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1 using System;
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2 using System.Collections.Generic;
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3
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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 DictionaryIndexListMapper<T> : IMapDataDestinationList
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10 {
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11 public DictionaryIndexListMapper(
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12 IDictionary<CompoundValue,T> dic,
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13 MapIndex index,
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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
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19 _fields = new NameOrIndexParameter[index.Fields.Length];
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20 _fromSource = new bool[index.Fields.Length];
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21
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22 for (int i = 0; i < _fields.Length; i++)
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23 {
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24 bool fromSource = index.Fields[i].ByName && index.Fields[i].Name[0] == '@';
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25
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26 _fields[i] = fromSource ? index.Fields[i].Name.Substring(1) : index.Fields[i];
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27 _fromSource[i] = fromSource;
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28 _isFromSource = _isFromSource || fromSource;
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29 _isFromDest = _isFromDest || !fromSource;
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30 }
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31 }
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32
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33 private readonly NameOrIndexParameter[] _fields;
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34 private readonly IDictionary<CompoundValue,T> _dic;
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35 private readonly bool[] _fromSource;
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36 private readonly bool _isFromSource;
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37 private readonly bool _isFromDest;
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38 private ObjectMapper _mapper;
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39 private object _newObject;
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40 private object[] _indexValue;
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41
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42 #region IMapDataDestinationList Members
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43
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44 private void AddObject()
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45 {
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46 if (_newObject != null)
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47 {
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48 if (_isFromDest)
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49 for (int i = 0; i < _fields.Length; i++)
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50 if (!_fromSource[i])
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51 _indexValue[i] = _mapper.TypeAccessor[_fields[i]].GetValue(_newObject);
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52
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53 _dic[new CompoundValue(_indexValue)] = (T)_newObject;
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54 }
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55 }
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56
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57 public virtual void InitMapping(InitContext initContext)
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58 {
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59 ISupportMapping sm = _dic as ISupportMapping;
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60
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61 if (sm != null)
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62 {
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63 sm.BeginMapping(initContext);
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64
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65 if (_mapper != initContext.ObjectMapper)
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66 _mapper = initContext.ObjectMapper;
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67 }
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68 }
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69
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70 [CLSCompliant(false)]
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71 public virtual IMapDataDestination GetDataDestination(InitContext initContext)
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72 {
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73 return _mapper;
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74 }
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75
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76 public virtual object GetNextObject(InitContext initContext)
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77 {
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78 AddObject();
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79
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80 _indexValue = new object[_fields.Length];
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81
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82 if (_isFromSource)
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83 for (int i = 0; i < _fields.Length; i++)
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84 if (_fromSource[i])
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85 _indexValue[i] = _fields[i].ByName ?
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86 initContext.DataSource.GetValue(initContext.SourceObject, _fields[i].Name) :
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87 initContext.DataSource.GetValue(initContext.SourceObject, _fields[i].Index);
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88
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89 return _newObject = _mapper.CreateInstance(initContext);
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90 }
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91
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92 public virtual void EndMapping(InitContext initContext)
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93 {
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94 AddObject();
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95
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96 ISupportMapping sm = _dic as ISupportMapping;
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97
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98 if (sm != null)
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99 sm.EndMapping(initContext);
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100 }
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101
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102 #endregion
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103 }
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104 }
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