/*
This file is part of Cyclos (www.cyclos.org).
A project of the Social Trade Organisation (www.socialtrade.org).
Cyclos 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; either version 2 of the License, or
(at your option) any later version.
Cyclos 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 Cyclos; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package nl.strohalm.cyclos.utils.conversion;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.ParseException;
import nl.strohalm.cyclos.utils.Amount;
import org.apache.commons.lang.StringUtils;
/**
* Converter for amounts
* @author luis
*/
public class AmountConverter implements Converter<Amount> {
private static final long serialVersionUID = -6090298605781552907L;
private final DecimalFormat numberFormat;
private final UnitsConverter unitsConverter;
public AmountConverter(final DecimalFormat numberFormat) {
this(numberFormat, "#amount#");
}
public AmountConverter(final DecimalFormat numberFormat, final String unitsPattern) {
this.numberFormat = numberFormat;
unitsConverter = new UnitsConverter(unitsPattern, numberFormat);
}
public String toString(final Amount amount) {
if (amount == null) {
return null;
}
switch (amount.getType()) {
case FIXED:
return unitsConverter.toString(amount.getValue());
case PERCENTAGE:
return numberFormat.format(amount.getValue()) + "%";
}
return null;
}
public Amount valueOf(final String string) {
if (StringUtils.isEmpty(string)) {
return null;
}
try {
final boolean percentage = string.endsWith("%");
BigDecimal amount;
Amount.Type type;
if (percentage) {
amount = CoercionHelper.coerce(BigDecimal.class, numberFormat.parse(string.substring(0, string.length() - 1)));
type = Amount.Type.PERCENTAGE;
} else {
amount = unitsConverter.valueOf(string.substring(0, string.length() - 1));
type = Amount.Type.FIXED;
}
return new Amount(amount, type);
} catch (final ParseException e) {
throw new ConversionException("Invalid number: " + string);
}
}
}