scim-server-examples/scim-server-memory/src/main/java/org/apache/directory/scim/example/memory/service/InMemoryGroupService.java [84:136]:
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      resource.setExternalId(resource.getDisplayName());
    }

    // check to make sure the group doesn't already exist
    boolean existingGroupFound = groups.values().stream()
      .anyMatch(group -> resource.getExternalId().equals(group.getExternalId()));
    if (existingGroupFound) {
      // HTTP leaking into data layer
      throw new UnableToCreateResourceException(Response.Status.CONFLICT, "Group '" + resource.getExternalId() + "' already exists.");
    }

    resource.setId(id);
    groups.put(id, resource);
    return resource;
  }

  @Override
  public ScimGroup update(UpdateRequest<ScimGroup> updateRequest) throws UnableToUpdateResourceException {
    String id = updateRequest.getId();
    ScimGroup resource = updateRequest.getResource();
    groups.put(id, resource);
    return resource;
  }

  @Override
  public ScimGroup get(String id) {
    return groups.get(id);
  }

  @Override
  public void delete(String id) {
    groups.remove(id);
  }

  @Override
  public FilterResponse<ScimGroup> find(Filter filter, PageRequest pageRequest, SortRequest sortRequest) {
    long count = pageRequest.getCount() != null ? pageRequest.getCount() : groups.size();
    long startIndex = pageRequest.getStartIndex() != null
      ? pageRequest.getStartIndex() - 1 // SCIM is 1-based indexed
      : 0;

    List<ScimGroup> result = groups.values().stream()
      .skip(startIndex)
      .limit(count)
      .filter(FilterExpressions.inMemory(filter, schemaRegistry.getSchema(ScimGroup.SCHEMA_URI)))
      .collect(Collectors.toList());

    return new FilterResponse<>(result, pageRequest, result.size());
  }

  @Override
  public List<Class<? extends ScimExtension>> getExtensionList() {
    return Collections.emptyList();
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scim-server-examples/scim-server-spring-boot/src/main/java/org/apache/directory/scim/example/spring/service/InMemoryGroupService.java [74:126]:
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      resource.setExternalId(resource.getDisplayName());
    }

    // check to make sure the group doesn't already exist
    boolean existingGroupFound = groups.values().stream()
      .anyMatch(group -> resource.getExternalId().equals(group.getExternalId()));
    if (existingGroupFound) {
      // HTTP leaking into data layer
      throw new UnableToCreateResourceException(Response.Status.CONFLICT, "Group '" + resource.getExternalId() + "' already exists.");
    }

    resource.setId(id);
    groups.put(id, resource);
    return resource;
  }

  @Override
  public ScimGroup update(UpdateRequest<ScimGroup> updateRequest) throws UnableToUpdateResourceException {
    String id = updateRequest.getId();
    ScimGroup resource = updateRequest.getResource();
    groups.put(id, resource);
    return resource;
  }

  @Override
  public ScimGroup get(String id) {
    return groups.get(id);
  }

  @Override
  public void delete(String id) {
    groups.remove(id);
  }

  @Override
  public FilterResponse<ScimGroup> find(Filter filter, PageRequest pageRequest, SortRequest sortRequest) {
    long count = pageRequest.getCount() != null ? pageRequest.getCount() : groups.size();
    long startIndex = pageRequest.getStartIndex() != null
      ? pageRequest.getStartIndex() - 1 // SCIM is 1-based indexed
      : 0;

    List<ScimGroup> result = groups.values().stream()
      .skip(startIndex)
      .limit(count)
      .filter(FilterExpressions.inMemory(filter, schemaRegistry.getSchema(ScimGroup.SCHEMA_URI)))
      .collect(Collectors.toList());

    return new FilterResponse<>(result, pageRequest, result.size());
  }

  @Override
  public List<Class<? extends ScimExtension>> getExtensionList() {
    return Collections.emptyList();
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