[infinispan-issues] [JBoss JIRA] Created: (ISPN-857) Favour Externalizer method implementations over @Marshalls annotation values

[Galder Zamarreño (JIRA)]

Favour Externalizer method implementations over @Marshalls annotation values
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                 Key: ISPN-857
                 URL: https://issues.jboss.org/browse/ISPN-857
             Project: Infinispan
          Issue Type: Bug
          Components: Marshalling
    Affects Versions: 5.0.0.ALPHA1
            Reporter: Galder Zamarreño
            Assignee: Galder Zamarreño
             Fix For: 5.0.0.BETA1


Enhance Externalizer interface with methods for getTypeClasses(), getTypeClassNames() and getId() in favour of annotations.

The reason for doing this is twofold:
- The use of annotations makes it difficult for other apps to abstract the externalizer framework.
- Runtime errors not caught at compilation time could arise from code like this where X and Y have no relationship:

@Marshalls(typeClasses = Y.class, id = ExternalizerIds.XExternalizer)
public class XExternalizer implements
		Externalizer<X> {


In particular, code like this would maintain guarantees between classes externalized and return of readObject(): 

List<Class<? extends T>> getTypeClasses();

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