[jira] [Assigned] (FLINK-9627) Extending 'KafkaJsonTableSource' according to comments will result in NPE

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

     [ https://issues.apache.org/jira/browse/FLINK-9627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

vinoyang reassigned FLINK-9627:
-------------------------------

    Assignee: vinoyang

> Extending 'KafkaJsonTableSource' according to comments will result in NPE
> -------------------------------------------------------------------------
>
>                 Key: FLINK-9627
>                 URL: https://issues.apache.org/jira/browse/FLINK-9627
>             Project: Flink
>          Issue Type: Bug
>    Affects Versions: 1.5.0
>            Reporter: Dominik Wosiński
>            Assignee: vinoyang
>            Priority: Major
>
> According to the comments what is needed to extend the 'KafkaJsonTableSource' looks as follows:
>  
> {code:java}
> A version-agnostic Kafka JSON {@link StreamTableSource}.
> *
> * <p>The version-specific Kafka consumers need to extend this class and
> * override {@link #createKafkaConsumer(String, Properties, DeserializationSchema)}}.
> *
> * <p>The field names are used to parse the JSON file and so are the types.{code}
> This will cause an NPE, since there is no default value for startupMode in the abstract class itself only in the builder of this class. 
> For the 'getKafkaConsumer' method the switch statement will be executed on non-initialized 'startupMode' field:
> {code:java}
> switch (startupMode) {
> case EARLIEST:
> kafkaConsumer.setStartFromEarliest();
> break;
> case LATEST:
> kafkaConsumer.setStartFromLatest();
> break;
> case GROUP_OFFSETS:
> kafkaConsumer.setStartFromGroupOffsets();
> break;
> case SPECIFIC_OFFSETS:
> kafkaConsumer.setStartFromSpecificOffsets(specificStartupOffsets);
> break;
> }{code}
>  
>  



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