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