/*
  A base-level class controlled by VerboseMetaobj.
*/

package sample.reflect;

import javassist.reflect.Metalevel;
import javassist.reflect.Metaobject;

public class Person {
    public String name;
    public static int birth = 3;
    public static final String defaultName = "John";

    public Person(String name, int birthYear) {
	if (name == null)
	    this.name = defaultName;
	else
	    this.name = name;

	this.birth = birthYear;
    }

    public String getName() {
	return name;
    }

    public int getAge(int year) {
	return year - birth;
    }

    public static void main(String[] args) {
	String name;
	if (args.length > 0)
	    name = args[0];
	else
	    name = "Bill";

	Person p = new Person(name, 1960);
	System.out.println("name: " + p.getName());
	System.out.println("object: " + p.toString());

	// change the metaobject of p.
	if (p instanceof Metalevel) {
	    ((Metalevel)p)._setMetaobject(new Metaobject(p, null));
	    System.out.println("<< the metaobject was changed.>>");
	}

	System.out.println("age: " + p.getAge(1999));
    }
}