de.congrace.exp4j
Class CustomFunction
java.lang.Object
de.congrace.exp4j.CustomFunction
public abstract class CustomFunction
- extends Object
this classed is used to create custom functions for exp4j
Example
CustomFunction fooFunc = new CustomFunction("foo") {
public double applyFunction(double value) {
return value*Math.E;
}
};
double varX=12d;
Calculable calc = new ExpressionBuilder("foo(x)").withCustomFunction(fooFunc).withVariable("x",varX).build();
assertTrue(calc.calculate() == Math.E * varX);
}
- Author:
- frank asseg
Constructor Summary |
protected |
CustomFunction(String name)
create a new single value input CustomFunction with a set name |
protected |
CustomFunction(String name,
int argumentCount)
create a new single value input CustomFunction with a set name |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CustomFunction
protected CustomFunction(String name)
throws InvalidCustomFunctionException
- create a new single value input CustomFunction with a set name
- Parameters:
value
- the name of the function (e.g. foo)
- Throws:
InvalidCustomFunctionException
CustomFunction
protected CustomFunction(String name,
int argumentCount)
throws InvalidCustomFunctionException
- create a new single value input CustomFunction with a set name
- Parameters:
value
- the name of the function (e.g. foo)
- Throws:
InvalidCustomFunctionException
getArgumentCount
public int getArgumentCount()
applyFunction
public abstract double applyFunction(double... args)
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