private void CreatePropertyMap(PropertyInfo sourceProperty, List <PropertyInfo> targetProperties)
{
DataFilterAttribute dataFilterAttribute = sourceProperty.GetCustomAttribute <DataFilterAttribute>();
var targetPropertyName = dataFilterAttribute?.PropertyName;
if (string.IsNullOrEmpty(targetPropertyName))
{
targetPropertyName = sourceProperty.Name;
}
var targetProperty = FindTargetProperty(targetProperties, targetPropertyName);
if (targetProperty == null)
{
throw new InvalidOperationException(string.Format("在类型{0}上未找到{1}属性。", TargetType.FullName, targetPropertyName));
}
PropertyMap propertyMap = CreateMap(sourceProperty, targetProperty, dataFilterAttribute);
propertyMap.ComparisonType = dataFilterAttribute?.ComparisonType ?? ComparisonType.Equal;
_maps.Add(propertyMap);
}
private static PropertyMap CreateMap(PropertyInfo sourceProperty, PropertyInfo targetProperty, DataFilterAttribute dataFilterAttribute)
{
bool isEnumerable;
var sourceType = GetSourceRealType(sourceProperty.PropertyType, out isEnumerable);
var targetType = targetProperty.PropertyType;
targetType = Nullable.GetUnderlyingType(targetType) ?? targetType;
if (sourceType != targetType)
{
throw new InvalidOperationException("源字段与目标字段的类型不一致。");
}
if (isEnumerable && dataFilterAttribute != null && dataFilterAttribute.ComparisonType != ComparisonType.Equal)
{
throw new InvalidOperationException("In 语句只能使用相等操作符。");
}
Type propertyType = targetType;
PropertyMap propertyMap = new PropertyMap();
propertyMap.SourceProperty = sourceProperty;
propertyMap.TargetProperty = targetProperty;
propertyMap.IsEnumerable = isEnumerable;
propertyMap.PropertyType = propertyType;
propertyMap.SourceGetter = s_delegateFactory.CreateGet(sourceProperty);
propertyMap.IsNullable = targetProperty.PropertyType != targetType;
return(propertyMap);
}