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comparison Source/Mapping/DictionaryListMapperT.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 System.Diagnostics;
4 using BLToolkit.Common;
5 using BLToolkit.Reflection;
6
7 namespace BLToolkit.Mapping
8 {
9 public class DictionaryListMapper<K,T> : IMapDataDestinationList
10 {
11 public DictionaryListMapper(
12 IDictionary<K,T> dic,
13 NameOrIndexParameter keyField,
14 ObjectMapper objectMapper)
15 {
16 _dic = dic;
17 _mapper = objectMapper;
18 _keyGetter = MapGetData<K>.I;
19 _fromSource = keyField.ByName && keyField.Name[0] == '@';
20 _keyField = _fromSource? keyField.Name.Substring(1): keyField;
21 }
22
23 private readonly IDictionary<K,T> _dic;
24 private readonly bool _fromSource;
25 private readonly MapGetData<K>.MB<K> _keyGetter;
26 private NameOrIndexParameter _keyField;
27 private int _index;
28 private ObjectMapper _mapper;
29 private object _newObject;
30 private bool _typeMismatch;
31 private K _keyValue;
32
33 #region IMapDataDestinationList Members
34
35 private void AddObject()
36 {
37 if (_newObject != null)
38 {
39 if (_typeMismatch)
40 _keyValue = _mapper.MappingSchema.ConvertTo<K,object>(_mapper[_index].GetValue(_newObject));
41 else if (!_fromSource)
42 _keyValue = _keyGetter.From(_mapper, _newObject, _index);
43
44 _dic[_keyValue] = (T)_newObject;
45 }
46 }
47
48 public virtual void InitMapping(InitContext initContext)
49 {
50 var sm = _dic as ISupportMapping;
51
52 if (sm != null)
53 {
54 sm.BeginMapping(initContext);
55
56 if (_mapper != initContext.ObjectMapper)
57 _mapper = initContext.ObjectMapper;
58 }
59
60 if (_fromSource)
61 _index = _keyField.ByName? initContext.DataSource.GetOrdinal(_keyField.Name): _keyField.Index;
62 else
63 {
64 _index = _keyField.ByName? _mapper.GetOrdinal(_keyField.Name, true): _keyField.Index;
65
66 if (_index < 0)
67 throw new MappingException(
68 _keyField.ByName?
69 string.Format("Field '{0}' not found.", _keyField.Name):
70 string.Format("Index '{0}' is invalid.", _keyField.Index));
71
72 var mm = _mapper[_index];
73 _typeMismatch = !TypeHelper.IsSameOrParent(typeof(K), mm.Type);
74
75 #if !SILVERLIGHT
76
77 Debug.WriteLineIf(_typeMismatch, string.Format(
78 "Member {0} type '{1}' does not match dictionary key type '{2}'.",
79 mm.Name, mm.Type.Name, (typeof(K).Name)));
80
81 #endif
82 }
83 }
84
85 [CLSCompliant(false)]
86 public virtual IMapDataDestination GetDataDestination(InitContext initContext)
87 {
88 return _mapper;
89 }
90
91 static readonly char[] _trim = { ' ' };
92
93 public virtual object GetNextObject(InitContext initContext)
94 {
95 AddObject();
96
97 if (_fromSource)
98 {
99 _keyValue = _keyGetter.From(initContext.DataSource, initContext.SourceObject, _index);
100
101 if (Common.Configuration.TrimDictionaryKey && _keyValue is string)
102 _keyValue = (K)(object)_keyValue.ToString().TrimEnd(_trim);
103 }
104
105 return _newObject = _mapper.CreateInstance(initContext);
106 }
107
108 public virtual void EndMapping(InitContext initContext)
109 {
110 AddObject();
111
112 ISupportMapping sm = _dic as ISupportMapping;
113
114 if (sm != null)
115 sm.EndMapping(initContext);
116 }
117
118 #endregion
119 }
120 }