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

Class UnaryTransformer

java.lang.Object

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

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

All Implemented Interfaces:

LayerPointReader, YieldableReader

Direct Known Subclasses:

ArithmeticNegationTransformer, InTransformer, IsNullTransformer, LogicNotTransformer, RegularTransformer, TransparentTransformer

public abstract class UnaryTransformer
extends Transformer

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	isLayerPointReaderConstant
protected LayerPointReader	layerPointReader
protected org.apache.iotdb.tsfile.file.metadata.enums.TSDataType	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
UnaryTransformer(LayerPointReader layerPointReader)

Method Summary

Modifier and Type	Method	Description
protected boolean	cacheValue()	if this method returns true, at least one of the cached field should be set
boolean	isConstantPointReader()
protected abstract 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.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

Methods inherited from interface org.apache.iotdb.db.mpp.transformation.api.LayerPointReader

getDataType

Field Detail

layerPointReader

protected final LayerPointReader layerPointReader

layerPointReaderDataType

protected final org.apache.iotdb.tsfile.file.metadata.enums.TSDataType layerPointReaderDataType

isLayerPointReaderConstant

protected final boolean isLayerPointReaderConstant

Constructor Detail

UnaryTransformer

public UnaryTransformer(LayerPointReader layerPointReader)

Method Detail

isConstantPointReader

public final boolean isConstantPointReader()

yieldValue

public 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

Specified by:

yieldValue in class Transformer

Throws:

java.io.IOException

QueryProcessException

cacheValue

protected final boolean cacheValue()
                            throws QueryProcessException,
                                   java.io.IOException

Description copied from class: Transformer

if this method returns true, at least one of the cached field should be set

Specified by:

cacheValue in class Transformer

Throws:

QueryProcessException

java.io.IOException

transformAndCache

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

Throws:

QueryProcessException

java.io.IOException