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title: “Java UDF” description: “User-defined function operator in Java script” category: “Java” operator_type: “JavaUDF” tags: [user-defined-functions, java]

Home > User Defined Functions > Java

Input Properties

Property	Requirement	Type	Default	Description
Java UDF script	✓	Code (java)	See template below	Input your code here
Worker count	✓	Integer	1	Specify how many parallel workers to launch
Retain input columns	✓	Boolean	true	Keep the original input columns?
Extra output column(s)		List	-	Name of the newly added output columns that the UDF will produce, if any
↳ Attribute Name	✓	String	-
↳ Attribute Type	✓	string, integer, long, double, boolean, timestamp, binary, large_binary	-

Default Code Template

Java UDF script

import org.apache.texera.amber.operator.map.MapOpExec;
import org.apache.texera.amber.core.tuple.Tuple;
import org.apache.texera.amber.core.tuple.TupleLike;
import scala.Function1;
import java.io.Serializable;

public class JavaUDFOpExec extends MapOpExec {
    public JavaUDFOpExec () {
        this.setMapFunc((Function1<Tuple, TupleLike> & Serializable) this::processTuple);
    }
    
    public TupleLike processTuple(Tuple tuple) {
        return tuple;
    }
}

Output Ports

Port	Mode
0	Set Snapshot