public InputStream generateDiagram(String processInstanceId) throws IOException {
HistoricProcessInstance historicProcessInstance =
Context.getCommandContext()
.getHistoricProcessInstanceEntityManager()
.findHistoricProcessInstance(processInstanceId);
String processDefinitionId = historicProcessInstance.getProcessDefinitionId();
GetBpmnModelCmd getBpmnModelCmd = new GetBpmnModelCmd(processDefinitionId);
BpmnModel bpmnModel = getBpmnModelCmd.execute(Context.getCommandContext());
Point point = getMinXAndMinY(bpmnModel);
this.minX = point.x;
this.minY = point.y;
this.minX = (this.minX <= 5) ? 5 : this.minX;
this.minY = (this.minY <= 5) ? 5 : this.minY;
this.minX -= 5;
this.minY -= 5;
ProcessDefinitionEntity definition =
new GetDeploymentProcessDefinitionCmd(processDefinitionId)
.execute(Context.getCommandContext());
String diagramResourceName = definition.getDiagramResourceName();
String deploymentId = definition.getDeploymentId();
byte[] bytes =
Context.getCommandContext()
.getResourceEntityManager()
.findResourceByDeploymentIdAndResourceName(deploymentId, diagramResourceName)
.getBytes();
InputStream originDiagram = new ByteArrayInputStream(bytes);
BufferedImage image = ImageIO.read(originDiagram);
HistoricActivityInstanceQueryImpl historicActivityInstanceQueryImpl =
new HistoricActivityInstanceQueryImpl();
historicActivityInstanceQueryImpl
.processInstanceId(processInstanceId)
.orderByHistoricActivityInstanceStartTime()
.asc();
Page page = new Page(0, 100);
List<HistoricActivityInstance> activityInstances =
Context.getCommandContext()
.getHistoricActivityInstanceEntityManager()
.findHistoricActivityInstancesByQueryCriteria(historicActivityInstanceQueryImpl, page);
this.drawHistoryFlow(image, processInstanceId);
for (HistoricActivityInstance historicActivityInstance : activityInstances) {
String historicActivityId = historicActivityInstance.getActivityId();
ActivityImpl activity = definition.findActivity(historicActivityId);
if (activity != null) {
if (historicActivityInstance.getEndTime() == null) {
// 节点正在运行中
signRunningNode(
image,
activity.getX() - this.minX,
activity.getY() - this.minY,
activity.getWidth(),
activity.getHeight(),
historicActivityInstance.getActivityType());
} else {
String deleteReason = null;
if (historicActivityInstance.getTaskId() != null) {
deleteReason =
Context.getCommandContext()
.getHistoricTaskInstanceEntityManager()
.findHistoricTaskInstanceById(historicActivityInstance.getTaskId())
.getDeleteReason();
}
// 节点已经结束
if ("跳过".equals(deleteReason)) {
signSkipNode(
image,
activity.getX() - this.minX,
activity.getY() - this.minY,
activity.getWidth(),
activity.getHeight(),
historicActivityInstance.getActivityType());
} else {
signHistoryNode(
image,
activity.getX() - this.minX,
activity.getY() - this.minY,
activity.getWidth(),
activity.getHeight(),
historicActivityInstance.getActivityType());
}
}
}
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
String formatName = getDiagramExtension(diagramResourceName);
ImageIO.write(image, formatName, out);
return new ByteArrayInputStream(out.toByteArray());
}
