001/* Copyright (C) 2014 konik.io 002 * 003 * This file is part of the Konik library. 004 * 005 * The Konik library is free software: you can redistribute it and/or modify 006 * it under the terms of the GNU Affero General Public License as 007 * published by the Free Software Foundation, either version 3 of the 008 * License, or (at your option) any later version. 009 * 010 * The Konik library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 013 * GNU Affero General Public License for more details. 014 * 015 * You should have received a copy of the GNU Affero General Public License 016 * along with the Konik library. If not, see <http://www.gnu.org/licenses/>. 017 */ 018package io.konik.jaxb.adapter; 019 020import static java.lang.Integer.parseInt; 021import static java.lang.System.getProperty; 022import static java.math.RoundingMode.valueOf; 023import io.konik.zugferd.unqualified.Amount; 024 025import java.math.BigDecimal; 026import java.math.RoundingMode; 027 028import javax.xml.bind.annotation.adapters.XmlAdapter; 029 030/** 031 * 032 * Adapter to round the amount during marshalling to two decimals after the period. 033 * 034 * The scale and rounding mode can be overridden via the configuration. 035 * 036 * Defaults:: 037 * 038 * ---- 039 * io.konik.jaxb.adapter.AmountLowRoundingAdapter.scale=2 040 * io.konik.jaxb.adapter.AmountLowRoundingAdapter.roundingMode=HALF_UP 041 * ---- 042 * 043 */ 044public class AmountLowRoundingAdapter extends XmlAdapter<Amount, Amount> { 045 046 private static final String DEFAULT_SCALE = "2"; 047 private static final String DEFAULT_ROUNDING_MODE = "HALF_UP"; 048 049 private final int scale; 050 private final RoundingMode roundingMode; 051 052 /** 053 * Instantiates a new amount rounding adapter. 054 */ 055 public AmountLowRoundingAdapter() { 056 String name = this.getClass().getName(); 057 scale = parseInt(getProperty(name + ".scale", getDefaultScale())); 058 roundingMode = valueOf(getProperty(name + ".roundingMode", DEFAULT_ROUNDING_MODE)); 059 } 060 061 protected String getDefaultScale() { 062 return DEFAULT_SCALE; 063 } 064 065 @Override 066 public Amount unmarshal(Amount amount) throws Exception { 067 return amount; 068 } 069 070 @Override 071 public Amount marshal(Amount amount) throws Exception { 072 if (amount == null || amount.getValue() == null) { return amount; } 073 BigDecimal roundedValue = amount.getValue().setScale(scale, roundingMode).stripTrailingZeros(); 074 return amount.setValue(roundedValue); 075 } 076 077}