/*
* Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.quercus.env;
import com.caucho.quercus.page.QuercusPage;
import java.lang.ref.WeakReference;
/**
* Key for caching function definitions
*/
public final class DefinitionKey {
// crc of the current definition
private final long _crc;
// the including page
private final WeakReference<QuercusPage> _includePageRef;
DefinitionKey(long crc, QuercusPage includePage)
{
_crc = crc;
_includePageRef = new WeakReference<QuercusPage>(includePage);
}
public int hashCode()
{
return (int) _crc;
}
public boolean equals(Object o)
{
if (! (o instanceof DefinitionKey))
return false;
DefinitionKey key = (DefinitionKey) o;
QuercusPage page = _includePageRef.get();
QuercusPage keyPage = key._includePageRef.get();
if (page == null || keyPage == null)
return false;
return (_crc == key._crc && page.equals(keyPage));
}
public String toString()
{
QuercusPage page = _includePageRef.get();
return "DefinitionKey[" + _crc + ", " + page + "]";
}
}