/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
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, see http://www.gnu.org/licenses/. */
package com.db4o.internal.weakref;
import com.db4o.internal.*;
public class WeakReferenceSupportFactory {
public static WeakReferenceSupport forObjectContainer(ObjectContainerBase container) {
if (!Platform4.hasWeakReferences()) {
return disabledWeakReferenceSupport();
}
if (!container.configImpl().weakReferences()) {
return disabledWeakReferenceSupport();
}
return new EnabledWeakReferenceSupport(container);
}
public static WeakReferenceSupport disabledWeakReferenceSupport() {
return new WeakReferenceSupport() {
public void stop() {
}
public void start() {
}
public void purge() {
}
public Object newWeakReference(ObjectReference referent, Object obj) {
return obj;
}
};
}
}