/**
*
* geo-platform
* Rich webgis framework
* http://geo-platform.org
* ====================================================================
*
* Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
*
* 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/
*
* ====================================================================
*
* 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 org.geosdi.geoplatform.support.jackson.jts.serializer.geometry.writer.bridge.finder;
import net.jcip.annotations.ThreadSafe;
import org.geosdi.geoplatform.support.jackson.jts.bridge.ImplementorArraySet;
import org.geosdi.geoplatform.support.jackson.jts.serializer.geometry.writer.bridge.implementor.GeometryWriterImplementor;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.ServiceLoader;
import java.util.Set;
/**
* @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
* @email giuseppe.lascaleia@geosdi.org
*/
@ThreadSafe
public final class GeometryWriterImplementorFinder {
private static final ServiceLoader<GeometryWriterImplementor> loader = ServiceLoader.<GeometryWriterImplementor>load(GeometryWriterImplementor.class);
private GeometryWriterImplementorFinder() {
}
private static final synchronized <I extends GeometryWriterImplementor> Set<I> getGeometryWriterImplementors(
Class<I> type, Boolean all) {
final Iterator<GeometryWriterImplementor> geometryWriterImplementors = loader.iterator();
return new ImplementorArraySet<>(new Iterator<I>() {
private I next;
@Override
public boolean hasNext() {
if (next != null) {
return true;
}
synchronized (GeometryWriterImplementorFinder.class) {
while (geometryWriterImplementors.hasNext()) {
GeometryWriterImplementor geometryWriterImplementor = geometryWriterImplementors.next();
if ((type == null) || (type.isInstance(geometryWriterImplementor))) {
if (all || geometryWriterImplementor.isImplementorValid()) {
next = (I) geometryWriterImplementor;
return true;
}
}
}
}
return false;
}
@Override
public I next() {
if (hasNext()) {
final I s = next;
next = null;
return s;
}
throw new NoSuchElementException("No more elements");
}
@Override
public void remove() {
throw new UnsupportedOperationException(
"Cannot remove elements "
+ "from this Iterator");
}
});
}
public static <I extends GeometryWriterImplementor> Set<I> getAllGeometryWriterImplementors() {
return getGeometryWriterImplementors(null, Boolean.TRUE);
}
public static Set<GeometryWriterImplementor> getValidGeometryWriterImplementors() {
return getGeometryWriterImplementors(GeometryWriterImplementor.class, Boolean.FALSE);
}
public static synchronized void reload() {
loader.reload();
}
}