Examples with Task org.alfresco.rest.workflow.api.model.Task used on opensource projects

Example 1 with Task

use of org.alfresco.rest.workflow.api.model.Task in project alfresco-remote-api by Alfresco.

the class TasksImpl method update.

@Override
public Task update(String taskId, Task task, Parameters parameters) {
    TaskStateTransition taskAction = null;
    List<String> selectedProperties = parameters.getSelectedProperties();
    if (selectedProperties.contains("state")) {
        taskAction = TaskStateTransition.getTaskActionFromString(task.getState());
    }
    // Fetch the task unfiltered, we check authorization below
    TaskQuery query = activitiProcessEngine.getTaskService().createTaskQuery().taskId(taskId);
    org.activiti.engine.task.Task taskInstance = query.singleResult();
    if (taskInstance == null) {
        // Check if task exists in history, to be able to return appropriate error when trying to update an
        // existing completed task vs. an unexisting task vs. unauthorized
        boolean taskHasExisted = activitiProcessEngine.getHistoryService().createHistoricTaskInstanceQuery().taskId(taskId).count() > 0;
        if (taskHasExisted) {
            throw new UnsupportedResourceOperationException("Task with id: " + taskId + " cannot be updated, it's completed");
        } else {
            throw new EntityNotFoundException(taskId);
        }
    } else {
        String user = AuthenticationUtil.getRunAsUser();
        // Check if user is either assignee, owner or admin
        boolean authorized = authorityService.isAdminAuthority(user) || user.equals(taskInstance.getOwner()) || user.equals(taskInstance.getAssignee());
        Set<String> candidateGroups = new HashSet<String>();
        if (!authorized) {
            // Check if user is initiator of the process this task is involved with
            List<IdentityLink> linksForTask = activitiProcessEngine.getTaskService().getIdentityLinksForTask(taskId);
            // the identity-links, there is no reason why we should check candidate using a DB-query
            for (IdentityLink link : linksForTask) {
                if (user.equals(link.getUserId()) && IdentityLinkType.STARTER.equals(link.getType())) {
                    authorized = true;
                    break;
                }
                // MNT-13276
                if ((taskInstance.getAssignee() == null) && (link.getGroupId() != null) && link.getType().equals(IdentityLinkType.CANDIDATE)) {
                    Set<String> userGroups = authorityService.getAuthoritiesForUser(user);
                    if (userGroups.contains(link.getGroupId())) {
                        authorized = true;
                        break;
                    }
                }
                if (taskAction == TaskStateTransition.CLAIMED && link.getGroupId() != null && link.getType().equals(IdentityLinkType.CANDIDATE)) {
                    candidateGroups.add(link.getGroupId());
                }
                if (taskAction == TaskStateTransition.CLAIMED && link.getUserId() != null && link.getType().equals(IdentityLinkType.CANDIDATE) && user.equals(link.getUserId())) {
                    // User is a direct candidate for the task, authorized to claim
                    authorized = true;
                    break;
                }
            }
        }
        // When claiming, a limited update (set assignee through claim) is allowed
        if (!authorized && taskAction == TaskStateTransition.CLAIMED) {
            Set<String> userGroups = authorityService.getAuthoritiesForUser(user);
            for (String group : candidateGroups) {
                if (userGroups.contains(group)) {
                    authorized = true;
                    break;
                }
            }
        }
        if (!authorized) {
            // None of the above conditions are met, not authorized to update task
            throw new PermissionDeniedException();
        }
    }
    // Update fields if no action is required
    if (taskAction == null) {
        // Only update task in Activiti API if actual properties are changed
        if (updateTaskProperties(selectedProperties, task, taskInstance)) {
            activitiProcessEngine.getTaskService().saveTask(taskInstance);
        }
    } else {
        // Perform actions associated to state transition
        if (taskAction != null) {
