[jira] [Created] (BEAM-790) Validate PipelineOptions Default annotation

["Pei He (JIRA)" <ji...@apache.org>]

Pei He created BEAM-790:
---------------------------

             Summary: Validate PipelineOptions Default annotation
                 Key: BEAM-790
                 URL: https://issues.apache.org/jira/browse/BEAM-790
             Project: Beam
          Issue Type: Improvement
          Components: sdk-java-core
            Reporter: Pei He
            Assignee: Pei He


It shouldn't allow @Override with @Default annotation, for example the following is broken:
interface A {
  @Default.Integer(1)
  Integer getFoo();
  void setFoo();
}

interface B extends A {
  @Default.Integer(-1)
  @Override
  Integer getFoo();
}

It is broken, because PipelineOptions default values are lazily evaluated. And, it will depends on which one of the two following operations happen first:
options.as(A.class) and options.as(B.class)

If users want to change the default value, users should do setFoo(...) explicitly.

It shouldn't allow adding Default annotation as well.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)