restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/rests/services/impl/RestconfDataServiceImpl.java

   1 /*
   2  * Copyright (c) 2016 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.restconf.nb.rfc8040.rests.services.impl;
   9
  10 import static java.util.Objects.requireNonNull;
  11 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.INSERT;
  12 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.POINT;
  13 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.NOTIFICATION_STREAM;
  14 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAMS_PATH;
  15 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_ACCESS_PATH_PART;
  16 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_LOCATION_PATH_PART;
  17 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH;
  18 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH_PART;
  19
  20 import com.google.common.annotations.VisibleForTesting;
  21 import com.google.common.collect.ImmutableList;
  22 import java.net.URI;
  23 import java.time.Clock;
  24 import java.time.LocalDateTime;
  25 import java.time.format.DateTimeFormatter;
  26 import java.util.HashMap;
  27 import java.util.List;
  28 import java.util.Map;
  29 import java.util.Map.Entry;
  30 import java.util.Optional;
  31 import java.util.concurrent.ExecutionException;
  32 import javax.ws.rs.Path;
  33 import javax.ws.rs.core.Response;
  34 import javax.ws.rs.core.Response.Status;
  35 import javax.ws.rs.core.UriInfo;
  36 import org.eclipse.jdt.annotation.Nullable;
  37 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  38 import org.opendaylight.mdsal.dom.api.DOMActionResult;
  39 import org.opendaylight.mdsal.dom.api.DOMActionService;
  40 import org.opendaylight.mdsal.dom.api.DOMDataBroker;
  41 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteOperations;
  42 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteTransaction;
  43 import org.opendaylight.mdsal.dom.api.DOMMountPoint;
  44 import org.opendaylight.mdsal.dom.api.DOMMountPointService;
  45 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  46 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  47 import org.opendaylight.restconf.common.context.NormalizedNodeContext;
  48 import org.opendaylight.restconf.common.context.WriterParameters;
  49 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  50 import org.opendaylight.restconf.common.patch.PatchContext;
  51 import org.opendaylight.restconf.common.patch.PatchStatusContext;
  52 import org.opendaylight.restconf.nb.rfc8040.Rfc8040;
  53 import org.opendaylight.restconf.nb.rfc8040.handlers.SchemaContextHandler;
  54 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfDataService;
  55 import org.opendaylight.restconf.nb.rfc8040.rests.services.api.RestconfStreamsSubscriptionService;
  56 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.MdsalRestconfStrategy;
  57 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.RestconfStrategy;
  58 import org.opendaylight.restconf.nb.rfc8040.rests.utils.DeleteDataTransactionUtil;
  59 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PatchDataTransactionUtil;
  60 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PlainPatchDataTransactionUtil;
  61 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PostDataTransactionUtil;
  62 import org.opendaylight.restconf.nb.rfc8040.rests.utils.PutDataTransactionUtil;
  63 import org.opendaylight.restconf.nb.rfc8040.rests.utils.ReadDataTransactionUtil;
  64 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant;
  65 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfDataServiceConstant.PostPutQueryParameters.Insert;
  66 import org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfInvokeOperationsUtil;
  67 import org.opendaylight.restconf.nb.rfc8040.streams.Configuration;
  68 import org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationListenerAdapter;
  69 import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
  70 import org.opendaylight.restconf.nb.rfc8040.utils.parser.ParserIdentifier;
  71 import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
  72 import org.opendaylight.yangtools.concepts.Immutable;
  73 import org.opendaylight.yangtools.yang.common.ErrorTag;
  74 import org.opendaylight.yangtools.yang.common.ErrorType;
  75 import org.opendaylight.yangtools.yang.common.QName;
  76 import org.opendaylight.yangtools.yang.common.Revision;
  77 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  78 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  79 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  80 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  81 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  82 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  83 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
  84 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
  85 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
  86 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  87 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
  88 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Absolute;
  89 import org.slf4j.Logger;
  90 import org.slf4j.LoggerFactory;
  91
  92 /**
  93  * Implementation of {@link RestconfDataService}.
