Hello,
I am working on a web application and would like to send an array of
JSON-serialized objects to my Stripes application as a POST parameter and
have them be serialized into their Java counterparts. The parameter is
received by Stripes as
foos=[{"id":10,"name":"Name 1","description":"Description
1"},{"id":4,"name":"Name 2","description":"Description2"}]
In Java, I have a Foo class. In my ActionBean I have
public List<Foo> foos;
I've also written a FooTypeConverter, which works for a singular instance of
Foo, but I cannot for the life of me figure out how to handle a list. The
DefaultActionBeanPropertyBinder will send the entire value string to my
converter.
Here's what I have tried (in decreasing order of desperation):
- Custom TypeConverterFactory, a JsonTypeConverter to generically
handle JSON, and an annotation to denote fields that should be processed by
the JsonTypeConverter. However, the field is not sent to the
getTypeConverter only the type (List in this case), so I cannot see whether
it has been annotated and hence I never return the JsonTypeConverter
- Custom ActionBeanPropertyBinder to alter the HTTPRequest's
parameter map, then I remembered that the parameterMap is immutable.
- Changing my FooTypeConverter to handle a JSON array. However,
when I return a List of Foos, bindNonNullValue in the
DefaultActionBeanPropertyBinder fails when trying to set the value with an
EvaluationException ("could not write read-only property") even though the
field is public.
These are just my attempts that I got into testable shape; there were some
other really crazy ideas. J
So, does anyone have any insight into how to do this? Aside from changing
List<Foo> foos to String foos and parsing it post facto in my ActionBean
method. Should I just bite the bullet and write my own implementation of
ActionBeanPropertyBinder and have it check the parameter for JSON-ness and
process it, otherwise defer to the default property binder? I'm really
trying to play by the rules and plug into the Stripes architecture by doing
as little as possible, but this one really has me stumped.
I hope this makes sense; it's been a long frustrating day. Any insight would
be appreciated.
Best Regards,
Taylor
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