UserDefinedFunctionVarArg (lenses-sql-udf 5.0.1 API)

All Superinterfaces:

UserDefinedFunction
```
public interface UserDefinedFunctionVarArg
extends UserDefinedFunction
```
Interface for User Defined Functions taking an arbitrary number of arguments.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Value`	`evaluate(java.util.List<Value> args)`	Evaluates this UDF for the given argument.
`DataType`	`typer(java.util.List<DataType> argTypes)`	Defines a mapping from input to output types.

Methods inherited from interface io.lenses.sql.udf.UserDefinedFunction
name, owner, version

- Method Detail
  - typer
```
DataType typer(java.util.List<DataType> argTypes)
        throws UdfException
```
    Defines a mapping from input to output types.
    
    Parameters:
    
    argTypes - List of argument data types.
    
    Returns:
    
    The resulting data type.
    
    Throws:
    
    UdfException - if one or more of the given data types are not supported by this UDF.
  - evaluate
```
Value evaluate(java.util.List<Value> args)
        throws UdfException
```
    Evaluates this UDF for the given argument.
    
    Parameters:
    
    args - List of arguments.
    
    Returns:
    
    The result of the evaluation.
    
    Throws:
    
    UdfException - if the evaluation failed for some reason.