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Activiti 歷史流程圖高亮顯示

package com.test;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.activiti.bpmn.model.BpmnModel;
import org.activiti.engine.HistoryService;
import org.activiti.engine.ProcessEngineConfiguration;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.history.HistoricActivityInstance;
import org.activiti.engine.history.HistoricDetail;
import org.activiti.engine.history.HistoricProcessInstance;
import org.activiti.engine.history.HistoricTaskInstance;
import org.activiti.engine.history.HistoricVariableUpdate;
import org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
import org.activiti.engine.impl.persistence.entity.ProcessDefinitionEntity;
import org.activiti.engine.impl.pvm.PvmTransition;
import org.activiti.engine.impl.pvm.process.ActivityImpl;
import org.activiti.image.ProcessDiagramGenerator;
import org.activiti.spring.ProcessEngineFactoryBean;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
@RequestMapping(value = "/ViewPorcess")
public class ViewPorcessAction {
   @Autowired
   RepositoryService repositoryService;
   @Autowired
   protected RuntimeService runtimeService;
   @Autowired
   ProcessEngineConfiguration processEngineConfiguration;
   @Autowired
   ProcessEngineFactoryBean processEngine;
   @Autowired
   HistoryService historyService;
   @Autowired
   TaskService taskService;
   
   /**
    * 讀取帶跟蹤的圖片
    */
   @RequestMapping("/view.do")
   public void test(HttpServletResponse response,@RequestParam("processInstanceId") String processInstanceId) throws Exception {
       //獲取歷史流程例項
       HistoricProcessInstance processInstance =  historyService.createHistoricProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
       //獲取流程圖
       BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId());
       processEngineConfiguration = processEngine.getProcessEngineConfiguration();
       Context.setProcessEngineConfiguration((ProcessEngineConfigurationImpl) processEngineConfiguration);

       ProcessDiagramGenerator diagramGenerator = processEngineConfiguration.getProcessDiagramGenerator();
       ProcessDefinitionEntity definitionEntity = (ProcessDefinitionEntity)repositoryService.getProcessDefinition(processInstance.getProcessDefinitionId());

       List<HistoricActivityInstance> highLightedActivitList =  historyService.createHistoricActivityInstanceQuery().processInstanceId(processInstanceId).list();
       //高亮環節id集合
       List<String> highLightedActivitis = new ArrayList<String>();
       //高亮線路id集合
       List<String> highLightedFlows = getHighLightedFlows(definitionEntity,highLightedActivitList);

      /* for(HistoricActivityInstance tempActivity : highLightedActivitList){
           String activityId = tempActivity.getActivityId();
           highLightedActivitis.add(activityId);
       }*/
       //當前流程例項執行到哪個節點
ExecutionEntity execution = (ExecutionEntity) runtimeService.createExecutionQuery().executionId(processInstanceId).singleResult();// 執行例項
       highLightedActivitis.add(execution.getActivityId());

       //中文顯示的是口口口,設定字型就好了
       InputStream imageStream = diagramGenerator.generateDiagram(bpmnModel, "png", highLightedActivitis,highLightedFlows,"宋體","宋體",null,1.0);
       //單獨返回流程圖,不高亮顯示
//       InputStream imageStream = diagramGenerator.generatePngDiagram(bpmnModel);
       // 輸出資源內容到相應物件
       byte[] b = new byte[1024];
       int len;
       while ((len = imageStream.read(b, 0, 1024)) != -1) {
           response.getOutputStream().write(b, 0, len);
       }
       
   }

   /**
    * 獲取需要高亮的線
    * @param processDefinitionEntity
    * @param historicActivityInstances
    * @return
    */
   private List<String> getHighLightedFlows(
           ProcessDefinitionEntity processDefinitionEntity,
           List<HistoricActivityInstance> historicActivityInstances) {
       List<String> highFlows = new ArrayList<String>();// 用以儲存高亮的線flowId
       for (int i = 0; i < historicActivityInstances.size() - 1; i++) {// 對歷史流程節點進行遍歷
           ActivityImpl activityImpl = processDefinitionEntity
                   .findActivity(historicActivityInstances.get(i)
                           .getActivityId());// 得到節點定義的詳細資訊
           List<ActivityImpl> sameStartTimeNodes = new ArrayList<ActivityImpl>();// 用以儲存後需開始時間相同的節點
           ActivityImpl sameActivityImpl1 = processDefinitionEntity
                   .findActivity(historicActivityInstances.get(i + 1)
                           .getActivityId());
           // 將後面第一個節點放在時間相同節點的集合裡
           sameStartTimeNodes.add(sameActivityImpl1);
           for (int j = i + 1; j < historicActivityInstances.size() - 1; j++) {
               HistoricActivityInstance activityImpl1 = historicActivityInstances
                       .get(j);// 後續第一個節點
               HistoricActivityInstance activityImpl2 = historicActivityInstances
                       .get(j + 1);// 後續第二個節點
               if (activityImpl1.getStartTime().equals(
                       activityImpl2.getStartTime())) {
                   // 如果第一個節點和第二個節點開始時間相同儲存
                   ActivityImpl sameActivityImpl2 = processDefinitionEntity
                           .findActivity(activityImpl2.getActivityId());
                   sameStartTimeNodes.add(sameActivityImpl2);
               } else {
                   // 有不相同跳出迴圈
                   break;
               }
           }
           List<PvmTransition> pvmTransitions = activityImpl
                   .getOutgoingTransitions();// 取出節點的所有出去的線
           for (PvmTransition pvmTransition : pvmTransitions) {
               // 對所有的線進行遍歷
               ActivityImpl pvmActivityImpl = (ActivityImpl) pvmTransition
                       .getDestination();
               // 如果取出的線的目標節點存在時間相同的節點裡,儲存該線的id,進行高亮顯示
               if (sameStartTimeNodes.contains(pvmActivityImpl)) {
                   highFlows.add(pvmTransition.getId());
               }
           }
       }
       return highFlows;
   }
       
}