2 * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.restconf.nb.rfc8040.rests.utils;
10 import java.util.Collection;
11 import java.util.List;
13 import java.util.NoSuchElementException;
14 import java.util.function.Function;
15 import java.util.stream.Collectors;
16 import org.eclipse.jdt.annotation.NonNull;
17 import org.eclipse.jdt.annotation.Nullable;
18 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
19 import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
20 import org.opendaylight.restconf.api.query.ContentParam;
21 import org.opendaylight.restconf.api.query.WithDefaultsParam;
22 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
23 import org.opendaylight.restconf.nb.rfc8040.rests.transactions.RestconfStrategy;
24 import org.opendaylight.yangtools.yang.common.QName;
25 import org.opendaylight.yangtools.yang.common.QNameModule;
26 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
27 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
28 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
30 import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
31 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
32 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
33 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
34 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
35 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
36 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
37 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
38 import org.opendaylight.yangtools.yang.data.api.schema.SystemLeafSetNode;
39 import org.opendaylight.yangtools.yang.data.api.schema.SystemMapNode;
40 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
41 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
42 import org.opendaylight.yangtools.yang.data.api.schema.UserLeafSetNode;
43 import org.opendaylight.yangtools.yang.data.api.schema.UserMapNode;
44 import org.opendaylight.yangtools.yang.data.api.schema.builder.CollectionNodeBuilder;
45 import org.opendaylight.yangtools.yang.data.api.schema.builder.DataContainerNodeBuilder;
46 import org.opendaylight.yangtools.yang.data.api.schema.builder.NormalizedNodeContainerBuilder;
47 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
48 import org.opendaylight.yangtools.yang.data.util.DataSchemaContext;
49 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextTree;
50 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
51 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
52 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
53 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
54 import org.slf4j.Logger;
55 import org.slf4j.LoggerFactory;
58 * Util class for read data from data store via transaction.
62 * <li>all (config + state)
65 public final class ReadDataTransactionUtil {
66 private static final Logger LOG = LoggerFactory.getLogger(ReadDataTransactionUtil.class);
68 private ReadDataTransactionUtil() {
73 * Read specific type of data from data store via transaction. Close {@link DOMTransactionChain} if any
74 * inside of object {@link RestconfStrategy} provided as a parameter.
76 * @param content type of data to read (config, state, all)
77 * @param path the path to read
78 * @param strategy {@link RestconfStrategy} - object that perform the actual DS operations
79 * @param withDefa value of with-defaults parameter
80 * @param ctx schema context
81 * @return {@link NormalizedNode}
83 public static @Nullable NormalizedNode readData(final @NonNull ContentParam content,
84 final @NonNull YangInstanceIdentifier path, final @NonNull RestconfStrategy strategy,
85 final WithDefaultsParam withDefa, final EffectiveModelContext ctx) {
86 return switch (content) {
88 // PREPARE STATE DATA NODE
89 final var stateDataNode = readDataViaTransaction(strategy, LogicalDatastoreType.OPERATIONAL, path);
90 // PREPARE CONFIG DATA NODE
91 final var configDataNode = readDataViaTransaction(strategy, LogicalDatastoreType.CONFIGURATION, path);
93 yield mergeConfigAndSTateDataIfNeeded(stateDataNode, withDefa == null ? configDataNode
94 : prepareDataByParamWithDef(configDataNode, path, withDefa, ctx));
97 final var read = readDataViaTransaction(strategy, LogicalDatastoreType.CONFIGURATION, path);
98 yield withDefa == null ? read : prepareDataByParamWithDef(read, path, withDefa, ctx);
100 case NONCONFIG -> readDataViaTransaction(strategy, LogicalDatastoreType.OPERATIONAL, path);
105 * Read specific type of data from data store via transaction with specified subtrees that should only be read.
106 * Close {@link DOMTransactionChain} inside of object {@link RestconfStrategy} provided as a parameter.
