public static Delegate Get(Type type)
{
if (instance == null)
{
instance = new SpmReaderDelegates();
}
return(instance.GetDelegate(type));
}
private SpmAccessors()
{
Type itemType = typeof(TItem);
PropertyInfo[] properties = itemType.GetProperties(BindingFlags.Public |
BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static);
List <ISpmAccessor <TItem> > list = new List <ISpmAccessor <TItem> >(properties.Length);
for (int i = 0; i < properties.Length; i++)
{
PropertyInfo property = properties[i];
SpmAttribute mappedAttr = property.GetCustomAttribute <SpmAttribute>();
if (mappedAttr != null)
{
bool isNullable = false;
Type valueType = property.PropertyType;
if (valueType.IsGenericType && valueType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
// nullable type
valueType = Nullable.GetUnderlyingType(valueType);
isNullable = true;
}
if (valueType.IsEnum)
{
valueType = Enum.GetUnderlyingType(valueType);
}
Delegate readDelegate = SpmReaderDelegates.Get(valueType);
ISpmAccessor <TItem> accessor;
if (readDelegate == null)
{
// user type
// test for default constructor
if (valueType.GetConstructor(Type.EmptyTypes) == null)
{
throw new ArgumentException(String.Concat("Type \"", valueType.Name, " of property \"",
property.Name, "\" marked with SqlMapped must have default constructor"));
}
Type propertyAccessorType =
typeof(SpmComplexAccessor <,>).MakeGenericType(itemType, valueType);
accessor = (ISpmAccessor <TItem>)
Activator.CreateInstance(propertyAccessorType, property, mappedAttr);
}
else
{
// standard type
Type propertyAccessorType = isNullable ?
typeof(SpmNullableAccessor <,>).MakeGenericType(itemType, valueType) :
typeof(SpmAccessor <,>).MakeGenericType(itemType, valueType);
accessor = (ISpmAccessor <TItem>)
Activator.CreateInstance(propertyAccessorType, property, mappedAttr, readDelegate);
}
list.Add(accessor);
}
}
list.TrimExcess();
this.collection = new ReadOnlyCollection <ISpmAccessor <TItem> >(list);
}