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