SwitchFunction (EvalEx 3.3.0 API)

java.lang.Object
- com.ezylang.evalex.functions.AbstractFunction
- - com.ezylang.evalex.functions.basic.SwitchFunction

All Implemented Interfaces:

FunctionIfc
```
@FunctionParameter(name="expression") @FunctionParameter(name="value1") @FunctionParameter(name="result1",isLazy=true) @FunctionParameter(name="additionalValues",isLazy=true,isVarArg=true)
public class SwitchFunction
extends AbstractFunction
```
A function that evaluates one value (or expression) against a list of values, and returns the result corresponding to the first matching value. If there is no match, an optional default value may be returned.
Syntax:
SWITCH(expression, value1, result1, [value, result, ...], [default])

Examples:
1. The following function will return either "Sunday", "Monday", or "Tuesday", depending on the result of the variable weekday. Since no default value was specified, the function will return a null value if there is no match:
SWITCH(weekday, 1, "Sunday", 2, "Monday", 3, "Tuesday")

2. The following function will return either "Sunday", "Monday", "Tuesday", or "No match", depending on the result of the variable weekday:
SWITCH(weekday, 1, "Sunday", 2, "Monday", 3, "Tuesday", "No match")

Author:

oswaldo.bapvic.jr

Field Summary
- Fields inherited from class com.ezylang.evalex.functions.AbstractFunction
  MINUS_ONE

Constructor Summary

Constructors
Constructor Description

SwitchFunction()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`EvaluationValue`	`evaluate(Expression expression, Token functionToken, EvaluationValue... parameterValues)`	Performs the function logic and returns an evaluation result.

Methods inherited from class com.ezylang.evalex.functions.AbstractFunction
getFunctionParameterDefinitions, hasVarArgs, validatePreEvaluation

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.ezylang.evalex.functions.FunctionIfc
getCountOfNonVarArgParameters, isParameterLazy

- Constructor Detail
  - SwitchFunction
```
public SwitchFunction()
```
- Method Detail
  - evaluate
```
public EvaluationValue evaluate(Expression expression,
                                Token functionToken,
                                EvaluationValue... parameterValues)
                         throws EvaluationException
```
    Description copied from interface: FunctionIfc
    
    Performs the function logic and returns an evaluation result.
    
    Parameters:
    
    expression - The expression, where this function is executed. Can be used to access the expression configuration.
    
    functionToken - The function token from the parsed expression.
    
    parameterValues - The parameter values.
    
    Returns:
    
    The evaluation result in form of a EvaluationValue.
    
    Throws:
    
    EvaluationException - In case there were problems during evaluation.