restconf/restconf-nb-rfc8040/src/main/java/org/opendaylight/restconf/nb/rfc8040/rests/utils/ReadDataTransactionUtil.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.utils;
   9
  10 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAMS_PATH;
  11 import static org.opendaylight.restconf.nb.rfc8040.rests.utils.RestconfStreamsConstants.STREAM_PATH_PART;
  12 import com.google.common.base.Optional;
  13 import com.google.common.primitives.Ints;
  14 import com.google.common.util.concurrent.CheckedFuture;
  15 import java.net.URI;
  16 import java.util.Collection;
  17 import java.util.Collections;
  18 import java.util.List;
  19 import java.util.Map;
  20 import java.util.function.Function;
  21 import java.util.stream.Collectors;
  22 import javax.annotation.Nonnull;
  23 import javax.annotation.Nullable;
  24 import javax.ws.rs.core.UriInfo;
  25 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  26 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  27 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
  28 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
  29 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
  30 import org.opendaylight.restconf.common.context.WriterParameters;
  31 import org.opendaylight.restconf.common.context.WriterParameters.WriterParametersBuilder;
  32 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
  33 import org.opendaylight.restconf.common.errors.RestconfError;
  34 import org.opendaylight.restconf.nb.rfc8040.references.SchemaContextRef;
  35 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.TransactionVarsWrapper;
  36 import org.opendaylight.restconf.nb.rfc8040.streams.listeners.NotificationListenerAdapter;
  37 import org.opendaylight.restconf.nb.rfc8040.utils.mapping.RestconfMappingNodeUtil;
  38 import org.opendaylight.restconf.nb.rfc8040.utils.parser.ParserFieldsParameter;
  39 import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
  40 import org.opendaylight.yangtools.yang.common.QName;
  41 import org.opendaylight.yangtools.yang.common.QNameModule;
  42 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  43 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
  44 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  45 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
  46 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
  47 import org.opendaylight.yangtools.yang.data.api.schema.AugmentationNode;
  48 import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
  49 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  50 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
  51 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
  52 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
  53 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
  54 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  55 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
  56 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
  57 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.CollectionNodeBuilder;
  58 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeAttrBuilder;
  59 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeBuilder;
  60 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeAttrBuilder;
  61 import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeContainerBuilder;
  62 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextTree;
  63 import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
  64 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
  65 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
  66 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
  67 import org.opendaylight.yangtools.yang.model.api.NotificationDefinition;
  68 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
  69 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  70
  71 /**
  72  * Util class for read data from data store via transaction.
  73  * <ul>
  74  * <li>config
  75  * <li>state
  76  * <li>all (config + state)
  77  * </ul>
  78  *
  79  */
  80 public final class ReadDataTransactionUtil {
  81
  82     private ReadDataTransactionUtil() {
  83         throw new UnsupportedOperationException("Util class.");
  84     }
  85
  86     /**
  87      * Parse parameters from URI request and check their types and values.
  88      *
  89      *
  90      * @param identifier
  91      *             {@link InstanceIdentifierContext}
  92      * @param uriInfo
  93      *             URI info
  94      * @param tagged
  95      *             set tagged for {@link WriterParameters}
  96      * @return {@link WriterParameters}
  97      */
  98     @Nonnull
  99     public static WriterParameters parseUriParameters(@Nonnull final InstanceIdentifierContext<?> identifier,
 100             @Nullable final UriInfo uriInfo, final boolean tagged) {
 101         return parseParams(identifier, uriInfo, tagged);
 102     }
 103
 104     /**
 105      * Parse parameters from URI request and check their types and values.
