/*
* Copyright (C) 2011 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.portal.tree.diff;
import java.util.Iterator;
import java.util.NoSuchElementException;
/**
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
*/
public class Adapters
{
/** . */
private static final ArrayAdapter ARRAY_INSTANCE = new ArrayAdapter();
public static <E> ListAdapter<E[], E> list()
{
@SuppressWarnings("unchecked")
ListAdapter<E[], E> adapter = (ListAdapter<E[], E>)ARRAY_INSTANCE;
return adapter;
}
private static class ArrayAdapter<E> implements ListAdapter<E[], E>
{
public int size(E[] list)
{
return list.length;
}
public Iterator<E> iterator(final E[] list, final boolean reverse)
{
return new Iterator<E>()
{
/** . */
int count = 0;
public boolean hasNext()
{
return count < list.length;
}
public E next()
{
if (!hasNext())
{
throw new NoSuchElementException();
}
int index = count++;
if (reverse)
{
index = list.length - index - 1;
}
return list[index];
}
public void remove()
{
throw new UnsupportedOperationException();
}
};
}
}
}