在运行时获取JSF中所有托管Bean的列表 [英] Get List of All Managed Beans in JSF at runtime

问题描述

我想获得JSF应用程序中所有托管bean的列表。在Spring中，我可以执行 context.getBeansOfType（）之类的操作。 JSF中是否有相应的方法？

I'd like to get a list of all managed beans in a JSF application. In Spring, I can do something like context.getBeansOfType(). Is there a corresponding method in JSF?

我有一些实现接口的 @ManagedProperty bean。我想获取这些适配器的列表并循环遍历它们，而不是显式调用每个bean以保持代码清洁。

I have a number of @ManagedProperty beans that implement an interface. I'd like to get a list of these adapters and loop through them rather than invoke each bean explicitly in order to keep the code clean.

谢谢

推荐答案

您可以使用 com中的 BeanManager 类来完成此操作。 sun.faces.mgbean package：

You can do this with BeanManager class from com.sun.faces.mgbean package:

ApplicationAssociate application = ApplicationAssociate.getInstance(FacesContext.getCurrentInstance().getExternalContext());
BeanManager beanManager = application.getBeanManager();
Map<String, BeanBuilder> beanMap = beanManager.getRegisteredBeans();
Set<Entry<String, BeanBuilder>>beanEntries = beanMap.entrySet();

for (Entry<String, BeanBuilder> bean: beanEntries) {
  String beanName = bean.getKey();
  if (beanManager.isManaged(beanName)) {
    BeanBuilder builder = bean.getValue();
    System.out.println("Bean name: " + beanName);
    System.out.println("Bean class: " + builder.getBeanClass());
    System.out.println("Bean scope: " + builder.getScope());
  }
}

注意：这是与Mojarra JSF实现紧密结合，不适用于其他实现。

NOTE: This is tightly coupled with Mojarra JSF implementation and doesn't work on other implementations.

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