ImmutableIterator.java :  » Database-DBMS » db4o-6.4 » EDU » purdue » cs » bloat » util » Java Open Source

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db4o 6.4 » EDU » purdue » cs » bloat » util » ImmutableIterator.java
/* Copyright (C) 2004 - 2007  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

db4o 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.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */
package EDU.purdue.cs.bloat.util;

import java.util.*;

/**
 * ImmutableIterator is simply an iterator whose contents can not be changed.
 * That is, the remove() method has no effect.
 */
public class ImmutableIterator implements Iterator {
  Iterator iter;

  public ImmutableIterator(final Collection c) {
    iter = new ArrayList(c).iterator();
  }

  public Object next() {
    return iter.next();
  }

  public boolean hasNext() {
    return iter.hasNext();
  }

  public void remove() {
    throw new UnsupportedOperationException();
  }
}
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