Amount.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.turro.financials.model;
 
import org.turro.math.Round;
 
public class Amount implements Comparable<Amount> {
 
  private Double tax, subtotal, discount, retained;
  private int fractionDigits;
  private AmountSet amountSet;
 
  public Amount(Double tax, Double subtotal, Double discount, Double retained, int fractionDigits) {
    this.tax = tax;
    this.subtotal = subtotal;
    this.discount = discount;
    this.retained = retained;
    this.fractionDigits = fractionDigits;
  }
 
  public void setAmountSet(AmountSet amountSet) {
    this.amountSet = amountSet;
  }
 
  public boolean isEmpty() {
    return subtotal == null || subtotal == 0 || subtotal.isNaN();
  }
 
  public void addTax(Double tax, Double subtotal, Double discount, Double retained) {
    this.tax = tax;
    this.subtotal += subtotal;
    this.discount += discount;
    this.retained += retained;
  }
 
  public Double getTax() {
    return tax;
  }
 
  public Double getRetained() {
    return retained;
  }
 
  public Double getDiscount() {
    return discount;
  }
 
  public Double getSubtotal() {
    return subtotal;
  }
 
  public Double getTaxable() {
    return new Round(subtotal - discount).decimals(fractionDigits).value();
  }
 
  public Double getTaxValue() {
    return (getAmount() + retained) - getTaxable();
  }
 
  public Double getAmount() {
//    if(amountSet.getOperatingModifier().isSumTax()) {
      return new Round((getTaxable() * (1.0 + tax / 100.0))).decimals(fractionDigits).value() - retained;
//    } else {
//      return new Round(getTaxable() - retained).decimals(fractionDigits).value();
//    }
  }
 
  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    final Amount other = (Amount) obj;
    if (this.tax != other.tax && (this.tax == null || !this.tax.equals(other.tax))) {
      return false;
    }
    return true;
  }
 
  @Override
  public int hashCode() {
    int hash = 3;
    hash = 97 * hash + (this.tax != null ? this.tax.hashCode() : 0);
    return hash;
  }
 
  @Override
  public int compareTo(Amount o) {
    return tax.compareTo(o.getTax());
  }
 
}