/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2005-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.referencing.factory.epsg;
import javax.sql.DataSource;
import org.geotools.factory.GeoTools;
import org.geotools.factory.Hints;
import org.geotools.referencing.factory.AbstractCachedAuthorityFactory;
import org.geotools.referencing.factory.AbstractEpsgMediator;
import org.opengis.referencing.FactoryException;
/**
* Mediator which delegates the creation of referencing objects to the
* HsqlDialectEpsgFactory.
*
* @author Cory Horner (Refractions Research)
*
*
*
* @source $URL$
*/
public class HsqlDialectEpsgMediator extends AbstractEpsgMediator {
Hints hints;
/**
* Creates a new instance of this factory.
*/
public HsqlDialectEpsgMediator() throws FactoryException {
this( GeoTools.getDefaultHints() );
}
/**
* Creates a new instance of this data source using the specified hints. The priority
* is set to a lower value than the {@linkplain FactoryOnAccess}'s one in order to give
* precedence to the Access-backed database, if presents. Priorities are set that way
* because:
* <ul>
* <li>The MS-Access format is the primary EPSG database format.</li>
* <li>If a user downloads the MS-Access database himself, he probably wants to use it.</li>
* </ul>
*/
public HsqlDialectEpsgMediator(final Hints hints) throws FactoryException {
super(hints, HsqlEpsgDatabase.createDataSource( hints ));
}
/**
* Creates an HsqlDialectEpsgMediator with a 20 min timeout, single worker,
* and no cache.
*
* @param priority
* @param datasource
*/
public HsqlDialectEpsgMediator(int priority, DataSource datasource) {
this( priority,
new Hints(Hints.AUTHORITY_MAX_ACTIVE,
Integer.valueOf(1),
new Object[] {
Hints.AUTHORITY_MIN_EVICT_IDLETIME, Integer.valueOf(20 * 60 * 1000),
Hints.CACHE_POLICY, "none"
}
),
datasource
);
}
public HsqlDialectEpsgMediator(int priority, Hints hints, DataSource datasource) {
super(hints, datasource);
this.hints = hints;
}
/**
* Reinitialize an instance to be returned by the pool.
*/
protected void activateWorker(AbstractCachedAuthorityFactory obj) throws Exception {
HsqlDialectEpsgFactory factory = (HsqlDialectEpsgFactory) obj;
factory.connect();
}
/**
* Destroys an instance no longer needed by the pool.
*/
protected void destroyWorker(AbstractCachedAuthorityFactory obj) throws Exception {
HsqlDialectEpsgFactory factory = (HsqlDialectEpsgFactory) obj;
factory.disconnect();
factory.dispose();
factory = null;
}
/**
* Creates an instance that can be returned by the pool.
*/
protected AbstractCachedAuthorityFactory makeWorker() throws Exception {
HsqlDialectEpsgFactory factory = new HsqlDialectEpsgFactory(hints, datasource);
return factory;
}
/**
* Uninitialize an instance to be returned to the pool.
*/
protected void passivateWorker(AbstractCachedAuthorityFactory obj) throws Exception {
HsqlDialectEpsgFactory factory = (HsqlDialectEpsgFactory) obj;
factory.disconnect();
}
/**
* Ensures that the instance is safe to be returned by the pool.
*/
protected boolean validateWorker(AbstractCachedAuthorityFactory obj) {
return true;
}
}