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.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.netconf.with.defaults.rev110601.WithDefaultsMode;
25 import org.opendaylight.yangtools.yang.common.QName;
26 import org.opendaylight.yangtools.yang.common.QNameModule;
27 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
28 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
31 import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
32 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
33 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
34 import org.opendaylight.yangtools.yang.data.api.schema.LeafNode;
35 import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
36 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
37 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
38 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
39 import org.opendaylight.yangtools.yang.data.api.schema.SystemLeafSetNode;
40 import org.opendaylight.yangtools.yang.data.api.schema.SystemMapNode;
41 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
42 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
43 import org.opendaylight.yangtools.yang.data.api.schema.UserLeafSetNode;
44 import org.opendaylight.yangtools.yang.data.api.schema.UserMapNode;
45 import org.opendaylight.yangtools.yang.data.api.schema.builder.CollectionNodeBuilder;
46 import org.opendaylight.yangtools.yang.data.api.schema.builder.DataContainerNodeBuilder;
47 import org.opendaylight.yangtools.yang.data.api.schema.builder.NormalizedNodeContainerBuilder;
48 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
49 import org.opendaylight.yangtools.yang.data.util.DataSchemaContext;
50 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextTree;
51 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
52 import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
53 import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
54 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
55 import org.slf4j.Logger;
56 import org.slf4j.LoggerFactory;
59 * Util class for read data from data store via transaction.
63 * <li>all (config + state)
66 public final class ReadDataTransactionUtil {
67 private static final Logger LOG = LoggerFactory.getLogger(ReadDataTransactionUtil.class);
69 private ReadDataTransactionUtil() {
74 * Read specific type of data from data store via transaction. Close {@link DOMTransactionChain} if any
75 * inside of object {@link RestconfStrategy} provided as a parameter.
77 * @param content type of data to read (config, state, all)
78 * @param path the path to read
79 * @param strategy {@link RestconfStrategy} - object that perform the actual DS operations
80 * @param defaultsMode value of with-defaults parameter
81 * @param ctx schema context
82 * @return {@link NormalizedNode}
84 public static @Nullable NormalizedNode readData(final @NonNull ContentParam content,
85 final @NonNull YangInstanceIdentifier path, final @NonNull RestconfStrategy strategy,
86 final WithDefaultsParam defaultsMode, final EffectiveModelContext ctx) {
87 return switch (content) {
89 // PREPARE STATE DATA NODE
90 final var stateDataNode = readDataViaTransaction(strategy, LogicalDatastoreType.OPERATIONAL, path);
91 // PREPARE CONFIG DATA NODE
92 final var configDataNode = readDataViaTransaction(strategy, LogicalDatastoreType.CONFIGURATION, path);
94 yield mergeConfigAndSTateDataIfNeeded(stateDataNode, defaultsMode == null ? configDataNode
95 : prepareDataByParamWithDef(configDataNode, path, defaultsMode.mode(), ctx));
98 final var read = readDataViaTransaction(strategy, LogicalDatastoreType.CONFIGURATION, path);
99 yield defaultsMode == null ? read : prepareDataByParamWithDef(read, path, defaultsMode.mode(), ctx);
101 case NONCONFIG -> readDataViaTransaction(strategy, LogicalDatastoreType.OPERATIONAL, path);
106 * Read specific type of data from data store via transaction with specified subtrees that should only be read.
107 * Close {@link DOMTransactionChain} inside of object {@link RestconfStrategy} provided as a parameter.
