[jira] [Commented] (BEAM-2123) Passing potential null pointer to encode() in StructuredCoder#structuralValue

["Daniel Halperin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-2123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15990311#comment-15990311 ] 

Daniel Halperin commented on BEAM-2123:
---------------------------------------

It looks like you believe `null` is not a valid value for any structured coder. Is that actually true? I don't believe so.

It's up to the extending coder to throw on `null` values.

> Passing potential null pointer to encode() in StructuredCoder#structuralValue
> -----------------------------------------------------------------------------
>
>                 Key: BEAM-2123
>                 URL: https://issues.apache.org/jira/browse/BEAM-2123
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-core
>            Reporter: Ted Yu
>            Assignee: Thomas Groh
>            Priority: Minor
>
> {code}
>   public Object structuralValue(T value) {
>     if (value != null && consistentWithEquals()) {
>       return value;
>     } else {
>       try {
>         ByteArrayOutputStream os = new ByteArrayOutputStream();
>         encode(value, os, Context.OUTER);
> {code}
> If value is null, encode() would throw CoderException (I checked ByteArrayCoder and KvCoder) which would be caught and converted to IllegalArgumentException.
> Looks like structuralValue() can check null value directly and throw CoderException. This would result in clearer exception.



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