Source code

001/*
002 * (C) Copyright 2012 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *    Mariana Cedica
018 *
019 * $Id$
020 */
021package org.nuxeo.ecm.platform.routing.web;
022
023import static org.jboss.seam.ScopeType.CONVERSATION;
024
025import java.io.Serializable;
026import java.text.ParseException;
027import java.text.SimpleDateFormat;
028import java.util.ArrayList;
029import java.util.Collections;
030import java.util.Date;
031import java.util.HashMap;
032import java.util.HashSet;
033import java.util.LinkedHashMap;
034import java.util.List;
035import java.util.Map;
036import java.util.Set;
037
038import javax.faces.application.FacesMessage;
039import javax.faces.component.EditableValueHolder;
040import javax.faces.component.UIComponent;
041import javax.faces.context.FacesContext;
042import javax.faces.validator.ValidatorException;
043
044import org.apache.commons.lang.StringUtils;
045import org.apache.commons.logging.Log;
046import org.apache.commons.logging.LogFactory;
047import org.jboss.seam.annotations.In;
048import org.jboss.seam.annotations.Name;
049import org.jboss.seam.annotations.Observer;
050import org.jboss.seam.annotations.Scope;
051import org.jboss.seam.annotations.intercept.BypassInterceptors;
052import org.jboss.seam.annotations.web.RequestParameter;
053import org.jboss.seam.core.Events;
054import org.jboss.seam.faces.FacesMessages;
055import org.jboss.seam.international.StatusMessage;
056import org.nuxeo.ecm.core.api.CoreSession;
057import org.nuxeo.ecm.core.api.DocumentModel;
058import org.nuxeo.ecm.core.api.DocumentNotFoundException;
059import org.nuxeo.ecm.core.api.IdRef;
060import org.nuxeo.ecm.core.api.NuxeoException;
061import org.nuxeo.ecm.core.api.UnrestrictedSessionRunner;
062import org.nuxeo.ecm.core.api.security.SecurityConstants;
063import org.nuxeo.ecm.platform.actions.Action;
064import org.nuxeo.ecm.platform.actions.ActionContext;
065import org.nuxeo.ecm.platform.actions.ejb.ActionManager;
066import org.nuxeo.ecm.platform.contentview.seam.ContentViewActions;
067import org.nuxeo.ecm.platform.forms.layout.api.LayoutDefinition;
068import org.nuxeo.ecm.platform.forms.layout.service.WebLayoutManager;
069import org.nuxeo.ecm.platform.routing.api.DocumentRoutingConstants;
070import org.nuxeo.ecm.platform.routing.api.DocumentRoutingService;
071import org.nuxeo.ecm.platform.routing.api.exception.DocumentRouteException;
072import org.nuxeo.ecm.platform.routing.core.impl.GraphNode;
073import org.nuxeo.ecm.platform.routing.core.impl.GraphNode.Button;
074import org.nuxeo.ecm.platform.routing.core.impl.GraphRoute;
075import org.nuxeo.ecm.platform.task.Task;
076import org.nuxeo.ecm.platform.task.TaskEventNames;
077import org.nuxeo.ecm.platform.task.TaskImpl;
078import org.nuxeo.ecm.platform.ui.web.api.NavigationContext;
079import org.nuxeo.ecm.platform.ui.web.util.ComponentUtils;
080import org.nuxeo.ecm.webapp.action.ActionContextProvider;
081import org.nuxeo.ecm.webapp.documentsLists.DocumentsListsManager;
082import org.nuxeo.ecm.webapp.helpers.EventNames;
083import org.nuxeo.runtime.api.Framework;
084
085/**
086 * Task validators
087 *
088 * @since 5.6
089 */
090@Scope(CONVERSATION)
091@Name("routingTaskActions")
092public class RoutingTaskActionsBean implements Serializable {
093
094    private static final long serialVersionUID = 1L;
095
096    private static final Log log = LogFactory.getLog(RoutingTaskActionsBean.class);
097
098    public static final String SUBJECT_PATTERN = "([a-zA-Z_0-9]*(:)[a-zA-Z_0-9]*)";
099
100    /**
101     * Runtime property name, that makes it possible to cache actions available on a given task, depending on its type.
102     * <p>
103     * This caching is global to all tasks in the platform, and will not work correctly if some tasks are filtering some
104     * actions depending on local variables, for instance.