 106      *
 107      *
 108      * @param identifier
 109      *             {@link InstanceIdentifierContext}
 110      * @param uriInfo
 111      *             URI info
 112      * @return {@link WriterParameters}
 113      */
 114     @Nonnull
 115     public static WriterParameters parseUriParameters(@Nonnull final InstanceIdentifierContext<?> identifier,
 116                                                                @Nullable final UriInfo uriInfo) {
 117         return parseParams(identifier, uriInfo, false);
 118     }
 119
 120     private static WriterParameters parseParams(final InstanceIdentifierContext<?> identifier, final UriInfo uriInfo,
 121             final boolean tagged) {
 122         final WriterParametersBuilder builder = new WriterParametersBuilder();
 123         builder.setTagged(tagged);
 124
 125         if (uriInfo == null) {
 126             return builder.build();
 127         }
 128
 129         // check only allowed parameters
 130         ParametersUtil.checkParametersTypes(
 131                 RestconfDataServiceConstant.ReadData.READ_TYPE_TX,
 132                 uriInfo.getQueryParameters().keySet(),
 133                 RestconfDataServiceConstant.ReadData.CONTENT,
 134                 RestconfDataServiceConstant.ReadData.DEPTH,
 135                 RestconfDataServiceConstant.ReadData.FIELDS, RestconfDataServiceConstant.ReadData.WITH_DEFAULTS);
 136
 137         // read parameters from URI or set default values
 138         final List<String> content = uriInfo.getQueryParameters().getOrDefault(
 139                 RestconfDataServiceConstant.ReadData.CONTENT,
 140                 Collections.singletonList(RestconfDataServiceConstant.ReadData.ALL));
 141         final List<String> depth = uriInfo.getQueryParameters().getOrDefault(
 142                 RestconfDataServiceConstant.ReadData.DEPTH,
 143                 Collections.singletonList(RestconfDataServiceConstant.ReadData.UNBOUNDED));
 144         // fields
 145         final List<String> fields = uriInfo.getQueryParameters().getOrDefault(
 146                 RestconfDataServiceConstant.ReadData.FIELDS,
 147                 Collections.emptyList());
 148
 149         // parameter can be in URI at most once
 150         ParametersUtil.checkParameterCount(content, RestconfDataServiceConstant.ReadData.CONTENT);
 151         ParametersUtil.checkParameterCount(depth, RestconfDataServiceConstant.ReadData.DEPTH);
 152         ParametersUtil.checkParameterCount(fields, RestconfDataServiceConstant.ReadData.FIELDS);
 153
 154         // check and set content
 155         final String contentValue = content.get(0);
 156         if (!contentValue.equals(RestconfDataServiceConstant.ReadData.ALL)) {
 157             if (!contentValue.equals(RestconfDataServiceConstant.ReadData.CONFIG)
 158                     && !contentValue.equals(RestconfDataServiceConstant.ReadData.NONCONFIG)) {
 159                 throw new RestconfDocumentedException(
 160                         new RestconfError(RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.INVALID_VALUE,
 161                                 "Invalid content parameter: " + contentValue, null,
 162                                 "The content parameter value must be either config, nonconfig or all (default)"));
 163             }
 164         }
 165
 166         builder.setContent(content.get(0));
 167
 168         // check and set depth
 169         if (!depth.get(0).equals(RestconfDataServiceConstant.ReadData.UNBOUNDED)) {
 170             final Integer value = Ints.tryParse(depth.get(0));
 171
 172             if ((value == null)
 173                     || (!((value >= RestconfDataServiceConstant.ReadData.MIN_DEPTH)
 174                         && (value <= RestconfDataServiceConstant.ReadData.MAX_DEPTH)))) {
 175                 throw new RestconfDocumentedException(
 176                         new RestconfError(RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.INVALID_VALUE,
 177                                 "Invalid depth parameter: " + depth, null,
 178                                 "The depth parameter must be an integer between 1 and 65535 or \"unbounded\""));
 179             } else {
 180                 builder.setDepth(value);
 181             }
 182         }
 183
 184         // check and set fields
 185         if (!fields.isEmpty()) {
 186             builder.setFields(ParserFieldsParameter.parseFieldsParameter(identifier, fields.get(0)));
 187         }
 188
 189         return builder.build();
 190     }
 191
 192     /**
 193      * Read specific type of data from data store via transaction.
 194      *
 195      * @param valueOfContent
 196      *            type of data to read (config, state, all)
 197      * @param transactionNode
 198      *            {@link TransactionVarsWrapper} - wrapper for variables
 199      * @param schemaContext
 200      * @return {@link NormalizedNode}
 201      */
 202     @Nullable
 203     public static NormalizedNode<?, ?> readData(@Nonnull final String valueOfContent,
 204             @Nonnull final TransactionVarsWrapper transactionNode, final SchemaContext schemaContext) {
 205         return readData(valueOfContent, transactionNode, null, schemaContext);
 206     }
 207
 208     /**
 209      * Read specific type of data from data store via transaction.
