IterableAdapter.java

package org.trie4j.util;

import java.util.Iterator;

public abstract class IterableAdapter<T, U> implements Iterable<U>{
	public IterableAdapter(Iterable<T> orig) {
		this.orig = orig;
	}

	@Override
	public Iterator<U> iterator() {
		final Iterator<T> it = orig.iterator();
		return new Iterator<U>(){
			@Override
			public boolean hasNext() {
				return it.hasNext();
			}
			@Override
			public U next() {
				return convert(it.next());
			}
			@Override
			public void remove() {
				it.remove();
			};
		};
	}

	protected abstract U convert(T value);

	private Iterable<T> orig;
}