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1   /*
2    * Copyright 2006 Christian Kalkhoff <me@ninan.info>
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *         http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package net.sf.plausj.bank.german.strategy.util;
18  
19  import net.sf.plausj.bank.german.AccountCode;
20  import net.sf.plausj.bank.german.util.MathHelper;
21  
22  /**
23   * Helper methods for Strategy00 alike strategies
24   * 
25   * @author ninan
26   * 
27   */
28  public class Strategy00AlikeHelper {
29  
30  	/**
31  	 * Calculates the sum of the digit iteration
32  	 * 
33  	 * @param accountCode
34  	 *            The account code to use
35  	 * @param multiplicators
36  	 *            The multiplicators
37  	 * @return The sum
38  	 */
39  	public static int calculateSum(AccountCode accountCode, int[] multiplicators) {
40  		int sum = 0;
41  
42  		for (int i = AccountCode.ACCOUNT_CODE_MAX_LENGTH - 2; i >= 0; --i) {
43  			int p = accountCode.getDigitAtPos(i) * multiplicators[i];
44  			if (p > 9) {
45  				p = MathHelper.calcCrossTotal(p);
46  			}
47  			sum += p;
48  		}
49  
50  		return sum;
51  	}
52  
53  	public static int getCheckDigitFromSum(int sum) {
54  		int ld = MathHelper.getLastDigits(sum, 1);
55  
56  		int cd = 0;
57  
58  		if (ld > 0)
59  			cd = 10 - ld;
60  
61  		return cd;
62  	}
63  
64  }