Ivan Greene created AVRO-2357:
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Summary: (ReflectData) Support for generic types in protocol
definitions
Key: AVRO-2357
URL: https://issues.apache.org/jira/browse/AVRO-2357
Project: Apache Avro
Issue Type: Improvement
Components: java
Reporter: Ivan Greene
For a Java interface extending another interface with type parameters, we may
resolve actual type parameters and build the protocol definition based upon
those.
For example, let's say we have a generic protocol defined by a Java interface:
{code:java}
public interface CrudProto<T, I> {
void persist(T record);
T fetchById(I id);
}{code}
It would be natural to define a set of interfaces that extend this, such as:
{code:java}
public interface FooBarRecordProto extends CrudProto<FooBarRecord, String> {}
public interface OtherRecordProto extends CrudProto<OtherRecord, Long> {}
{code}
Calling ReflectData.get().getProtocol(FooBarRecordProto.class) should be able
to resolve that this protocol deals in FooBarRecords and Strings, and build a
protocol accordingly.
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