/
TimeZoneRegistryFactory.java
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/
TimeZoneRegistryFactory.java
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/**
* Copyright (c) 2012, Ben Fortuna
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* o Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* o Neither the name of Ben Fortuna nor the names of any other contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package net.fortuna.ical4j.model;
import net.fortuna.ical4j.util.Configurator;
import java.util.Optional;
/**
* $Id$
*
* Created on 18/09/2005
*
* Provides access to the configured <code>TimeZoneRegistry</code> instance.
* Alternative factory implementations may be specified via the following
* system property:
* <pre>net.fortuna.ical4j.timezone.registry=<factory_class_name></pre>
* @author Ben Fortuna
*/
public abstract class TimeZoneRegistryFactory {
/**
* The system property used to specify an alternate
* <code>TimeZoneRegistryFactory</code> implementation.
*/
public static final String KEY_FACTORY_CLASS = "net.fortuna.ical4j.timezone.registry";
private static final TimeZoneRegistryFactory instance;
static {
Optional<TimeZoneRegistryFactory> property = Configurator.getObjectProperty(KEY_FACTORY_CLASS);
instance = property.orElse(new DefaultTimeZoneRegistryFactory());
}
/**
* @return a shared factory instance
*/
public static TimeZoneRegistryFactory getInstance() {
return instance;
}
/**
* Returns a new instance of the configured <code>TimeZoneRegistry</code>.
* @return a timezone registry instance
*/
public abstract TimeZoneRegistry createRegistry();
}