IExpressionFunction Interface

Allows you to define your own custom functions for use in expressions.

Namespace

expression

Methods

execute(args)

Implement this method to execute your custom function.

Signature

global Object execute(List<Object> args)

Parameters

Return Type

Object

The result of the function.

Example

This example shows how to implement a function that returns the sum of its arguments.

global class SumFunction implements IExpressionFunction {
    global Object execute(List<Object> args) {
        Decimal result = 0;
        for (Object arg : args) {
            result += (Decimal)arg;
        }
        return result;
    }
 }