ArrayEnumerationFactory.java Source code

Introduction

Here is the source code for ArrayEnumerationFactory.java

Source

import java.lang.reflect.Array;
import java.util.Enumeration;

final public class ArrayEnumerationFactory {
    static public Enumeration makeEnumeration(final Object obj) {
        Class type = obj.getClass();
        if (!type.isArray()) {
            throw new IllegalArgumentException(obj.getClass().toString());
        } else {
            return (new Enumeration() {
                int size = Array.getLength(obj);

                int cursor;

                public boolean hasMoreElements() {
                    return (cursor < size);
                }

                public Object nextElement() {
                    return Array.get(obj, cursor++);
                }
            });
        }
    }

    public static void main(String args[]) {
        Enumeration e = makeEnumeration(args);
        while (e.hasMoreElements()) {
            System.out.println(e.nextElement());
        }
        e = makeEnumeration(new int[] { 1, 3, 4, 5 });
        while (e.hasMoreElements()) {
            System.out.println(e.nextElement());
        }
        try {
            e = makeEnumeration(new Double(Math.PI));
        } catch (IllegalArgumentException ex) {
            System.err.println("Can't enumerate that: " + ex.getMessage());
        }
    }
}