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 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         super();
  60         this.identifier = identifier;
  61         if(schema instanceof DataSchemaNode) {
  62             this.dataSchemaNode = Optional.of((DataSchemaNode) schema);
  63         } else {
  64             this.dataSchemaNode = Optional.absent();
  65         }
  66     }
  67
  68     public boolean isMixin() {
  69         return false;
  70     }
  71
  72
  73     public boolean isKeyedEntry() {
  74         return false;
  75     }
  76
  77     protected Set<QName> getQNameIdentifiers() {
  78         return Collections.singleton(identifier.getNodeType());
  79     }
  80
  81     public abstract DataNormalizationOperation<?> getChild(final PathArgument child) throws DataNormalizationException;
  82
  83     public abstract DataNormalizationOperation<?> getChild(QName child) throws DataNormalizationException;
  84
  85
  86     public abstract boolean isLeaf();
  87
  88     public Optional<DataSchemaNode> getDataSchemaNode() {
  89         // FIXME
  90         return dataSchemaNode;
  91     }
  92
  93     private static abstract class SimpleTypeNormalization<T extends PathArgument> 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
 121     private static final class LeafNormalization extends SimpleTypeNormalization<NodeIdentifier> {
 122
 123         protected LeafNormalization(final LeafSchemaNode potential) {
 124             super(new NodeIdentifier(potential.getQName()),potential);
 125         }
 126
 127     }
 128
 129     private static final class LeafListEntryNormalization extends SimpleTypeNormalization<NodeWithValue> {
 130
 131         public LeafListEntryNormalization(final LeafListSchemaNode potential) {
 132             super(new NodeWithValue(potential.getQName(), null),potential);
 133         }
 134
 135         @Override
 136         public boolean isKeyedEntry() {
 137             return true;
 138         }
 139     }
 140
 141     private static abstract class CompositeNodeNormalizationOperation<T extends PathArgument> extends
 142     DataNormalizationOperation<T> {
 143
 144         protected CompositeNodeNormalizationOperation(final T identifier, final DataSchemaNode schema) {
 145             super(identifier,schema);
 146         }
 147
 148         @Override
 149         public boolean isLeaf() {
 150             return false;
 151         }
 152
 153
 154     }
 155
 156     private static abstract class DataContainerNormalizationOperation<T extends PathArgument> extends
 157     CompositeNodeNormalizationOperation<T> {
 158
 159         private final DataNodeContainer schema;
 160         private final Map<QName, DataNormalizationOperation<?>> byQName;
 161         private final Map<PathArgument, DataNormalizationOperation<?>> byArg;
 162
 163         protected DataContainerNormalizationOperation(final T identifier, final DataNodeContainer schema, 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         private DataNormalizationOperation<?> fromLocalSchema(final PathArgument child) throws DataNormalizationException {
 181             if (child instanceof AugmentationIdentifier) {
 182                 return fromSchemaAndQNameChecked(schema, ((AugmentationIdentifier) child).getPossibleChildNames()
 183                         .iterator().next());
 184             }
 185             return fromSchemaAndQNameChecked(schema, child.getNodeType());
 186         }
 187
 188         @Override
 189         public DataNormalizationOperation<?> getChild(final QName child) throws DataNormalizationException {
 190             DataNormalizationOperation<?> potential = byQName.get(child);
 191             if (potential != null) {
 192                 return potential;
 193             }
 194             potential = fromLocalSchemaAndQName(schema, child);
 195             return register(potential);
 196         }
 197
 198         protected DataNormalizationOperation<?> fromLocalSchemaAndQName(final DataNodeContainer schema2, final QName child) throws DataNormalizationException {
 199             return fromSchemaAndQNameChecked(schema2, child);
 200         }
 201
 202         private DataNormalizationOperation<?> register(final DataNormalizationOperation<?> potential) {
 203             if (potential != null) {
 204                 byArg.put(potential.getIdentifier(), potential);
 205                 for (final QName qName : potential.getQNameIdentifiers()) {
 206                     byQName.put(qName, potential);
 207                 }
 208             }
 209             return potential;
 210         }
 211
 212     }
 213
 214     private static final class ListItemNormalization extends
 215     DataContainerNormalizationOperation<NodeIdentifierWithPredicates> {
 216
 217         private final List<QName> keyDefinition;
 218
 219         protected ListItemNormalization(final NodeIdentifierWithPredicates identifier, final ListSchemaNode schema) {
 220             super(identifier, schema,schema);
 221             keyDefinition = schema.getKeyDefinition();
 222         }
 223
 224         @Override
 225         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 226             final DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> builder = Builders
 227                     .mapEntryBuilder().withNodeIdentifier((NodeIdentifierWithPredicates) currentArg);
 228             for (final Entry<QName, Object> keyValue : ((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 extends DataContainerNormalizationOperation<NodeIdentifier> {
 245
 246         protected UnkeyedListItemNormalization(final ListSchemaNode schema) {
