cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java

   1 /*
   2  *  ============LICENSE_START=======================================================
   3  *  Copyright (C) 2021-2022 Nordix Foundation
   4  *  Modifications Copyright (C) 2021 Pantheon.tech
   5  *  Modifications Copyright (C) 2020-2022 Bell Canada.
   6  *  Modifications Copyright (C) 2022 TechMahindra Ltd.
   7  *  ================================================================================
   8  *  Licensed under the Apache License, Version 2.0 (the "License");
   9  *  you may not use this file except in compliance with the License.
  10  *  You may obtain a copy of the License at
  11  *
  12  *        http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  *  Unless required by applicable law or agreed to in writing, software
  15  *  distributed under the License is distributed on an "AS IS" BASIS,
  16  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  *  See the License for the specific language governing permissions and
  18  *  limitations under the License.
  19  *
  20  *  SPDX-License-Identifier: Apache-2.0
  21  *  ============LICENSE_END=========================================================
  22  */
  23
  24 package org.onap.cps.spi.impl;
  25
  26 import com.google.common.collect.ImmutableSet;
  27 import com.google.common.collect.ImmutableSet.Builder;
  28 import java.io.Serializable;
  29 import java.util.ArrayList;
  30 import java.util.Collection;
  31 import java.util.Collections;
  32 import java.util.HashMap;
  33 import java.util.HashSet;
  34 import java.util.List;
  35 import java.util.Map;
  36 import java.util.Set;
  37 import java.util.regex.Matcher;
  38 import java.util.regex.Pattern;
  39 import java.util.stream.Collectors;
  40 import javax.transaction.Transactional;
  41 import lombok.RequiredArgsConstructor;
  42 import lombok.extern.slf4j.Slf4j;
  43 import org.hibernate.StaleStateException;
  44 import org.onap.cps.cpspath.parser.CpsPathQuery;
  45 import org.onap.cps.cpspath.parser.CpsPathUtil;
  46 import org.onap.cps.cpspath.parser.PathParsingException;
  47 import org.onap.cps.spi.CpsDataPersistenceService;
  48 import org.onap.cps.spi.FetchDescendantsOption;
  49 import org.onap.cps.spi.entities.AnchorEntity;
  50 import org.onap.cps.spi.entities.DataspaceEntity;
  51 import org.onap.cps.spi.entities.FragmentEntity;
  52 import org.onap.cps.spi.entities.FragmentEntityArranger;
  53 import org.onap.cps.spi.entities.FragmentExtract;
  54 import org.onap.cps.spi.exceptions.AlreadyDefinedException;
  55 import org.onap.cps.spi.exceptions.AlreadyDefinedExceptionBatch;
  56 import org.onap.cps.spi.exceptions.ConcurrencyException;
  57 import org.onap.cps.spi.exceptions.CpsAdminException;
  58 import org.onap.cps.spi.exceptions.CpsPathException;
  59 import org.onap.cps.spi.exceptions.DataNodeNotFoundException;
  60 import org.onap.cps.spi.model.DataNode;
  61 import org.onap.cps.spi.model.DataNodeBuilder;
  62 import org.onap.cps.spi.repository.AnchorRepository;
  63 import org.onap.cps.spi.repository.DataspaceRepository;
  64 import org.onap.cps.spi.repository.FragmentRepository;
  65 import org.onap.cps.spi.utils.SessionManager;
  66 import org.onap.cps.utils.JsonObjectMapper;
  67 import org.springframework.dao.DataIntegrityViolationException;
  68 import org.springframework.stereotype.Service;
  69
  70 @Service
  71 @Slf4j
  72 @RequiredArgsConstructor
  73 public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService {
  74
  75     private final DataspaceRepository dataspaceRepository;
  76     private final AnchorRepository anchorRepository;
  77     private final FragmentRepository fragmentRepository;
  78     private final JsonObjectMapper jsonObjectMapper;
  79     private final SessionManager sessionManager;
  80
  81     private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@[\\s\\S]+?]){0,1})";
  82     private static final Pattern REG_EX_PATTERN_FOR_LIST_ELEMENT_KEY_PREDICATE =
  83             Pattern.compile("\\[(\\@([^\\/]{0,9999}))\\]$");
  84     private static final String TOP_LEVEL_MODULE_PREFIX_PROPERTY_NAME = "topLevelModulePrefix";
  85
  86     @Override
  87     public void addChildDataNode(final String dataspaceName, final String anchorName, final String parentNodeXpath,
  88                                  final DataNode newChildDataNode) {
  89         addNewChildDataNode(dataspaceName, anchorName, parentNodeXpath, newChildDataNode);
  90     }
  91
  92     @Override