109 * @param content type of data to read (config, state, all)
110 * @param path the parent path to read
111 * @param strategy {@link RestconfStrategy} - object that perform the actual DS operations
112 * @param withDefa value of with-defaults parameter
113 * @param ctx schema context
114 * @param fields paths to selected subtrees which should be read, relative to to the parent path
115 * @return {@link NormalizedNode}
117 public static @Nullable NormalizedNode readData(final @NonNull ContentParam content,
118 final @NonNull YangInstanceIdentifier path, final @NonNull RestconfStrategy strategy,
119 final @Nullable WithDefaultsParam withDefa, @NonNull final EffectiveModelContext ctx,
120 final @NonNull List<YangInstanceIdentifier> fields) {
121 return switch (content) {
123 // PREPARE STATE DATA NODE
124 final var stateDataNode = readDataViaTransaction(strategy, LogicalDatastoreType.OPERATIONAL, path,
126 // PREPARE CONFIG DATA NODE
127 final var configDataNode = readDataViaTransaction(strategy, LogicalDatastoreType.CONFIGURATION, path,
130 yield mergeConfigAndSTateDataIfNeeded(stateDataNode, withDefa == null ? configDataNode
131 : prepareDataByParamWithDef(configDataNode, path, withDefa.mode(), ctx));
134 final var read = readDataViaTransaction(strategy, LogicalDatastoreType.CONFIGURATION, path, fields);
135 yield withDefa == null ? read : prepareDataByParamWithDef(read, path, withDefa.mode(), ctx);
137 case NONCONFIG -> readDataViaTransaction(strategy, LogicalDatastoreType.OPERATIONAL, path, fields);
141 private static NormalizedNode prepareDataByParamWithDef(final NormalizedNode readData,
142 final YangInstanceIdentifier path, final WithDefaultsMode defaultsMode, final EffectiveModelContext ctx) {
143 final boolean trim = switch (defaultsMode) {
145 case Explicit -> false;
146 case ReportAll, ReportAllTagged -> throw new RestconfDocumentedException(
147 "Unsupported with-defaults value " + defaultsMode.getName());
150 final var ctxNode = DataSchemaContextTree.from(ctx).findChild(path).orElseThrow();
151 if (readData instanceof ContainerNode container) {
152 final var builder = Builders.containerBuilder().withNodeIdentifier(container.name());
153 buildCont(builder, container.body(), ctxNode, trim);
154 return builder.build();
155 } else if (readData instanceof MapEntryNode mapEntry) {
156 if (!(ctxNode.dataSchemaNode() instanceof ListSchemaNode listSchema)) {
157 throw new IllegalStateException("Input " + mapEntry + " does not match " + ctxNode);
160 final var builder = Builders.mapEntryBuilder().withNodeIdentifier(mapEntry.name());
161 buildMapEntryBuilder(builder, mapEntry.body(), ctxNode, trim, listSchema.getKeyDefinition());
162 return builder.build();
164 throw new IllegalStateException("Unhandled data contract " + readData.contract());
168 private static void buildMapEntryBuilder(
169 final DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> builder,
170 final Collection<@NonNull DataContainerChild> children, final DataSchemaContext ctxNode,
171 final boolean trim, final List<QName> keys) {
172 for (var child : children) {
173 final var childCtx = getChildContext(ctxNode, child);
175 if (child instanceof ContainerNode container) {
176 appendContainer(builder, container, childCtx, trim);
177 } else if (child instanceof MapNode map) {
178 appendMap(builder, map, childCtx, trim);
179 } else if (child instanceof LeafNode<?> leaf) {
180 appendLeaf(builder, leaf, childCtx, trim, keys);
182 // FIXME: we should never hit this, throw an ISE if this ever happens
183 LOG.debug("Ignoring unhandled child contract {}", child.contract());
188 private static void appendContainer(final DataContainerNodeBuilder<?, ?> builder, final ContainerNode container,
189 final DataSchemaContext ctxNode, final boolean trim) {
190 final var childBuilder = Builders.containerBuilder().withNodeIdentifier(container.name());
191 buildCont(childBuilder, container.body(), ctxNode, trim);
192 builder.withChild(childBuilder.build());
195 private static void appendLeaf(final DataContainerNodeBuilder<?, ?> builder, final LeafNode<?> leaf,
196 final DataSchemaContext ctxNode, final boolean trim, final List<QName> keys) {
197 if (!(ctxNode.dataSchemaNode() instanceof LeafSchemaNode leafSchema)) {
198 throw new IllegalStateException("Input " + leaf + " does not match " + ctxNode);
201 // FIXME: Document now this works with the likes of YangInstanceIdentifier. I bet it does not.
