LeafColumnTransformer (IoTDB Server 0.14.0-preview2 API)

java.lang.Object
- org.apache.iotdb.db.mpp.transformation.dag.column.ColumnTransformer
- - org.apache.iotdb.db.mpp.transformation.dag.column.leaf.LeafColumnTransformer

Direct Known Subclasses:

ConstantColumnTransformer, IdentityColumnTransformer, TimeColumnTransformer
```
public abstract class LeafColumnTransformer
extends ColumnTransformer
```

Field Summary
- Fields inherited from class org.apache.iotdb.db.mpp.transformation.dag.column.ColumnTransformer
  columnCache, referenceCount, returnType

Constructor Summary

Constructors
Constructor Description

LeafColumnTransformer(org.apache.iotdb.tsfile.read.common.type.Type returnType)

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`checkType()`
`void`	`evaluate()`	Responsible for the calculation
`abstract void`	`initFromTsBlock(org.apache.iotdb.tsfile.read.common.block.TsBlock input)`

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

- Constructor Detail
  - LeafColumnTransformer
```
public LeafColumnTransformer(org.apache.iotdb.tsfile.read.common.type.Type returnType)
```
- Method Detail
  - evaluate
```
public void evaluate()
```
    Description copied from class: ColumnTransformer
    
    Responsible for the calculation
    
    Specified by:
    
    evaluate in class ColumnTransformer
  - checkType
```
public void checkType()
```
    Specified by:
    
    checkType in class ColumnTransformer
  - initFromTsBlock
```
public abstract void initFromTsBlock(org.apache.iotdb.tsfile.read.common.block.TsBlock input)
```