  93     public void addChildDataNodes(final String dataspaceName, final String anchorName,
  94                                   final String parentNodeXpath, final Collection<DataNode> dataNodes) {
  95         addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, dataNodes);
  96     }
  97
  98     @Override
  99     public void addListElements(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 100                                 final Collection<DataNode> newListElements) {
 101         addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, newListElements);
 102     }
 103
 104     @Override
 105     public void addMultipleLists(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 106                                  final Collection<Collection<DataNode>> newLists) {
 107         final Collection<String> failedXpaths = new HashSet<>();
 108         newLists.forEach(newList -> {
 109             try {
 110                 addChildrenDataNodes(dataspaceName, anchorName, parentNodeXpath, newList);
 111             } catch (final AlreadyDefinedExceptionBatch e) {
 112                 failedXpaths.addAll(e.getAlreadyDefinedXpaths());
 113             }
 114         });
 115
 116         if (!failedXpaths.isEmpty()) {
 117             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 118         }
 119
 120     }
 121
 122     private void addNewChildDataNode(final String dataspaceName, final String anchorName,
 123                                      final String parentNodeXpath, final DataNode newChild) {
 124         final FragmentEntity parentFragmentEntity =
 125             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
 126         final FragmentEntity newChildAsFragmentEntity =
 127                 convertToFragmentWithAllDescendants(parentFragmentEntity.getDataspace(),
 128                         parentFragmentEntity.getAnchor(), newChild);
 129         newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 130         try {
 131             fragmentRepository.save(newChildAsFragmentEntity);
 132         } catch (final DataIntegrityViolationException e) {
 133             throw AlreadyDefinedException.forDataNode(newChild.getXpath(), anchorName, e);
 134         }
 135
 136     }
 137
 138     private void addChildrenDataNodes(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 139                                       final Collection<DataNode> newChildren) {
 140         final FragmentEntity parentFragmentEntity =
 141             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
 142         final List<FragmentEntity> fragmentEntities = new ArrayList<>(newChildren.size());
 143         try {
 144             newChildren.forEach(newChildAsDataNode -> {
 145                 final FragmentEntity newChildAsFragmentEntity =
 146                         convertToFragmentWithAllDescendants(parentFragmentEntity.getDataspace(),
 147                                 parentFragmentEntity.getAnchor(), newChildAsDataNode);
 148                 newChildAsFragmentEntity.setParentId(parentFragmentEntity.getId());
 149                 fragmentEntities.add(newChildAsFragmentEntity);
 150             });
 151             fragmentRepository.saveAll(fragmentEntities);
 152         } catch (final DataIntegrityViolationException e) {
 153             log.warn("Exception occurred : {} , While saving : {} children, retrying using individual save operations",
 154                     e, fragmentEntities.size());
 155             retrySavingEachChildIndividually(dataspaceName, anchorName, parentNodeXpath, newChildren);
 156         }
 157     }
 158
 159     private void retrySavingEachChildIndividually(final String dataspaceName, final String anchorName,
 160                                                   final String parentNodeXpath,
 161                                                   final Collection<DataNode> newChildren) {
 162         final Collection<String> failedXpaths = new HashSet<>();
 163         for (final DataNode newChild : newChildren) {
 164             try {
 165                 addNewChildDataNode(dataspaceName, anchorName, parentNodeXpath, newChild);
 166             } catch (final AlreadyDefinedException e) {
 167                 failedXpaths.add(newChild.getXpath());
 168             }
 169         }
 170         if (!failedXpaths.isEmpty()) {
 171             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 172         }
 173     }
 174
 175     @Override
 176     public void storeDataNode(final String dataspaceName, final String anchorName, final DataNode dataNode) {
