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