            // look for variables submitted with task action
            Map<String, Object> globalVariables = new HashMap<String, Object>();
            Map<String, Object> localVariables = new HashMap<String, Object>();
            if (selectedProperties.contains("variables") && task.getVariables() != null && task.getVariables().size() > 0) {
                for (TaskVariable taskVariable : task.getVariables()) {
                    taskVariable = convertToTypedVariable(taskVariable, taskInstance);
                    if (taskVariable.getVariableScope() == VariableScope.GLOBAL) {
                        globalVariables.put(taskVariable.getName(), taskVariable.getValue());
                    } else {
                        localVariables.put(taskVariable.getName(), taskVariable.getValue());
                    }
                }
            }
            switch(taskAction) {
                case CLAIMED:
                    try {
                        activitiProcessEngine.getTaskService().claim(taskId, AuthenticationUtil.getRunAsUser());
                    } catch (ActivitiTaskAlreadyClaimedException atace) {
                        throw new ConstraintViolatedException("The task is already claimed by another user.");
                    }
                    break;
                case COMPLETED:
                    if (localVariables.size() > 0) {
                        activitiProcessEngine.getTaskService().setVariablesLocal(taskId, localVariables);
                    }
                    setOutcome(taskId);
                    if (globalVariables.size() > 0) {
                        activitiProcessEngine.getTaskService().complete(taskId, globalVariables);
                    } else {
                        activitiProcessEngine.getTaskService().complete(taskId);
                    }
                    break;
                case DELEGATED:
                    if (selectedProperties.contains("assignee") && task.getAssignee() != null) {
                        if (taskInstance.getAssignee() == null || !taskInstance.getAssignee().equals(AuthenticationUtil.getRunAsUser())) {
                            // Alter assignee before delegating to preserve trail of who actually delegated
                            activitiProcessEngine.getTaskService().setAssignee(taskId, AuthenticationUtil.getRunAsUser());
                        }
                        activitiProcessEngine.getTaskService().delegateTask(taskId, task.getAssignee());
                    } else {
                        throw new InvalidArgumentException("When delegating a task, assignee should be selected and provided in the request.");
                    }
                    break;
                case RESOLVED:
                    if (localVariables.size() > 0) {
                        activitiProcessEngine.getTaskService().setVariablesLocal(taskId, localVariables);
                    }
                    setOutcome(taskId);
                    if (globalVariables.size() > 0) {
                        activitiProcessEngine.getTaskService().resolveTask(taskId, globalVariables);
                    } else {
                        activitiProcessEngine.getTaskService().resolveTask(taskId);
                    }
                    break;
                case UNCLAIMED:
                    activitiProcessEngine.getTaskService().setAssignee(taskId, null);
                    break;
            }
        }
    }
    Task responseTask = new Task(activitiProcessEngine.getHistoryService().createHistoricTaskInstanceQuery().taskId(taskId).singleResult());
    // if the task is not ended the task state might be pending or resolved
    if (responseTask.getEndedAt() == null) {
        try {
            org.activiti.engine.task.Task runningTask = activitiProcessEngine.getTaskService().createTaskQuery().taskId(taskId).singleResult();
            if (runningTask != null) {
                if (runningTask.getDelegationState() == DelegationState.PENDING) {
                    responseTask.setState(TaskStateTransition.DELEGATED.name().toLowerCase());
                } else if (runningTask.getDelegationState() == DelegationState.RESOLVED) {
                    responseTask.setState(TaskStateTransition.RESOLVED.name().toLowerCase());
                }
            }
        } catch (Exception e) {
        // ignore the exception
        }
    }
    return responseTask;
}

