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

Class UnaryColumnTransformer

java.lang.Object

org.apache.iotdb.db.mpp.transformation.dag.column.ColumnTransformer

org.apache.iotdb.db.mpp.transformation.dag.column.unary.UnaryColumnTransformer

Direct Known Subclasses:

ArithmeticNegationColumnTransformer, InColumnTransformer, IsNullColumnTransformer, LogicNotColumnTransformer, RegularColumnTransformer

public abstract class UnaryColumnTransformer
extends ColumnTransformer

Field Summary

Fields

Modifier and Type	Field	Description
protected ColumnTransformer	childColumnTransformer

Fields inherited from class org.apache.iotdb.db.mpp.transformation.dag.column.ColumnTransformer

columnCache, referenceCount, returnType

Constructor Summary

Constructors

Constructor	Description
UnaryColumnTransformer(org.apache.iotdb.tsfile.read.common.type.Type returnType, ColumnTransformer childColumnTransformer)

Method Summary

Modifier and Type	Method	Description
protected void	checkType()
protected abstract void	doTransform(org.apache.iotdb.tsfile.read.common.block.column.Column column, org.apache.iotdb.tsfile.read.common.block.column.ColumnBuilder columnBuilder)
void	evaluate()	Responsible for the calculation
ColumnTransformer	getChildColumnTransformer()

Methods inherited from class org.apache.iotdb.db.mpp.transformation.dag.column.ColumnTransformer

addReferenceCount, close, getColumn, getColumnCachePositionCount, getType, initializeColumnCache, isReturnTypeNumeric, tryEvaluate

Methods inherited from class java.lang.Object

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

Field Detail

childColumnTransformer

protected ColumnTransformer childColumnTransformer

Constructor Detail

UnaryColumnTransformer

public UnaryColumnTransformer(org.apache.iotdb.tsfile.read.common.type.Type returnType,
                              ColumnTransformer childColumnTransformer)

Method Detail

evaluate

public void evaluate()

Description copied from class: ColumnTransformer

Responsible for the calculation

Specified by:

evaluate in class ColumnTransformer

getChildColumnTransformer

public ColumnTransformer getChildColumnTransformer()

checkType

protected void checkType()

Specified by:

checkType in class ColumnTransformer

doTransform

protected abstract void doTransform(org.apache.iotdb.tsfile.read.common.block.column.Column column,
                                    org.apache.iotdb.tsfile.read.common.block.column.ColumnBuilder columnBuilder)