/* Copyright (C) 2014 konik.io
*
* This file is part of the Konik library.
*
* The Konik library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* The Konik 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with the Konik library. If not, see <http://www.gnu.org/licenses/>.
*/
package io.konik.jaxb.adapter;
import static java.lang.Integer.parseInt;
import static java.math.RoundingMode.valueOf;
import io.konik.Configuration;
import io.konik.zugferd.unqualified.Amount;
import java.math.BigDecimal;
import java.math.RoundingMode;
import javax.xml.bind.annotation.adapters.XmlAdapter;
/**
*
* Adapter to round the amount during marshalling to two decimals after the period.
*
* The scale and rounding mode can be overridden via the configuration.
*
* Defaults::
*
* ----
* io.konik.jaxb.adapter.TwoDigitRoundingAdapter.scale=2
* io.konik.jaxb.adapter.TwoDigitRoundingAdapter.roundingMode=HALF_UP
* ----
*/
public class TwoDigitRoundingAdapter extends XmlAdapter<Amount, Amount> {
private static final String DEFAULT_SCALE = "2";
private static final String DEFAULT_ROUNDING_MODE = "HALF_UP";
private final int scale;
private final RoundingMode roundingMode;
private boolean stripTrailingZeros;
/**
* Instantiates a new amount rounding adapter.
*/
public TwoDigitRoundingAdapter() {
String name = this.getClass().getName();
scale = parseInt(Configuration.INSTANCE.getProperty(name + ".scale", getDefaultScale()));
roundingMode = valueOf(Configuration.INSTANCE.getProperty(name + ".roundingMode", DEFAULT_ROUNDING_MODE));
stripTrailingZeros = Configuration.INSTANCE.stripTrailingZeros();
}
protected String getDefaultScale() {
return DEFAULT_SCALE;
}
@Override
public Amount unmarshal(Amount amount) throws Exception {
return amount;
}
@Override
public Amount marshal(Amount amount) throws Exception {
if (amount == null || amount.getValue() == null) { return amount; }
return amount.setValue(round(amount));
}
private BigDecimal round(Amount amount) {
BigDecimal rounded = amount.getValue().setScale(scale, roundingMode);
if (stripTrailingZeros) { return rounded.stripTrailingZeros(); }
return rounded;
}
}