how to deal with non-generic (legacy) code ?

[David Michel]

Hi All,

We all know that generics have been introduced in jdk 1.5 and that
Sun's javac still accepts raw types for backward compatibility.

With gcj, however, one will always get some warnings like "Vector is a
raw type. References to generic type Vector<T> should be
parameterized" when using raw types. It's easy to write the code with
generics properly so that these warnings do not appear, however, how
does one deal with, for instance, a method from a somewhat older
legacy code that returns a raw type.

Similarly, I'm using the java.lang.reflect package to invoke method
from its string name and I wrote this:

    private static Object callMethod(String cname, String mname,
String funcArg){
        try {
            Class cls = Class.forName(cname);
            Class argType[] = new Class[1];
            argType[0] = String.class;
            Method meth = cls.getMethod(mname, argType);
            Object retObj = meth.invoke(cls.newInstance(),funcArg);
            return retObj;
        }
        catch (Exception e){
            System.err.printf("Error: loading of the specified has
failed:\n%s\n",e);
            return null;
        }
    }

and I get these warnings:

warning: Class is a raw type. References to generic type Class<T>
should be parameterized
	Class cls = Class.forName(cname);
	^^^^^
./src/eu/keep/cli/Cli.java:191: warning: Class is a raw type.
References to generic type Class<T> should be parameterized
	Class argType[] = new Class[1];
	^^^^^
./src/eu/keep/cli/Cli.java:193: warning: Type safety: The method
getMethod(String, Class...) belongs to the raw type Class. References
to generic type Class<T> should be parameterized
	Method meth = cls.getMethod(mname, argType);


What is the proper way to deal with this ?
Is there a way to switch these warnings off ?

Cheers
David