了解传统的grails代码吗？

Question

The following is a chunk of code in setUp method of controller unit test class in grails. I am trying to understand the purpose of the following setup code. The application has a TimeService which is responsible for doing time operations. I appreciate any help!

def customPropertyEditor = new CustomPropertyEditorRegistrar(timeService: new TimeService())

def map = (Map<String, PropertyEditorRegistrar>) servletContext.getAttribute(GrailsDataBinder.PROPERTY_EDITOR_REGISTRARS)
        if (!map) servletContext.setAttribute(GrailsDataBinder.PROPERTY_EDITOR_REGISTRARS, [customPropertyEditor: customPropertyEditor])
        else map.put('customPropertyEditor', customPropertyEditor)

Answer 1

Create this TimeService object that is customPropertyEditor

def customPropertyEditor = new CustomPropertyEditorRegistrar(timeService: new TimeService())

Make a map out of servletContext.getAttribute(GrailsDataBinder.PROPERTY_EDITOR_REGISTRARS

def map = (Map<String, PropertyEditorRegistrar>) servletContext.getAttribute(GrailsDataBinder.PROPERTY_EDITOR_REGISTRARS)

if (!map) = If no map found = as in null due to no results

Then set servletContext.setAttribute(GrailsDataBinder.PROPERTY_EDITOR_REGISTRARS to be the object at the top customPropertyEditor

servletContext.setAttribute(GrailsDataBinder.PROPERTY_EDITOR_REGISTRARS, [customPropertyEditor: customPropertyEditor])

If there was a map put in the map customPropertyEditor this value

    else map.put('customPropertyEditor', customPropertyEditor)

As for what GrailsDataBinder is doing as Servlet Attribute have a search for it in the code base to see what other things are interacting

Answer 2

ok i found that this chunk of code is responsible for making it so that date binds well. Apparently, there is no clean method to bind date in grails 2.2.