/**
* geo-platform
* Rich webgis framework
* http://geo-platform.org
* ====================================================================
* <p>
* Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
* <p>
* This program 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 3 of the License, or
* (at your option) any later version. This program 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/
* <p>
* ====================================================================
* <p>
* 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.
* <p>
* 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 org.geosdi.geoplatform.jaxb;
import javax.xml.bind.*;
import java.lang.ref.WeakReference;
/**
* <p>This Class is a Decorator for {@link JAXB} class.
* If you want use a pool class see {@link org.geosdi.geoplatform.jaxb.pool.GPJAXBContextBuilderPool}
* </p>
*
* @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
* @email giuseppe.lascaleia@geosdi.org
*/
public final class GPJAXBContextBuilder extends AbstractJAXBContextBuilder {
private volatile WeakReference<GPJAXBContextCache> cache;
private GPJAXBContextBuilder() {
}
public static GPJAXBContextBuilder newInstance() {
return new GPJAXBContextBuilder();
}
/**
* @param type
* @param <T>
* @return {@link JAXBContext}
* @throws JAXBException
*/
protected <T> JAXBContext getContext(Class<T> type) throws JAXBException {
WeakReference<GPJAXBContextCache> c = cache;
if (c != null) {
GPJAXBContextCache d = c.get();
if (d != null && d.type == type) {
return d.context;
}
}
// overwrite the cache
GPJAXBContextCache d = new GPJAXBContextCache(type);
cache = new WeakReference<GPJAXBContextCache>(d);
return d.context;
}
}