105     *
106     * @since 5.7
107     */
108    public static final String CACHE_ACTIONS_PER_TASK_TYPE_PROP_NAME = "org.nuxeo.routing.cacheActionsPerTaskType";
109
110    @In(create = true, required = false)
111    protected transient CoreSession documentManager;
112
113    @In(required = true, create = true)
114    protected NavigationContext navigationContext;
115
116    @In(create = true, required = false)
117    protected FacesMessages facesMessages;
118
119    @In(create = true)
120    protected Map<String, String> messages;
121
122    @In(create = true)
123    protected transient DocumentsListsManager documentsListsManager;
124
125    @In(create = true, required = false)
126    protected transient ActionContextProvider actionContextProvider;
127
128    @In(create = true, required = false)
129    protected ContentViewActions contentViewActions;
130
131    @RequestParameter("button")
132    protected String button;
133
134    protected ActionManager actionService;
135
136    protected Map<String, TaskInfo> tasksInfoCache = new HashMap<String, TaskInfo>();
137
138    protected Task currentTask;
139
140    public void validateTaskDueDate(FacesContext context, UIComponent component, Object value) {
141        final String DATE_FORMAT = "dd/MM/yyyy";
142        SimpleDateFormat dateFormat = new SimpleDateFormat(DATE_FORMAT);
143
144        String messageString = null;
145        if (value != null) {
146            Date today = null;
147            Date dueDate = null;
148            try {
149                dueDate = dateFormat.parse(dateFormat.format((Date) value));
150                today = dateFormat.parse(dateFormat.format(new Date()));
151            } catch (ParseException e) {
152                messageString = "label.workflow.error.date_parsing";
153            }
154            if (dueDate.before(today)) {
155                messageString = "label.workflow.error.outdated_duedate";
156            }
157        }
158
159        if (messageString != null) {
160            FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR, ComponentUtils.translate(context,
161                    "label.workflow.error.outdated_duedate"), null);
162            ((EditableValueHolder) component).setValid(false);
163            context.addMessage(component.getClientId(context), message);
164        }
165    }
166
167    public void validateSubject(FacesContext context, UIComponent component, Object value) {
168        if (!((value instanceof String) && ((String) value).matches(SUBJECT_PATTERN))) {
169            FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR, ComponentUtils.translate(context,
170                    "label.document.routing.invalid.subject"), null);
171            context.addMessage(null, message);
172            throw new ValidatorException(message);
173        }
174    }
175
176    public String getTaskLayout(Task task) {
177        return getTaskInfo(task, true).layout;
178    }
179
180    public List<Action> getTaskButtons(Task task) {
181        List<Button> buttons = getTaskInfo(task, true).buttons;
182        List<Action> actions = new ArrayList<Action>();
183
184        DocumentModel workflowInstance = documentManager.getDocument(new IdRef(task.getProcessId()));
185        GraphRoute workflow = workflowInstance.getAdapter(GraphRoute.class);
186        if (workflow == null) {
187            // task was not created by a workflow process , no actions to
188            // display;
189            return actions;
190        }
191        GraphNode node = workflow.getNode(task.getType());
192        for (Button button : buttons) {
193            Action action = new Action(button.getName(), Action.EMPTY_CATEGORIES);
194            action.setLabel(button.getLabel());
195            boolean displayAction = true;
196            if (StringUtils.isNotEmpty(button.getFilter())) {
197                ActionContext actionContext = actionContextProvider.createActionContext();
198                if (node != null) {
199                    Map<String, Object> workflowContextualInfo = new HashMap<String, Object>();
200                    workflowContextualInfo.putAll(node.getWorkflowContextualInfo(documentManager, true));
201                    actionContext.putAllLocalVariables(workflowContextualInfo);
202                }
203                displayAction = getActionService().checkFilter(button.filter, actionContext);
204            }
205            if (displayAction) {
206                actions.add(action);
207            }
208        }
209        return actions;
210    }
211
212    public String endTask(Task task) {
213        // collect form data
