/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* 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 version 2 of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.core.clientapi.util.units;
import java.util.Locale;
import java.math.BigDecimal;
import java.text.ParseException;
import java.text.NumberFormat;
/**
* @author Greg Hinkle
*/
public class TemperatureFormatter implements Formatter {
public FormattedNumber format(UnitNumber val, Locale locale, FormatSpecifics format) {
BigDecimal celsius = convert(val.getBaseValue(), val.getScale());
return new FormattedNumber(getSpecificFormatter().format(celsius.doubleValue()), "C");
}
private BigDecimal convert(BigDecimal val, ScaleConstants scale) {
BigDecimal celsius = null;
switch (scale) {
case SCALE_KELVIN:
celsius = val.subtract(new BigDecimal(273.15d));
break;
case SCALE_CELSIUS:
celsius = val;
break;
case SCALE_FAHRENHEIT:
celsius = val.subtract(new BigDecimal(32)).divide(new BigDecimal(5).divide(new BigDecimal(9)));
break;
}
return celsius;
}
public FormattedNumber[] formatSame(double[] values, UnitsConstants unitType, ScaleConstants scale, Locale locale, FormatSpecifics format) {
FormattedNumber[] numbers = new FormattedNumber[values.length];
int i=0;
for (double val : values) {
numbers[i] = format(new UnitNumber(values[i], unitType, scale), locale, format);
i++;
}
return numbers;
}
public BigDecimal getBaseValue(double value, ScaleConstants scale) {
return new BigDecimal(value);
}
public BigDecimal getScaledValue(BigDecimal value, ScaleConstants targScale) {
return convert(value, targScale);
}
public UnitNumber parse(String val, Locale locale, ParseSpecifics specifics) throws ParseException {
return null;
}
private NumberFormat getSpecificFormatter() {
NumberFormat res = NumberFormat.getInstance();
res.setMaximumFractionDigits(1);
res.setMinimumFractionDigits(1);
return res;
}
}