DepreciationMap.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.asset;
 
import java.util.Date;
import java.util.TreeMap;
import org.amic.util.date.DateRange;
 
public class DepreciationMap extends TreeMap<Date, DepreciationEntry> {
 
  public double getToDepreciate(double investment, Date initialDate, Date finalDate) {
    double toDepreciate = 0.0;
    Date initialPeriod = null;
    DepreciationEntry de = null;
    for(Date finalPeriod : keySet()) {
      if(finalPeriod.after(finalDate)) {
        break;
      }
      if(de != null && initialPeriod != null) {
        Date range[] = DateRange.getFinalRange(initialDate, finalDate, initialPeriod, finalPeriod);
        if(range != null) {
          toDepreciate += daysBetween(range[0], range[1]) * (investment * (de.getPercent() / 365.0 / 100.0));
        }
//        if(initialDate == null || initialPeriod.after(initialDate)) {
//          toDepreciate += daysBetween(initialPeriod, finalPeriod) * (investment * (de.getPercent() / 365.0 / 100.0));
//        } else if((initialPeriod.before(initialDate) || initialPeriod.equals(initialDate)) && finalPeriod.after(initialDate)) {
//          toDepreciate += daysBetween(initialDate, finalPeriod) * (investment * (de.getPercent() / 365.0 / 100.0));
//        }
      }
      de = get(finalPeriod);
      initialPeriod = finalPeriod;
    }
    if(de != null && initialPeriod != null) {
      Date range[] = DateRange.getFinalRange(initialDate, finalDate, initialPeriod, finalDate);
      if(range != null) {
        toDepreciate += daysBetween(range[0], range[1]) * (investment * (de.getPercent() / 365.0 / 100.0));
      }
//      if(initialDate == null || initialPeriod.after(initialDate)) {
//        toDepreciate += daysBetween(initialPeriod, finalDate) * (investment * (de.getPercent() / 365.0 / 100.0));
//      } else if((initialPeriod.before(initialDate) || initialPeriod.equals(initialDate)) && finalDate.after(initialDate)) {
//        toDepreciate += daysBetween(initialDate, finalDate) * (investment * (de.getPercent() / 365.0 / 100.0));
//      }
    }
    return Math.abs(toDepreciate) <= Math.abs(investment) ? toDepreciate : investment;
  }
 
  static final double ONE_HOUR = 60 * 60 * 1000L;
  public static double daysBetween(Date d1, Date d2){
    return ( (d2.getTime() - d1.getTime() + ONE_HOUR) /
                  (ONE_HOUR * 24));
  }
  
}