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1 using System;
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2 using System.Linq;
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3 using BLToolkit.Common;
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4 using BLToolkit.Properties;
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5
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6 namespace BLToolkit.Mapping
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7 {
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8 public class MapIndex
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9 {
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10 public MapIndex(string[] names)
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11 {
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12 if (null == names)
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13 throw new ArgumentNullException("names");
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14
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15 if (names.Length == 0)
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16 throw new ArgumentException(Resources.MapIndex_EmptyNames, "names");
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17
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18 Fields = NameOrIndexParameter.FromStringArray(names);
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19 }
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20
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21 public MapIndex(int[] indices)
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22 {
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23 if (null == indices)
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24 throw new ArgumentNullException("indices");
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25
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26 if (indices.Length == 0)
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27 throw new ArgumentException(Resources.MapIndex_EmptyIndices, "indices");
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28
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29 Fields = NameOrIndexParameter.FromIndexArray(indices);
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30 }
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31
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32 public MapIndex(params NameOrIndexParameter[] fields)
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33 {
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34 if (null == fields)
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35 throw new ArgumentNullException("fields");
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36
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37 if (fields.Length == 0)
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38 throw new ArgumentException(Resources.MapIndex_EmptyFields, "fields");
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39
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40 Fields = fields;
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41 }
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42
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43 public NameOrIndexParameter[] Fields { get; private set; }
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44
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45 private string _id;
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46 public string ID
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47 {
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48 get { return _id ?? (_id = string.Join(".", Fields.Select(_ => _.ToString()).ToArray())); }
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49 }
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50
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51 [CLSCompliant(false)]
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52 public object GetValue(IMapDataSource source, object obj, int index)
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53 {
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54 if (source == null)
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55 throw new ArgumentNullException("source");
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56
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57 var value = Fields[index].ByName?
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58 source.GetValue(obj, Fields[index].Name):
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59 source.GetValue(obj, Fields[index].Index);
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60
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61 if (value == null)
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62 {
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63 var objectMapper = source as ObjectMapper;
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64
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65 if (objectMapper != null)
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66 {
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67 var mm = Fields[index].ByName?
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68 objectMapper[Fields[index].Name]: objectMapper[Fields[index].Index];
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69
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70 if (mm == null)
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71 throw new MappingException(string.Format(Resources.MapIndex_BadField,
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72 objectMapper.TypeAccessor.OriginalType.Name, Fields[index]));
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73 }
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74 }
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75
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76 return value;
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77 }
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78
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79 [CLSCompliant(false)]
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80 public object GetValueOrIndex(IMapDataSource source, object obj)
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81 {
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82 return Fields.Length == 1?
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83 GetValue(source, obj, 0):
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84 GetIndexValue(source, obj);
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85 }
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86
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87 [CLSCompliant(false)]
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88 public CompoundValue GetIndexValue(IMapDataSource source, object obj)
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89 {
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90 var values = new object[Fields.Length];
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91
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92 for (var i = 0; i < values.Length; i++)
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93 values[i] = GetValue(source, obj, i);
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94
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95 return new CompoundValue(values);
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96 }
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97 }
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98 }
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99
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