 210      *
 211      * @param valueOfContent
 212      *            type of data to read (config, state, all)
 213      * @param transactionNode
 214      *            {@link TransactionVarsWrapper} - wrapper for variables
 215      * @param withDefa
 216      *            vaule of with-defaults parameter
 217      * @param ctx
 218      * @return {@link NormalizedNode}
 219      */
 220     @Nullable
 221     public static NormalizedNode<?, ?> readData(@Nonnull final String valueOfContent,
 222             @Nonnull final TransactionVarsWrapper transactionNode, final String withDefa, final SchemaContext ctx) {
 223         switch (valueOfContent) {
 224             case RestconfDataServiceConstant.ReadData.CONFIG:
 225                 transactionNode.setLogicalDatastoreType(LogicalDatastoreType.CONFIGURATION);
 226                 if (withDefa == null) {
 227                     return readDataViaTransaction(transactionNode);
 228                 } else {
 229                     return prepareDataByParamWithDef(readDataViaTransaction(transactionNode),
 230                             transactionNode.getInstanceIdentifier().getInstanceIdentifier(), withDefa, ctx);
 231                 }
 232             case RestconfDataServiceConstant.ReadData.NONCONFIG:
 233                 transactionNode.setLogicalDatastoreType(LogicalDatastoreType.OPERATIONAL);
 234                 return readDataViaTransaction(transactionNode);
 235
 236             case RestconfDataServiceConstant.ReadData.ALL:
 237                 return readAllData(transactionNode, withDefa, ctx);
 238
 239             default:
 240                 throw new RestconfDocumentedException(
 241                         new RestconfError(RestconfError.ErrorType.PROTOCOL, RestconfError.ErrorTag.INVALID_VALUE,
 242                                 "Invalid content parameter: " + valueOfContent, null,
 243                                 "The content parameter value must be either config, nonconfig or all (default)"));
 244         }
 245     }
 246
 247     /**
 248      * Read specific type of data from data store via transaction and if identifier read data from
 249      * streams then put streams from actual schema context to datastore.
 250      *
 251      * @param identifier
 252      *             identifier of data to read
 253      * @param content
 254      *             type of data to read (config, state, all)
 255      * @param transactionNode
 256      *             {@link TransactionVarsWrapper} - wrapper for variables
 257      * @param withDefa
 258      *             vaule of with-defaults parameter
 259      * @param schemaContextRef
 260      *             schema context
 261      * @param uriInfo
 262      *             uri info
 263      * @return {@link NormalizedNode}
 264      */
 265     public static NormalizedNode<?, ?> readData(final String identifier, final String content,
 266                                                 final TransactionVarsWrapper transactionNode, final String withDefa,
 267                                                 final SchemaContextRef schemaContextRef, final UriInfo uriInfo) {
 268         final SchemaContext schemaContext = schemaContextRef.get();
 269         if (identifier.contains(STREAMS_PATH) && !identifier.contains(STREAM_PATH_PART)) {
 270             final DOMDataReadWriteTransaction wTx = transactionNode.getTransactionChain().newReadWriteTransaction();
 271             final boolean exist = SubscribeToStreamUtil.checkExist(schemaContext, wTx);
 272
 273             for (final NotificationDefinition notificationDefinition : schemaContextRef.get().getNotifications()) {
 274                 final List<NotificationListenerAdapter> notifiStreamXML =
 275                         CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContextRef,
 276                                 NotificationOutputType.XML.getName());
 277                 final List<NotificationListenerAdapter> notifiStreamJSON =
 278                         CreateStreamUtil.createYangNotifiStream(notificationDefinition, schemaContextRef,
 279                                 NotificationOutputType.JSON.getName());
 280                 notifiStreamJSON.addAll(notifiStreamXML);
 281
 282                 for (final NotificationListenerAdapter listener : notifiStreamJSON) {