202 final var defaultVal = leafSchema.getType().getDefaultValue().orElse(null);
204 // This is a combined check for when we need to emit the leaf.
206 // We always have to emit key leaf values
207 keys.contains(leafSchema.getQName())
208 // trim == WithDefaultsParam.TRIM and the source is assumed to store explicit values:
210 // When data is retrieved with a <with-defaults> parameter equal to
211 // 'trim', data nodes MUST NOT be reported if they contain the schema
212 // default value. Non-configuration data nodes containing the schema
213 // default value MUST NOT be reported.
215 || trim && (defaultVal == null || !defaultVal.equals(leaf.body()))
216 // !trim == WithDefaultsParam.EXPLICIT and the source is assume to store explicit values... but I fail to
217 // grasp what we are doing here... emit only if it matches default ???!!!
218 // FIXME: The WithDefaultsParam.EXPLICIT says:
220 // Data nodes set to the YANG default by the client are reported.
222 // and RFC8040 (https://www.rfc-editor.org/rfc/rfc8040#page-60) says:
224 // If the "with-defaults" parameter is set to "explicit", then the
225 // server MUST adhere to the default-reporting behavior defined in
226 // Section 3.3 of [RFC6243].
228 // and then RFC6243 (https://www.rfc-editor.org/rfc/rfc6243#section-3.3) says:
230 // When data is retrieved with a <with-defaults> parameter equal to
231 // 'explicit', a data node that was set by a client to its schema
232 // default value MUST be reported. A conceptual data node that would be
233 // set by the server to the schema default value MUST NOT be reported.
234 // Non-configuration data nodes containing the schema default value MUST
237 // (rovarga): The source reports explicitly-defined leaves and does *not* create defaults by itself.
238 // This seems to disregard the 'trim = true' case semantics (see above).
239 // Combining the above, though, these checks are missing the 'non-config' check, which would
240 // distinguish, but barring that this check is superfluous and results in the wrong semantics.
241 // Without that input, this really should be covered by the previous case.
242 || !trim && defaultVal != null && defaultVal.equals(leaf.body())) {
243 builder.withChild(leaf);
247 private static void appendMap(final DataContainerNodeBuilder<?, ?> builder, final MapNode map,
248 final DataSchemaContext childCtx, final boolean trim) {
249 if (!(childCtx.dataSchemaNode() instanceof ListSchemaNode listSchema)) {
250 throw new IllegalStateException("Input " + map + " does not match " + childCtx);
253 final var childBuilder = switch (map.ordering()) {
254 case SYSTEM -> Builders.mapBuilder();
255 case USER -> Builders.orderedMapBuilder();
257 buildList(childBuilder.withNodeIdentifier(map.name()), map.body(), childCtx, trim,
258 listSchema.getKeyDefinition());
259 builder.withChild(childBuilder.build());
262 private static void buildList(final CollectionNodeBuilder<MapEntryNode, ? extends MapNode> builder,
263 final Collection<@NonNull MapEntryNode> entries, final DataSchemaContext ctxNode, final boolean trim,
264 final List<@NonNull QName> keys) {
265 for (var entry : entries) {
266 final var childCtx = getChildContext(ctxNode, entry);
267 final var mapEntryBuilder = Builders.mapEntryBuilder().withNodeIdentifier(entry.name());
268 buildMapEntryBuilder(mapEntryBuilder, entry.body(), childCtx, trim, keys);
269 builder.withChild(mapEntryBuilder.build());
273 private static void buildCont(final DataContainerNodeBuilder<NodeIdentifier, ContainerNode> builder,
274 final Collection<DataContainerChild> children, final DataSchemaContext ctxNode, final boolean trim) {
275 for (var child : children) {
276 final var childCtx = getChildContext(ctxNode, child);
277 if (child instanceof ContainerNode container) {
278 appendContainer(builder, container, childCtx, trim);
279 } else if (child instanceof MapNode map) {
280 appendMap(builder, map, childCtx, trim);
281 } else if (child instanceof LeafNode<?> leaf) {
282 appendLeaf(builder, leaf, childCtx, trim, List.of());
287 private static @NonNull DataSchemaContext getChildContext(final DataSchemaContext ctxNode,
288 final NormalizedNode child) {
289 final var childId = child.name();
290 final var childCtx = ctxNode instanceof DataSchemaContext.Composite composite ? composite.childByArg(childId)
292 if (childCtx == null) {
293 throw new NoSuchElementException("Cannot resolve child " + childId + " in " + ctxNode);
299 * If is set specific {@link LogicalDatastoreType} in {@link RestconfStrategy}, then read this type of data from DS.
