Java 如何访问流之外的 Spring Webflow FlowScope 元素？
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How can I access Spring Webflow FlowScope elements outside the flow?
提问by user3120173
EDIT: I didn't get any bites on this question, so I'm adding a little more detail.
编辑：我对这个问题没有任何意见，所以我添加了更多细节。
I have a Spring Webflow app (ver 2.3.2). I need to access multiple FlowScope objects from inside the validation of one of the steps (not inside the flow itself). You would think this would be simple, but I haven't been able to crack it.
我有一个 Spring Webflow 应用程序（版本 2.3.2）。我需要从其中一个步骤的验证内部（而不是在流程本身内部）访问多个 FlowScope 对象。你会认为这很简单，但我一直无法破解它。
Spring Webflow provides a series of special EL variableswhich can be used for accessing the various scopes, but only insidethe flow itself. Inside a custom Spring validator, there doesn't seem to be any way to get to them:
Spring Webflow 提供了一系列特殊的 EL 变量，可用于访问各种范围，但只能在流本身内部使用。在自定义 Spring 验证器中，似乎没有任何方法可以访问它们：
@Component
public class MyObjectValidator {
@Autowired
ApplicationContext context;
public void validateMyObject(MyObject myObject, Errors errors) {
FlowScope flowScope = context.someMagicFunction(); // <---- UNKNOWN
MyOtherObject otherObject = flowScope.get("otherObject");
if (incrediblyComplexValidation(myObject, otherObject) {
errors.rejectValue("myField","validation.fail","Your object failed validation.");
}
}
}
As you can see, inside a Spring Webflow Validatorthere is no direct external linkage to anything except the object you are supposed to validate. I need to get to those other objects in the flowScope. Ideally either through the ApplicationContextor some other environmental feature there must be a way to get to these other objects.
如您所见，在Spring Webflow Validator 中，除了您应该验证的对象之外，没有与任何内容的直接外部链接。我需要访问 flowScope 中的其他对象。理想情况下，无论是通过ApplicationContext还是其他一些环境特征，都必须有一种方法可以到达这些其他对象。
Anyone know the answer to this?
有谁知道这个问题的答案吗？
采纳答案by Prasad
You can get the scope beans from RequestContext - context holder for request-specific statecurrent web application context. Access to request context in your validator method is by:
您可以从 RequestContext 获取范围 bean - 请求特定状态当前 Web 应用程序上下文的上下文持有者。通过以下方式访问验证器方法中的请求上下文：
import org.springframework.webflow.execution.RequestContext;
import org.springframework.webflow.execution.RequestContextHolder;
RequestContext requestContext = RequestContextHolder.getRequestContext();
requestContext.getFlowScope().get("objectYouAreLookingFor");
