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

Class Counter

java.lang.Object

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

All Implemented Interfaces:

UDF, UDTF

public class Counter
extends Object
implements UDTF

Constructor Summary

Constructors

Constructor	Description
Counter()

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)

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.UDF

validate

Methods inherited from interface org.apache.iotdb.udf.api.UDTF

terminate, transform, transform, transform

Constructor Details

Counter

public Counter()

Method Details

beforeStart

public void beforeStart(UDFParameters parameters,
 UDTFConfigurations configurations)

Specified by:

beforeStart in interface UDTF

transform

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

Specified by:

transform in interface UDTF

Throws:

Exception

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