Programming problem with Generics

Question

Hello all...
I'm trying to get a class using generics. This class is a generic Parser. Here is a piece of code:
package com.parser;
import java.io.StringReader;
public class Parser<T> {
     private Class<T> constructedClass= null;
        String myString= null;
     public Parser(Class<T> class, String str;) {
          constructedClass= class;
                myString= str;
     public T parse(String document)
          throws JAXBException, ClassNotFoundException {
          ConstructedClasscc = ConstructedClass.newInstance(constructedClass.getPackage().getName());
          Transformer u = cc.getTransformer ();
          return ConstructedClass.cast(u.transform(myString);
}This code is working now, but I need include Class<T> parameter in the constructor in order to get the name of the package.
I've tried to clear this constructor, but i'm not able to find any trick to avoid the: constructedClass.getPackage().getName()* line without constructedClass param.
Does exist any method to obtain it?
Thankyou all in advance.

Answer 1

No, erasure means that generics information like that isn't available at run time. it's quite common for generic classes to take the actual class as a parameter for that reason (see, for example, the EnumMap constructor.)