300 * If don't, we have to read all data from DS (state + config)
302 * @param strategy {@link RestconfStrategy} - object that perform the actual DS operations
303 * @param closeTransactionChain If is set to true, after transaction it will close transactionChain
304 * in {@link RestconfStrategy} if any
305 * @return {@link NormalizedNode}
307 private static @Nullable NormalizedNode readDataViaTransaction(final @NonNull RestconfStrategy strategy,
308 final LogicalDatastoreType store, final YangInstanceIdentifier path) {
309 return TransactionUtil.syncAccess(strategy.read(store, path), path).orElse(null);
313 * Read specific type of data {@link LogicalDatastoreType} via transaction in {@link RestconfStrategy} with
314 * specified subtrees that should only be read.
316 * @param strategy {@link RestconfStrategy} - object that perform the actual DS operations
317 * @param store datastore type
318 * @param path parent path to selected fields
319 * @param closeTransactionChain if it is set to {@code true}, after transaction it will close transactionChain
320 * in {@link RestconfStrategy} if any
321 * @param fields paths to selected subtrees which should be read, relative to to the parent path
322 * @return {@link NormalizedNode}
324 private static @Nullable NormalizedNode readDataViaTransaction(final @NonNull RestconfStrategy strategy,
325 final @NonNull LogicalDatastoreType store, final @NonNull YangInstanceIdentifier path,
326 final @NonNull List<YangInstanceIdentifier> fields) {
327 return TransactionUtil.syncAccess(strategy.read(store, path, fields), path).orElse(null);
330 private static NormalizedNode mergeConfigAndSTateDataIfNeeded(final NormalizedNode stateDataNode,
331 final NormalizedNode configDataNode) {
333 if (stateDataNode == null && configDataNode == null) {
337 // return config data
338 if (stateDataNode == null) {
339 return configDataNode;
343 if (configDataNode == null) {
344 return stateDataNode;
347 // merge data from config and state
348 return mergeStateAndConfigData(stateDataNode, configDataNode);
352 * Merge state and config data into a single NormalizedNode.
354 * @param stateDataNode data node of state data
355 * @param configDataNode data node of config data
356 * @return {@link NormalizedNode}
358 private static @NonNull NormalizedNode mergeStateAndConfigData(
359 final @NonNull NormalizedNode stateDataNode, final @NonNull NormalizedNode configDataNode) {
360 validateNodeMerge(stateDataNode, configDataNode);
361 // FIXME: this check is bogus, as it confuses yang.data.api (NormalizedNode) with yang.model.api (RpcDefinition)
362 if (configDataNode instanceof RpcDefinition) {
363 return prepareRpcData(configDataNode, stateDataNode);
365 return prepareData(configDataNode, stateDataNode);
370 * Validates whether the two NormalizedNodes can be merged.
