public static final class SplitCombiner.Util extends Object
SplitCombiner
.Modifier and Type | Method and Description |
---|---|
static Map<Class<? extends org.apache.hadoop.mapreduce.Mapper<?,?,?,?>>,List<StageInputSplit.Source>> |
groupByMapper(List<StageInputSplit> splits)
Groups
StageInputSplit s by their own Mapper class. |
public static Map<Class<? extends org.apache.hadoop.mapreduce.Mapper<?,?,?,?>>,List<StageInputSplit.Source>> groupByMapper(List<StageInputSplit> splits)
StageInputSplit
s by their own Mapper
class.splits
- target input splitsIllegalArgumentException
- if some parameters were null
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