/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.awt.font.renderer;
import java.lang.ref.WeakReference;
import java.util.HashMap;
import java.util.Map;
/**
* Class used to hold objects often used in the font render process.
*
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public class RenderContext {
private final Map<Object, WeakReference<?>> objects = new HashMap<Object, WeakReference<?>>();
/**
* Gets an object out of this context with a given key.
*
* @param key the key
* @return the cached object or {code null}
*/
public Object getObject(Object key) {
final WeakReference<?> ref = objects.get(key);
if (ref != null) {
return ref.get();
} else {
return null;
}
}
/**
* Stores an object in this context with a given key.
*
* @param key the key
* @param value the object
*/
public void setObject(Object key, Object value) {
final WeakReference<?> ref = objects.get(key);
if ((ref == null) || (ref.get() != value)) {
objects.put(key, new WeakReference<Object>(value));
}
}
}