 247             super(new NodeIdentifier(schema.getQName()), schema,schema);
 248         }
 249
 250         @Override
 251         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 252             return Builders.unkeyedListEntryBuilder().withNodeIdentifier((NodeIdentifier) currentArg).build();
 253         }
 254
 255     }
 256
 257     private static final class ContainerNormalization extends DataContainerNormalizationOperation<NodeIdentifier> {
 258
 259         protected ContainerNormalization(final ContainerSchemaNode schema) {
 260             super(new NodeIdentifier(schema.getQName()),schema, schema);
 261         }
 262
 263         @Override
 264         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 265             return Builders.containerBuilder().withNodeIdentifier((NodeIdentifier) currentArg).build();
 266         }
 267
 268     }
 269
 270     private static abstract class MixinNormalizationOp<T extends PathArgument> extends
 271     CompositeNodeNormalizationOperation<T> {
 272
 273         protected MixinNormalizationOp(final T identifier, final DataSchemaNode schema) {
 274             super(identifier,schema);
 275         }
 276
 277         @Override
 278         public final boolean isMixin() {
 279             return true;
 280         }
 281
 282     }
 283
 284
 285     private static final class OrderedLeafListMixinNormalization extends UnorderedLeafListMixinNormalization {
 286
 287
 288         public OrderedLeafListMixinNormalization(final LeafListSchemaNode potential) {
 289             super(potential);
 290         }
 291
 292         @Override
 293         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 294             return Builders.orderedLeafSetBuilder().withNodeIdentifier(getIdentifier()).build();
 295         }
 296     }
 297
 298     private static class UnorderedLeafListMixinNormalization extends MixinNormalizationOp<NodeIdentifier> {
 299
 300         private final DataNormalizationOperation<?> innerOp;
 301
 302         public UnorderedLeafListMixinNormalization(final LeafListSchemaNode potential) {
 303             super(new NodeIdentifier(potential.getQName()),potential);
 304             innerOp = new LeafListEntryNormalization(potential);
 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 extends DataContainerNormalizationOperation<AugmentationIdentifier> {
 329
 330         public AugmentationNormalization(final AugmentationSchema augmentation, final DataNodeContainer schema) {
 331             //super();
 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, final QName child)
 344                 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         public 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         public 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         public 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 = ImmutableMap.builder();
 458
 459             for (final ChoiceCaseNode caze : schema.getCases()) {
 460                 for (final DataSchemaNode cazeChild : caze.getChildNodes()) {
 461                     final DataNormalizationOperation<?> childOp = fromDataSchemaNode(cazeChild);
 462                     byArgBuilder.put(childOp.getIdentifier(), childOp);
 463                     for (final QName qname : childOp.getQNameIdentifiers()) {
 464                         byQNameBuilder.put(qname, childOp);
 465                     }
 466                 }
 467             }
 468             byQName = byQNameBuilder.build();
 469             byArg = byArgBuilder.build();
 470         }
 471
 472         @Override
 473         public DataNormalizationOperation<?> getChild(final PathArgument child) {
 474             return byArg.get(child);
 475         }
 476
 477         @Override
 478         public DataNormalizationOperation<?> getChild(final QName child) {
 479             return byQName.get(child);
 480         }
 481
 482         @Override
 483         public NormalizedNode<?, ?> createDefault(final PathArgument currentArg) {
 484             return Builders.choiceBuilder().withNodeIdentifier(getIdentifier()).build();
 485         }
 486     }
 487
 488     private static class AnyXmlNormalization extends DataNormalizationOperation<NodeIdentifier> {
 489
 490         protected AnyXmlNormalization( final AnyXmlSchemaNode schema) {
 491             super( new NodeIdentifier(schema.getQName()), schema);
 492         }
 493
 494         @Override
 495         public DataNormalizationOperation<?> getChild( final PathArgument child ) throws DataNormalizationException {
 496             return null;
 497         }
 498
 499         @Override
 500         public DataNormalizationOperation<?> getChild( final QName child ) throws DataNormalizationException {
 501             return null;
 502         }
 503
 504         @Override
 505         public boolean isLeaf() {
 506             return false;
 507         }
 508
 509         @Override
 510         public NormalizedNode<?, ?> createDefault( final PathArgument currentArg ) {
 511             return null;
 512         }
 513     }
 514
 515     private static final Optional<DataSchemaNode> findChildSchemaNode(final DataNodeContainer parent,final QName child) {
 516         DataSchemaNode potential = parent.getDataChildByName(child);
 517         if (potential == null) {
 518             final Iterable<ChoiceSchemaNode> choices = FluentIterable.from(parent.getChildNodes()).filter(ChoiceSchemaNode.class);
 519             potential = findChoice(choices, child);
 520         }
 521         return Optional.fromNullable(potential);
 522     }
 523
 524     private static DataNormalizationOperation<?> fromSchemaAndQNameChecked(final DataNodeContainer schema,
