package reflection;

public class ClassTestClass
{
    public static void main(String[] args)
    {
        Class c;
        try
        {
            c = Class.forName("java.lang.String");
            printInfo(c);
        }
        catch(ClassNotFoundException e)
        {
            System.err.println("Class java.lang.String not found!");
        }
        c = int.class;
        printInfo(c);
        c = Double[].class;
        printInfo(c);
        c = int[].class;
        printInfo(c);
        short[] shortArray = new short[] {5, 10, 15};
        c = shortArray.getClass();
        printInfo(c);
        c = Person.class;
        printInfo(c);
        c = Employee.class;
        printInfo(c);
        c = Manager.class;
        printInfo(c);
        c = Hirer.class;
        printInfo(c);
        c = HirerFirer.class;
        printInfo(c);
    }
    
    private static void printInfo(Class c)
    {
        System.out.println("toString(): " + c.toString());
        if (c.isPrimitive())
            printPrimitiveInfo(c);
        else if (c.isArray())
            printArrayInfo(c);
        else
            printClassInfo(c);
    }
    
    private static void printPrimitiveInfo(Class c)
    {
        String typeName = c.getName();
        System.out.println("Type " + typeName);
    }
    
    private static void printArrayInfo(Class c)
    {
        Class component = c.getComponentType();
        System.out.println("Array of " + component.getName());
    }
    
    private static void printClassInfo(Class c)
    {
        String className = c.getName();
        int index = className.lastIndexOf('.');
        String packageName;
        if (index != -1)
        {
            packageName = className.substring(0, index);
            System.out.println("package " + packageName + ";");
            className = className.substring(index+1, className.length());
        }

        String type = (c.isInterface())?"interface":"class";
        System.out.println(type + " " + className);

        Class superClass = c.getSuperclass();
        if (superClass != null)
            System.out.println("    extends " + superClass.getName());

        Class[] interfaces = c.getInterfaces();
        if ((interfaces != null) && (interfaces.length > 0))
        {
            if (c.isInterface())
                System.out.print("    extends ");
            else
                System.out.print("    implements ");
            for (int i = 0; i < interfaces.length; i++)
            {
                if (i > 0)
                    System.out.print(", ");
                System.out.print(interfaces[i].getName());
            }
            System.out.println();
        }

        System.out.println("{");
        System.out.println("}");
    }
}