Package org.apache.iotdb.db.mpp.transformation.dag.input

Class ConstantInputReader

java.lang.Object

org.apache.iotdb.db.mpp.transformation.dag.input.ConstantInputReader

All Implemented Interfaces:

LayerPointReader, YieldableReader

public class ConstantInputReader
extends java.lang.Object
implements LayerPointReader

LayerPointReader for constants.

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.iotdb.tsfile.utils.Binary	cachedBinary
protected boolean	cachedBoolean
protected double	cachedDouble
protected float	cachedFloat
protected int	cachedInt
protected long	cachedLong

Constructor Summary

Constructors

Constructor	Description
ConstantInputReader(ConstantOperand expression)

Method Summary

Modifier and Type	Method	Description
org.apache.iotdb.tsfile.utils.Binary	currentBinary()
boolean	currentBoolean()
double	currentDouble()
float	currentFloat()
int	currentInt()
long	currentLong()
long	currentTime()
org.apache.iotdb.tsfile.file.metadata.enums.TSDataType	getDataType()
boolean	isConstantPointReader()
boolean	isCurrentNull()
boolean	next()
void	readyForNext()
YieldableState	yield()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

cachedInt

protected int cachedInt

cachedLong

protected long cachedLong

cachedFloat

protected float cachedFloat

cachedDouble

protected double cachedDouble

cachedBoolean

protected boolean cachedBoolean

cachedBinary

protected org.apache.iotdb.tsfile.utils.Binary cachedBinary

Constructor Detail

ConstantInputReader

public ConstantInputReader(ConstantOperand expression)
                    throws QueryProcessException

Throws:

QueryProcessException

Method Detail

isConstantPointReader

public boolean isConstantPointReader()

Specified by:

isConstantPointReader in interface LayerPointReader

yield

public YieldableState yield()

Specified by:

yield in interface YieldableReader

next

public boolean next()

Specified by:

next in interface LayerPointReader

readyForNext

public void readyForNext()

Specified by:

readyForNext in interface LayerPointReader

getDataType

public org.apache.iotdb.tsfile.file.metadata.enums.TSDataType getDataType()

Specified by:

getDataType in interface LayerPointReader

currentTime

public long currentTime()
                 throws java.io.IOException

Specified by:

currentTime in interface LayerPointReader

Throws:

java.io.IOException

currentInt

public int currentInt()
               throws java.io.IOException

Specified by:

currentInt in interface LayerPointReader

Throws:

java.io.IOException

currentLong

public long currentLong()
                 throws java.io.IOException

Specified by:

currentLong in interface LayerPointReader

Throws:

java.io.IOException

currentFloat

public float currentFloat()
                   throws java.io.IOException

Specified by:

currentFloat in interface LayerPointReader

Throws:

java.io.IOException

currentDouble

public double currentDouble()
                     throws java.io.IOException

Specified by:

currentDouble in interface LayerPointReader

Throws:

java.io.IOException

currentBoolean

public boolean currentBoolean()
                       throws java.io.IOException

Specified by:

currentBoolean in interface LayerPointReader

Throws:

java.io.IOException

currentBinary

public org.apache.iotdb.tsfile.utils.Binary currentBinary()
                                                   throws java.io.IOException

Specified by:

currentBinary in interface LayerPointReader

Throws:

java.io.IOException

isCurrentNull

public boolean isCurrentNull()

Specified by:

isCurrentNull in interface LayerPointReader