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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
** **
\* */
// $Id$
package scalac.util;
import java.util.*;
/**
* Class to assign unique and small numbers to objects, based on their
* identity.
*
* @author Michel Schinz
* @version 1.0
*/
public class UniqueID {
protected Map ids = new HashMap();
public int id(Object obj) {
if (! ids.containsKey(obj))
ids.put(obj, new Integer(ids.size()));
return ((Integer)ids.get(obj)).intValue();
}
}
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