 177         storeDataNodes(dataspaceName, anchorName, Collections.singletonList(dataNode));
 178     }
 179
 180     @Override
 181     public void storeDataNodes(final String dataspaceName, final String anchorName,
 182                                final Collection<DataNode> dataNodes) {
 183         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 184         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 185         final List<FragmentEntity> fragmentEntities = new ArrayList<>(dataNodes.size());
 186         try {
 187             for (final DataNode dataNode: dataNodes) {
 188                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
 189                         dataNode);
 190                 fragmentEntities.add(fragmentEntity);
 191             }
 192             fragmentRepository.saveAll(fragmentEntities);
 193         } catch (final DataIntegrityViolationException exception) {
 194             log.warn("Exception occurred : {} , While saving : {} data nodes, Retrying saving data nodes individually",
 195                     exception, dataNodes.size());
 196             storeDataNodesIndividually(dataspaceName, anchorName, dataNodes);
 197         }
 198     }
 199
 200     private void storeDataNodesIndividually(final String dataspaceName, final String anchorName,
 201                                            final Collection<DataNode> dataNodes) {
 202         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 203         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 204         final Collection<String> failedXpaths = new HashSet<>();
 205         for (final DataNode dataNode: dataNodes) {
 206             try {
 207                 final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
 208                         dataNode);
 209                 fragmentRepository.save(fragmentEntity);
 210             } catch (final DataIntegrityViolationException e) {
 211                 failedXpaths.add(dataNode.getXpath());
 212             }
 213         }
 214         if (!failedXpaths.isEmpty()) {
 215             throw new AlreadyDefinedExceptionBatch(failedXpaths);
 216         }
 217     }
 218
 219     /**
 220      * Convert DataNode object into Fragment and places the result in the fragments placeholder. Performs same action
 221      * for all DataNode children recursively.
 222      *
 223      * @param dataspaceEntity       dataspace
 224      * @param anchorEntity          anchorEntity
 225      * @param dataNodeToBeConverted dataNode
 226      * @return a Fragment built from current DataNode
 227      */
 228     private FragmentEntity convertToFragmentWithAllDescendants(final DataspaceEntity dataspaceEntity,
 229                                                                final AnchorEntity anchorEntity,
 230                                                                final DataNode dataNodeToBeConverted) {
 231         final FragmentEntity parentFragment = toFragmentEntity(dataspaceEntity, anchorEntity, dataNodeToBeConverted);
 232         final Builder<FragmentEntity> childFragmentsImmutableSetBuilder = ImmutableSet.builder();
 233         for (final DataNode childDataNode : dataNodeToBeConverted.getChildDataNodes()) {
 234             final FragmentEntity childFragment =
 235                     convertToFragmentWithAllDescendants(parentFragment.getDataspace(), parentFragment.getAnchor(),
 236                             childDataNode);
 237             childFragmentsImmutableSetBuilder.add(childFragment);
 238         }
 239         parentFragment.setChildFragments(childFragmentsImmutableSetBuilder.build());
 240         return parentFragment;
 241     }
 242
 243     private FragmentEntity toFragmentEntity(final DataspaceEntity dataspaceEntity,
 244                                             final AnchorEntity anchorEntity, final DataNode dataNode) {
 245         return FragmentEntity.builder()
 246                 .dataspace(dataspaceEntity)
 247                 .anchor(anchorEntity)
 248                 .xpath(dataNode.getXpath())
 249                 .attributes(jsonObjectMapper.asJsonString(dataNode.getLeaves()))
 250                 .build();
 251     }
 252
 253     @Override
 254     public DataNode getDataNode(final String dataspaceName, final String anchorName, final String xpath,
 255                                 final FetchDescendantsOption fetchDescendantsOption) {
 256         final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, xpath,
