/*
* 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.Comparator;
/**
* @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a>
*/
public class ListDiff<L1, L2, E> {
/** . */
final Comparator<E> comparator;
/** . */
final ListAdapter<L1, E> adapter1;
/** . */
final ListAdapter<L2, E> adapter2;
public ListDiff(ListAdapter<L1, E> adapter1, ListAdapter<L2, E> adapter2, Comparator<E> comparator) {
this.adapter1 = adapter1;
this.adapter2 = adapter2;
this.comparator = comparator;
}
public ListDiff(ListAdapter<L1, E> adapter1, ListAdapter<L2, E> adapter2) {
this(adapter1, adapter2, null);
}
boolean equals(E e1, E e2) {
if (comparator == null) {
return e1.equals(e2);
} else {
return comparator.compare(e1, e2) == 0;
}
}
public final ListChangeIterator<L1, L2, E> iterator(L1 elements1, L2 elements2) {
return new ListChangeIterator<L1, L2, E>(this, elements1, elements2);
}
}