[jaxrs-dev] Another request for extension

[Ron Sigal <rsigal@xxxxxxxxxx>]

Nothing in the JAX-RS 2.1 spec says that 
javax.ws.rs.ext.RuntimeDelegate$HeaderDelegate is a provider, which 
means that there is no reason to expect that something like 
javax.ws.rs.core.Configurable.register(Class<?>) will work for a 
HeaderDelegate. Moreover, there is no compulsion to recognize a 
declaration of a HeaderDelegate in a 
META-INF/services/javax.ws.rs.ext.Providers file, or a definition of a 
HeaderDelegate annotated with @Provider.

It's much easier to register a HeaderDelegate if it is recognized as a 
provider. Moreover, Just as one might want to use an application 
specific MessageBodyReader, one might want to use an application 
specific header, so it makes sense to think of a HeaderDelegate as a 
provider.

-Ron

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