package pronto;

import java.util.Iterator;

public class TransformIterable implements Iterable {

public interface Xf {

Object transform(Object item);

}

static class Iter implements Iterator {

private final Iterator i;

private final Xf xf;

Iter(Iterator i, Xf xf) {

this.i = i;

this.xf = xf;

}

@Override

public boolean hasNext() {

return i.hasNext();

}

@Override

public Object next() {

return xf.transform(i.next());

}

}

private final Iterable inner;

private final Xf xf;

public TransformIterable(Iterable inner, Xf xf) {

this.inner = inner;

this.xf = xf;

}

@Override

public Iterator iterator() {

return new Iter(inner.iterator(), xf);

}

}