 283                     final URI uri = SubscribeToStreamUtil.prepareUriByStreamName(uriInfo, listener.getStreamName());
 284                     final NormalizedNode mapToStreams =
 285                             RestconfMappingNodeUtil.mapYangNotificationStreamByIetfRestconfMonitoring(
 286                                     listener.getSchemaPath().getLastComponent(), schemaContext.getNotifications(),
 287                                     null, listener.getOutputType(), uri,
 288                                     SubscribeToStreamUtil.getMonitoringModule(schemaContext), exist);
 289                     SubscribeToStreamUtil.writeDataToDS(schemaContext,
 290                             listener.getSchemaPath().getLastComponent().getLocalName(), wTx, exist,
 291                             mapToStreams);
 292                 }
 293             }
 294             SubscribeToStreamUtil.submitData(wTx);
 295         }
 296         return readData(content, transactionNode, withDefa, schemaContext);
 297     }
 298
 299     private static NormalizedNode<?, ?> prepareDataByParamWithDef(final NormalizedNode<?, ?> result,
 300             final YangInstanceIdentifier path, final String withDefa, final SchemaContext ctx) {
 301         boolean trim;
 302         switch (withDefa) {
 303             case "trim":
 304                 trim = true;
 305                 break;
 306             case "explicit":
 307                 trim = false;
 308                 break;
 309             default:
 310                 throw new RestconfDocumentedException("");
 311         }
 312
 313         final DataSchemaContextTree baseSchemaCtxTree = DataSchemaContextTree.from(ctx);
 314         final DataSchemaNode baseSchemaNode = baseSchemaCtxTree.getChild(path).getDataSchemaNode();
 315         if (result instanceof ContainerNode) {
 316             final DataContainerNodeAttrBuilder<NodeIdentifier, ContainerNode> builder =
 317                     Builders.containerBuilder((ContainerSchemaNode) baseSchemaNode);
 318             buildCont(builder, (ContainerNode) result, baseSchemaCtxTree, path, trim);
 319             return builder.build();
 320         } else {
 321             final DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> builder =
 322                     Builders.mapEntryBuilder((ListSchemaNode) baseSchemaNode);
 323             buildMapEntryBuilder(builder, (MapEntryNode) result, baseSchemaCtxTree, path, trim,
 324                     ((ListSchemaNode) baseSchemaNode).getKeyDefinition());
 325             return builder.build();
 326         }
 327     }
 328
 329     private static void buildMapEntryBuilder(
 330             final DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> builder,
 331             final MapEntryNode result, final DataSchemaContextTree baseSchemaCtxTree,
 332             final YangInstanceIdentifier actualPath, final boolean trim, final List<QName> keys) {
 333         for (final DataContainerChild<? extends PathArgument, ?> child : result.getValue()) {
 334             final YangInstanceIdentifier path = actualPath.node(child.getIdentifier());
 335             final DataSchemaNode childSchema = baseSchemaCtxTree.getChild(path).getDataSchemaNode();
 336             if (child instanceof ContainerNode) {
 337                 final DataContainerNodeAttrBuilder<NodeIdentifier, ContainerNode> childBuilder =
 338                         Builders.containerBuilder((ContainerSchemaNode) childSchema);
 339                 buildCont(childBuilder, (ContainerNode) child, baseSchemaCtxTree, path, trim);
 340                 builder.withChild(childBuilder.build());
 341             } else if (child instanceof MapNode) {
 342                 final CollectionNodeBuilder<MapEntryNode, MapNode> childBuilder =
 343                         Builders.mapBuilder((ListSchemaNode) childSchema);
 344                 buildList(childBuilder, (MapNode) child, baseSchemaCtxTree, path, trim,
 345                         ((ListSchemaNode) childSchema).getKeyDefinition());
 346                 builder.withChild(childBuilder.build());
 347             } else if (child instanceof LeafNode) {
 348                 final String defaultVal = ((LeafSchemaNode) childSchema).getDefault();
 349                 final String nodeVal = ((LeafNode<String>) child).getValue();
