Conversion fails when generic type is an interface

Hi,

I am having problems populating an action variable Set by request using
struts type conversion if the Set has the element type defined as an
interface.
I have a UserAction-conversion.properties file with the following
configuration using the class implementation:

KeyProperty_roles=id
Element_roles=path.to.class.Roles
CreateIfNull_roles=true

And UserAction has the collection Set<RolesInterface>. Roles obviously
implements RolesInterface.

If the Set element type <RolesInterface> is deleted it works just fine.
Am I doing something wrong or is this not possible?

Thanks

I reproduced it and seems it's because it tries to instantiate a new
element but the interface cannot being instantiated. Please see [1] to
know why it tries to instantiate interface instead of class.

Annotating the getRoles or setRoles method with @Element(value =
path.to.class.Roles.class) may fix this issue. (shouldn't it be
path.to.class.Role instead? it seems Roles is a list not element)

Regards.

[1]
github.com/apache/struts/blob/05829e3faadd15cfa67eb234cd1775f2b98918cb/core/src/main/java/com/opensymphony/xwork2/conversion/impl/DefaultObjectTypeDeterminer.java#L100

You're welcome :) glad to hear this. However, I think it's better that
Struts honor .properties file (where element class has been defined
strictly by user) before the generic parametrics [1]. Could you please
register an issue at [2] with title "conversion fails when generic type
is an interface" then paste these emails contents in it's description.

Thanks for your report!

[1]
github.com/apache/struts/blob/05829e3faadd15cfa67eb234cd1775f2b98918cb/core/src/main/java/com/opensymphony/xwork2/conversion/impl/DefaultObjectTypeDeterminer.java#L100
[2] issues.apache.org/jira/projects/WW/