214        Map<String, Object> data = new HashMap<String, Object>();
215        Map<String, Serializable> formVariables = getFormVariables(task);
216        if (getFormVariables(task) != null) {
217            data.put("WorkflowVariables", getFormVariables(task));
218            data.put("NodeVariables", getFormVariables(task));
219            // if there is a comment on the submitted form, pass it to be
220            // logged
221            // by audit
222            if (formVariables.containsKey(GraphNode.NODE_VARIABLE_COMMENT)) {
223                data.put(GraphNode.NODE_VARIABLE_COMMENT, formVariables.get(GraphNode.NODE_VARIABLE_COMMENT));
224            }
225        }
226        // add the button name that was clicked
227        try {
228            DocumentRoutingService routing = Framework.getLocalService(DocumentRoutingService.class);
229            routing.endTask(documentManager, task, data, button);
230            facesMessages.add(StatusMessage.Severity.INFO, messages.get("workflow.feedback.info.taskEnded"));
231        } catch (DocumentRouteException e) {
232            log.error(e, e);
233            facesMessages.add(StatusMessage.Severity.ERROR, messages.get("workflow.feedback.error.taskEnded"));
234        }
235        Events.instance().raiseEvent(TaskEventNames.WORKFLOW_TASK_COMPLETED);
236        clear(task.getId());
237        if (navigationContext.getCurrentDocument() != null
238                && documentManager.hasPermission(navigationContext.getCurrentDocument().getRef(),
239                        SecurityConstants.READ)) {
240            return null;
241        }
242        // if the user only had temporary permissions on the current doc given
243        // by the workflow
244        navigationContext.setCurrentDocument(null);
245        return navigationContext.goHome();
246    }
247
248    private void clear(String taskId) {
249        button = null;
250        if (tasksInfoCache.containsKey(taskId)) {
251            tasksInfoCache.remove(taskId);
252        }
253    }
254
255    public Map<String, Serializable> getFormVariables(Task task) {
256        return getTaskInfo(task, true).formVariables;
257    }
258
259    public class TaskInfo {
260        protected HashMap<String, Serializable> formVariables;
261
262        protected String layout;
263
264        protected boolean canBeReassigned;
265
266        protected List<Button> buttons;
267
268        protected List<String> actors;
269
270        protected String comment;
271
272        protected String taskId;
273
274        protected String name;
275
276        protected TaskInfo(String taskId, HashMap<String, Serializable> formVariables, String layout,
277                List<Button> buttons, boolean canBeReassigned, String name) {
278            this.formVariables = formVariables;
279            this.layout = layout;
280            this.buttons = buttons;
281            this.canBeReassigned = canBeReassigned;
282            this.taskId = taskId;
283            this.name = name;
284        }
285
286        public List<String> getActors() {
287            return actors;
288        }
289
290        public void setActors(List<String> actors) {
291            this.actors = actors;
292        }
293
294        public String getComment() {
295            return comment;
296        }
297
298        public void setComment(String comment) {
299            this.comment = comment;
300        }
301
302        public boolean isCanBeReassigned() {
303            return canBeReassigned;
304        }
305
306        public String getTaskId() {
307            return taskId;
308        }
309
310        public String getName() {
311            return name;
312        }
313    }
314
315    // we have to be unrestricted to get this info
316    // because the current user may not be the one that started the
317    // workflow
318    public TaskInfo getTaskInfo(final Task task, final boolean getFormVariables) {
319        if (tasksInfoCache.containsKey(task.getId())) {
320            return tasksInfoCache.get(task.getId());
321        }
322        final String routeDocId = task.getVariable(DocumentRoutingConstants.TASK_ROUTE_INSTANCE_DOCUMENT_ID_KEY);
323        final String nodeId = task.getVariable(DocumentRoutingConstants.TASK_NODE_ID_KEY);
324        if (routeDocId == null) {
325            throw new NuxeoException("Can not get the source graph for this task");
326        }
327        if (nodeId == null) {
328            throw new NuxeoException("Can not get the source node for this task");
329        }
330        final TaskInfo[] res = new TaskInfo[1];
331        new UnrestrictedSessionRunner(documentManager) {