 350                 final NormalizedNodeAttrBuilder<NodeIdentifier, Object, LeafNode<Object>> leafBuilder =
 351                         Builders.leafBuilder((LeafSchemaNode) childSchema);
 352                 if (keys.contains(child.getNodeType())) {
 353                     leafBuilder.withValue(((LeafNode) child).getValue());
 354                     builder.withChild(leafBuilder.build());
 355                 } else {
 356                     if (trim) {
 357                         if ((defaultVal == null) || !defaultVal.equals(nodeVal)) {
 358                             leafBuilder.withValue(((LeafNode) child).getValue());
 359                             builder.withChild(leafBuilder.build());
 360                         }
 361                     } else {
 362                         if ((defaultVal != null) && defaultVal.equals(nodeVal)) {
 363                             leafBuilder.withValue(((LeafNode) child).getValue());
 364                             builder.withChild(leafBuilder.build());
 365                         }
 366                     }
 367                 }
 368             }
 369         }
 370     }
 371
 372     private static void buildList(final CollectionNodeBuilder<MapEntryNode, MapNode> builder, final MapNode result,
 373             final DataSchemaContextTree baseSchemaCtxTree, final YangInstanceIdentifier path, final boolean trim,
 374             final List<QName> keys) {
 375         for (final MapEntryNode mapEntryNode : result.getValue()) {
 376             final YangInstanceIdentifier actualNode = path.node(mapEntryNode.getIdentifier());
 377             final DataSchemaNode childSchema = baseSchemaCtxTree.getChild(actualNode).getDataSchemaNode();
 378             final DataContainerNodeAttrBuilder<NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder =
 379                     Builders.mapEntryBuilder((ListSchemaNode) childSchema);
 380             buildMapEntryBuilder(mapEntryBuilder, mapEntryNode, baseSchemaCtxTree, actualNode, trim, keys);
 381             builder.withChild(mapEntryBuilder.build());
 382         }
 383     }
 384
 385     private static void buildCont(final DataContainerNodeAttrBuilder<NodeIdentifier, ContainerNode> builder,
 386             final ContainerNode result, final DataSchemaContextTree baseSchemaCtxTree,
 387             final YangInstanceIdentifier actualPath, final boolean trim) {
 388         for (final DataContainerChild<? extends PathArgument, ?> child : result.getValue()) {
 389             final YangInstanceIdentifier path = actualPath.node(child.getIdentifier());
 390             final DataSchemaNode childSchema = baseSchemaCtxTree.getChild(path).getDataSchemaNode();
 391             if (child instanceof ContainerNode) {
 392                 final DataContainerNodeAttrBuilder<NodeIdentifier, ContainerNode> builderChild =
 393                         Builders.containerBuilder((ContainerSchemaNode) childSchema);
 394                 buildCont(builderChild, result, baseSchemaCtxTree, actualPath, trim);
 395                 builder.withChild(builderChild.build());
 396             } else if (child instanceof MapNode) {
 397                 final CollectionNodeBuilder<MapEntryNode, MapNode> childBuilder =
 398                         Builders.mapBuilder((ListSchemaNode) childSchema);
 399                 buildList(childBuilder, (MapNode) child, baseSchemaCtxTree, path, trim,
 400                         ((ListSchemaNode) childSchema).getKeyDefinition());
 401                 builder.withChild(childBuilder.build());
 402             } else if (child instanceof LeafNode) {
 403                 final String defaultVal = ((LeafSchemaNode) childSchema).getDefault();
 404                 final String nodeVal = ((LeafNode<String>) child).getValue();
 405                 final NormalizedNodeAttrBuilder<NodeIdentifier, Object, LeafNode<Object>> leafBuilder =
 406                         Builders.leafBuilder((LeafSchemaNode) childSchema);
 407                 if (trim) {
 408                     if ((defaultVal == null) || !defaultVal.equals(nodeVal)) {
 409                         leafBuilder.withValue(((LeafNode) child).getValue());
 410                         builder.withChild(leafBuilder.build());
 411                     }
 412                 } else {
