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/* IteratorWithoutRemove.java
* =========================================================================
* This file is part of the GrInvIn project - http://www.grinvin.org
*
* Copyright (C) 2005-2008 Universiteit Gent
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program 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
* General Public License for more details.
*
* A copy of the GNU General Public License can be found in the file
* LICENSE.txt provided with the source distribution of this program (see
* the META-INF directory in the source jar). This license can also be
* found on the GNU website at http://www.gnu.org/licenses/gpl.html.
*
* If you did not receive a copy of the GNU General Public License along
* with this program, contact the lead developer, or write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.grinvin.util;
import java.util.Iterator;
/**
* Allows the use of an existing iterator in such a way that the {@code remove} operation
* throws an {@code UnsupportedOperationException}.
*/
public class IteratorWithoutRemove<T> implements Iterator<T> {
//
private Iterator<T> delegate;
/** Create a new iterator that is backed by the given iterator of the same type,
* but does not allow the user to call its {@code remove} method. */
public IteratorWithoutRemove(Iterator<T> iterator) {
this.delegate = iterator;
}
// implements Iterator
public boolean hasNext() {
return delegate.hasNext();
}
// implements Iterator
public T next() {
return delegate.next();
}
// implements Iterator
public void remove() {
throw new UnsupportedOperationException();
}
}
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