Struts 2 calling static method when struts.ognl.allowStaticMethodAccess is false

The struts 2 set the struts.ognl.allowStaticMethodAccess to false, for security issues. The static method invocation may be useful in some cases for example when dealing with expression base validators Struts 2 using StringUtils in validator expersions.

One way to solve this problem is to define a helper method in the action, for example, if we want to use Math class we should add below:

public double randomMath(){
  return Math.random();
}


public double asinMath(double a){
  return Math.asin(a);
}

....

And use it as ${randomMath} or ${asinMath(1)}

As you can see for every method in Math class we need to define a public method in our action, with same signature.

Is there a better way to avoid these boilerplate getters?!