 413                     if ((defaultVal != null) && defaultVal.equals(nodeVal)) {
 414                         leafBuilder.withValue(((LeafNode) child).getValue());
 415                         builder.withChild(leafBuilder.build());
 416                     }
 417                 }
 418             }
 419         }
 420     }
 421
 422     /**
 423      * If is set specific {@link LogicalDatastoreType} in
 424      * {@link TransactionVarsWrapper}, then read this type of data from DS. If
 425      * don't, we have to read all data from DS (state + config)
 426      *
 427      * @param transactionNode
 428      *             {@link TransactionVarsWrapper} - wrapper for variables
 429      * @return {@link NormalizedNode}
 430      */
 431     @Nullable
 432     private static NormalizedNode<?, ?> readDataViaTransaction(
 433             @Nonnull final TransactionVarsWrapper transactionNode) {
 434         final NormalizedNodeFactory dataFactory = new NormalizedNodeFactory();
 435         try (DOMDataReadOnlyTransaction tx = transactionNode.getTransactionChain().newReadOnlyTransaction()) {
 436             final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> listenableFuture = tx.read(
 437                 transactionNode.getLogicalDatastoreType(),
 438                 transactionNode.getInstanceIdentifier().getInstanceIdentifier());
 439             FutureCallbackTx.addCallback(listenableFuture, RestconfDataServiceConstant.ReadData.READ_TYPE_TX,
 440                 dataFactory);
 441         }
 442         return dataFactory.build();
 443     }
 444
 445     /**
 446      * Read config and state data, then map them.
 447      *
 448      * @param transactionNode
 449      *            {@link TransactionVarsWrapper} - wrapper for variables
 450      * @param withDefa
 451      *            with-defaults parameter
 452      * @param ctx
 453      * @return {@link NormalizedNode}
 454      */
 455     @Nullable
 456     private static NormalizedNode<?, ?> readAllData(@Nonnull final TransactionVarsWrapper transactionNode,
 457             final String withDefa, final SchemaContext ctx) {
 458         // PREPARE STATE DATA NODE
 459         transactionNode.setLogicalDatastoreType(LogicalDatastoreType.OPERATIONAL);
 460         final NormalizedNode<?, ?> stateDataNode = readDataViaTransaction(transactionNode);
 461
 462         // PREPARE CONFIG DATA NODE
 463         transactionNode.setLogicalDatastoreType(LogicalDatastoreType.CONFIGURATION);
 464         final NormalizedNode<?, ?> configDataNode;
 465         if (withDefa == null) {
 466             configDataNode = readDataViaTransaction(transactionNode);
 467         } else {
 468             configDataNode = prepareDataByParamWithDef(readDataViaTransaction(transactionNode),
 469                     transactionNode.getInstanceIdentifier().getInstanceIdentifier(), withDefa, ctx);
 470         }
 471
 472         // if no data exists
 473         if ((stateDataNode == null) && (configDataNode == null)) {
 474             return null;
 475         }
 476
 477         // return config data
 478         if (stateDataNode == null) {
 479             return configDataNode;
 480         }
 481
 482         // return state data
 483         if (configDataNode == null) {
 484             return stateDataNode;
 485         }
 486
 487         // merge data from config and state
 488         return mapNode(stateDataNode, configDataNode);
 489     }
 490
 491     /**
 492      * Map data by type of read node.
 493      *
 494      * @param stateDataNode
 495      *             data node of state data
 496      * @param configDataNode
 497      *             data node of config data
 498      * @return {@link NormalizedNode}
 499      */
 500     @Nonnull
 501     private static NormalizedNode<?, ?> mapNode(@Nonnull final NormalizedNode<?, ?> stateDataNode,
 502                                                          @Nonnull final NormalizedNode<?, ?> configDataNode) {
 503         validPossibilityOfMergeNodes(stateDataNode, configDataNode);
 504         if (configDataNode instanceof RpcDefinition) {
 505             return prepareRpcData(configDataNode, stateDataNode);
 506         } else {
 507             return prepareData(configDataNode, stateDataNode);
 508         }
 509     }
 510
 511     /**
 512      * Valid of can be data merged together.