  94  */
  95 @Path("/")
  96 public class RestconfDataServiceImpl implements RestconfDataService {
  97     // FIXME: we should be able to interpret 'point' and refactor this class into a behavior
  98     private static final class QueryParams implements Immutable {
  99         final @Nullable String point;
 100         final @Nullable Insert insert;
 101
 102         QueryParams(final @Nullable Insert insert, final @Nullable String point) {
 103             this.insert = insert;
 104             this.point = point;
 105         }
 106     }
 107
 108     private static final Logger LOG = LoggerFactory.getLogger(RestconfDataServiceImpl.class);
 109     private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MMM-dd HH:mm:ss");
 110
 111     private final RestconfStreamsSubscriptionService delegRestconfSubscrService;
 112     private final SchemaContextHandler schemaContextHandler;
 113     private final MdsalRestconfStrategy restconfStrategy;
 114     private final DOMMountPointService mountPointService;
 115     private final SubscribeToStreamUtil streamUtils;
 116     private final DOMActionService actionService;
 117     private final DOMDataBroker dataBroker;
 118
 119     public RestconfDataServiceImpl(final SchemaContextHandler schemaContextHandler,
 120             final DOMDataBroker dataBroker, final DOMMountPointService  mountPointService,
 121             final RestconfStreamsSubscriptionService delegRestconfSubscrService,
 122             final DOMActionService actionService, final Configuration configuration) {
 123         this.schemaContextHandler = requireNonNull(schemaContextHandler);
 124         this.dataBroker = requireNonNull(dataBroker);
 125         this.restconfStrategy = new MdsalRestconfStrategy(dataBroker);
 126         this.mountPointService = requireNonNull(mountPointService);
 127         this.delegRestconfSubscrService = requireNonNull(delegRestconfSubscrService);
 128         this.actionService = requireNonNull(actionService);
 129         streamUtils = configuration.isUseSSE() ? SubscribeToStreamUtil.serverSentEvents()
 130                 : SubscribeToStreamUtil.webSockets();
 131     }
 132
 133     @Override
 134     public Response readData(final UriInfo uriInfo) {
 135         return readData(null, uriInfo);
 136     }
 137
 138     @Override
 139     public Response readData(final String identifier, final UriInfo uriInfo) {
 140         final EffectiveModelContext schemaContextRef = this.schemaContextHandler.get();
 141         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 142                 identifier, schemaContextRef, Optional.of(mountPointService));
 143         final WriterParameters parameters = ReadDataTransactionUtil.parseUriParameters(instanceIdentifier, uriInfo);
 144
 145         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 146
 147         // FIXME: this looks quite crazy, why do we even have it?
 148         if (mountPoint == null && identifier != null && identifier.contains(STREAMS_PATH)
 149             && !identifier.contains(STREAM_PATH_PART)) {
 150             createAllYangNotificationStreams(schemaContextRef, uriInfo);
 151         }
 152
 153         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 154         final NormalizedNode node;
 155         if (parameters.getFieldPaths() != null && !parameters.getFieldPaths().isEmpty()) {
 156             node = ReadDataTransactionUtil.readData(parameters.getContent(), instanceIdentifier.getInstanceIdentifier(),
 157                     strategy, parameters.getWithDefault(), schemaContextRef, parameters.getFieldPaths());
 158         } else {
 159             node = ReadDataTransactionUtil.readData(parameters.getContent(), instanceIdentifier.getInstanceIdentifier(),
 160                     strategy, parameters.getWithDefault(), schemaContextRef);
 161         }
 162
 163         // FIXME: this is utter craziness, refactor it properly!
