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package de.lmu.ifi.dbs.elki.utilities.iterator;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.ListIterator;
/**
* Iterator proxy that does not allow modifications.
*
* @author Erich Schubert
*
* @apiviz.stereotype decorator
* @apiviz.composedOf ListIterator oneway - - decorates
*
* @param <T>
*/
public final class UnmodifiableListIterator<T> implements ListIterator<T> {
/**
* Real iterator
*/
private ListIterator<T> inner;
/**
* Constructor.
*
* @param inner Real iterator to proxy.
*/
public UnmodifiableListIterator(ListIterator<T> inner) {
super();
this.inner = inner;
}
@Override
public boolean hasNext() {
return inner.hasNext();
}
@Override
public T next() {
return inner.next();
}
@Override
public boolean hasPrevious() {
return inner.hasPrevious();
}
@Override
public T previous() {
return inner.previous();
}
@Override
public int nextIndex() {
return inner.nextIndex();
}
@Override
public int previousIndex() {
return inner.previousIndex();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
@Override
public void add(@SuppressWarnings("unused") T e) {
throw new UnsupportedOperationException();
}
@Override
public void set(@SuppressWarnings("unused") T e) {
throw new UnsupportedOperationException();
}
}
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