Question regarding JSTL and function calls

Question

Hello
I'm quite new to JSTL and I'm having a problem accessing a function when I want to pass argument to that function.
Im using MVC where my M (model.jsp) can be accest from my V (view.jsp) by doing ${model.(parameter/some function) }
in my M I have a couple of getMethods() (example: getThisInfo() ) and som control methods like "isSomethingValid(arg1)"
my question is lets say I want to access my "isSomethingValid(arg1)" and arg1 should be the value of "getThisInfo()" I thought I could do like
${model.somethingValid($model.thisInfo)} but it isnt working I get:
"Unable to parse EL function ${model.somethingValid(model.thisInfo)}"
I know that the syntax above is a mix of scriptlet and JSTL but I dont know how to or if its even possible to achieve this?
Thanks for helping me!
Best Regards/DS

Answer 1

By default, EL can only access getters and setters on objects.
It can not execute general methods on an object.
You can define function libraries that call static methods
You have to write the method as static, and then declare it in a tld.
public boolean checkValid(Model m, Info i){ ...}
and then you could invoke it something like
<%@ taglib uri="myfunctionstaglib" prefix="myfunctions" %>
${myfunctions:checkValid(model, model.thisInfo)}