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-/* ObjectIdentityWrapper.java -- Wrapper class used to override equals()
- and hashCode() to be as discriminating as possible
- Copyright (C) 1998 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath 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, or (at your option)
-any later version.
-
-GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package gnu.java.io;
-
-/**
- This class is a thin wrapper around <code>Object</code> that makes
- the methods <code>hashCode()</code> and <code>equals(Object)</code>
- as discriminating as possible.
-*/
-public class ObjectIdentityWrapper
-{
-
- /**
- Constructs a <code>ObjectIdentityWrapper</code> that is wrapped
- around o.
- */
- public ObjectIdentityWrapper( Object o )
- {
- object = o;
- }
-
- /**
- Uses <code>System.identityHashCode(Object)</code> to compute a
- hash code for the object wrapped by this
- <code>ObjectIdentityWrapper</code>.
-
- @see java.lang.System#identityHashCode(java.lang.Object)
- @see java.util.Hashtable
- @see java.lang.Object#hashCode()
- */
- public int hashCode()
- {
- return System.identityHashCode( object );
- }
-
- /**
- Uses the <code>==</code> operator to test for equality between
- the object wrapped by this <code>ObjectIdentityWrapper</code> and
- the object wrapped by the <code>ObjectIdentityWrapper</code> o.
- Returns false if o is not a <code>ObjectIdentityWrapper</code>.
-
- @see java.util.Hashtable
- @see java.lang.Object#equals()
- */
- public boolean equals( Object o )
- {
- if( o instanceof ObjectIdentityWrapper )
- return object == ((ObjectIdentityWrapper)o).object;
- else
- return false;
- }
-
- public String toString()
- {
- return "ObjectIdentityWrapper< " + object + ", " + hashCode() + " >";
- }
-
- /**
- The <code>Object</code> wrapped by this
- <code>ObjectIdentityWrapper</code>.
- */
- public Object object;
-}