108 * @param content type of data to read (config, state, all)
109 * @param path the parent path to read
110 * @param strategy {@link RestconfStrategy} - object that perform the actual DS operations
111 * @param withDefa value of with-defaults parameter
112 * @param ctx schema context
113 * @param fields paths to selected subtrees which should be read, relative to to the parent path
114 * @return {@link NormalizedNode}
116 public static @Nullable NormalizedNode readData(final @NonNull ContentParam content,
117 final @NonNull YangInstanceIdentifier path, final @NonNull RestconfStrategy strategy,
118 final @Nullable WithDefaultsParam withDefa, @NonNull final EffectiveModelContext ctx,
119 final @NonNull List<YangInstanceIdentifier> fields) {
120 return switch (content) {
122 // PREPARE STATE DATA NODE
123 final var stateDataNode = readDataViaTransaction(strategy, LogicalDatastoreType.OPERATIONAL, path,
125 // PREPARE CONFIG DATA NODE
126 final var configDataNode = readDataViaTransaction(strategy, LogicalDatastoreType.CONFIGURATION, path,
129 yield mergeConfigAndSTateDataIfNeeded(stateDataNode, withDefa == null ? configDataNode
130 : prepareDataByParamWithDef(configDataNode, path, withDefa, ctx));
133 final var read = readDataViaTransaction(strategy, LogicalDatastoreType.CONFIGURATION, path, fields);
134 yield withDefa == null ? read : prepareDataByParamWithDef(read, path, withDefa, ctx);
136 case NONCONFIG -> readDataViaTransaction(strategy, LogicalDatastoreType.OPERATIONAL, path, fields);
140 private static NormalizedNode prepareDataByParamWithDef(final NormalizedNode readData,
141 final YangInstanceIdentifier path, final WithDefaultsParam withDefa, final EffectiveModelContext ctx) {
142 final boolean trim = switch (withDefa) {
144 case EXPLICIT -> false;
145 case REPORT_ALL, REPORT_ALL_TAGGED -> throw new RestconfDocumentedException(
146 "Unsupported with-defaults value " + withDefa.paramValue());
149 final var ctxNode = DataSchemaContextTree.from(ctx).findChild(path).orElseThrow();
150 if (readData instanceof ContainerNode container) {
151 final var builder = Builders.containerBuilder().withNodeIdentifier(container.name());
152 buildCont(builder, container.body(), ctxNode, trim);
153 return builder.build();
154 } else if (readData instanceof MapEntryNode mapEntry) {
155 if (!(ctxNode.dataSchemaNode() instanceof ListSchemaNode listSchema)) {
156 throw new IllegalStateException("Input " + mapEntry + " does not match " + ctxNode);
159 final var builder = Builders.mapEntryBuilder().withNodeIdentifier(mapEntry.name());
160 buildMapEntryBuilder(builder, mapEntry.body(), ctxNode, trim, listSchema.getKeyDefinition());
161 return builder.build();
163 throw new IllegalStateException("Unhandled data contract " + readData.contract());
167 private static void buildMapEntryBuilder(
168 final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> builder,
169 final Collection<@NonNull DataContainerChild> children, final DataSchemaContext ctxNode,
170 final boolean trim, final List<QName> keys) {
171 for (var child : children) {
172 final var childCtx = getChildContext(ctxNode, child);
174 if (child instanceof ContainerNode container) {
175 appendContainer(builder, container, childCtx, trim);
176 } else if (child instanceof MapNode map) {
177 appendMap(builder, map, childCtx, trim);
178 } else if (child instanceof LeafNode<?> leaf) {
179 appendLeaf(builder, leaf, childCtx, trim, keys);
181 // FIXME: we should never hit this, throw an ISE if this ever happens
182 LOG.debug("Ignoring unhandled child contract {}", child.contract());
187 private static void appendContainer(final DataContainerNodeBuilder<?, ?> builder, final ContainerNode container,
188 final DataSchemaContext ctxNode, final boolean trim) {
189 final var childBuilder = Builders.containerBuilder().withNodeIdentifier(container.name());
190 buildCont(childBuilder, container.body(), ctxNode, trim);
191 builder.withChild(childBuilder.build());
194 private static void appendLeaf(final DataContainerNodeBuilder<?, ?> builder, final LeafNode<?> leaf,
195 final DataSchemaContext ctxNode, final boolean trim, final List<QName> keys) {
196 if (!(ctxNode.dataSchemaNode() instanceof LeafSchemaNode leafSchema)) {
197 throw new IllegalStateException("Input " + leaf + " does not match " + ctxNode);
200 // FIXME: Document now this works with the likes of YangInstanceIdentifier. I bet it does not.