 164         if (identifier != null && identifier.contains(STREAM_PATH) && identifier.contains(STREAM_ACCESS_PATH_PART)
 165                 && identifier.contains(STREAM_LOCATION_PATH_PART)) {
 166             final String value = (String) node.body();
 167             final String streamName = value.substring(value.indexOf(NOTIFICATION_STREAM + '/'));
 168             this.delegRestconfSubscrService.subscribeToStream(streamName, uriInfo);
 169         }
 170         if (node == null) {
 171             throw new RestconfDocumentedException(
 172                     "Request could not be completed because the relevant data model content does not exist",
 173                     ErrorType.PROTOCOL, ErrorTag.DATA_MISSING);
 174         }
 175
 176         if (parameters.getContent().equals(RestconfDataServiceConstant.ReadData.ALL)
 177                     || parameters.getContent().equals(RestconfDataServiceConstant.ReadData.CONFIG)) {
 178             final QName type = node.getIdentifier().getNodeType();
 179             return Response.status(Status.OK)
 180                     .entity(new NormalizedNodeContext(instanceIdentifier, node, parameters))
 181                     .header("ETag", '"' + type.getModule().getRevision().map(Revision::toString).orElse(null)
 182                         + "-" + type.getLocalName() + '"')
 183                     .header("Last-Modified", FORMATTER.format(LocalDateTime.now(Clock.systemUTC())))
 184                     .build();
 185         }
 186
 187         return Response.status(Status.OK)
 188             .entity(new NormalizedNodeContext(instanceIdentifier, node, parameters))
 189             .build();
 190     }
 191
 192     private void createAllYangNotificationStreams(final EffectiveModelContext schemaContext, final UriInfo uriInfo) {
 193         final DOMDataTreeWriteTransaction transaction = dataBroker.newWriteOnlyTransaction();
 194         for (final NotificationDefinition notificationDefinition : schemaContext.getNotifications()) {
 195             writeNotificationStreamToDatastore(schemaContext, uriInfo, transaction,
 196                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 197                     NotificationOutputType.XML));
 198             writeNotificationStreamToDatastore(schemaContext, uriInfo, transaction,
 199                 CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContext,
 200                     NotificationOutputType.JSON));
 201         }
 202         try {
 203             transaction.commit().get();
 204         } catch (final InterruptedException | ExecutionException e) {
 205             throw new RestconfDocumentedException("Problem while putting data to DS.", e);
 206         }
 207     }
 208
 209     private void writeNotificationStreamToDatastore(final EffectiveModelContext schemaContext,
 210             final UriInfo uriInfo, final DOMDataTreeWriteOperations tx, final NotificationListenerAdapter listener) {
 211         final URI uri = streamUtils.prepareUriByStreamName(uriInfo, listener.getStreamName());
 212         final MapEntryNode mapToStreams = RestconfMappingNodeUtil.mapYangNotificationStreamByIetfRestconfMonitoring(
 213                 listener.getSchemaPath().lastNodeIdentifier(), schemaContext.getNotifications(), null,
 214                 listener.getOutputType(), uri);
 215
 216         tx.merge(LogicalDatastoreType.OPERATIONAL,
 217             Rfc8040.restconfStateStreamPath(mapToStreams.getIdentifier()), mapToStreams);
 218     }
 219
 220     @Override
 221     public Response putData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 222         requireNonNull(payload);
 223
 224         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 225
 226         final InstanceIdentifierContext<? extends SchemaNode> iid = payload.getInstanceIdentifierContext();
 227
 228         validInputData(iid.getSchemaNode(), payload);
 229         validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 230         validateListKeysEqualityInPayloadAndUri(payload);
 231
 232         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 233         final EffectiveModelContext ref = mountPoint == null
 234                 ? this.schemaContextHandler.get() : modelContext(mountPoint);
 235
 236         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 237         return PutDataTransactionUtil.putData(payload, ref, strategy, checkedParms.insert, checkedParms.point);
 238     }
 239
 240     private static QueryParams checkQueryParameters(final UriInfo uriInfo) {
 241         boolean insertUsed = false;
 242         boolean pointUsed = false;
 243         Insert insert = null;
 244         String point = null;
 245
 246         for (final Entry<String, List<String>> entry : uriInfo.getQueryParameters().entrySet()) {
 247             switch (entry.getKey()) {
 248                 case INSERT:
 249                     if (insertUsed) {
 250                         throw new RestconfDocumentedException("Insert parameter can be used only once.",
 251                             ErrorType.PROTOCOL, ErrorTag.BAD_ELEMENT);
 252                     }
 253
 254                     insertUsed = true;
 255                     final String str = entry.getValue().get(0);
 256                     insert = Insert.forValue(str);
