Package org.apache.iotdb.db.query.udf.example

Class Accumulator

java.lang.Object

org.apache.iotdb.db.query.udf.example.Accumulator

All Implemented Interfaces:

UDF, UDTF

public class Accumulator
extends Object
implements UDTF

Constructor Summary

Constructors

Constructor	Description
Accumulator()

Method Summary

Modifier and Type	Method	Description
void	beforeDestroy()
void	beforeStart(UDFParameters parameters, UDTFConfigurations configurations)
void	transform(Row row, PointCollector collector)
void	transform(RowWindow rowWindow, PointCollector collector)
void	validate(UDFParameterValidator validator)

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.udf.api.UDTF

terminate, transform, transform, transform

Constructor Details

Accumulator

public Accumulator()

Method Details

validate

public void validate(UDFParameterValidator validator)
              throws Exception

Specified by:

validate in interface UDF

Throws:

Exception

beforeStart

public void beforeStart(UDFParameters parameters,
 UDTFConfigurations configurations)

Specified by:

beforeStart in interface UDTF

transform

public void transform(Row row,
 PointCollector collector)
               throws IOException

Specified by:

transform in interface UDTF

Throws:

IOException

transform

public void transform(RowWindow rowWindow,
 PointCollector collector)
               throws IOException

Specified by:

transform in interface UDTF

Throws:

IOException

beforeDestroy

public void beforeDestroy()

Specified by:

beforeDestroy in interface UDF