201 final var defaultVal = leafSchema.getType().getDefaultValue().orElse(null);
203 // This is a combined check for when we need to emit the leaf.
205 // We always have to emit key leaf values
206 keys.contains(leafSchema.getQName())
207 // trim == WithDefaultsParam.TRIM and the source is assumed to store explicit values:
209 // When data is retrieved with a <with-defaults> parameter equal to
210 // 'trim', data nodes MUST NOT be reported if they contain the schema
211 // default value. Non-configuration data nodes containing the schema
212 // default value MUST NOT be reported.
214 || trim && (defaultVal == null || !defaultVal.equals(leaf.body()))
215 // !trim == WithDefaultsParam.EXPLICIT and the source is assume to store explicit values... but I fail to
216 // grasp what we are doing here... emit only if it matches default ???!!!
217 // FIXME: The WithDefaultsParam.EXPLICIT says:
219 // Data nodes set to the YANG default by the client are reported.
221 // and RFC8040 (https://www.rfc-editor.org/rfc/rfc8040#page-60) says:
223 // If the "with-defaults" parameter is set to "explicit", then the
224 // server MUST adhere to the default-reporting behavior defined in
225 // Section 3.3 of [RFC6243].
227 // and then RFC6243 (https://www.rfc-editor.org/rfc/rfc6243#section-3.3) says:
229 // When data is retrieved with a <with-defaults> parameter equal to
230 // 'explicit', a data node that was set by a client to its schema
231 // default value MUST be reported. A conceptual data node that would be
232 // set by the server to the schema default value MUST NOT be reported.
233 // Non-configuration data nodes containing the schema default value MUST
236 // (rovarga): The source reports explicitly-defined leaves and does *not* create defaults by itself.
237 // This seems to disregard the 'trim = true' case semantics (see above).
238 // Combining the above, though, these checks are missing the 'non-config' check, which would
239 // distinguish, but barring that this check is superfluous and results in the wrong semantics.
240 // Without that input, this really should be covered by the previous case.
241 || !trim && defaultVal != null && defaultVal.equals(leaf.body())) {
242 builder.withChild(leaf);
246 private static void appendMap(final DataContainerNodeBuilder<?, ?> builder, final MapNode map,
247 final DataSchemaContext childCtx, final boolean trim) {
248 if (!(childCtx.dataSchemaNode() instanceof ListSchemaNode listSchema)) {
249 throw new IllegalStateException("Input " + map + " does not match " + childCtx);
252 final var childBuilder = switch (map.ordering()) {
253 case SYSTEM -> Builders.mapBuilder();
254 case USER -> Builders.orderedMapBuilder();
256 buildList(childBuilder.withNodeIdentifier(map.name()), map.body(), childCtx, trim,
257 listSchema.getKeyDefinition());
258 builder.withChild(childBuilder.build());
261 private static void buildList(final CollectionNodeBuilder<MapEntryNode, ? extends MapNode> builder,
262 final Collection<@NonNull MapEntryNode> entries, final DataSchemaContext ctxNode, final boolean trim,
263 final List<@NonNull QName> keys) {
264 for (var entry : entries) {
265 final var childCtx = getChildContext(ctxNode, entry);
266 final var mapEntryBuilder = Builders.mapEntryBuilder().withNodeIdentifier(entry.name());
267 buildMapEntryBuilder(mapEntryBuilder, entry.body(), childCtx, trim, keys);
268 builder.withChild(mapEntryBuilder.build());
272 private static void buildCont(final DataContainerNodeBuilder<NodeIdentifier, ContainerNode> builder,
273 final Collection<DataContainerChild> children, final DataSchemaContext ctxNode, final boolean trim) {
274 for (var child : children) {
