Package io.prestosql.operator
Class DevNullOperator
- java.lang.Object
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- io.prestosql.operator.DevNullOperator
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- All Implemented Interfaces:
Operator
,AutoCloseable
public class DevNullOperator extends Object implements Operator
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
DevNullOperator.DevNullOperatorFactory
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Field Summary
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Fields inherited from interface io.prestosql.operator.Operator
NOT_BLOCKED
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Constructor Summary
Constructors Constructor Description DevNullOperator(OperatorContext context)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addInput(Page page)
Adds an input page to the operator.void
finish()
Notifies the operator that no more pages will be added and the operator should finish processing and flush results.OperatorContext
getOperatorContext()
Page
getOutput()
Gets an output page from the operator.boolean
isFinished()
Is this operator completely finished processing and no more output pages will be produced.boolean
needsInput()
Returns true if and only if this operator can accept an input page.-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface io.prestosql.operator.Operator
close, finishMemoryRevoke, isBlocked, startMemoryRevoke
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Constructor Detail
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DevNullOperator
public DevNullOperator(OperatorContext context)
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Method Detail
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getOperatorContext
public OperatorContext getOperatorContext()
- Specified by:
getOperatorContext
in interfaceOperator
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needsInput
public boolean needsInput()
Description copied from interface:Operator
Returns true if and only if this operator can accept an input page.- Specified by:
needsInput
in interfaceOperator
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addInput
public void addInput(Page page)
Description copied from interface:Operator
Adds an input page to the operator. This method will only be called ifneedsInput()
returns true.
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getOutput
public Page getOutput()
Description copied from interface:Operator
Gets an output page from the operator. If no output data is currently available, return null.
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finish
public void finish()
Description copied from interface:Operator
Notifies the operator that no more pages will be added and the operator should finish processing and flush results. This method will not be called if the Task is already failed or canceled.
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isFinished
public boolean isFinished()
Description copied from interface:Operator
Is this operator completely finished processing and no more output pages will be produced.- Specified by:
isFinished
in interfaceOperator
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