Thanks for your information.
My opinion: while being designed this way , it may just end up with an
error if there are fields with same name. Going on may cause serious
problem. Or it may be more compatible, maybe figure out a way to support
both flat model and hierarchy model.
Is there any other designed restrictions and any document about them : )
2014/1/8 Scott Ferguson <f...@caucho.com>
> On 1/7/14, 6:44 AM, yuneng xie wrote:
>
> Hello
>
> I encountered this problem that, after deserialization, a filed's value
> of a child class will be covered by the field's vlaue of its parent class,
> if the name of two fileds is the same.
>
> for example:
>
> class P{
> String str="parent";
> }
> class C extends P{
> String str="child;
> }
>
>
> After deserialization, C.str will be covered by P.str.
>
> I find the cause is that the _fieldMap structure in
> JavaDeserializer.java which is used to store all fields of the whole class
> hierarchy. The _fieldMap use field name as key. If there are two fields
> with same name in the class hierarchy, only one will be kept in the map.
>
> I tried to fix this by changing _fieldMap from Map<String,Field> to
> Map<String,List<Field>> and it worked fine for simple test. but I'm not
> sure if it will cause other problems.
>
> Anybody else ever encountered this problem?
>
>
> That's not actually a problem; it's part of the design of Hessian, because
> Hessian is designed to be cross-language, so it doesn't encode the entire
> class hierarchy, only the top class and its fields.
>
> So classes designed for Hessian serialization need to have unique field
> names.
>
> -- Scott
>
>
>
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