 513      *
 514      * @param stateDataNode
 515      *             data node of state data
 516      * @param configDataNode
 517      *             data node of config data
 518      */
 519     private static void validPossibilityOfMergeNodes(@Nonnull final NormalizedNode<?, ?> stateDataNode,
 520                                                      @Nonnull final NormalizedNode<?, ?> configDataNode) {
 521         final QNameModule moduleOfStateData = stateDataNode.getIdentifier().getNodeType().getModule();
 522         final QNameModule moduleOfConfigData = configDataNode.getIdentifier().getNodeType().getModule();
 523         if (moduleOfStateData != moduleOfConfigData) {
 524             throw new RestconfDocumentedException("It is not possible to merge ");
 525         }
 526     }
 527
 528     /**
 529      * Prepare and map data for rpc.
 530      *
 531      * @param configDataNode
 532      *             data node of config data
 533      * @param stateDataNode
 534      *             data node of state data
 535      * @return {@link NormalizedNode}
 536      */
 537     @Nonnull
 538     private static NormalizedNode<?, ?> prepareRpcData(@Nonnull final NormalizedNode<?, ?> configDataNode,
 539                                                                 @Nonnull final NormalizedNode<?, ?> stateDataNode) {
 540         final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder = ImmutableNodes
 541                 .mapEntryBuilder();
 542         mapEntryBuilder.withNodeIdentifier((NodeIdentifierWithPredicates) configDataNode.getIdentifier());
 543
 544         // MAP CONFIG DATA
 545         mapRpcDataNode(configDataNode, mapEntryBuilder);
 546         // MAP STATE DATA
 547         mapRpcDataNode(stateDataNode, mapEntryBuilder);
 548
 549         return ImmutableNodes.mapNodeBuilder(configDataNode.getNodeType()).addChild(mapEntryBuilder.build()).build();
 550     }
 551
 552     /**
 553      * Map node to map entry builder.
 554      *
 555      * @param dataNode
 556      *             data node
 557      * @param mapEntryBuilder
 558      *             builder for mapping data
 559      */
 560     private static void mapRpcDataNode(@Nonnull final NormalizedNode<?, ?> dataNode,
 561                                        @Nonnull final DataContainerNodeBuilder<
 562                                                NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder) {
 563         ((ContainerNode) dataNode).getValue().forEach(mapEntryBuilder::addChild);
 564     }
 565
 566     /**
 567      * Prepare and map all data from DS.
 568      *
 569      * @param configDataNode
 570      *             data node of config data
 571      * @param stateDataNode
 572      *             data node of state data
 573      * @return {@link NormalizedNode}
 574      */
 575     @Nonnull
 576     private static NormalizedNode<?, ?> prepareData(@Nonnull final NormalizedNode<?, ?> configDataNode,
 577                                                              @Nonnull final NormalizedNode<?, ?> stateDataNode) {
 578         if (configDataNode instanceof MapNode) {
 579             final CollectionNodeBuilder<MapEntryNode, MapNode> builder = ImmutableNodes
 580                     .mapNodeBuilder().withNodeIdentifier(((MapNode) configDataNode).getIdentifier());
 581
 582             mapValueToBuilder(
 583                     ((MapNode) configDataNode).getValue(), ((MapNode) stateDataNode).getValue(), builder);
 584
 585             return builder.build();
 586         } else if (configDataNode instanceof MapEntryNode) {
 587             final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> builder = ImmutableNodes
 588                     .mapEntryBuilder().withNodeIdentifier(((MapEntryNode) configDataNode).getIdentifier());
 589
 590             mapValueToBuilder(
 591                     ((MapEntryNode) configDataNode).getValue(), ((MapEntryNode) stateDataNode).getValue(), builder);
 592
 593             return builder.build();
 594         } else if (configDataNode instanceof ContainerNode) {
 595             final DataContainerNodeAttrBuilder<NodeIdentifier, ContainerNode> builder = Builders
 596                     .containerBuilder().withNodeIdentifier(((ContainerNode) configDataNode).getIdentifier());
 597
 598             mapValueToBuilder(
 599                     ((ContainerNode) configDataNode).getValue(), ((ContainerNode) stateDataNode).getValue(), builder);
 600
 601             return builder.build();
 602         } else if (configDataNode instanceof AugmentationNode) {
 603             final DataContainerNodeBuilder<AugmentationIdentifier, AugmentationNode> builder = Builders
 604                     .augmentationBuilder().withNodeIdentifier(((AugmentationNode) configDataNode).getIdentifier());
 605
 606             mapValueToBuilder(((AugmentationNode) configDataNode).getValue(),
 607                     ((AugmentationNode) stateDataNode).getValue(), builder);
 608
 609             return builder.build();
 610         } else if (configDataNode instanceof ChoiceNode) {
 611             final DataContainerNodeBuilder<NodeIdentifier, ChoiceNode> builder = Builders
 612                     .choiceBuilder().withNodeIdentifier(((ChoiceNode) configDataNode).getIdentifier());
 613
 614             mapValueToBuilder(
 615                     ((ChoiceNode) configDataNode).getValue(), ((ChoiceNode) stateDataNode).getValue(), builder);
 616
 617             return builder.build();
 618         } else if (configDataNode instanceof LeafNode) {
 619             return ImmutableNodes.leafNode(configDataNode.getNodeType(), configDataNode.getValue());
 620         } else {
 621             throw new RestconfDocumentedException("Bad type of node.");
 622         }
 623     }
 624
 625     /**
 626      * Map value from container node to builder.
