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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;
18  
19  import net.sf.plausj.bank.german.AccountCode;
20  import net.sf.plausj.bank.german.BankCode;
21  import net.sf.plausj.bank.german.CheckDigit;
22  import net.sf.plausj.bank.german.strategy.util.Strategy06AlikeHelper;
23  
24  /**
25   * @author ninan
26   * 
27   */
28  public class Strategy90 implements Strategy {
29  
30  	private static final int[] multiplicatorsMethodA = new int[] { 0, 0, 0, 7,
31  			6, 5, 4, 3, 2 };
32  
33  	private static final int[] multiplicatorsMethodB = new int[] { 0, 0, 0, 0,
34  			6, 5, 4, 3, 2 };
35  
36  	private static final int[] multiplicatorsMethodC = new int[] { 0, 0, 0, 0,
37  			6, 5, 4, 3, 2 };
38  
39  	private static final int[] multiplicatorsMethodD = new int[] { 0, 0, 0, 0,
40  			6, 5, 4, 3, 2 };
41  
42  	private static final int[] multiplicatorsMethodE = new int[] { 0, 0, 0, 0,
43  			2, 1, 2, 1, 2 };
44  
45  	private static final int[] multiplicatorsMethodF = new int[] { 0, 0, 8, 7,
46  			6, 5, 4, 3, 2 };
47  
48  	/**
49  	 * @see net.sf.plausj.bank.german.strategy.Strategy#calculateCheckDigit(net.sf.plausj.bank.german.BankCode,
50  	 *      net.sf.plausj.bank.german.AccountCode)
51  	 */
52  	public CheckDigit calculateCheckDigit(final BankCode bankCode,
53  			final AccountCode accountCode) {
54  
55  		if (9 == accountCode.getDigitAtPos(2)) {
56  			// Sachkonten
57  			return calculateCheckDigitMethodF(accountCode);
58  		} else {
59  			// Kundenkonten
60  			CheckDigit cd = calculateCheckDigitMethodA(accountCode);
61  			if (!accountCode.matchesCheckDigit(cd)) {
62  				cd = calculateCheckDigitMethodB(accountCode);
63  				if (!accountCode.matchesCheckDigit(cd)) {
64  					cd = calculateCheckDigitMethodC(accountCode);
65  					if (!accountCode.matchesCheckDigit(cd)) {
66  						cd = calculateCheckDigitMethodD(accountCode);
67  						if (!accountCode.matchesCheckDigit(cd)) {
68  							cd = calculateCheckDigitMethodE(accountCode);
69  						}
70  					}
71  				}
72  			}
73  			return cd;
74  		}
75  	}
76  
77  	private CheckDigit calculateCheckDigitMethodA(final AccountCode accountCode) {
78  
79  		int sum = Strategy06AlikeHelper.calculateSum(accountCode,
80  				multiplicatorsMethodA);
81  		int cd = Strategy06AlikeHelper.getCheckDigitFromSum(sum);
82  		return new CheckDigit(9, cd);
83  
84  	}
85  
86  	private CheckDigit calculateCheckDigitMethodB(final AccountCode accountCode) {
87  
88  		int sum = Strategy06AlikeHelper.calculateSum(accountCode,
89  				multiplicatorsMethodB);
90  		int cd = Strategy06AlikeHelper.getCheckDigitFromSum(sum);
91  		return new CheckDigit(9, cd);
92  
93  	}
94  
95  	private CheckDigit calculateCheckDigitMethodC(final AccountCode accountCode) {
96  
97  		int sum = Strategy06AlikeHelper.calculateSum(accountCode,
98  				multiplicatorsMethodC);
99  		int mod = sum % 7;
100 		int cd = mod == 0 ? 0 : 7 - mod;
101 		return new CheckDigit(9, cd);
102 
103 	}
104 
105 	private CheckDigit calculateCheckDigitMethodD(final AccountCode accountCode) {
106 
107 		int sum = Strategy06AlikeHelper.calculateSum(accountCode,
108 				multiplicatorsMethodD);
109 		int mod = sum % 9;
110 		int cd = mod == 0 ? 0 : 9 - mod;
111 		return new CheckDigit(9, cd);
112 
113 	}
114 
115 	private CheckDigit calculateCheckDigitMethodE(final AccountCode accountCode) {
116 
117 		int sum = Strategy06AlikeHelper.calculateSum(accountCode,
118 				multiplicatorsMethodE);
119 		int mod = sum % 10;
120 		int cd = mod == 0 ? 0 : 10 - mod;
121 		return new CheckDigit(9, cd);
122 
123 	}
124 
125 	private CheckDigit calculateCheckDigitMethodF(final AccountCode accountCode) {
126 
127 		int sum = Strategy06AlikeHelper.calculateSum(accountCode,
128 				multiplicatorsMethodF);
129 		int cd = Strategy06AlikeHelper.getCheckDigitFromSum(sum);
130 		return new CheckDigit(9, cd);
131 
132 	}
133 
134 }