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1 using System;
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2 using Castle.DynamicProxy;
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3 using IInterceptor = Castle.DynamicProxy.IInterceptor;
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4
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5 namespace BLToolkit.Mapping
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6 {
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7 public class LazyValueLoadInterceptor : IInterceptor
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8 {
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9 #region Fields
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10
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11 private readonly IObjectMapper _mapper;
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12 private readonly Func<IMapper, object, Type, object> _lazyLoader;
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13 private bool _intercepted;
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14
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15 #endregion
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16
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17 public LazyValueLoadInterceptor(IObjectMapper mapper, Func<IMapper, object, Type, object> lazyLoader)
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18 {
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19 _mapper = mapper;
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20 _lazyLoader = lazyLoader;
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21 }
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22
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23 public void Intercept(IInvocation invocation)
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24 {
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25 if (invocation.Method.Name.StartsWith("get_"))
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26 {
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27 string propertyName = invocation.Method.Name.Substring(4);
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28
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29 foreach (IMapper map in _mapper.PropertiesMapping)
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30 {
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31 if (map.PropertyName == propertyName)
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32 {
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33 if (!_intercepted)
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34 {
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35 _intercepted = true;
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36 map.Setter(invocation.Proxy, _lazyLoader(map, invocation.Proxy, invocation.TargetType));
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37 }
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38 break;
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39 }
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40 }
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41 }
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42
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43 // let the original call go through first, so we can notify *after*
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44 invocation.Proceed();
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45 }
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46 }
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47 } |