332            @Override
333            public void run() {
334                DocumentModel doc = session.getDocument(new IdRef(routeDocId));
335                GraphRoute route = doc.getAdapter(GraphRoute.class);
336                GraphNode node = route.getNode(nodeId);
337                HashMap<String, Serializable> map = new HashMap<String, Serializable>();
338                if (getFormVariables) {
339                    map.putAll(node.getVariables());
340                    map.putAll(route.getVariables());
341                }
342                res[0] = new TaskInfo(task.getId(), map, node.getTaskLayout(), node.getTaskButtons(),
343                        node.allowTaskReassignment(), task.getName());
344            }
345        }.runUnrestricted();
346        // don't add tasks in cache when are fetched without the form variables
347        // for
348        // bulk processing
349        if (getFormVariables) {
350            tasksInfoCache.put(task.getId(), res[0]);
351        }
352        return res[0];
353    }
354
355    /**
356     * @since 5.6
357     */
358    public boolean isRoutingTask(Task task) {
359        return task.getDocument().hasFacet(DocumentRoutingConstants.ROUTING_TASK_FACET_NAME);
360    }
361
362    /**
363     * @since 5.6
364     */
365    public List<Action> getTaskActions(Task task) {
366        return new ArrayList<Action>(getTaskActionsMap(task).values());
367    }
368
369    // temp method because Studio also refers to empty layouts
370    protected boolean isLayoutEmpty(String layoutName) {
371        if (layoutName == null || layoutName.isEmpty()) {
372            return true;
373        }
374        // explore the layout and find out if it contains only empty widgets
375        WebLayoutManager lm = Framework.getService(WebLayoutManager.class);
376        LayoutDefinition layout = lm.getLayoutDefinition(layoutName);
377        if (layout == null || layout.isEmpty()) {
378            return true;
379        }
380        return false;
381    }
382
383    /**
384     * Helper to generate a unique action id for all task types
385     *
386     * @since 5.7
387     */
388    protected String getTaskActionId(Task task, String buttonId) {
389        return String.format("%s_%s", task.getType(), buttonId);
390    }
391
392    /**
393     * @since 5.6
394     */
395    public Map<String, Action> getTaskActionsMap(Task task) {
396        Map<String, Action> actions = new LinkedHashMap<String, Action>();
397        // bulk processing, don't fetch formVariables to avoid overriding them
398        TaskInfo taskInfo = getTaskInfo(task, false);
399        String layout = taskInfo.layout;
400        List<Button> buttons = taskInfo.buttons;
401
402        boolean addLayout = !isLayoutEmpty(layout);
403        Map<String, Serializable> props = null;
404        if (addLayout) {
405            props = new HashMap<String, Serializable>();
406            props.put("layout", layout);
407            props.put("formVariables", taskInfo.formVariables);
408        }
409
410        if (buttons != null && !buttons.isEmpty()) {
411            for (Button button : buttons) {
412                String buttonId = button.getName();
413                String id = getTaskActionId(task, buttonId);
414                Action action = new Action(id, Action.EMPTY_CATEGORIES);
415                action.setLabel(button.getLabel());
416                Map<String, Serializable> actionProps = new HashMap<String, Serializable>();
417                actionProps.put("buttonId", buttonId);
418                if (addLayout) {
419                    actionProps.putAll(props);
420                    action.setProperties(actionProps);
421                    action.setType("fancybox");
422                } else {
423                    action.setProperties(actionProps);
424                    action.setType("link");
425                }
426                boolean displayAction = true;
427                if (StringUtils.isNotEmpty(button.getFilter())) {
428                    displayAction = getActionService().checkFilter(button.filter,
429                            actionContextProvider.createActionContext());
430                }
431                if (displayAction) {
432                    actions.put(id, action);
433                }
434            }
435        }
436
437        // If there is a form attached to these tasks, add a generic
438        // process action to open the fancy box.
439        // The form of the first task will be displayed, but all the tasks
440        // concerned by this action share the same form, as they share the
441        // same type.
