNormalization(ctx);
 641     }
 642
 643     public abstract NormalizedNode<?, ?> createDefault(PathArgument currentArg);
 644 }