// Chromis POS - The New Face of Open Source POS
// Copyright (c) (c) 2015-2016
// http://www.chromis.co.uk
//
// This file is part of Chromis POS
//
// Chromis POS 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 3 of the License, or
// (at your option) any later version.
//
// Chromis POS 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 Chromis POS. If not, see <http://www.gnu.org/licenses/>.
package uk.chromis.pos.ticket;
import java.util.HashSet;
import java.util.Set;
/**
*
*
*/
public class Signumprovider {
private Set m_positives = new HashSet();
private Set m_negatives = new HashSet();
/** Creates a new instance of Signumprovider */
public Signumprovider() {
}
/**
*
* @param key
*/
public void addPositive(Object key) {
m_positives.add(key);
}
/**
*
* @param key
*/
public void addNegative(Object key) {
m_negatives.add(key);
}
/**
*
* @param key
* @param value
* @return
*/
public Double correctSignum(Object key, Double value) {
if (m_positives.contains(key)) {
return value.doubleValue() < 0.0 ? new Double(-value.doubleValue()) : value;
} else if (m_negatives.contains(key)) {
return value.doubleValue() > 0.0 ? new Double(-value.doubleValue()) : value;
} else {
return value;
}
}
}