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1 using System;
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2 using System.Collections;
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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 DictionaryListMapper : IMapDataDestinationList
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10 {
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11 public DictionaryListMapper(
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12 IDictionary 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 _fromSource = keyField.ByName && keyField.Name[0] == '@';
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19 _keyField = _fromSource? keyField.Name.Substring(1): keyField;
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20 }
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21
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22 private readonly IDictionary _dic;
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23 private readonly bool _fromSource;
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24 private NameOrIndexParameter _keyField;
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25 private ObjectMapper _mapper;
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26 private object _newObject;
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27 private object _keyValue;
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28
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29 #region IMapDataDestinationList Members
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30
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31 private void AddObject()
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32 {
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33 if (_newObject != null)
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34 {
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35 if (!_fromSource)
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36 _keyValue = _mapper.TypeAccessor[_keyField].GetValue(_newObject);
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37
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38 _dic[_keyValue] = _newObject;
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39 }
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40 }
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41
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42 public virtual void InitMapping(InitContext initContext)
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43 {
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44 ISupportMapping sm = _dic as ISupportMapping;
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45
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46 if (sm != null)
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47 {
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48 sm.BeginMapping(initContext);
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49
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50 if (_mapper != initContext.ObjectMapper)
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51 _mapper = initContext.ObjectMapper;
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52 }
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53 }
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54
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55 [CLSCompliant(false)]
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56 public virtual IMapDataDestination GetDataDestination(InitContext initContext)
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57 {
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58 return _mapper;
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59 }
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60
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61 static readonly char[] _trim = { ' ' };
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62
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63 public virtual object GetNextObject(InitContext initContext)
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64 {
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65 AddObject();
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66
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67 if (_fromSource)
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68 {
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69 _keyValue = _keyField.ByName ?
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70 initContext.DataSource.GetValue(initContext.SourceObject, _keyField.Name) :
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71 initContext.DataSource.GetValue(initContext.SourceObject, _keyField.Index);
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72
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73 if (Common.Configuration.TrimDictionaryKey && _keyValue is string)
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74 _keyValue = _keyValue.ToString().TrimEnd(_trim);
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75 }
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76
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77 return _newObject = _mapper.CreateInstance(initContext);
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78 }
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79
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80 public virtual void EndMapping(InitContext initContext)
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81 {
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82 AddObject();
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83
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84 ISupportMapping sm = _dic as ISupportMapping;
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85
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86 if (sm != null)
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87 sm.EndMapping(initContext);
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88 }
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89
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90 #endregion
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91 }
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92 }
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