 257             fetchDescendantsOption);
 258         return toDataNode(fragmentEntity, fetchDescendantsOption);
 259     }
 260
 261     private FragmentEntity getFragmentWithoutDescendantsByXpath(final String dataspaceName,
 262                                                                 final String anchorName,
 263                                                                 final String xpath) {
 264         return getFragmentByXpath(dataspaceName, anchorName, xpath, FetchDescendantsOption.OMIT_DESCENDANTS);
 265     }
 266
 267     private FragmentEntity getFragmentByXpath(final String dataspaceName, final String anchorName,
 268                                               final String xpath, final FetchDescendantsOption fetchDescendantsOption) {
 269         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 270         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 271         if (isRootXpath(xpath)) {
 272             final List<FragmentExtract> fragmentExtracts = fragmentRepository.getTopLevelFragments(dataspaceEntity,
 273                     anchorEntity);
 274             return FragmentEntityArranger.toFragmentEntityTree(anchorEntity,
 275                     fragmentExtracts);
 276         } else {
 277             final String normalizedXpath = getNormalizedXpath(xpath);
 278             final FragmentEntity fragmentEntity;
 279             if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
 280                 fragmentEntity =
 281                     fragmentRepository.getByDataspaceAndAnchorAndXpath(dataspaceEntity, anchorEntity, normalizedXpath);
 282             } else {
 283                 fragmentEntity = buildFragmentEntityFromFragmentExtracts(anchorEntity, normalizedXpath);
 284             }
 285             if (fragmentEntity == null) {
 286                 throw new DataNodeNotFoundException(dataspaceEntity.getName(), anchorEntity.getName(), xpath);
 287             }
 288             return fragmentEntity;
 289         }
 290     }
 291
 292     private FragmentEntity buildFragmentEntityFromFragmentExtracts(final AnchorEntity anchorEntity,
 293                                                                    final String normalizedXpath) {
 294         final FragmentEntity fragmentEntity;
 295         final List<FragmentExtract> fragmentExtracts =
 296                 fragmentRepository.findByAnchorIdAndParentXpath(anchorEntity.getId(), normalizedXpath);
 297         log.debug("Fetched {} fragment entities by anchor {} and cps path {}.",
 298                 fragmentExtracts.size(), anchorEntity.getName(), normalizedXpath);
 299         fragmentEntity = FragmentEntityArranger.toFragmentEntityTree(anchorEntity, fragmentExtracts);
 300         return fragmentEntity;
 301     }
 302
 303     @Override
 304     public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
 305                                          final FetchDescendantsOption fetchDescendantsOption) {
 306         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 307         final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
 308         final CpsPathQuery cpsPathQuery;
 309         try {
 310             cpsPathQuery = CpsPathUtil.getCpsPathQuery(cpsPath);
 311         } catch (final PathParsingException e) {
 312             throw new CpsPathException(e.getMessage());
 313         }
 314         List<FragmentEntity> fragmentEntities =
 315                 fragmentRepository.findByAnchorAndCpsPath(anchorEntity.getId(), cpsPathQuery);
 316         if (cpsPathQuery.hasAncestorAxis()) {
 317             final Set<String> ancestorXpaths = processAncestorXpath(fragmentEntities, cpsPathQuery);
 318             fragmentEntities = ancestorXpaths.isEmpty() ? Collections.emptyList()
 319                     : fragmentRepository.findAllByAnchorAndXpathIn(anchorEntity, ancestorXpaths);
 320         }
 321         return createDataNodesFromFragmentEntities(fetchDescendantsOption, anchorEntity,
 322                 fragmentEntities);
 323     }
 324
 325     private List<DataNode> createDataNodesFromFragmentEntities(final FetchDescendantsOption fetchDescendantsOption,
 326                                                                final AnchorEntity anchorEntity,
 327                                                                final List<FragmentEntity> fragmentEntities) {
 328         final List<DataNode> dataNodes = new ArrayList<>(fragmentEntities.size());
 329         for (final FragmentEntity proxiedFragmentEntity : fragmentEntities) {
