IFunction (pip-services3-expressions 3.0.0 API)

All Known Implementing Classes:

DelegatedFunction
```
public interface IFunction
```
Defines an interface for expression function.

Method Summary

Modifier and Type	Method	Description
`Variant`	`calculate(List<Variant> params, IVariantOperations variantOperations)`	The function calculation method.
`String`	`getName()`	The function name.
`void`	`setName(String value)`	The function name.

- Method Detail
  - setName
```
void setName(String value)
```
    The function name.
  - getName
```
String getName()
```
    The function name.
  - calculate
```
Variant calculate(List<Variant> params,
                  IVariantOperations variantOperations)
           throws ExpressionException
```
    The function calculation method.
    
    Parameters:
    
    params - an array with function parameters.
    
    variantOperations - Variants operations manager.
    
    Returns:
    
    the function result.
    
    Throws:
    
    ExpressionException