69 lines
1.8 KiB
Java
69 lines
1.8 KiB
Java
// uniCenta oPOS - Touch Friendly Point Of Sale
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// Copyright (c) 2009-2017 uniCenta
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// https://unicenta.com
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//
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// This file is part of uniCenta oPOS
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//
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// uniCenta oPOS is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// uniCenta oPOS is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with uniCenta oPOS. If not, see <http://www.gnu.org/licenses/>.
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package com.unicenta.pos.ticket;
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import java.util.*;
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/**
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*
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* @author JG uniCenta
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*/
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public class Signumprovider {
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private Set m_positives = new HashSet();
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private Set m_negatives = new HashSet();
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/** Creates a new instance of Signumprovider */
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public Signumprovider() {
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}
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/**
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*
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* @param key
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*/
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public void addPositive(Object key) {
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m_positives.add(key);
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}
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/**
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*
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* @param key
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*/
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public void addNegative(Object key) {
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m_negatives.add(key);
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}
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/**
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*
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* @param key
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* @param value
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* @return
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*/
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public Double correctSignum(Object key, Double value) {
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if (m_positives.contains(key)) {
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return value.doubleValue() < 0.0 ? new Double(-value.doubleValue()) : value;
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} else if (m_negatives.contains(key)) {
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return value.doubleValue() > 0.0 ? new Double(-value.doubleValue()) : value;
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} else {
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return value;
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}
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}
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}
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