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1 using System;
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2 using System.Collections.Generic;
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3 using BLToolkit.Data;
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4 using BLToolkit.DataAccess;
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5 using BLToolkit.Emit;
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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 CollectionFullObjectMapper : TableDescription, IObjectMapper
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10 {
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11 private readonly DbManager _db;
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12 private readonly FactoryType _factoryType;
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13
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14 public CollectionFullObjectMapper(DbManager db, FactoryType factoryType)
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15 {
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16 _db = db;
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17 _factoryType = factoryType;
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18
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19 PropertiesMapping = new List<IMapper>();
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20 PrimaryKeyValueGetters = new List<GetHandler>();
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21 PrimaryKeyNames = new List<string>();
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22 }
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23
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24 public Type PropertyCollectionType { get; set; }
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25
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26 #region IMapper Members
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27
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28 public int DataReaderIndex { get; set; }
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29 public SetHandler Setter { get; set; }
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30 public Type PropertyType { get; set; }
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31 public string PropertyName { get; set; }
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32
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33 #endregion
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34
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35 #region IObjectMapper
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36
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37 public bool IsLazy { get; set; }
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38 public bool ContainsLazyChild { get; set; }
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39 public GetHandler Getter { get; set; }
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40
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41 public List<GetHandler> PrimaryKeyValueGetters { get; set; }
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42 public Association Association { get; set; }
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43
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44 public List<string> PrimaryKeyNames { get; set; }
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45
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46 #endregion
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47
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48 #region ILazyMapper
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49
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50 public GetHandler ParentKeyGetter { get; set; }
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51
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52 #endregion
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53
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54 public object CreateInstance()
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55 {
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56 object result = ContainsLazyChild
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57 ? (_factoryType == FactoryType.LazyLoading
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58 ? TypeFactory.LazyLoading.Create(PropertyType, this, LoadLazy)
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59 : TypeFactory.LazyLoadingWithDataBinding.Create(PropertyType, this, LoadLazy))
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60 : FunctionFactory.Remote.CreateInstance(PropertyType);
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61
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62 return result;
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63 }
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64
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65 private object LoadLazy(IMapper mapper, object proxy, Type parentType)
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66 {
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67 var lazyMapper = (ILazyMapper) mapper;
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68 object key = lazyMapper.ParentKeyGetter(proxy);
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69
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70 var fullSqlQuery = new FullSqlQuery(_db, true);
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71 object parentLoadFull = fullSqlQuery.SelectByKey(parentType, key);
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72 if (parentLoadFull == null)
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73 {
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74 object value = Activator.CreateInstance(mapper is CollectionFullObjectMapper
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75 ? (mapper as CollectionFullObjectMapper).PropertyCollectionType
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76 : mapper.PropertyType);
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77 return value;
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78 }
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79
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80 var objectMapper = (IObjectMapper) mapper;
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81 return objectMapper.Getter(parentLoadFull);
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82 }
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83
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84 #region IPropertiesMapping Members
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85
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86 public List<IMapper> PropertiesMapping { get; private set; }
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87 public IPropertiesMapping ParentMapping { get; set; }
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88
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89 #endregion
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90 }
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91 } |