372 * @param stateDataNode data node of state data
373 * @param configDataNode data node of config data
375 private static void validateNodeMerge(final @NonNull NormalizedNode stateDataNode,
376 final @NonNull NormalizedNode configDataNode) {
377 final QNameModule moduleOfStateData = stateDataNode.name().getNodeType().getModule();
378 final QNameModule moduleOfConfigData = configDataNode.name().getNodeType().getModule();
379 if (!moduleOfStateData.equals(moduleOfConfigData)) {
380 throw new RestconfDocumentedException("Unable to merge data from different modules.");
385 * Prepare and map data for rpc.
387 * @param configDataNode data node of config data
388 * @param stateDataNode data node of state data
389 * @return {@link NormalizedNode}
391 private static @NonNull NormalizedNode prepareRpcData(final @NonNull NormalizedNode configDataNode,
392 final @NonNull NormalizedNode stateDataNode) {
393 final var mapEntryBuilder = Builders.mapEntryBuilder()
394 .withNodeIdentifier((NodeIdentifierWithPredicates) configDataNode.name());
397 mapRpcDataNode(configDataNode, mapEntryBuilder);
399 mapRpcDataNode(stateDataNode, mapEntryBuilder);
401 return Builders.mapBuilder()
402 .withNodeIdentifier(NodeIdentifier.create(configDataNode.name().getNodeType()))
403 .addChild(mapEntryBuilder.build())
408 * Map node to map entry builder.
410 * @param dataNode data node
411 * @param mapEntryBuilder builder for mapping data
413 private static void mapRpcDataNode(final @NonNull NormalizedNode dataNode,
414 final @NonNull DataContainerNodeBuilder<NodeIdentifierWithPredicates, MapEntryNode> mapEntryBuilder) {
415 ((ContainerNode) dataNode).body().forEach(mapEntryBuilder::addChild);
419 * Prepare and map all data from DS.
421 * @param configDataNode data node of config data
422 * @param stateDataNode data node of state data
423 * @return {@link NormalizedNode}
425 @SuppressWarnings("unchecked")
426 private static @NonNull NormalizedNode prepareData(final @NonNull NormalizedNode configDataNode,
427 final @NonNull NormalizedNode stateDataNode) {
428 if (configDataNode instanceof UserMapNode configMap) {
429 final var builder = Builders.orderedMapBuilder().withNodeIdentifier(configMap.name());
430 mapValueToBuilder(configMap.body(), ((UserMapNode) stateDataNode).body(), builder);
431 return builder.build();
432 } else if (configDataNode instanceof SystemMapNode configMap) {
433 final var builder = Builders.mapBuilder().withNodeIdentifier(configMap.name());
434 mapValueToBuilder(configMap.body(), ((SystemMapNode) stateDataNode).body(), builder);
435 return builder.build();
436 } else if (configDataNode instanceof MapEntryNode configEntry) {
437 final var builder = Builders.mapEntryBuilder().withNodeIdentifier(configEntry.name());
438 mapValueToBuilder(configEntry.body(), ((MapEntryNode) stateDataNode).body(), builder);
439 return builder.build();
440 } else if (configDataNode instanceof ContainerNode configContaienr) {
441 final var builder = Builders.containerBuilder().withNodeIdentifier(configContaienr.name());
442 mapValueToBuilder(configContaienr.body(), ((ContainerNode) stateDataNode).body(), builder);
443 return builder.build();
444 } else if (configDataNode instanceof ChoiceNode configChoice) {
445 final var builder = Builders.choiceBuilder().withNodeIdentifier(configChoice.name());
446 mapValueToBuilder(configChoice.body(), ((ChoiceNode) stateDataNode).body(), builder);
447 return builder.build();
448 } else if (configDataNode instanceof LeafNode configLeaf) {
449 // config trumps oper
451 } else if (configDataNode instanceof UserLeafSetNode) {
452 final var configLeafSet = (UserLeafSetNode<Object>) configDataNode;
453 final var builder = Builders.<Object>orderedLeafSetBuilder().withNodeIdentifier(configLeafSet.name());