Example 2 with Task

use of org.alfresco.rest.workflow.api.model.Task in project alfresco-remote-api by Alfresco.

the class TasksImpl method getTasks.

@Override
public CollectionWithPagingInfo<Task> getTasks(Parameters parameters) {
    Paging paging = parameters.getPaging();
    MapBasedQueryWalker propertyWalker = new MapBasedQueryWalker(TASK_COLLECTION_EQUALS_QUERY_PROPERTIES, TASK_COLLECTION_MATCHES_QUERY_PROPERTIES);
    propertyWalker.setSupportedGreaterThanParameters(TASK_COLLECTION_GREATERTHAN_QUERY_PROPERTIES);
    propertyWalker.setSupportedGreaterThanOrEqualParameters(TASK_COLLECTION_GREATERTHANOREQUAL_QUERY_PROPERTIES);
    propertyWalker.setSupportedLessThanParameters(TASK_COLLECTION_LESSTHAN_QUERY_PROPERTIES);
    propertyWalker.setSupportedLessThanOrEqualParameters(TASK_COLLECTION_LESSTHANOREQUAL_QUERY_PROPERTIES);
    propertyWalker.enableVariablesSupport(namespaceService, dictionaryService);
    if (parameters.getQuery() != null) {
        QueryHelper.walk(parameters.getQuery(), propertyWalker);
    }
    String status = propertyWalker.getProperty("status", WhereClauseParser.EQUALS);
    String assignee = propertyWalker.getProperty("assignee", WhereClauseParser.EQUALS);
    String assigneeLike = propertyWalker.getProperty("assignee", WhereClauseParser.MATCHES);
    String owner = propertyWalker.getProperty("owner", WhereClauseParser.EQUALS);
    String ownerLike = propertyWalker.getProperty("owner", WhereClauseParser.MATCHES);
    String candidateUser = propertyWalker.getProperty("candidateUser", WhereClauseParser.EQUALS);
    String candidateGroup = propertyWalker.getProperty("candidateGroup", WhereClauseParser.EQUALS);
    String name = propertyWalker.getProperty("name", WhereClauseParser.EQUALS);
    String nameLike = propertyWalker.getProperty("name", WhereClauseParser.MATCHES);
    String description = propertyWalker.getProperty("description", WhereClauseParser.EQUALS);
    String descriptionLike = propertyWalker.getProperty("description", WhereClauseParser.MATCHES);
    Integer priority = propertyWalker.getProperty("priority", WhereClauseParser.EQUALS, Integer.class);
    Integer priorityGreaterThanOrEquals = propertyWalker.getProperty("priority", WhereClauseParser.GREATERTHANOREQUALS, Integer.class);
    Integer priorityLessThanOrEquals = propertyWalker.getProperty("priority", WhereClauseParser.LESSTHANOREQUALS, Integer.class);
    String processInstanceId = propertyWalker.getProperty("processId", WhereClauseParser.EQUALS);
    String processInstanceBusinessKey = propertyWalker.getProperty("processBusinessKey", WhereClauseParser.EQUALS);
    String processInstanceBusinessKeyLike = propertyWalker.getProperty("processBusinessKey", WhereClauseParser.MATCHES);
    String activityDefinitionId = propertyWalker.getProperty("activityDefinitionId", WhereClauseParser.EQUALS);
    String activityDefinitionIdLike = propertyWalker.getProperty("activityDefinitionId", WhereClauseParser.MATCHES);
    String processDefinitionId = propertyWalker.getProperty("processDefinitionId", WhereClauseParser.EQUALS);
    String processDefinitionKey = propertyWalker.getProperty("processDefinitionKey", WhereClauseParser.EQUALS);
    String processDefinitionKeyLike = propertyWalker.getProperty("processDefinitionKey", WhereClauseParser.MATCHES);
    String processDefinitionName = propertyWalker.getProperty("processDefinitionName", WhereClauseParser.EQUALS);
    String processDefinitionNameLike = propertyWalker.getProperty("processDefinitionName", WhereClauseParser.MATCHES);
    Date startedAt = propertyWalker.getProperty("startedAt", WhereClauseParser.EQUALS, Date.class);
    Date startedAtGreaterThan = propertyWalker.getProperty("startedAt", WhereClauseParser.GREATERTHAN, Date.class);
    Date startedAtLessThan = propertyWalker.getProperty("startedAt", WhereClauseParser.LESSTHAN, Date.class);
    Date endedAt = propertyWalker.getProperty("endedAt", WhereClauseParser.EQUALS, Date.class);
    Date endedAtGreaterThan = propertyWalker.getProperty("endedAt", WhereClauseParser.GREATERTHAN, Date.class);
    Date endedAtLessThan = propertyWalker.getProperty("endedAt", WhereClauseParser.LESSTHAN, Date.class);
    Date dueAt = propertyWalker.getProperty("dueAt", WhereClauseParser.EQUALS, Date.class);
    Date dueAtGreaterThan = propertyWalker.getProperty("dueAt", WhereClauseParser.GREATERTHAN, Date.class);
    Date dueAtLessThan = propertyWalker.getProperty("dueAt", WhereClauseParser.LESSTHAN, Date.class);
    Boolean includeProcessVariables = propertyWalker.getProperty("includeProcessVariables", WhereClauseParser.EQUALS, Boolean.class);
    Boolean includeTaskVariables = propertyWalker.getProperty("includeTaskVariables", WhereClauseParser.EQUALS, Boolean.class);
    List<SortColumn> sortList = parameters.getSorting();
    SortColumn sortColumn = null;
    if (sortList != null && sortList.size() > 0) {
        if (sortList.size() != 1) {
            throw new InvalidArgumentException("Only one order by parameter is supported");
        }
        sortColumn = sortList.get(0);
    }
    List<Task> page = null;
    int totalCount = 0;
    if (status == null || STATUS_ACTIVE.equals(status)) {
        TaskQuery query = activitiProcessEngine.getTaskService().createTaskQuery();
        if (assignee != null)