 330             final DataNode dataNode;
 331             if (FetchDescendantsOption.OMIT_DESCENDANTS.equals(fetchDescendantsOption)) {
 332                 dataNode = toDataNode(proxiedFragmentEntity, fetchDescendantsOption);
 333             } else {
 334                 final String normalizedXpath = getNormalizedXpath(proxiedFragmentEntity.getXpath());
 335                 final FragmentEntity unproxiedFragmentEntity = buildFragmentEntityFromFragmentExtracts(anchorEntity,
 336                         normalizedXpath);
 337                 dataNode = toDataNode(unproxiedFragmentEntity, fetchDescendantsOption);
 338             }
 339             dataNodes.add(dataNode);
 340         }
 341         return Collections.unmodifiableList(dataNodes);
 342     }
 343
 344     private static String getNormalizedXpath(final String xpathSource) {
 345         final String normalizedXpath;
 346         try {
 347             normalizedXpath = CpsPathUtil.getNormalizedXpath(xpathSource);
 348         } catch (final PathParsingException e) {
 349             throw new CpsPathException(e.getMessage());
 350         }
 351         return normalizedXpath;
 352     }
 353
 354     @Override
 355     public String startSession() {
 356         return sessionManager.startSession();
 357     }
 358
 359     @Override
 360     public void closeSession(final String sessionId) {
 361         sessionManager.closeSession(sessionId, SessionManager.WITH_COMMIT);
 362     }
 363
 364     @Override
 365     public void lockAnchor(final String sessionId, final String dataspaceName,
 366                            final String anchorName, final Long timeoutInMilliseconds) {
 367         sessionManager.lockAnchor(sessionId, dataspaceName, anchorName, timeoutInMilliseconds);
 368     }
 369
 370     private static Set<String> processAncestorXpath(final List<FragmentEntity> fragmentEntities,
 371                                                     final CpsPathQuery cpsPathQuery) {
 372         final Set<String> ancestorXpath = new HashSet<>();
 373         final Pattern pattern =
 374                 Pattern.compile("([\\s\\S]*\\/" + Pattern.quote(cpsPathQuery.getAncestorSchemaNodeIdentifier())
 375                         + REG_EX_FOR_OPTIONAL_LIST_INDEX + "\\/[\\s\\S]*");
 376         for (final FragmentEntity fragmentEntity : fragmentEntities) {
 377             final Matcher matcher = pattern.matcher(fragmentEntity.getXpath());
 378             if (matcher.matches()) {
 379                 ancestorXpath.add(matcher.group(1));
 380             }
 381         }
 382         return ancestorXpath;
 383     }
 384
 385     private DataNode toDataNode(final FragmentEntity fragmentEntity,
 386                                 final FetchDescendantsOption fetchDescendantsOption) {
 387         final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
 388         Map<String, Serializable> leaves = new HashMap<>();
 389         if (fragmentEntity.getAttributes() != null) {
 390             leaves = jsonObjectMapper.convertJsonString(fragmentEntity.getAttributes(), Map.class);
 391         }
 392         return new DataNodeBuilder()
 393                 .withXpath(fragmentEntity.getXpath())
 394                 .withLeaves(leaves)
 395                 .withChildDataNodes(childDataNodes).build();
 396     }
 397
 398     private List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
 399                                              final FetchDescendantsOption fetchDescendantsOption) {
 400         if (fetchDescendantsOption.hasNext()) {
 401             return fragmentEntity.getChildFragments().stream()
 402                     .map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption.next()))
 403                     .collect(Collectors.toList());
 404         }
 405         return Collections.emptyList();
 406     }
 407
 408     @Override
 409     public void updateDataLeaves(final String dataspaceName, final String anchorName, final String xpath,
 410                                  final Map<String, Serializable> leaves) {
 411         final FragmentEntity fragmentEntity = getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, xpath);
 412         fragmentEntity.setAttributes(jsonObjectMapper.asJsonString(leaves));
 413         fragmentRepository.save(fragmentEntity);
 414     }
 415
 416     @Override
 417     public void updateDataNodeAndDescendants(final String dataspaceName, final String anchorName,
 418                                              final DataNode dataNode) {
