/*
* Copyright 1990-2009 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package javax.microedition.sensor;
import java.util.*;
public class Unit {
private static Hashtable unitTable = new Hashtable();
private String symbol;
private Unit(String s) {
symbol = s;
}
public static Unit getUnit(java.lang.String symbol) {
if (symbol == null) {
throw new NullPointerException();
}
if (symbol.length() == 0) {
throw new IllegalArgumentException();
}
synchronized (unitTable) {
Unit unit = (Unit)unitTable.get(symbol);
if (unit == null) {
unit = new Unit(symbol);
unitTable.put(symbol, unit);
}
return unit;
}
}
public java.lang.String toString() {
return symbol;
}
}