            query.taskAssignee(assignee);
        if (assigneeLike != null)
            query.taskAssigneeLike(assigneeLike);
        if (owner != null)
            query.taskOwner(owner);
        if (ownerLike != null)
            query.taskOwner(ownerLike);
        if (candidateUser != null) {
            Set<String> parents = authorityService.getContainingAuthorities(AuthorityType.GROUP, candidateUser, false);
            if (parents != null) {
                List<String> authorities = new ArrayList<String>();
                authorities.addAll(parents);
                // there's a limitation in at least Oracle for using an IN statement with more than 1000 items
                if (parents.size() > 1000) {
                    authorities = authorities.subList(0, 1000);
                }
                if (authorities.size() > 0) {
                    query.taskCandidateGroupIn(authorities);
                } else {
                    query.taskCandidateUser(candidateUser);
                }
            }
        }
        if (candidateGroup != null)
            query.taskCandidateGroup(candidateGroup);
        if (name != null)
            query.taskName(name);
        if (nameLike != null)
            query.taskNameLike(nameLike);
        if (description != null)
            query.taskDescription(description);
        if (descriptionLike != null)
            query.taskDescriptionLike(descriptionLike);
        if (priority != null)
            query.taskPriority(priority);
        if (priorityGreaterThanOrEquals != null)
            query.taskMinPriority(priorityGreaterThanOrEquals);
        if (priorityLessThanOrEquals != null)
            query.taskMaxPriority(priorityLessThanOrEquals);
        if (processInstanceId != null)
            query.processInstanceId(processInstanceId);
        if (processInstanceBusinessKey != null)
            query.processInstanceBusinessKey(processInstanceBusinessKey);
        if (processInstanceBusinessKeyLike != null)
            query.processInstanceBusinessKeyLike(processInstanceBusinessKeyLike);
        if (activityDefinitionId != null)
            query.taskDefinitionKey(activityDefinitionId);
        if (activityDefinitionIdLike != null)
            query.taskDefinitionKey(activityDefinitionIdLike);
        if (processDefinitionId != null)
            query.processDefinitionId(processDefinitionId);
        if (processDefinitionKey != null)
            query.processDefinitionKey(processDefinitionKey);
        if (processDefinitionKeyLike != null)
            query.processDefinitionKeyLike(processDefinitionKeyLike);
        if (processDefinitionName != null)
            query.processDefinitionName(processDefinitionName);
        if (processDefinitionNameLike != null)
            query.processDefinitionNameLike(processDefinitionNameLike);
        if (dueAt != null)
            query.dueDate(dueAt);
        if (dueAtGreaterThan != null)
            query.dueAfter(dueAtGreaterThan);
        if (dueAtLessThan != null)
            query.dueBefore(dueAtLessThan);
        if (startedAt != null)
            query.taskCreatedOn(startedAt);
        if (startedAtGreaterThan != null)
            query.taskCreatedAfter(startedAtGreaterThan);
        if (startedAtLessThan != null)
            query.taskCreatedBefore(startedAtLessThan);
        if (includeProcessVariables != null && includeProcessVariables) {
            query.includeProcessVariables();
        }
        if (includeTaskVariables != null && includeTaskVariables) {
            query.includeTaskLocalVariables();
        }
        // use the limit set in alfresco-global.properties
        query.limitTaskVariables(taskVariablesLimit);
        List<QueryVariableHolder> variableProperties = propertyWalker.getVariableProperties();
        setQueryUsingVariables(query, variableProperties);
        // Add tenant-filtering
        if (tenantService.isEnabled()) {
            query.processVariableValueEquals(ActivitiConstants.VAR_TENANT_DOMAIN, TenantUtil.getCurrentDomain());
        }
        // Add involvement filtering if user is not admin
        if (processInstanceId == null && !authorityService.isAdminAuthority(AuthenticationUtil.getRunAsUser()) && candidateUser == null && candidateGroup == null) {
            query.taskInvolvedUser(AuthenticationUtil.getRunAsUser());
        }
        setSorting(query, sortColumn);
        List<org.activiti.engine.task.Task> tasks = query.listPage(paging.getSkipCount(), paging.getMaxItems());
        totalCount = (int) query.count();
        page = new ArrayList<Task>(tasks.size());
        Map<String, TypeDefinition> definitionTypeMap = new HashMap<String, TypeDefinition>();
        for (org.activiti.engine.task.Task taskInstance : tasks) {
            Task task = new Task(taskInstance);
            task.setFormResourceKey(getFormResourceKey(taskInstance));
            if ((includeProcessVariables != null && includeProcessVariables) || (includeTaskVariables != null && includeTaskVariables)) {
                addVariables(task, includeProcessVariables, includeTaskVariables, taskInstance.getProcessVariables(), taskInstance.getTaskLocalVariables(), definitionTypeMap);
            }
            page.add(task);
        }
    } else if (STATUS_COMPLETED.equals(status) || STATUS_ANY.equals(status)) {