 419         final FragmentEntity fragmentEntity =
 420             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, dataNode.getXpath());
 421         updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode);
 422         try {
 423             fragmentRepository.save(fragmentEntity);
 424         } catch (final StaleStateException staleStateException) {
 425             throw new ConcurrencyException("Concurrent Transactions",
 426                     String.format("dataspace :'%s', Anchor : '%s' and xpath: '%s' is updated by another transaction.",
 427                             dataspaceName, anchorName, dataNode.getXpath()));
 428         }
 429     }
 430
 431     @Override
 432     public void updateDataNodesAndDescendants(final String dataspaceName,
 433                                               final String anchorName,
 434                                               final List<DataNode> dataNodes) {
 435
 436         final Map<DataNode, FragmentEntity> dataNodeFragmentEntityMap = dataNodes.stream()
 437                 .collect(Collectors.toMap(
 438                         dataNode -> dataNode,
 439                         dataNode ->
 440                             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, dataNode.getXpath())));
 441         dataNodeFragmentEntityMap.forEach(
 442                 (dataNode, fragmentEntity) -> updateFragmentEntityAndDescendantsWithDataNode(fragmentEntity, dataNode));
 443         try {
 444             fragmentRepository.saveAll(dataNodeFragmentEntityMap.values());
 445         } catch (final StaleStateException staleStateException) {
 446             retryUpdateDataNodesIndividually(dataspaceName, anchorName, dataNodeFragmentEntityMap.values());
 447         }
 448     }
 449
 450     private void retryUpdateDataNodesIndividually(final String dataspaceName, final String anchorName,
 451                                                   final Collection<FragmentEntity> fragmentEntities) {
 452         final Collection<String> failedXpaths = new HashSet<>();
 453
 454         fragmentEntities.forEach(dataNodeFragment -> {
 455             try {
 456                 fragmentRepository.save(dataNodeFragment);
 457             } catch (final StaleStateException e) {
 458                 failedXpaths.add(dataNodeFragment.getXpath());
 459             }
 460         });
 461
 462         if (!failedXpaths.isEmpty()) {
 463             final String failedXpathsConcatenated = String.join(",", failedXpaths);
 464             throw new ConcurrencyException("Concurrent Transactions", String.format(
 465                     "DataNodes : %s in Dataspace :'%s' with Anchor : '%s'  are updated by another transaction.",
 466                     failedXpathsConcatenated, dataspaceName, anchorName));
 467         }
 468     }
 469
 470     private void updateFragmentEntityAndDescendantsWithDataNode(final FragmentEntity existingFragmentEntity,
 471                                                                 final DataNode newDataNode) {
 472
 473         existingFragmentEntity.setAttributes(jsonObjectMapper.asJsonString(newDataNode.getLeaves()));
 474
 475         final Map<String, FragmentEntity> existingChildrenByXpath = existingFragmentEntity.getChildFragments().stream()
 476                 .collect(Collectors.toMap(FragmentEntity::getXpath, childFragmentEntity -> childFragmentEntity));
 477
 478         final Collection<FragmentEntity> updatedChildFragments = new HashSet<>();
 479
 480         for (final DataNode newDataNodeChild : newDataNode.getChildDataNodes()) {
 481             final FragmentEntity childFragment;
 482             if (isNewDataNode(newDataNodeChild, existingChildrenByXpath)) {
 483                 childFragment = convertToFragmentWithAllDescendants(
 484                         existingFragmentEntity.getDataspace(), existingFragmentEntity.getAnchor(), newDataNodeChild);
 485             } else {
 486                 childFragment = existingChildrenByXpath.get(newDataNodeChild.getXpath());
 487                 updateFragmentEntityAndDescendantsWithDataNode(childFragment, newDataNodeChild);
 488             }
 489             updatedChildFragments.add(childFragment);
 490         }
 491
 492         existingFragmentEntity.getChildFragments().clear();
 493         existingFragmentEntity.getChildFragments().addAll(updatedChildFragments);
 494     }
 495
 496     @Override
 497     @Transactional
 498     public void replaceListContent(final String dataspaceName, final String anchorName, final String parentNodeXpath,