 257                     if (insert == null) {
 258                         throw new RestconfDocumentedException("Unrecognized insert parameter value '" + str + "'",
 259                             ErrorType.PROTOCOL, ErrorTag.BAD_ELEMENT);
 260                     }
 261                     break;
 262                 case POINT:
 263                     if (pointUsed) {
 264                         throw new RestconfDocumentedException("Point parameter can be used only once.",
 265                             ErrorType.PROTOCOL, ErrorTag.BAD_ELEMENT);
 266                     }
 267
 268                     pointUsed = true;
 269                     point = entry.getValue().get(0);
 270                     break;
 271                 default:
 272                     throw new RestconfDocumentedException("Bad parameter for post: " + entry.getKey(),
 273                             ErrorType.PROTOCOL, ErrorTag.BAD_ELEMENT);
 274             }
 275         }
 276
 277         checkQueryParams(insertUsed, pointUsed, insert);
 278         return new QueryParams(insert, point);
 279     }
 280
 281     private static void checkQueryParams(final boolean insertUsed, final boolean pointUsed, final Insert insert) {
 282         if (pointUsed) {
 283             if (!insertUsed) {
 284                 throw new RestconfDocumentedException("Point parameter can't be used without Insert parameter.",
 285                     ErrorType.PROTOCOL, ErrorTag.BAD_ELEMENT);
 286             }
 287
 288             if (insert != Insert.BEFORE && insert != Insert.AFTER) {
 289                 throw new RestconfDocumentedException(
 290                     "Point parameter can be used only with 'after' or 'before' values of Insert parameter.",
 291                     ErrorType.PROTOCOL, ErrorTag.BAD_ELEMENT);
 292             }
 293         }
 294     }
 295
 296     @Override
 297     public Response postData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 298         return postData(payload, uriInfo);
 299     }
 300
 301     @Override
 302     public Response postData(final NormalizedNodeContext payload, final UriInfo uriInfo) {
 303         requireNonNull(payload);
 304         if (payload.getInstanceIdentifierContext().getSchemaNode() instanceof ActionDefinition) {
 305             return invokeAction(payload);
 306         }
 307
 308         final QueryParams checkedParms = checkQueryParameters(uriInfo);
 309         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 310         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 311         return PostDataTransactionUtil.postData(uriInfo, payload, strategy,
 312                 getSchemaContext(mountPoint), checkedParms.insert, checkedParms.point);
 313     }
 314
 315     @Override
 316     public Response deleteData(final String identifier) {
 317         final InstanceIdentifierContext<?> instanceIdentifier = ParserIdentifier.toInstanceIdentifier(
 318                 identifier, this.schemaContextHandler.get(), Optional.of(mountPointService));
 319
 320         final DOMMountPoint mountPoint = instanceIdentifier.getMountPoint();
 321         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 322         return DeleteDataTransactionUtil.deleteData(strategy, instanceIdentifier.getInstanceIdentifier());
 323     }
 324
 325     @Override
 326     public PatchStatusContext patchData(final String identifier, final PatchContext context, final UriInfo uriInfo) {
 327         return patchData(context, uriInfo);
 328     }
 329
 330     @Override
 331     public PatchStatusContext patchData(final PatchContext context, final UriInfo uriInfo) {
 332         final DOMMountPoint mountPoint = RestconfDocumentedException.throwIfNull(context,
 333             ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE, "No patch documented provided")
 334             .getInstanceIdentifierContext().getMountPoint();
 335         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 336         return PatchDataTransactionUtil.patchData(context, strategy, getSchemaContext(mountPoint));
 337     }
 338
 339     @Override
 340     public Response patchData(final String identifier, final NormalizedNodeContext payload, final UriInfo uriInfo) {
 341         requireNonNull(payload);
 342
 343         final InstanceIdentifierContext<? extends SchemaNode> iid = payload.getInstanceIdentifierContext();
 344         validInputData(iid.getSchemaNode(), payload);
 345         validTopLevelNodeName(iid.getInstanceIdentifier(), payload);
 346         validateListKeysEqualityInPayloadAndUri(payload);
 347
 348         final DOMMountPoint mountPoint = payload.getInstanceIdentifierContext().getMountPoint();
 349         final EffectiveModelContext ref = mountPoint == null
 350                 ? this.schemaContextHandler.get() : modelContext(mountPoint);
 351         final RestconfStrategy strategy = getRestconfStrategy(mountPoint);
 352
 353         return PlainPatchDataTransactionUtil.patchData(payload, strategy, ref);
 354     }
 355
 356     private EffectiveModelContext getSchemaContext(final DOMMountPoint mountPoint) {
 357         return mountPoint == null ? schemaContextHandler.get() : modelContext(mountPoint);
 358     }
 359
 360     // FIXME: why is this synchronized?