275 final var childCtx = getChildContext(ctxNode, child);
276 if (child instanceof ContainerNode container) {
277 appendContainer(builder, container, childCtx, trim);
278 } else if (child instanceof MapNode map) {
279 appendMap(builder, map, childCtx, trim);
280 } else if (child instanceof LeafNode<?> leaf) {
281 appendLeaf(builder, leaf, childCtx, trim, List.of());
286 private static @NonNull DataSchemaContext getChildContext(final DataSchemaContext ctxNode,
287 final NormalizedNode child) {
288 final var childId = child.name();
289 final var childCtx = ctxNode instanceof DataSchemaContext.Composite composite ? composite.childByArg(childId)
291 if (childCtx == null) {
292 throw new NoSuchElementException("Cannot resolve child " + childId + " in " + ctxNode);
298 * If is set specific {@link LogicalDatastoreType} in {@link RestconfStrategy}, then read this type of data from DS.
299 * If don't, we have to read all data from DS (state + config)
301 * @param strategy {@link RestconfStrategy} - object that perform the actual DS operations
302 * @param closeTransactionChain If is set to true, after transaction it will close transactionChain
303 * in {@link RestconfStrategy} if any
304 * @return {@link NormalizedNode}
306 private static @Nullable NormalizedNode readDataViaTransaction(final @NonNull RestconfStrategy strategy,
307 final LogicalDatastoreType store, final YangInstanceIdentifier path) {
308 return TransactionUtil.syncAccess(strategy.read(store, path), path).orElse(null);
312 * Read specific type of data {@link LogicalDatastoreType} via transaction in {@link RestconfStrategy} with
313 * specified subtrees that should only be read.
315 * @param strategy {@link RestconfStrategy} - object that perform the actual DS operations
316 * @param store datastore type
317 * @param path parent path to selected fields
318 * @param closeTransactionChain if it is set to {@code true}, after transaction it will close transactionChain
319 * in {@link RestconfStrategy} if any
320 * @param fields paths to selected subtrees which should be read, relative to to the parent path
321 * @return {@link NormalizedNode}
323 private static @Nullable NormalizedNode readDataViaTransaction(final @NonNull RestconfStrategy strategy,
324 final @NonNull LogicalDatastoreType store, final @NonNull YangInstanceIdentifier path,
325 final @NonNull List<YangInstanceIdentifier> fields) {
326 return TransactionUtil.syncAccess(strategy.read(store, path, fields), path).orElse(null);
329 private static NormalizedNode mergeConfigAndSTateDataIfNeeded(final NormalizedNode stateDataNode,
330 final NormalizedNode configDataNode) {
332 if (stateDataNode == null && configDataNode == null) {
336 // return config data
337 if (stateDataNode == null) {
338 return configDataNode;
342 if (configDataNode == null) {
343 return stateDataNode;
346 // merge data from config and state
347 return mergeStateAndConfigData(stateDataNode, configDataNode);
351 * Merge state and config data into a single NormalizedNode.
353 * @param stateDataNode data node of state data
354 * @param configDataNode data node of config data
355 * @return {@link NormalizedNode}
357 private static @NonNull NormalizedNode mergeStateAndConfigData(
358 final @NonNull NormalizedNode stateDataNode, final @NonNull NormalizedNode configDataNode) {
359 validateNodeMerge(stateDataNode, configDataNode);
360 // FIXME: this check is bogus, as it confuses yang.data.api (NormalizedNode) with yang.model.api (RpcDefinition)
361 if (configDataNode instanceof RpcDefinition) {
362 return prepareRpcData(configDataNode, stateDataNode);
364 return prepareData(configDataNode, stateDataNode);
369 * Validates whether the two NormalizedNodes can be merged.
