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

Class BinaryTransformer

java.lang.Object

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

org.apache.iotdb.db.mpp.transformation.dag.transformer.binary.BinaryTransformer

All Implemented Interfaces:

LayerPointReader, YieldableReader

Direct Known Subclasses:

ArithmeticBinaryTransformer, CompareBinaryTransformer, LogicBinaryTransformer

public abstract class BinaryTransformer
extends Transformer

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	isCurrentConstant
protected boolean	isLeftPointReaderConstant
protected boolean	isRightPointReaderConstant
protected LayerPointReader	leftPointReader
protected org.apache.iotdb.tsfile.file.metadata.enums.TSDataType	leftPointReaderDataType
protected LayerPointReader	rightPointReader
protected org.apache.iotdb.tsfile.file.metadata.enums.TSDataType	rightPointReaderDataType

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	BinaryTransformer(LayerPointReader leftPointReader, LayerPointReader rightPointReader)

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()
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

leftPointReader

protected final LayerPointReader leftPointReader

rightPointReader

protected final LayerPointReader rightPointReader

leftPointReaderDataType

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

rightPointReaderDataType

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

isLeftPointReaderConstant

protected final boolean isLeftPointReaderConstant

isRightPointReaderConstant

protected final boolean isRightPointReaderConstant

isCurrentConstant

protected final boolean isCurrentConstant

Constructor Detail

BinaryTransformer

protected BinaryTransformer(LayerPointReader leftPointReader,
                            LayerPointReader rightPointReader)

Method Detail

checkType

protected abstract void checkType()

isConstantPointReader

public 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 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

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