 361     public synchronized RestconfStrategy getRestconfStrategy(final DOMMountPoint mountPoint) {
 362         if (mountPoint == null) {
 363             return restconfStrategy;
 364         }
 365
 366         return RestconfStrategy.forMountPoint(mountPoint).orElseThrow(() -> {
 367             LOG.warn("Mount point {} does not expose a suitable access interface", mountPoint.getIdentifier());
 368             return new RestconfDocumentedException("Could not find a supported access interface in mount point "
 369                 + mountPoint.getIdentifier());
 370         });
 371     }
 372
 373     /**
 374      * Invoke Action operation.
 375      *
 376      * @param payload {@link NormalizedNodeContext} - the body of the operation
 377      * @return {@link NormalizedNodeContext} wrapped in {@link Response}
 378      */
 379     public Response invokeAction(final NormalizedNodeContext payload) {
 380         final InstanceIdentifierContext<?> context = payload.getInstanceIdentifierContext();
 381         final DOMMountPoint mountPoint = context.getMountPoint();
 382         final Absolute schemaPath = Absolute.of(ImmutableList.copyOf(context.getSchemaNode().getPath()
 383             .getPathFromRoot()));
 384         final YangInstanceIdentifier yangIIdContext = context.getInstanceIdentifier();
 385         final NormalizedNode data = payload.getData();
 386
 387         if (yangIIdContext.isEmpty()
 388             && !RestconfDataServiceConstant.NETCONF_BASE_QNAME.equals(data.getIdentifier().getNodeType())) {
 389             throw new RestconfDocumentedException("Instance identifier need to contain at least one path argument",
 390                 ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 391         }
 392
 393         final DOMActionResult response;
 394         final EffectiveModelContext schemaContextRef;
 395         if (mountPoint != null) {
 396             response = RestconfInvokeOperationsUtil.invokeAction((ContainerNode) data, schemaPath, yangIIdContext,
 397                 mountPoint);
 398             schemaContextRef = modelContext(mountPoint);
 399         } else {
 400             response = RestconfInvokeOperationsUtil.invokeAction((ContainerNode) data, schemaPath, yangIIdContext,
 401                 actionService);
 402             schemaContextRef = this.schemaContextHandler.get();
 403         }
 404         final DOMActionResult result = RestconfInvokeOperationsUtil.checkActionResponse(response);
 405
 406         ActionDefinition resultNodeSchema = null;
 407         ContainerNode resultData = null;
 408         if (result != null) {
 409             final Optional<ContainerNode> optOutput = result.getOutput();
 410             if (optOutput.isPresent()) {
 411                 resultData = optOutput.get();
 412                 resultNodeSchema = (ActionDefinition) context.getSchemaNode();
 413             }
 414         }
 415
 416         if (resultData != null && resultData.isEmpty()) {
 417             return Response.status(Status.NO_CONTENT).build();
 418         }
 419
 420         return Response.status(Status.OK)
 421             .entity(new NormalizedNodeContext(
 422                 new InstanceIdentifierContext<>(yangIIdContext, resultNodeSchema, mountPoint, schemaContextRef),
 423                 resultData))
 424             .build();
 425     }
 426
 427     /**
 428      * Valid input data with {@link SchemaNode}.