371 * @param stateDataNode data node of state data
372 * @param configDataNode data node of config data
374 private static void validateNodeMerge(final @NonNull NormalizedNode stateDataNode,
375 final @NonNull NormalizedNode configDataNode) {
376 final QNameModule moduleOfStateData = stateDataNode.name().getNodeType().getModule();
377 final QNameModule moduleOfConfigData = configDataNode.name().getNodeType().getModule();
378 if (!moduleOfStateData.equals(moduleOfConfigData)) {
379 throw new RestconfDocumentedException("Unable to merge data from different modules.");
384 * Prepare and map data for rpc.
386 * @param configDataNode data node of config data
387 * @param stateDataNode data node of state data
388 * @return {@link NormalizedNode}
390 private static @NonNull NormalizedNode prepareRpcData(final @NonNull NormalizedNode configDataNode,
391 final @NonNull NormalizedNode stateDataNode) {
392 final var mapEntryBuilder = Builders.mapEntryBuilder()
393 .withNodeIdentifier((NodeIdentifierWithPredicates) configDataNode.name());
396 mapRpcDataNode(configDataNode, mapEntryBuilder);
398 mapRpcDataNode(stateDataNode, mapEntryBuilder);
400 return Builders.mapBuilder()
401 .withNodeIdentifier(NodeIdentifier.create(configDataNode.name().getNodeType()))
402 .addChild(mapEntryBuilder.build())
407 * Map node to map entry builder.
409 * @param dataNode data node
410 * @param mapEntryBuilder builder for mapping data
412 private static void mapRpcDataNode(final @NonNull NormalizedNode dataNode,
413 final @NonNull DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder) {
414 ((ContainerNode) dataNode).body().forEach(mapEntryBuilder::addChild);
418 * Prepare and map all data from DS.
420 * @param configDataNode data node of config data
421 * @param stateDataNode data node of state data
422 * @return {@link NormalizedNode}
424 @SuppressWarnings("unchecked")
425 private static @NonNull NormalizedNode prepareData(final @NonNull NormalizedNode configDataNode,
426 final @NonNull NormalizedNode stateDataNode) {
427 if (configDataNode instanceof UserMapNode configMap) {
428 final var builder = Builders.orderedMapBuilder().withNodeIdentifier(configMap.name());
429 mapValueToBuilder(configMap.body(), ((UserMapNode) stateDataNode).body(), builder);
430 return builder.build();
431 } else if (configDataNode instanceof SystemMapNode configMap) {
432 final var builder = Builders.mapBuilder().withNodeIdentifier(configMap.name());
433 mapValueToBuilder(configMap.body(), ((SystemMapNode) stateDataNode).body(), builder);
434 return builder.build();
435 } else if (configDataNode instanceof MapEntryNode configEntry) {
436 final var builder = Builders.mapEntryBuilder().withNodeIdentifier(configEntry.name());
437 mapValueToBuilder(configEntry.body(), ((MapEntryNode) stateDataNode).body(), builder);
438 return builder.build();
439 } else if (configDataNode instanceof ContainerNode configContaienr) {
440 final var builder = Builders.containerBuilder().withNodeIdentifier(configContaienr.name());
441 mapValueToBuilder(configContaienr.body(), ((ContainerNode) stateDataNode).body(), builder);
442 return builder.build();
443 } else if (configDataNode instanceof ChoiceNode configChoice) {
444 final var builder = Builders.choiceBuilder().withNodeIdentifier(configChoice.name());
445 mapValueToBuilder(configChoice.body(), ((ChoiceNode) stateDataNode).body(), builder);
446 return builder.build();
447 } else if (configDataNode instanceof LeafNode configLeaf) {
448 // config trumps oper
450 } else if (configDataNode instanceof UserLeafSetNode) {
451 final var configLeafSet = (UserLeafSetNode<Object>) configDataNode;
452 final var builder = Builders.<Object>orderedLeafSetBuilder().withNodeIdentifier(configLeafSet.name());