        // Candidate user and group is only supported with STATUS_ACTIVE
        if (candidateUser != null) {
            throw new InvalidArgumentException("Filtering on candidateUser is only allowed in combination with status-parameter 'active'");
        }
        if (candidateGroup != null) {
            throw new InvalidArgumentException("Filtering on candidateGroup is only allowed in combination with status-parameter 'active'");
        }
        HistoricTaskInstanceQuery query = activitiProcessEngine.getHistoryService().createHistoricTaskInstanceQuery();
        if (STATUS_COMPLETED.equals(status))
            query.finished();
        if (assignee != null)
            query.taskAssignee(assignee);
        if (assigneeLike != null)
            query.taskAssigneeLike(assigneeLike);
        if (owner != null)
            query.taskOwner(owner);
        if (ownerLike != null)
            query.taskOwnerLike(ownerLike);
        if (name != null)
            query.taskName(name);
        if (nameLike != null)
            query.taskNameLike(nameLike);
        if (description != null)
            query.taskDescription(description);
        if (descriptionLike != null)
            query.taskDescriptionLike(descriptionLike);
        if (priority != null)
            query.taskPriority(priority);
        if (priorityGreaterThanOrEquals != null)
            query.taskMinPriority(priorityGreaterThanOrEquals);
        if (priorityLessThanOrEquals != null)
            query.taskMaxPriority(priorityLessThanOrEquals);
        if (processInstanceId != null)
            query.processInstanceId(processInstanceId);
        if (processInstanceBusinessKey != null)
            query.processInstanceBusinessKey(processInstanceBusinessKey);
        if (processInstanceBusinessKeyLike != null)
            query.processInstanceBusinessKeyLike(processInstanceBusinessKeyLike);
        if (activityDefinitionId != null)
            query.taskDefinitionKey(activityDefinitionId);
        if (activityDefinitionIdLike != null)
            query.taskDefinitionKey(activityDefinitionIdLike);
        if (processDefinitionId != null)
            query.processDefinitionId(processDefinitionId);
        if (processDefinitionKey != null)
            query.processDefinitionKey(processDefinitionKey);
        if (processDefinitionKeyLike != null)
            query.processDefinitionKeyLike(processDefinitionKeyLike);
        if (processDefinitionName != null)
            query.processDefinitionName(processDefinitionName);
        if (processDefinitionNameLike != null)
            query.processDefinitionNameLike(processDefinitionNameLike);
        if (dueAt != null)
            query.taskDueDate(dueAt);
        if (dueAtGreaterThan != null)
            query.taskDueAfter(dueAtGreaterThan);
        if (dueAtLessThan != null)
            query.taskDueBefore(dueAtLessThan);
        if (startedAt != null)
            query.taskCreatedOn(startedAt);
        if (startedAtGreaterThan != null)
            query.taskCreatedAfter(startedAtGreaterThan);
        if (startedAtLessThan != null)
            query.taskCreatedBefore(startedAtLessThan);
        if (endedAt != null)
            query.taskCompletedOn(endedAt);
        if (endedAtGreaterThan != null)
            query.taskCompletedAfter(endedAtGreaterThan);
        if (endedAtLessThan != null)
            query.taskCompletedBefore(endedAtLessThan);
        if (includeProcessVariables != null && includeProcessVariables) {
            query.includeProcessVariables();
        }
        if (includeTaskVariables != null && includeTaskVariables) {
            query.includeTaskLocalVariables();
        }
        List<QueryVariableHolder> variableProperties = propertyWalker.getVariableProperties();
        setQueryUsingVariables(query, variableProperties);
        // Add tenant filtering
        if (tenantService.isEnabled()) {
            query.processVariableValueEquals(ActivitiConstants.VAR_TENANT_DOMAIN, TenantUtil.getCurrentDomain());
        }
        // Add involvement filtering if user is not admin
        if (processInstanceId == null && !authorityService.isAdminAuthority(AuthenticationUtil.getRunAsUser())) {
            query.taskInvolvedUser(AuthenticationUtil.getRunAsUser());
        }
        setSorting(query, sortColumn);
        List<HistoricTaskInstance> tasks = query.listPage(paging.getSkipCount(), paging.getMaxItems());
        totalCount = (int) query.count();
        page = new ArrayList<Task>(tasks.size());
        Map<String, TypeDefinition> definitionTypeMap = new HashMap<String, TypeDefinition>();
        for (HistoricTaskInstance taskInstance : tasks) {
            Task task = new Task(taskInstance);
            if ((includeProcessVariables != null && includeProcessVariables) || (includeTaskVariables != null && includeTaskVariables)) {
                addVariables(task, includeProcessVariables, includeTaskVariables, taskInstance.getProcessVariables(), taskInstance.getTaskLocalVariables(), definitionTypeMap);
            }
            page.add(task);
        }
    } else {
        throw new InvalidArgumentException("Invalid status parameter: " + status);
    }
    return CollectionWithPagingInfo.asPaged(paging, page, (page.size() + paging.getSkipCount()) < totalCount, totalCount);
}