 627      *
 628      * @param configData
 629      *             collection of config data nodes
 630      * @param stateData
 631      *             collection of state data nodes
 632      * @param builder
 633      *             builder
 634      */
 635     private static <T extends NormalizedNode<? extends PathArgument, ?>> void mapValueToBuilder(
 636             @Nonnull final Collection<T> configData,
 637             @Nonnull final Collection<T> stateData,
 638             @Nonnull final NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
 639         final Map<PathArgument, T> configMap = configData.stream().collect(
 640                 Collectors.toMap(NormalizedNode::getIdentifier, Function.identity()));
 641         final Map<PathArgument, T> stateMap = stateData.stream().collect(
 642                 Collectors.toMap(NormalizedNode::getIdentifier, Function.identity()));
 643
 644         // merge config and state data of children with different identifiers
 645         mapDataToBuilder(configMap, stateMap, builder);
 646
 647         // merge config and state data of children with the same identifiers
 648         mergeDataToBuilder(configMap, stateMap, builder);
 649     }
 650
 651     /**
 652      * Map data with different identifiers to builder. Data with different identifiers can be just added
 653      * as childs to parent node.
 654      *
 655      * @param configMap
 656      *             map of config data nodes
 657      * @param stateMap
 658      *             map of state data nodes
 659      * @param builder
 660      *           - builder
 661      */
 662     private static <T extends NormalizedNode<? extends PathArgument, ?>> void mapDataToBuilder(
 663             @Nonnull final Map<PathArgument, T> configMap,
 664             @Nonnull final Map<PathArgument, T> stateMap,
 665             @Nonnull final NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
 666         configMap.entrySet().stream().filter(x -> !stateMap.containsKey(x.getKey())).forEach(
 667             y -> builder.addChild(y.getValue()));
 668         stateMap.entrySet().stream().filter(x -> !configMap.containsKey(x.getKey())).forEach(
 669             y -> builder.addChild(y.getValue()));
 670     }
 671
 672     /**
 673      * Map data with the same identifiers to builder. Data with the same identifiers cannot be just added but we need to
 674      * go one level down with {@code prepareData} method.
 675      *
 676      * @param configMap
 677      *             immutable config data
 678      * @param stateMap
 679      *             immutable state data
 680      * @param builder
 681      *           - builder
 682      */
 683     @SuppressWarnings("unchecked")
 684     private static <T extends NormalizedNode<? extends PathArgument, ?>> void mergeDataToBuilder(
 685             @Nonnull final Map<PathArgument, T> configMap,
 686             @Nonnull final Map<PathArgument, T> stateMap,
 687             @Nonnull final NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
 688         // it is enough to process only config data because operational contains the same data
 689         configMap.entrySet().stream().filter(x -> stateMap.containsKey(x.getKey())).forEach(
 690             y -> builder.addChild((T) prepareData(y.getValue(), stateMap.get(y.getKey()))));
 691     }
 692 }