453 mapValueToBuilder(configLeafSet.body(), ((UserLeafSetNode<Object>) stateDataNode).body(), builder);
454 return builder.build();
455 } else if (configDataNode instanceof SystemLeafSetNode) {
456 final var configLeafSet = (SystemLeafSetNode<Object>) configDataNode;
457 final var builder = Builders.<Object>leafSetBuilder().withNodeIdentifier(configLeafSet.name());
458 mapValueToBuilder(configLeafSet.body(), ((SystemLeafSetNode<Object>) stateDataNode).body(), builder);
459 return builder.build();
460 } else if (configDataNode instanceof LeafSetEntryNode<?> configEntry) {
461 // config trumps oper
463 } else if (configDataNode instanceof UnkeyedListNode configList) {
464 final var builder = Builders.unkeyedListBuilder().withNodeIdentifier(configList.name());
465 mapValueToBuilder(configList.body(), ((UnkeyedListNode) stateDataNode).body(), builder);
466 return builder.build();
467 } else if (configDataNode instanceof UnkeyedListEntryNode configEntry) {
468 final var builder = Builders.unkeyedListEntryBuilder().withNodeIdentifier(configEntry.name());
469 mapValueToBuilder(configEntry.body(), ((UnkeyedListEntryNode) stateDataNode).body(), builder);
470 return builder.build();
472 throw new RestconfDocumentedException("Unexpected node type: " + configDataNode.getClass().getName());
477 * Map value from container node to builder.
479 * @param configData collection of config data nodes
480 * @param stateData collection of state data nodes
481 * @param builder builder
483 private static <T extends NormalizedNode> void mapValueToBuilder(
484 final @NonNull Collection<T> configData, final @NonNull Collection<T> stateData,
485 final @NonNull NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
486 final var configMap = configData.stream().collect(Collectors.toMap(NormalizedNode::name, Function.identity()));
487 final var stateMap = stateData.stream().collect(Collectors.toMap(NormalizedNode::name, Function.identity()));
489 // merge config and state data of children with different identifiers
490 mapDataToBuilder(configMap, stateMap, builder);
492 // merge config and state data of children with the same identifiers
493 mergeDataToBuilder(configMap, stateMap, builder);
497 * Map data with different identifiers to builder. Data with different identifiers can be just added
498 * as childs to parent node.
500 * @param configMap map of config data nodes
501 * @param stateMap map of state data nodes
502 * @param builder - builder
504 private static <T extends NormalizedNode> void mapDataToBuilder(
505 final @NonNull Map<PathArgument, T> configMap, final @NonNull Map<PathArgument, T> stateMap,
506 final @NonNull NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
507 configMap.entrySet().stream().filter(x -> !stateMap.containsKey(x.getKey())).forEach(
508 y -> builder.addChild(y.getValue()));
509 stateMap.entrySet().stream().filter(x -> !configMap.containsKey(x.getKey())).forEach(
510 y -> builder.addChild(y.getValue()));
514 * Map data with the same identifiers to builder. Data with the same identifiers cannot be just added but we need to
515 * go one level down with {@code prepareData} method.
517 * @param configMap immutable config data
518 * @param stateMap immutable state data
519 * @param builder - builder
521 @SuppressWarnings("unchecked")
522 private static <T extends NormalizedNode> void mergeDataToBuilder(
523 final @NonNull Map<PathArgument, T> configMap, final @NonNull Map<PathArgument, T> stateMap,
524 final @NonNull NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
525 // it is enough to process only config data because operational contains the same data
526 configMap.entrySet().stream().filter(x -> stateMap.containsKey(x.getKey())).forEach(
527 y -> builder.addChild((T) prepareData(y.getValue(), stateMap.get(y.getKey()))));