/*
* UnitSystemSI.java, unit system for the "International System of Units" (abbr. SI).
* Copyright (C) 2004 - 2011 Achim Westermann.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* If you modify or optimize the code in a useful way please let me know.
* Achim.Westermann@gmx.de
*
*/
package info.monitorenter.util.units;
/**
* The unit system for the "International System of Units" (SI).
* <p>
*
* @see info.monitorenter.util.units.AUnit
*
* @see info.monitorenter.util.units.UnitFactory
*
* @see info.monitorenter.util.units.IUnitSystem
*
* @author <a href='mailto:Achim.Westermann@gmx.de'>Achim Westermann </a>
*
* @version $Revision: 1.7 $
*/
public final class UnitSystemSI implements IUnitSystem {
/** Singleton instance. */
private static IUnitSystem instance;
/** The unit classes of this system. */
private static final Class<?>[] UNITS = new Class[] {UnitFemto.class, UnitNano.class,
UnitMicro.class, UnitMilli.class, UnitUnchanged.class, UnitKilo.class, UnitMega.class,
UnitGiga.class, UnitTera.class, UnitPeta.class };
/**
* Singleton retrieval method.
* <p>
*
* @return the unique instance within the current VM.
*/
public static IUnitSystem getInstance() {
if (UnitSystemSI.instance == null) {
UnitSystemSI.instance = new UnitSystemSI();
}
return UnitSystemSI.instance;
}
/**
* Singleton constructor.
* <p>
*
*/
private UnitSystemSI() {
// nop
}
/**
* @see info.monitorenter.util.units.IUnitSystem#getUnits()
*/
public Class<?>[] getUnits() {
int len = UnitSystemSI.UNITS.length;
Class<?>[] result = new Class[len];
System.arraycopy(UnitSystemSI.UNITS, 0, result, 0, len);
return result;
}
}