 429      *
 430      * @param schemaNode {@link SchemaNode}
 431      * @param payload    input data
 432      */
 433     @VisibleForTesting
 434     public static void validInputData(final SchemaNode schemaNode, final NormalizedNodeContext payload) {
 435         if (schemaNode != null && payload.getData() == null) {
 436             throw new RestconfDocumentedException("Input is required.", ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 437         } else if (schemaNode == null && payload.getData() != null) {
 438             throw new RestconfDocumentedException("No input expected.", ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 439         }
 440     }
 441
 442     /**
 443      * Valid top level node name.
 444      *
 445      * @param path    path of node
 446      * @param payload data
 447      */
 448     @VisibleForTesting
 449     public static void validTopLevelNodeName(final YangInstanceIdentifier path, final NormalizedNodeContext payload) {
 450         final String payloadName = payload.getData().getIdentifier().getNodeType().getLocalName();
 451
 452         if (path.isEmpty()) {
 453             if (!payload.getData().getIdentifier().getNodeType().equals(
 454                 RestconfDataServiceConstant.NETCONF_BASE_QNAME)) {
 455                 throw new RestconfDocumentedException("Instance identifier has to contain at least one path argument",
 456                         ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 457             }
 458         } else {
 459             final String identifierName = path.getLastPathArgument().getNodeType().getLocalName();
 460             if (!payloadName.equals(identifierName)) {
 461                 throw new RestconfDocumentedException(
 462                         "Payload name (" + payloadName + ") is different from identifier name (" + identifierName + ")",
 463                         ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE);
 464             }
 465         }
 466     }
 467
 468
 469     /**
 470      * Validates whether keys in {@code payload} are equal to values of keys in
 471      * {@code iiWithData} for list schema node.
 472      *
 473      * @throws RestconfDocumentedException if key values or key count in payload and URI isn't equal
 474      */
 475     @VisibleForTesting
 476     public static void validateListKeysEqualityInPayloadAndUri(final NormalizedNodeContext payload) {
 477         final InstanceIdentifierContext<?> iiWithData = payload.getInstanceIdentifierContext();
 478         final PathArgument lastPathArgument = iiWithData.getInstanceIdentifier().getLastPathArgument();
 479         final SchemaNode schemaNode = iiWithData.getSchemaNode();
 480         final NormalizedNode data = payload.getData();
 481         if (schemaNode instanceof ListSchemaNode) {
 482             final List<QName> keyDefinitions = ((ListSchemaNode) schemaNode).getKeyDefinition();
 483             if (lastPathArgument instanceof NodeIdentifierWithPredicates && data instanceof MapEntryNode) {
 484                 final Map<QName, Object> uriKeyValues = ((NodeIdentifierWithPredicates) lastPathArgument).asMap();
 485                 isEqualUriAndPayloadKeyValues(uriKeyValues, (MapEntryNode) data, keyDefinitions);
 486             }
 487         }
 488     }
 489
 490     private static void isEqualUriAndPayloadKeyValues(final Map<QName, Object> uriKeyValues, final MapEntryNode payload,
 491             final List<QName> keyDefinitions) {
 492         final Map<QName, Object> mutableCopyUriKeyValues = new HashMap<>(uriKeyValues);
 493         for (final QName keyDefinition : keyDefinitions) {
 494             final Object uriKeyValue = RestconfDocumentedException.throwIfNull(
 495                     mutableCopyUriKeyValues.remove(keyDefinition), ErrorType.PROTOCOL, ErrorTag.DATA_MISSING,
 496                     "Missing key %s in URI.", keyDefinition);
 497
 498             final Object dataKeyValue = payload.getIdentifier().getValue(keyDefinition);
 499
 500             if (!uriKeyValue.equals(dataKeyValue)) {
 501                 final String errMsg = "The value '" + uriKeyValue + "' for key '" + keyDefinition.getLocalName()
 502                         + "' specified in the URI doesn't match the value '" + dataKeyValue
 503                         + "' specified in the message body. ";
 504                 throw new RestconfDocumentedException(errMsg, ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE);
 505             }
 506         }
 507     }
 508
 509     private static EffectiveModelContext modelContext(final DOMMountPoint mountPoint) {
 510         return mountPoint.getService(DOMSchemaService.class)
 511             .flatMap(svc -> Optional.ofNullable(svc.getGlobalContext()))
 512             .orElse(null);
 513     }
 514 }