UDF (udf-api 1.1.0 API)

All Known Subinterfaces:

UDTF
```
public interface UDF
```

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`beforeDestroy()`	This method is mainly used to release the resources used in the UDF.
`default void`	`validate(UDFParameterValidator validator)`	This method is mainly used to validate `UDFParameters` and it is executed before `UDTF.beforeStart(UDFParameters, UDTFConfigurations)` is called.

- Method Detail
  - validate
```
default void validate(UDFParameterValidator validator)
               throws java.lang.Exception
```
    This method is mainly used to validate UDFParameters and it is executed before UDTF.beforeStart(UDFParameters, UDTFConfigurations) is called.
    
    Parameters:
    
    validator - the validator used to validate UDFParameters
    
    Throws:
    
    java.lang.Exception - if any parameter is not valid
  - beforeDestroy
```
default void beforeDestroy()
```
    This method is mainly used to release the resources used in the UDF.