invoke methods with parameter(s) on anonymous inner class beans in EL

Question

If I have an anonymous inner class object like this (where Foo is an interface):

Foo foo = new Foo(){
  @Override
  public String hello(Object dummyArg){
    return "hello, world.";
  }
};

and I try to call Foo.hello from a jsp like this:

${foo.hello('blah')}

it throws:

javax.el.MethodNotFoundException: Unable to find method [hello] with [1] parameters

but if there are no parameters:

Bar bar = new bar(){
  @Override
  public String hello(){
    return "hello, world.";
  }
};

...

${bar.hello()}

it works fine. Why?

This is not a duplicate of 7121303. I'm asking specifically about anonymous inner classes. With an instance of a regular class, it works with any number of parameters.

Answer 1

Possibly, you need to create EL function though which you can pass parameter. (http://blog.idleworx.com/2010/04/custom-tags-and-custom-el-functions-in.html)

the support for passing method arguments and invoking non-getter methods was introduced in EL 2.2 . Enable EL 2.2 on tomcat (http://code2inspire.wordpress.com/2010/11/05/how-to-enable-el-2-2-on-tomcat-6/)