 499                                    final Collection<DataNode> newListElements) {
 500         final FragmentEntity parentEntity =
 501             getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
 502         final String listElementXpathPrefix = getListElementXpathPrefix(newListElements);
 503         final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath =
 504                 extractListElementFragmentEntitiesByXPath(parentEntity.getChildFragments(), listElementXpathPrefix);
 505         deleteListElements(parentEntity.getChildFragments(), existingListElementFragmentEntitiesByXPath);
 506         final Set<FragmentEntity> updatedChildFragmentEntities = new HashSet<>();
 507         for (final DataNode newListElement : newListElements) {
 508             final FragmentEntity existingListElementEntity =
 509                     existingListElementFragmentEntitiesByXPath.get(newListElement.getXpath());
 510             final FragmentEntity entityToBeAdded = getFragmentForReplacement(parentEntity, newListElement,
 511                     existingListElementEntity);
 512
 513             updatedChildFragmentEntities.add(entityToBeAdded);
 514         }
 515         parentEntity.getChildFragments().addAll(updatedChildFragmentEntities);
 516         fragmentRepository.save(parentEntity);
 517     }
 518
 519     @Override
 520     @Transactional
 521     public void deleteDataNodes(final String dataspaceName, final String anchorName) {
 522         final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
 523         anchorRepository.findByDataspaceAndName(dataspaceEntity, anchorName)
 524                 .ifPresent(
 525                         anchorEntity -> fragmentRepository.deleteByAnchorIn(Set.of(anchorEntity)));
 526     }
 527
 528     @Override
 529     @Transactional
 530     public void deleteListDataNode(final String dataspaceName, final String anchorName,
 531                                    final String targetXpath) {
 532         deleteDataNode(dataspaceName, anchorName, targetXpath, true);
 533     }
 534
 535     @Override
 536     @Transactional
 537     public void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath) {
 538         deleteDataNode(dataspaceName, anchorName, targetXpath, false);
 539     }
 540
 541     private void deleteDataNode(final String dataspaceName, final String anchorName, final String targetXpath,
 542                                 final boolean onlySupportListNodeDeletion) {
 543         final String parentNodeXpath;
 544         FragmentEntity parentFragmentEntity = null;
 545         boolean targetDeleted;
 546         if (isRootXpath(targetXpath)) {
 547             deleteDataNodes(dataspaceName, anchorName);
 548             targetDeleted = true;
 549         } else {
 550             if (isRootContainerNodeXpath(targetXpath)) {
 551                 parentNodeXpath = targetXpath;
 552             } else {
 553                 parentNodeXpath = targetXpath.substring(0, targetXpath.lastIndexOf('/'));
 554             }
 555             parentFragmentEntity = getFragmentWithoutDescendantsByXpath(dataspaceName, anchorName, parentNodeXpath);
 556             final String lastXpathElement = targetXpath.substring(targetXpath.lastIndexOf('/'));
 557             final boolean isListElement = REG_EX_PATTERN_FOR_LIST_ELEMENT_KEY_PREDICATE
 558                     .matcher(lastXpathElement).find();
 559             if (isListElement) {
 560                 targetDeleted = deleteDataNode(parentFragmentEntity, targetXpath);
 561             } else {
 562                 targetDeleted = deleteAllListElements(parentFragmentEntity, targetXpath);
 563                 final boolean tryToDeleteDataNode = !targetDeleted && !onlySupportListNodeDeletion;
 564                 if (tryToDeleteDataNode) {
 565                     targetDeleted = deleteDataNode(parentFragmentEntity, targetXpath);
 566                 }
 567             }
 568         }
 569         if (!targetDeleted) {
 570             final String additionalInformation = onlySupportListNodeDeletion
 571                     ? "The target is probably not a List." : "";
 572             throw new DataNodeNotFoundException(parentFragmentEntity.getDataspace().getName(),
 573                     parentFragmentEntity.getAnchor().getName(), targetXpath, additionalInformation);
 574         }
 575     }
 576
 577     private boolean deleteDataNode(final FragmentEntity parentFragmentEntity, final String targetXpath) {
