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comparison Extensions/JointureAddOn/Mapping/ValueMapper.cs @ 0:f990fcb411a9

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Копия текущей версии из github
author cin
date Thu, 27 Mar 2014 21:46:09 +0400
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-1:000000000000 0:f990fcb411a9
1 using System;
2 using System.Collections.Generic;
3 using BLToolkit.Emit;
4
5 namespace BLToolkit.Mapping
6 {
7 public class ValueMapper : TableDescription, IMapper
8 {
9 private readonly Dictionary<string, List<string>> _columnVariations = new Dictionary<string, List<string>>();
10 private readonly Dictionary<string, int> _columnOccurences = new Dictionary<string, int>();
11
12 public string ColumnAlias { get; set; }
13 public string ColumnName { get; set; }
14
15 #region IMapper Members
16
17 public int DataReaderIndex { get; set; }
18 public SetHandler Setter { get; set; }
19 public Type PropertyType { get; set; }
20 public string PropertyName { get; set; }
21
22 #endregion
23
24 public string GetColumnName(string columnName)
25 {
26 int occurenceCount;
27 if (_columnOccurences.ContainsKey(columnName))
28 {
29 occurenceCount = _columnOccurences[columnName] + 1;
30 _columnOccurences[columnName] = occurenceCount;
31 }
32 else
33 {
34 _columnOccurences[columnName] = 1;
35 occurenceCount = 1;
36 }
37
38 string res = columnName + (occurenceCount > 1 ? string.Format("_{0}", occurenceCount - 1) : "");
39
40 var variations = new List<string>();
41 if (_columnVariations.ContainsKey(columnName))
42 {
43 variations = _columnVariations[columnName];
44 }
45
46 variations.Add(res);
47 _columnVariations[columnName] = variations;
48
49 return res;
50 }
51
52 public bool SetDataReaderIndex(List<string> schemaColumns)
53 {
54 string colName = ColumnName;
55 int index = -1;
56 if (!schemaColumns.Contains(colName))
57 {
58 bool found = false;
59 int order = 1;
60 foreach (string key in _columnVariations.Keys)
61 {
62 List<string> variations = _columnVariations[key];
63 if (variations.Contains(colName))
64 {
65 if (colName.Contains(key + "_"))
66 {
67 string orderString = colName.Replace(key + "_", "");
68 order = int.Parse(orderString) + 1;
69 colName = key;
70 found = true;
71 break;
72 }
73 }
74 }
75 if (found)
76 {
77 int i = 0, occurenceCnt = 0;
78 foreach (string column in schemaColumns)
79 {
80 if (column == colName)
81 {
82 occurenceCnt++;
83 if (occurenceCnt == order)
84 {
85 index = i;
86 break;
87 }
88 }
89 i++;
90 }
91 }
92 else
93 {
94 // TODO Check this condition...
95 //if (!_ignoreMissingColumns)
96 //{
97 // throw new Exception(string.Format("Couldnt find db column {0} in the query result", colName));
98 //}
99 return true;
100 }
101 }
102 else
103 index = schemaColumns.IndexOf(colName);
104
105 DataReaderIndex = index;
106 return false;
107 }
108 }
109 }