Java tutorial
/* Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.flowable.app.service.runtime; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.commons.lang3.StringUtils; import org.apache.commons.lang3.math.NumberUtils; import org.flowable.app.model.runtime.TaskRepresentation; import org.flowable.app.service.api.UserCache; import org.flowable.app.service.idm.RemoteIdmService; import org.flowable.bpmn.model.BpmnModel; import org.flowable.bpmn.model.ExtensionElement; import org.flowable.bpmn.model.FlowElement; import org.flowable.bpmn.model.UserTask; import org.flowable.editor.language.json.converter.util.CollectionUtils; import org.flowable.engine.HistoryService; import org.flowable.engine.RepositoryService; import org.flowable.engine.TaskService; import org.flowable.engine.history.HistoricProcessInstance; import org.flowable.engine.history.HistoricVariableInstance; import org.flowable.engine.task.TaskInfo; import org.flowable.idm.api.Group; import org.flowable.idm.api.User; import org.springframework.beans.factory.annotation.Autowired; public abstract class FlowableAbstractTaskService { @Autowired protected RemoteIdmService remoteIdmService; @Autowired protected HistoryService historyService; @Autowired protected RepositoryService repositoryService; @Autowired protected TaskService taskService; @Autowired protected UserCache userCache; @Autowired protected PermissionService permissionService; public void fillPermissionInformation(TaskRepresentation taskRepresentation, TaskInfo task, User currentUser) { String processInstanceStartUserId = null; boolean initiatorCanCompleteTask = true; boolean isMemberOfCandidateGroup = false; boolean isMemberOfCandidateUsers = false; if (task.getProcessInstanceId() != null) { HistoricProcessInstance historicProcessInstance = historyService.createHistoricProcessInstanceQuery() .processInstanceId(task.getProcessInstanceId()).singleResult(); if (historicProcessInstance != null && StringUtils.isNotEmpty(historicProcessInstance.getStartUserId())) { processInstanceStartUserId = historicProcessInstance.getStartUserId(); BpmnModel bpmnModel = repositoryService.getBpmnModel(task.getProcessDefinitionId()); FlowElement flowElement = bpmnModel.getFlowElement(task.getTaskDefinitionKey()); if (flowElement instanceof UserTask) { UserTask userTask = (UserTask) flowElement; List<ExtensionElement> extensionElements = userTask.getExtensionElements() .get("initiator-can-complete"); if (CollectionUtils.isNotEmpty(extensionElements)) { String value = extensionElements.get(0).getElementText(); if (StringUtils.isNotEmpty(value)) { initiatorCanCompleteTask = Boolean.valueOf(value); } } Map<String, Object> variableMap = new HashMap<String, Object>(); if ((CollectionUtils.isNotEmpty(userTask.getCandidateGroups()) && userTask.getCandidateGroups().size() == 1 && userTask.getCandidateGroups().get(0) .contains("${taskAssignmentBean.assignTaskToCandidateGroups('")) || (CollectionUtils.isNotEmpty(userTask.getCandidateUsers()) && userTask.getCandidateUsers().size() == 1 && userTask.getCandidateUsers().get(0) .contains("${taskAssignmentBean.assignTaskToCandidateUsers('"))) { List<HistoricVariableInstance> processVariables = historyService .createHistoricVariableInstanceQuery() .processInstanceId(task.getProcessInstanceId()).list(); if (CollectionUtils.isNotEmpty(processVariables)) { for (HistoricVariableInstance historicVariableInstance : processVariables) { variableMap.put(historicVariableInstance.getVariableName(), historicVariableInstance.getValue()); } } } if (CollectionUtils.isNotEmpty(userTask.getCandidateGroups())) { List<? extends Group> groups = remoteIdmService.getUser(currentUser.getId()).getGroups(); if (CollectionUtils.isNotEmpty(groups)) { List<String> groupIds = new ArrayList<String>(); if (userTask.getCandidateGroups().size() == 1 && userTask.getCandidateGroups().get(0) .contains("${taskAssignmentBean.assignTaskToCandidateGroups('")) { String candidateGroupString = userTask.getCandidateGroups().get(0); candidateGroupString = candidateGroupString .replace("${taskAssignmentBean.assignTaskToCandidateGroups('", ""); candidateGroupString = candidateGroupString.replace("', execution)}", ""); String groupsArray[] = candidateGroupString.split(","); for (String group : groupsArray) { if (group.contains("field(")) { String fieldCandidate = group.trim().substring(6, group.length() - 1); Object fieldValue = variableMap.get(fieldCandidate); if (fieldValue != null && NumberUtils.isNumber(fieldValue.toString())) { groupIds.add(fieldValue.toString()); } } else { groupIds.add(group); } } } else { groupIds.addAll(userTask.getCandidateGroups()); } for (Group group : groups) { if (groupIds.contains(String.valueOf(group.getId()))) { isMemberOfCandidateGroup = true; break; } } } } if (CollectionUtils.isNotEmpty(userTask.getCandidateUsers())) { if (userTask.getCandidateUsers().size() == 1 && userTask.getCandidateUsers().get(0) .contains("${taskAssignmentBean.assignTaskToCandidateUsers('")) { String candidateUserString = userTask.getCandidateUsers().get(0); candidateUserString = candidateUserString .replace("${taskAssignmentBean.assignTaskToCandidateUsers('", ""); candidateUserString = candidateUserString.replace("', execution)}", ""); String users[] = candidateUserString.split(","); for (String user : users) { if (user.contains("field(")) { String fieldCandidate = user.substring(6, user.length() - 1); Object fieldValue = variableMap.get(fieldCandidate); if (fieldValue != null && NumberUtils.isNumber(fieldValue.toString()) && String.valueOf(currentUser.getId()).equals(fieldValue.toString())) { isMemberOfCandidateGroup = true; break; } } else if (user.equals(String.valueOf(currentUser.getId()))) { isMemberOfCandidateGroup = true; break; } } } else if (userTask.getCandidateUsers().contains(String.valueOf(currentUser.getId()))) { isMemberOfCandidateUsers = true; } } } } } taskRepresentation.setProcessInstanceStartUserId(processInstanceStartUserId); taskRepresentation.setInitiatorCanCompleteTask(initiatorCanCompleteTask); taskRepresentation.setMemberOfCandidateGroup(isMemberOfCandidateGroup); taskRepresentation.setMemberOfCandidateUsers(isMemberOfCandidateUsers); } }