[resteasy-dev] Lambda question
This question arises in https://issues.jboss.org/browse/RESTEASY-1209
"org.jboss.resteasy.util.Types#getActualTypeArgumentsOfAnInterface not
working for lambda's." The reporter wants to do this:
ResteasyProviderFactory factory = new ResteasyProviderFactory();
factory.register((ContextResolver<String>) type -> "foo bar");
but it doesn't work. I find that if I do this:
ContextResolver<String> resolver1 = new
ContextResolver<String>() {
@Override
public String getContext(Class<?> type)
{
return null;
}
};
for (Type type : resolver1.getClass().getGenericInterfaces())
{
System.out.println(type);
}
I get
javax.ws.rs.ext.ContextResolver<java.lang.String>
but if I do
ContextResolver<String> resolver2 = type ->
"foo";
for (Type type : resolver2.getClass().getGenericInterfaces())
{
System.out.println(type);
}
I get
interface javax.ws.rs.ext.ContextResolver
Same with
ContextResolver<String> resolver2 =
((ContextResolver<String>)type -> "foo");
So, it seems that, for lambdas, Java doesn't keep the implementation
type and value of the type variable at run time. Does anyone have any
ideas or tricks?
Thanks,
Ron
--
My company's smarter than your company (unless you work for Red Hat)
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