Package org.apache.iotdb.db.mpp.transformation.dag.transformer.unary

Class IsNullTransformer

java.lang.Object

org.apache.iotdb.db.mpp.transformation.dag.transformer.Transformer

org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.UnaryTransformer

org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.IsNullTransformer

All Implemented Interfaces:

LayerPointReader, YieldableReader

public class IsNullTransformer
extends UnaryTransformer

Field Summary

Fields inherited from class org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.UnaryTransformer

isLayerPointReaderConstant, layerPointReader, layerPointReaderDataType

Fields inherited from class org.apache.iotdb.db.mpp.transformation.dag.transformer.Transformer

cachedBinary, cachedBoolean, cachedDouble, cachedFloat, cachedInt, cachedLong, cachedTime, currentNull, hasCachedValue

Constructor Summary

Constructors

Constructor	Description
IsNullTransformer(LayerPointReader layerPointReader, boolean isNot)

Method Summary

Modifier and Type	Method	Description
org.apache.iotdb.tsfile.file.metadata.enums.TSDataType	getDataType()
protected void	transformAndCache()
YieldableState	yieldValue()	if this method returns YieldableState.YIELDABLE, at least one of the cached field should be set

Methods inherited from class org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.UnaryTransformer

cacheValue, isConstantPointReader

Methods inherited from class org.apache.iotdb.db.mpp.transformation.dag.transformer.Transformer

currentBinary, currentBoolean, currentDouble, currentFloat, currentInt, currentLong, currentTime, isCurrentNull, next, readyForNext, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

IsNullTransformer

public IsNullTransformer(LayerPointReader layerPointReader,
                         boolean isNot)

Method Detail

getDataType

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

yieldValue

public final YieldableState yieldValue()
                                throws java.io.IOException,
                                       QueryProcessException

Description copied from class: Transformer

if this method returns YieldableState.YIELDABLE, at least one of the cached field should be set

Overrides:

yieldValue in class UnaryTransformer

Throws:

java.io.IOException

QueryProcessException

transformAndCache

protected void transformAndCache()
                          throws QueryProcessException,
                                 java.io.IOException

Specified by:

transformAndCache in class UnaryTransformer

Throws:

QueryProcessException

java.io.IOException