1   /**
2    * Investor, the open-source investment library
3    *
4    * (C) Copyright 2008, by individual contributors as indicated by the @author tag.
5    *
6    * This library is free software; you can redistribute it and/or modify it
7    * under the terms of the GNU Lesser General Public License as
8    * published by the Free Software Foundation; either version 2.1 of
9    * the License, or (at your option) any later version.
10   *
11   * This software is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14   * Lesser General Public License for more details.
15   *
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this software; if not, write to the Free
18   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
19   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
20   */
21  package com.nickokiss.investor.function;
22  
23  import java.math.BigDecimal;
24  
25  import com.nickokiss.investor.calc.CashFlowStreamCalc;
26  import com.nickokiss.investor.calc.MathCalc;
27  import com.nickokiss.investor.fin.element.CashFlowStream;
28  import com.nickokiss.investor.fin.element.creator.StreamElementCreator;
29  import com.nickokiss.investor.util.TkFinConstructionException;
30  
31  /**
32   * 
33   * @author Tomasz Koscinski <tomasz.koscinski@nickokiss.com>
34   */
35  public class InfiniteStreamPVFunction implements Function {
36  
37    private MathCalc mathCalc = new MathCalc();
38    
39    private CashFlowStream cashFlowStream = null;
40    private StreamElementCreator streamElementCreator = null;
41    private BigDecimal nominalInterestRate = null;
42    
43    public InfiniteStreamPVFunction(CashFlowStream cashFlowStream, StreamElementCreator streamElementCreator, BigDecimal nominalInterestRate) {
44      this.cashFlowStream = cashFlowStream;
45      this.streamElementCreator = streamElementCreator;
46      this.nominalInterestRate = nominalInterestRate;
47    }
48  
49    @Override
50    public BigDecimal getValue(BigDecimal parameter) throws TkFinConstructionException {
51      int quantity = parameter.setScale(0, BigDecimal.ROUND_HALF_UP).intValue();
52      CashFlowStreamCalc calc = new CashFlowStreamCalc();
53      CashFlowStream cashFlowCycle = cashFlowStream.getCopy();
54      cashFlowCycle.addElements(streamElementCreator, quantity);
55      return calc.getInfinitePresentValue(cashFlowCycle, nominalInterestRate, mathCalc.ONE);
56    }
57  
58  }