 525             final QName child) throws DataNormalizationException {
 526
 527         final Optional<DataSchemaNode> potential = findChildSchemaNode(schema, child);
 528         if (!potential.isPresent()) {
 529             throw new DataNormalizationException(String.format("Supplied QName %s is not valid according to schema %s, potential children nodes: %s", child, schema,schema.getChildNodes()));
 530         }
 531
 532         final DataSchemaNode result = potential.get();
 533         // We try to look up if this node was added by augmentation
 534         if ((schema instanceof DataSchemaNode) && result.isAugmenting()) {
 535             return fromAugmentation(schema, (AugmentationTarget) schema, result);
 536         }
 537         return fromDataSchemaNode(result);
 538     }
 539
 540     private static ChoiceSchemaNode findChoice(final Iterable<ChoiceSchemaNode> choices, final QName child) {
 541         ChoiceSchemaNode foundChoice = null;
 542         choiceLoop: for (final ChoiceSchemaNode choice : choices) {
 543             for (final ChoiceCaseNode caze : choice.getCases()) {
 544                 if (findChildSchemaNode(caze, child).isPresent()) {
 545                     foundChoice = choice;
 546                     break choiceLoop;
 547                 }
 548             }
 549         }
 550         return foundChoice;
 551     }
 552
 553     public static AugmentationIdentifier augmentationIdentifierFrom(final AugmentationSchema augmentation) {
 554         final ImmutableSet.Builder<QName> potentialChildren = ImmutableSet.builder();
 555         for (final DataSchemaNode child : augmentation.getChildNodes()) {
 556             potentialChildren.add(child.getQName());
 557         }
 558         return new AugmentationIdentifier(potentialChildren.build());
 559     }
 560
 561     private static DataNodeContainer augmentationProxy(final AugmentationSchema augmentation, final DataNodeContainer schema) {
 562         final Set<DataSchemaNode> children = new HashSet<>();
 563         for (final DataSchemaNode augNode : augmentation.getChildNodes()) {
 564             children.add(schema.getDataChildByName(augNode.getQName()));
 565         }
 566         return new EffectiveAugmentationSchema(augmentation, children);
 567     }
 568
 569     /**
 570      * Returns a DataNormalizationOperation for provided child node
 571      *
 572      * If supplied child is added by Augmentation this operation returns
 573      * a DataNormalizationOperation for augmentation,
 574      * otherwise returns a DataNormalizationOperation for child as
 575      * call for {@link #fromDataSchemaNode(DataSchemaNode)}.
 576      *
 577      *
 578      * @param parent
 579      * @param parentAug
 580      * @param child
 581      * @return
 582      */
 583     private static DataNormalizationOperation<?> fromAugmentation(final DataNodeContainer parent,
 584             final AugmentationTarget parentAug, final DataSchemaNode child) {
 585         AugmentationSchema augmentation = null;
 586         for (final AugmentationSchema aug : parentAug.getAvailableAugmentations()) {
 587             final DataSchemaNode potential = aug.getDataChildByName(child.getQName());
 588             if (potential != null) {
 589                 augmentation = aug;
 590                 break;
 591             }
 592
 593         }
 594         if (augmentation != null) {
 595             return new AugmentationNormalization(augmentation, parent);
 596         } else {
 597             return fromDataSchemaNode(child);
 598         }
 599     }
 600
 601     public static DataNormalizationOperation<?> fromDataSchemaNode(final DataSchemaNode potential) {
 602         if (potential instanceof ContainerSchemaNode) {
 603             return new ContainerNormalization((ContainerSchemaNode) potential);
 604         } else if (potential instanceof ListSchemaNode) {
 605
 606             return fromListSchemaNode((ListSchemaNode) potential);
 607         } else if (potential instanceof LeafSchemaNode) {
 608             return new LeafNormalization((LeafSchemaNode) potential);
 609         } else if (potential instanceof ChoiceSchemaNode) {
 610             return new ChoiceNodeNormalization((ChoiceSchemaNode) potential);
 611         } else if (potential instanceof LeafListSchemaNode) {
 612             return fromLeafListSchemaNode((LeafListSchemaNode) potential);
 613         } else if (potential instanceof AnyXmlSchemaNode) {
 614             return new AnyXmlNormalization( (AnyXmlSchemaNode) potential);
 615         }
 616         return null;
 617     }
 618
 619     private static DataNormalizationOperation<?> fromListSchemaNode(final ListSchemaNode potential) {
 620         final List<QName> keyDefinition = potential.getKeyDefinition();
 621         if(keyDefinition == null || keyDefinition.isEmpty()) {
 622             return new UnkeyedListMixinNormalization(potential);
 623         }
 624         if(potential.isUserOrdered()) {
 625             return new OrderedMapMixinNormalization(potential);
 626         }
 627         return new UnorderedMapMixinNormalization(potential);
 628     }
 629
 630     private static DataNormalizationOperation<?> fromLeafListSchemaNode(final LeafListSchemaNode potential) {
 631         if(potential.isUserOrdered()) {
 632             return new OrderedLeafListMixinNormalization(potential);
 633         }
 634         return new UnorderedLeafListMixinNormalization(potential);
 635     }
 636
 637
 638     public static DataNormalizationOperation<?> from(final SchemaContext ctx) {
 639         return new ContainerNormalization(ctx);
 640     }
 641
 642     public abstract NormalizedNode<?, ?> createDefault(PathArgument currentArg);
 643 }