454 mapValueToBuilder(configLeafSet.body(), ((UserLeafSetNode<Object>) stateDataNode).body(), builder);
455 return builder.build();
456 } else if (configDataNode instanceof SystemLeafSetNode) {
457 final var configLeafSet = (SystemLeafSetNode<Object>) configDataNode;
458 final var builder = Builders.<Object>leafSetBuilder().withNodeIdentifier(configLeafSet.name());
459 mapValueToBuilder(configLeafSet.body(), ((SystemLeafSetNode<Object>) stateDataNode).body(), builder);
460 return builder.build();
461 } else if (configDataNode instanceof LeafSetEntryNode<?> configEntry) {
462 // config trumps oper
464 } else if (configDataNode instanceof UnkeyedListNode configList) {
465 final var builder = Builders.unkeyedListBuilder().withNodeIdentifier(configList.name());
466 mapValueToBuilder(configList.body(), ((UnkeyedListNode) stateDataNode).body(), builder);
467 return builder.build();
468 } else if (configDataNode instanceof UnkeyedListEntryNode configEntry) {
469 final var builder = Builders.unkeyedListEntryBuilder().withNodeIdentifier(configEntry.name());
470 mapValueToBuilder(configEntry.body(), ((UnkeyedListEntryNode) stateDataNode).body(), builder);
471 return builder.build();
473 throw new RestconfDocumentedException("Unexpected node type: " + configDataNode.getClass().getName());
478 * Map value from container node to builder.
480 * @param configData collection of config data nodes
481 * @param stateData collection of state data nodes
482 * @param builder builder
484 private static <T extends NormalizedNode> void mapValueToBuilder(
485 final @NonNull Collection<T> configData, final @NonNull Collection<T> stateData,
486 final @NonNull NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
487 final var configMap = configData.stream().collect(Collectors.toMap(NormalizedNode::name, Function.identity()));
488 final var stateMap = stateData.stream().collect(Collectors.toMap(NormalizedNode::name, Function.identity()));
490 // merge config and state data of children with different identifiers
491 mapDataToBuilder(configMap, stateMap, builder);
493 // merge config and state data of children with the same identifiers
494 mergeDataToBuilder(configMap, stateMap, builder);
498 * Map data with different identifiers to builder. Data with different identifiers can be just added
499 * as childs to parent node.
501 * @param configMap map of config data nodes
502 * @param stateMap map of state data nodes
503 * @param builder - builder
505 private static <T extends NormalizedNode> void mapDataToBuilder(
506 final @NonNull Map<PathArgument, T> configMap, final @NonNull Map<PathArgument, T> stateMap,
507 final @NonNull NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
508 configMap.entrySet().stream().filter(x -> !stateMap.containsKey(x.getKey())).forEach(
509 y -> builder.addChild(y.getValue()));
510 stateMap.entrySet().stream().filter(x -> !configMap.containsKey(x.getKey())).forEach(
511 y -> builder.addChild(y.getValue()));
515 * Map data with the same identifiers to builder. Data with the same identifiers cannot be just added but we need to
516 * go one level down with {@code prepareData} method.
518 * @param configMap immutable config data
519 * @param stateMap immutable state data
520 * @param builder - builder
522 @SuppressWarnings("unchecked")
523 private static <T extends NormalizedNode> void mergeDataToBuilder(
524 final @NonNull Map<PathArgument, T> configMap, final @NonNull Map<PathArgument, T> stateMap,
525 final @NonNull NormalizedNodeContainerBuilder<?, PathArgument, T, ?> builder) {
526 // it is enough to process only config data because operational contains the same data
527 configMap.entrySet().stream().filter(x -> stateMap.containsKey(x.getKey())).forEach(
528 y -> builder.addChild((T) prepareData(y.getValue(), stateMap.get(y.getKey()))));