各个模块只需要添加一个业务类，继承IBusiEntityViewerProvider接口即可
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具体实现方式
1.根据流程id获取业务对象的实体类(SWF_PROC_BUSI_ENTITY)，SWF_PROC_BUSI_ENTITY表中entityId为实现类主键id，entityName为路径，procId为流程id
@RequestMapping({"/getViewerProvider"})
@ResponseBody
public OperResult<?> getViewerProvider(String procId)
{
String webPageUrl = "";
List list = this.wfProcBusiEntityService.getByProcId(procId);
if ((list != null) && (list.size() > 0)) {
WfProcBusiEntity entity = (WfProcBusiEntity)list.get(0);
if (entity != null) {
webPageUrl = CommonUtil.trim(EIPService.getBusiEntityService().getViewerUrl(entity.getDbYear(), entity.getEntityName(), entity.getEntityId()));//根据entityName获取具体url
}
}
return OperResult.succeed("200", "ok", webPageUrl);
}
根据具体的实体类名与所有实现类中获取的实体类名称是否一致，来确定具体执行哪个实现类
获取具体url
public String getViewerUrl(int budgetYear, String busiEntityClassName, Object busiEntityId) {
String getViewerUrl = busiEntityViewerService.getViewerUrl(budgetYear, busiEntityClassName, busiEntityId);
return getViewerUrl;
}
this.getProvider(busiEntityClassName)是具体的实现类
public String getViewerUrl(int budgetYear, String busiEntityClassName, Object busiEntityId) {
busiEntityClassName = CommonUtil.trim(busiEntityClassName);
if (busiEntityClassName.length() == 0) {
EIPService.getLogService().error("busiEntityClassName is empty.");
return null;
}
IBusiEntityViewerProvider provider = this.getProvider(busiEntityClassName);
if (provider == null) {
EIPService.getLogService().error("no IBusiEntityViewerProvider instance found for: " + busiEntityClassName);
return null;
}
return provider.getViewerUrl(budgetYear, busiEntityId);
}
viewerProviderBeans为缓存
private Map < String , IBusiEntityViewerProvider > viewerProviderBeans = null;
public IBusiEntityViewerProvider getProvider(String providerId) {
providerId = CommonUtil.trim(providerId);
if (providerId.length() == 0) {
EIPService.getLogService().error("providerId is null.");
return null;
}
if (viewerProviderBeans == null) getProviderBeans();
if (!viewerProviderBeans.containsKey(providerId)) {
//传过来的可能是实体类，也可能是domainObjectId，判断一下，试试看另一个是否存在？
boolean isClassName = false;
if (providerId.indexOf(".") > 0) {
try {
Class < ? > clazz = Class.forName(providerId);
if (clazz != null) {
isClassName = true;
} else {
isClassName = false;
}
} catch (ClassNotFoundException e) {
isClassName = false;
}
}
if (!isClassName) {
//providerId不是类名，那么它是domainObjectId吗？
IDomainObject domainObject = EIPService.getModuleService().getDomainObject(providerId);
if (domainObject != null) {
//说明providerId是一个domainObjectId，既然viewerProviderBeans中没有按domainObjectId标识的viewerProvider，那么试试看对应的主表类名
List < IDomainObjectTable > tables = domainObject.getTables();
if (tables != null) {
for (IDomainObjectTable table : tables) {
if (table.getRelationType() != IDomainObjectTable.RelationType.MASTER) continue;
String masterClassName = CommonUtil.trim(table.getClassName());
if (viewerProviderBeans.containsKey(masterClassName)) {
//找到了根据主表类名标识的viewerProvider,那么加入map中
//这样viewerProviderBeans中就存在providerId标识的provider，下次就不用再提取一次了
IBusiEntityViewerProvider viewerProvider = viewerProviderBeans.get(masterClassName);
if (viewerProvider != null) viewerProviderBeans.put(providerId, viewerProvider);
}
}
}
}
}
}
if (!viewerProviderBeans.containsKey(providerId)) {
//throw new RuntimeException("no viewerProvider found for entityClass:" + entityName);
EIPService.getLogService().error("no viewerProvider found for entityClass:" + providerId);
return null;
}
IBusiEntityViewerProvider viewerProviderBean = viewerProviderBeans.get(providerId);
return viewerProviderBean;
}
获取所有实现类的bean，通过调用每个实现类中的getId()方法获取实体类的路径，用该路径与传过来的entityName比较来锁定具体的实现类
Map < String, IBusiEntityViewerProvider > beans = SpringContextHolder.getApplicationContext().getBeansOfType(IBusiEntityViewerProvider.class);//同个spring获取接口所有实现类的bean
private void getProviderBeans() {
viewerProviderBeans = new ConcurrentHashMap();
Map < String, IBusiEntityViewerProvider > beans = SpringContextHolder.getApplicationContext().getBeansOfType(IBusiEntityViewerProvider.class);
Set < String > keys = beans.keySet();
for (String key : keys) {
IBusiEntityViewerProvider viewerProvider = beans.get(key);
if (viewerProvider == null) continue;
String providerId = CommonUtil.trim(viewerProvider.getId());
//Class < ? > entityClass = viewerProvider.getEntityClass();
if (providerId.length() == 0) {
EIPService.getLogService().error("no entityClass is defined for bean:" + key + ":" + viewerProvider.getClass().getName());
continue;
}
viewerProviderBeans.put(providerId, viewerProvider);
}
}
最后接口初始化为具体的实现类，调用获取url的方法，便可获得实际url
IBusiEntityViewerProvider provider = this.getProvider(busiEntityClassName);
if (provider == null) {
EIPService.getLogService().error("no IBusiEntityViewerProvider instance found for: " + busiEntityClassName);
return null;
}
return provider.getViewerUrl(budgetYear, busiEntityId);
