@Documented
@Retention(value=RUNTIME)
@Target(value=TYPE)
public @interface DefaultCoder
DefaultCoder
annotation specifies a Coder
class to handle encoding and
decoding instances of the annotated class.
The specified Coder
must have the following method:
public static CoderProvider getCoderProvider()
.
Coders specified explicitly via PCollection.setCoder(org.apache.beam.sdk.coders.Coder<T>)
take precedence, followed by
Coders found at runtime via CoderRegistry.getCoder(java.lang.Class<T>)
. See CoderRegistry
for a more
detailed discussion of the precedence rules.
@CheckForNull public abstract java.lang.Class<? extends Coder> value