442        if (addLayout && !actions.isEmpty()) {
443            String id = getTaskActionId(task, "process_task");
444            Action processAction = new Action(id, Action.EMPTY_CATEGORIES);
445            processAction.setProperties(props);
446            processAction.setType("process_task");
447            actions.put(id, processAction);
448        }
449
450        return actions;
451    }
452
453    /**
454     * Returns actions for task document buttons defined in the workflow graph
455     *
456     * @since 5.6
457     */
458    @SuppressWarnings("boxing")
459    public List<Action> getTaskActions(String selectionListName) {
460        Map<String, Action> actions = new LinkedHashMap<String, Action>();
461        Map<String, Map<String, Action>> actionsPerTaskType = new LinkedHashMap<String, Map<String, Action>>();
462        Map<String, Integer> actionsCounter = new HashMap<String, Integer>();
463        List<DocumentModel> docs = documentsListsManager.getWorkingList(selectionListName);
464        boolean cachePerType = Boolean.TRUE.equals(Boolean.valueOf(Framework.getProperty(CACHE_ACTIONS_PER_TASK_TYPE_PROP_NAME)));
465        int taskDocsNum = 0;
466        if (docs != null && !docs.isEmpty()) {
467            for (DocumentModel doc : docs) {
468                if (doc.hasFacet(DocumentRoutingConstants.ROUTING_TASK_FACET_NAME)) {
469                    Task task = new TaskImpl(doc);
470                    String taskType = task.getType();
471                    Map<String, Action> taskActions = Collections.emptyMap();
472                    // if caching per type, fill the per type map, else update
473                    // actions directly
474                    if (cachePerType) {
475                        if (actionsPerTaskType.containsKey(taskType)) {
476                            taskActions = actionsPerTaskType.get(taskType);
477                        } else {
478                            taskActions = getTaskActionsMap(task);
479                            actionsPerTaskType.put(taskType, taskActions);
480                        }
481                    } else {
482                        taskActions = getTaskActionsMap(task);
483                        actions.putAll(taskActions);
484                    }
485                    for (String actionId : taskActions.keySet()) {
486                        Integer count = actionsCounter.get(actionId);
487                        if (count == null) {
488                            actionsCounter.put(actionId, 1);
489                        } else {
490                            actionsCounter.put(actionId, count + 1);
491                        }
492                    }
493                    taskDocsNum++;
494                }
495            }
496        }
497        if (cachePerType) {
498            // initialize actions for cache map
499            for (Map<String, Action> actionsPerType : actionsPerTaskType.values()) {
500                actions.putAll(actionsPerType);
501            }
502        }
503        List<Action> res = new ArrayList<Action>(actions.values());
504        for (Action action : res) {
505            if (!actionsCounter.get(action.getId()).equals(taskDocsNum)) {
506                action.setAvailable(false);
507            }
508        }
509        return res;
510    }
511
512    /**
513     * Ends a task given a selection list name and an action
514     *
515     * @since 5.6
516     */
517    @SuppressWarnings("unchecked")
518    public String endTasks(String selectionListName, Action taskAction) {
519        // collect form data
520        Map<String, Object> data = new HashMap<String, Object>();
521        String buttonId = (String) taskAction.getProperties().get("buttonId");
522        Map<String, Serializable> formVariables = (Map<String, Serializable>) taskAction.getProperties().get(
523                "formVariables");
524        if (formVariables != null) {
525            data.put("WorkflowVariables", formVariables);
526            data.put("NodeVariables", formVariables);
527            // if there is a comment on the submitted form, pass it to be
528            // logged by audit
529            if (formVariables.containsKey("comment")) {
530                data.put("comment", formVariables.get("comment"));
531            }
532        }
533
534        // get task documents
535        boolean hasErrors = false;
536        DocumentRoutingService routing = Framework.getLocalService(DocumentRoutingService.class);
537        List<DocumentModel> docs = documentsListsManager.getWorkingList(selectionListName);
538        if (docs != null && !docs.isEmpty()) {
539            for (DocumentModel doc : docs) {
540                if (doc.hasFacet(DocumentRoutingConstants.ROUTING_TASK_FACET_NAME)) {
541                    // add the button name that was clicked
542                    try {
543                        routing.endTask(documentManager, new TaskImpl(doc), data, buttonId);
544                    } catch (DocumentRouteException e) {
545                        log.error(e, e);
546                        hasErrors = true;
547                    }
548                }
549            }
550        }
551        if (hasErrors) {
552            facesMessages.add(StatusMessage.Severity.ERROR, messages.get("workflow.feedback.error.tasksEnded"));
553        } else {
554            facesMessages.add(StatusMessage.Severity.INFO, messages.get("workflow.feedback.info.tasksEnded"));
555        }
556        // reset selection list
557        documentsListsManager.resetWorkingList(selectionListName);
558        // raise document change event to trigger refresh of content views
559        // listing task documents.