Example 3 with Task

use of org.alfresco.rest.workflow.api.model.Task in project alfresco-remote-api by Alfresco.

the class TasksImpl method getTasks.

@Override
public CollectionWithPagingInfo<Task> getTasks(String processId, Parameters parameters) {
    Paging paging = parameters.getPaging();
    String status = parameters.getParameter("status");
    List<SortColumn> sortList = parameters.getSorting();
    SortColumn sortColumn = null;
    if (sortList != null && sortList.size() > 0) {
        if (sortList.size() != 1) {
            throw new InvalidArgumentException("Only one order by parameter is supported");
        }
        sortColumn = sortList.get(0);
    }
    validateIfUserAllowedToWorkWithProcess(processId);
    List<Task> page = null;
    int totalCount = 0;
    if (status == null || STATUS_ACTIVE.equals(status)) {
        TaskQuery query = activitiProcessEngine.getTaskService().createTaskQuery();
        query.processInstanceId(processId);
        setSorting(query, sortColumn);
        List<org.activiti.engine.task.Task> tasks = query.listPage(paging.getSkipCount(), paging.getMaxItems());
        totalCount = (int) query.count();
        page = new ArrayList<Task>(tasks.size());
        for (org.activiti.engine.task.Task taskInstance : tasks) {
            Task task = new Task(taskInstance);
            task.setFormResourceKey(getFormResourceKey(taskInstance));
            page.add(task);
        }
    } else if (STATUS_COMPLETED.equals(status) || STATUS_ANY.equals(status)) {
        HistoricTaskInstanceQuery query = activitiProcessEngine.getHistoryService().createHistoricTaskInstanceQuery();
        if (STATUS_COMPLETED.equals(status))
            query.finished();
        query.processInstanceId(processId);
        // Add tenant filtering
        if (tenantService.isEnabled()) {
            query.processVariableValueEquals(ActivitiConstants.VAR_TENANT_DOMAIN, TenantUtil.getCurrentDomain());
        }
        setSorting(query, sortColumn);
        List<HistoricTaskInstance> tasks = query.listPage(paging.getSkipCount(), paging.getMaxItems());
        totalCount = (int) query.count();
        page = new ArrayList<Task>(tasks.size());
        for (HistoricTaskInstance taskInstance : tasks) {
            Task task = new Task(taskInstance);
            page.add(task);
        }
    } else {
        throw new InvalidArgumentException("Invalid status parameter: " + status);
    }
    return CollectionWithPagingInfo.asPaged(paging, page, (page.size() + paging.getSkipCount()) < totalCount, totalCount);
}