internal Accessor(PropertyInfo pi, DGet <T, V> dget, DSet <T, V> dset, DRSet <T, V> drset, MetaAccessor <T, V2> storage)
{
this.pi = pi;
this.dget = dget;
this.dset = dset;
this.drset = drset;
this.storage = storage;
}
internal static MetaAccessor Create(Type objectType, PropertyInfo pi, MetaAccessor storageAccessor)
{
Delegate dset = null;
Delegate drset = null;
Type dgetType = typeof(DGet <,>).MakeGenericType(objectType, pi.PropertyType);
MethodInfo getMethod = pi.GetGetMethod(true);
Delegate dget = Delegate.CreateDelegate(dgetType, getMethod, true);
if (dget == null)
{
throw Error.CouldNotCreateAccessorToProperty(objectType, pi.PropertyType, pi);
}
if (pi.CanWrite)
{
if (!objectType.IsValueType)
{
dset = Delegate.CreateDelegate(typeof(DSet <,>).MakeGenericType(objectType, pi.PropertyType), pi.GetSetMethod(true), true);
}
else
{
DynamicMethod mset = new DynamicMethod(
"xset_" + pi.Name,
typeof(void),
new Type[] { objectType.MakeByRefType(), pi.PropertyType },
true
);
ILGenerator gen = mset.GetILGenerator();
gen.Emit(OpCodes.Ldarg_0);
if (!objectType.IsValueType)
{
gen.Emit(OpCodes.Ldind_Ref);
}
gen.Emit(OpCodes.Ldarg_1);
gen.Emit(OpCodes.Call, pi.GetSetMethod(true));
gen.Emit(OpCodes.Ret);
drset = mset.CreateDelegate(typeof(DRSet <,>).MakeGenericType(objectType, pi.PropertyType));
}
}
Type saType = (storageAccessor != null) ? storageAccessor.Type : pi.PropertyType;
return((MetaAccessor)Activator.CreateInstance(
typeof(Accessor <, ,>).MakeGenericType(objectType, pi.PropertyType, saType),
BindingFlags.Instance | BindingFlags.NonPublic, null,
new object[] { pi, dget, dset, drset, storageAccessor }, null
));
}