560        Events.instance().raiseEvent(EventNames.DOCUMENT_CHANGED);
561        Events.instance().raiseEvent(TaskEventNames.WORKFLOW_TASK_COMPLETED);
562        return null;
563    }
564
565    private ActionManager getActionService() {
566        if (actionService == null) {
567            actionService = Framework.getLocalService(ActionManager.class);
568        }
569        return actionService;
570    }
571
572    /***
573     * @since 5.7
574     */
575    @Observer(value = { TaskEventNames.WORKFLOW_TASK_COMPLETED, TaskEventNames.WORKFLOW_TASK_REASSIGNED,
576            TaskEventNames.WORKFLOW_TASK_DELEGATED })
577    @BypassInterceptors
578    public void OnTaskCompleted() {
579        if (contentViewActions != null) {
580            contentViewActions.refreshOnSeamEvent(TaskEventNames.WORKFLOW_TASK_COMPLETED);
581            contentViewActions.resetPageProviderOnSeamEvent(TaskEventNames.WORKFLOW_TASK_COMPLETED);
582        }
583        tasksInfoCache.clear();
584        currentTask = null;
585    }
586
587    /**
588     * @since 5.7.3
589     */
590    public String reassignTask(TaskInfo taskInfo) {
591        try {
592            Framework.getLocalService(DocumentRoutingService.class).reassignTask(documentManager, taskInfo.getTaskId(),
593                    taskInfo.getActors(), taskInfo.getComment());
594            Events.instance().raiseEvent(TaskEventNames.WORKFLOW_TASK_REASSIGNED);
595        } catch (DocumentRouteException e) {
596            log.error(e);
597            facesMessages.add(StatusMessage.Severity.ERROR, messages.get("workflow.feedback.error.taskEnded"));
598        }
599        return null;
600    }
601
602    /**
603     * @since 5.7.3
604     */
605    public String getWorkflowTitle(String instanceId) {
606        String workflowTitle = "";
607
608        try {
609            DocumentModel routeInstance = documentManager.getDocument(new IdRef(instanceId));
610            workflowTitle = routeInstance.getTitle();
611        } catch (DocumentNotFoundException e) {
612            log.error("Can not fetch route instance with id " + instanceId, e);
613        }
614        return workflowTitle;
615    }
616
617    /**
618     * @since 5.8
619     */
620    public String delegateTask(TaskInfo taskInfo) {
621        try {
622            Framework.getLocalService(DocumentRoutingService.class).delegateTask(documentManager, taskInfo.getTaskId(),
623                    taskInfo.getActors(), taskInfo.getComment());
624            Events.instance().raiseEvent(TaskEventNames.WORKFLOW_TASK_DELEGATED);
625        } catch (DocumentRouteException e) {
626            log.error(e);
627            facesMessages.add(StatusMessage.Severity.ERROR, messages.get("workflow.feedback.error.taskEnded"));
628        }
629        return null;
630    }
631
632    /**
633     * @since 5.8
634     */
635    public String navigateToTask(DocumentModel taskDoc) {
636        setCurrentTask(taskDoc.getAdapter(Task.class));
637        return null;
638    }
639
640    /**
641     * @since 5.8
642     */
643    public String navigateToTasksView() {
644        setCurrentTask(null);
645        return null;
646    }
647
648    /**
649     * @since 5.8
650     */
651    public Task getCurrentTask() {
652        return currentTask;
653    }
654
655    /**
656     * @since 5.8
657     */
658    public void setCurrentTask(Task currentTask) {
659        this.currentTask = currentTask;
660    }
661
662    /**
663     * Added to avoid an error when opening a task created @before 5.8 see NXP-14047
664     *
665     * @since 5.9.3, 5.8.0-HF10
666     * @return
667     */
668    @SuppressWarnings("deprecation")
669    public List<String> getCurrentTaskTargetDocumentsIds() {
670        Set<String> uniqueTargetDocIds = new HashSet<String>();
671        List<String> docIds = new ArrayList<String>();
672        if (currentTask == null) {
673            return docIds;
674        }
675        uniqueTargetDocIds.addAll(currentTask.getTargetDocumentsIds());
676        docIds.addAll(uniqueTargetDocIds);
677        return docIds.isEmpty() ? null : docIds;
678    }
679
680    /**
681     * @since 5.8 - Define if action reassign task can be displayed.
682     */
683    public boolean canBeReassign() {
684        if (currentTask == null) {
685            return false;
686        }
687        DocumentModel workflowInstance = documentManager.getDocument(new IdRef(currentTask.getProcessId()));
688        GraphRoute workflow = workflowInstance.getAdapter(GraphRoute.class);
689        if (workflow == null) {
690            return false;
691        }
692        GraphNode node = workflow.getNode(currentTask.getType());
693        return node.allowTaskReassignment() && !currentTask.getDelegatedActors().contains(documentManager.getPrincipal().getName());
694    }
695}