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

Class TernaryTransformer

java.lang.Object

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

org.apache.iotdb.db.mpp.transformation.dag.transformer.ternary.TernaryTransformer

All Implemented Interfaces:

LayerPointReader, YieldableReader

Direct Known Subclasses:

CompareTernaryTransformer

public abstract class TernaryTransformer
extends Transformer

Field Summary

Fields

Modifier and Type	Field	Description
protected LayerPointReader	firstPointReader
protected org.apache.iotdb.tsfile.file.metadata.enums.TSDataType	firstPointReaderDataType
protected boolean	isCurrentConstant
protected boolean	isFirstPointReaderConstant
protected boolean	isSecondPointReaderConstant
protected boolean	isThirdPointReaderConstant
protected LayerPointReader	secondPointReader
protected org.apache.iotdb.tsfile.file.metadata.enums.TSDataType	secondPointReaderDataType
protected LayerPointReader	thirdPointReader
protected org.apache.iotdb.tsfile.file.metadata.enums.TSDataType	thirdPointReaderDataType

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

Modifier	Constructor	Description
protected	TernaryTransformer(LayerPointReader firstPointReader, LayerPointReader secondPointReader, LayerPointReader thirdPointReader)

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
protected static double	castCurrentValueToDoubleOperand(LayerPointReader layerPointReader, org.apache.iotdb.tsfile.file.metadata.enums.TSDataType layerPointReaderDataType)
protected abstract void	checkType()
boolean	isConstantPointReader()
protected abstract void	transformAndCache()
protected 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

firstPointReader

protected final LayerPointReader firstPointReader

secondPointReader

protected final LayerPointReader secondPointReader

thirdPointReader

protected final LayerPointReader thirdPointReader

firstPointReaderDataType

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

secondPointReaderDataType

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

thirdPointReaderDataType

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

isFirstPointReaderConstant

protected final boolean isFirstPointReaderConstant

isSecondPointReaderConstant

protected final boolean isSecondPointReaderConstant

isThirdPointReaderConstant

protected final boolean isThirdPointReaderConstant

isCurrentConstant

protected final boolean isCurrentConstant

Constructor Detail

TernaryTransformer

protected TernaryTransformer(LayerPointReader firstPointReader,
                             LayerPointReader secondPointReader,
                             LayerPointReader thirdPointReader)

Method Detail

yieldValue

protected YieldableState yieldValue()
                             throws QueryProcessException,
                                    java.io.IOException

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:

QueryProcessException

java.io.IOException

isConstantPointReader

public boolean isConstantPointReader()

cacheValue

protected 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

checkType

protected abstract void checkType()

castCurrentValueToDoubleOperand

protected static double castCurrentValueToDoubleOperand(LayerPointReader layerPointReader,
                                                        org.apache.iotdb.tsfile.file.metadata.enums.TSDataType layerPointReaderDataType)
                                                 throws java.io.IOException,
                                                        QueryProcessException

Throws:

java.io.IOException

QueryProcessException