/*
* Primitive Collections for Java.
* Copyright (C) 2002, 2003 S�ren Bak
*
* This library 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 library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package bak.pcj.set;
import bak.pcj.AbstractCharCollection;
import bak.pcj.CharIterator;
import bak.pcj.hash.DefaultCharHashFunction;
/**
* This class represents an abstract base for implementing
* sets of char values. All operations that can be implemented
* using iterators and the <tt>get()</tt> and <tt>set()</tt> methods
* are implemented as such. In most cases, this is
* hardly an efficient solution, and at least some of those
* methods should be overridden by sub-classes.
*
* @author Søren Bak
* @version 1.1 2003/1/10
* @since 1.0
*/
public abstract class AbstractCharSet extends AbstractCharCollection implements CharSet {
/** Default constructor to be invoked by sub-classes. */
protected AbstractCharSet() { }
public boolean equals(Object obj) {
if (!(obj instanceof CharSet))
return false;
CharSet s = (CharSet)obj;
if (s.size() != size())
return false;
return containsAll(s);
}
public int hashCode() {
int h = 0;
CharIterator i = iterator();
while (i.hasNext())
h += DefaultCharHashFunction.INSTANCE.hash(i.next());
return h;
}
}