 578         final String normalizedTargetXpath = CpsPathUtil.getNormalizedXpath(targetXpath);
 579         if (parentFragmentEntity.getXpath().equals(normalizedTargetXpath)) {
 580             fragmentRepository.delete(parentFragmentEntity);
 581             return true;
 582         }
 583         if (parentFragmentEntity.getChildFragments()
 584                 .removeIf(fragment -> fragment.getXpath().equals(normalizedTargetXpath))) {
 585             fragmentRepository.save(parentFragmentEntity);
 586             return true;
 587         }
 588         return false;
 589     }
 590
 591     private boolean deleteAllListElements(final FragmentEntity parentFragmentEntity, final String listXpath) {
 592         final String normalizedListXpath = CpsPathUtil.getNormalizedXpath(listXpath);
 593         final String deleteTargetXpathPrefix = normalizedListXpath + "[";
 594         if (parentFragmentEntity.getChildFragments()
 595                 .removeIf(fragment -> fragment.getXpath().startsWith(deleteTargetXpathPrefix))) {
 596             fragmentRepository.save(parentFragmentEntity);
 597             return true;
 598         }
 599         return false;
 600     }
 601
 602     private static void deleteListElements(
 603             final Collection<FragmentEntity> fragmentEntities,
 604             final Map<String, FragmentEntity> existingListElementFragmentEntitiesByXPath) {
 605         fragmentEntities.removeAll(existingListElementFragmentEntitiesByXPath.values());
 606     }
 607
 608     private static String getListElementXpathPrefix(final Collection<DataNode> newListElements) {
 609         if (newListElements.isEmpty()) {
 610             throw new CpsAdminException("Invalid list replacement",
 611                     "Cannot replace list elements with empty collection");
 612         }
 613         final String firstChildNodeXpath = newListElements.iterator().next().getXpath();
 614         return firstChildNodeXpath.substring(0, firstChildNodeXpath.lastIndexOf('[') + 1);
 615     }
 616
 617     private FragmentEntity getFragmentForReplacement(final FragmentEntity parentEntity,
 618                                                      final DataNode newListElement,
 619                                                      final FragmentEntity existingListElementEntity) {
 620         if (existingListElementEntity == null) {
 621             return convertToFragmentWithAllDescendants(
 622                     parentEntity.getDataspace(), parentEntity.getAnchor(), newListElement);
 623         }
 624         if (newListElement.getChildDataNodes().isEmpty()) {
 625             copyAttributesFromNewListElement(existingListElementEntity, newListElement);
 626             existingListElementEntity.getChildFragments().clear();
 627         } else {
 628             updateFragmentEntityAndDescendantsWithDataNode(existingListElementEntity, newListElement);
 629         }
 630         return existingListElementEntity;
 631     }
 632
 633     private static boolean isNewDataNode(final DataNode replacementDataNode,
 634                                          final Map<String, FragmentEntity> existingListElementsByXpath) {
 635         return !existingListElementsByXpath.containsKey(replacementDataNode.getXpath());
 636     }
 637
 638     private static boolean isRootContainerNodeXpath(final String xpath) {
 639         return 0 == xpath.lastIndexOf('/');
 640     }
 641
 642     private void copyAttributesFromNewListElement(final FragmentEntity existingListElementEntity,
 643                                                   final DataNode newListElement) {
 644         final FragmentEntity replacementFragmentEntity =
 645                 FragmentEntity.builder().attributes(jsonObjectMapper.asJsonString(
 646                         newListElement.getLeaves())).build();
 647         existingListElementEntity.setAttributes(replacementFragmentEntity.getAttributes());
 648     }
 649
 650     private static Map<String, FragmentEntity> extractListElementFragmentEntitiesByXPath(
 651             final Set<FragmentEntity> childEntities, final String listElementXpathPrefix) {
 652         return childEntities.stream()
 653                 .filter(fragmentEntity -> fragmentEntity.getXpath().startsWith(listElementXpathPrefix))
 654                 .collect(Collectors.toMap(FragmentEntity::getXpath, fragmentEntity -> fragmentEntity));
 655     }
 656
 657     private static boolean isRootXpath(final String xpath) {
 658         return "/".equals(xpath) || "".equals(xpath);
 659     }
 660 }