package iteratorExamples;

import java.lang.Iterable;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.lang.reflect.Array;

/**
 * a correct implementation of an Iterator for an array, 
 * based upon
 * http://www.java-forums.org/new-java/2747-implementing-iterator.html
 */
public class MyArray1<AnotherClass> implements Iterable<AnotherClass>, Iterator<AnotherClass> 
{
    private int count;
    private AnotherClass[] collection; // collection.size() change to collection.length throughout

    /* Java compiler cannot check that new Objects will be 
       of class AnotherClass, so an unchecked warning results
       during compilation; the following line supresses this warning
    */ 
    @SuppressWarnings({"unchecked"})
    public MyArray1(){
        // details added by HMW
        collection = (AnotherClass []) new Object [10];
    }
	 
	 
    //constructors and other stuff here
    // details added by HMW
    AnotherClass get (int i) {
        if (i < 0 || i >= collection.length)
            throw (new NoSuchElementException());
        return collection[i];
    }
	
    void put (int i, AnotherClass ac){
        if (i < 0 || i >= collection.length)
            throw (new NoSuchElementException());
        collection[i] = ac;
    }
	 
    // Iterator material starts here
    public Iterator<AnotherClass> iterator() {
        return this;
    }
	 
    public boolean hasNext() {
        return count < collection.length;
    }
	 
    public AnotherClass next() {
        if(count == collection.length){
            throw new NoSuchElementException();
        }
        return collection[count++]; // ++ fix added according to Forum
    }	
	 
    public void remove() {
        throw new UnsupportedOperationException();
    }
	
    // method added per Forum's discussion
    public void reset() {
        count = 0;
    }
	
    public static void main (String args[]) {
        MyArray1<Integer> mc = new MyArray1<Integer>();
		
        int i;
		
        for (i = 0; i < 10; i++)
            mc.put(i, 2*i);
		
        System.out.println();

        // print out using Iterator
        System.out.println ("First output segment:");
        for (Integer item : mc) 
            {
                System.out.print("\t" + item);
            }
        System.out.println();
		
        mc.reset();

        // print out using Iterator
        System.out.println ("Second output segment:");
        for (Integer item1 : mc) 
            {  
                System.out.print("\tout  " + item1);	
                for (Integer item2 : mc) 
                    {   
                        System.out.print("\tin   " + item2);	
                    }			
                System.out.println();
            }			
        System.out.println();

        mc.reset();

        // print a third time using Iterator
        System.out.println ("Third output segment:");
        Iterator <Integer> it = mc.iterator();
        while (it.hasNext())
            System.out.print("\t" + it.next());
        System.out.println();
    }

}