Github user zsxwing commented on the issue:
https://github.com/apache/spark/pull/17209
Could you add a utility method like this?
```
def getKafkaOffsetRangeLimit(
params: Map[String, String],
key: String,
default: KafkaOffsetRangeLimit) : KafkaOffsetRangeLimit = {
params.get(key).map(_.trim) match {
case Some(offset) if offset.toLowerCase == "latest" =>
LatestOffsetRangeLimit
case Some(offset) if offset.toLowerCase == "earliest" =>
EarliestOffsetRangeLimit
case Some(json) =>
SpecificOffsetRangeLimit(JsonUtils.partitionOffsets(json))
case None => default
}
}
```
Then you can reuse the method and only test it, e.g.,
```
val startingOffsets = getKafkaOffsetRangeLimit(
caseInsensitiveParams,
STARTING_OFFSETS_OPTION_KEY,
EarliestOffsetRangeLimit
)
// Batch specific options
startingOffsets match {
case EarliestOffsetRangeLimit => // good to go
case LatestOffsetRangeLimit =>
throw new IllegalArgumentException("starting offset can't be latest
" +
"for batch queries on Kafka")
case SpecificOffsetRangeLimit(partitionOffsets) =>
partitionOffsets.foreach {
case (tp, off) if off == KafkaOffsetRangeLimit.LATEST =>
throw new IllegalArgumentException(s"startingOffsets for $tp
can't " +
"be latest for batch queries on Kafka")
case _ => // ignore
}
}
```
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