Package org.apache.druid.query.operator
Class OperatorSequence
- java.lang.Object
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- org.apache.druid.query.operator.OperatorSequence
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- All Implemented Interfaces:
Sequence<RowsAndColumns>
public class OperatorSequence extends Object implements Sequence<RowsAndColumns>
Provides a sequence on top of Operators.
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Constructor Summary
Constructors Constructor Description OperatorSequence(Supplier<Operator> opSupplier)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description <OutType> OutType
accumulate(OutType initValue, Accumulator<OutType,RowsAndColumns> accumulator)
Accumulate this sequence using the given accumulator.<OutType> Yielder<OutType>
toYielder(OutType initValue, YieldingAccumulator<OutType,RowsAndColumns> accumulator)
Return a Yielder for accumulated sequence.
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Method Detail
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accumulate
public <OutType> OutType accumulate(OutType initValue, Accumulator<OutType,RowsAndColumns> accumulator)
Description copied from interface:Sequence
Accumulate this sequence using the given accumulator.- Specified by:
accumulate
in interfaceSequence<RowsAndColumns>
- Type Parameters:
OutType
- the type of accumulated value.- Parameters:
initValue
- the initial value to pass along to start the accumulation.accumulator
- the accumulator which is responsible for accumulating input values.- Returns:
- accumulated value.
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toYielder
public <OutType> Yielder<OutType> toYielder(OutType initValue, YieldingAccumulator<OutType,RowsAndColumns> accumulator)
Description copied from interface:Sequence
Return a Yielder for accumulated sequence.- Specified by:
toYielder
in interfaceSequence<RowsAndColumns>
- Type Parameters:
OutType
- the type of accumulated value.- Parameters:
initValue
- the initial value to pass along to start the accumulation.accumulator
- the accumulator which is responsible for accumulating input values.- Returns:
- a Yielder for accumulated sequence.
- See Also:
Yielder
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