bool Equals(ArrayKey <T> other)
{
if (other == null)
{
return(false);
}
if (other._hashCode != _hashCode)
{
return(false);
}
if (other._keys.Length != _keys.Length)
{
return(false);
}
for (int i = 0; i < _keys.Length; i++)
{
if (!object.Equals(_keys[i], other._keys[i]))
{
return(false);
}
}
return(true);
}
// Automagically guess the property relationships between various POCOs and create a delegate that will set them up
public static object GetAutoMapper(Type[] types)
{
// Build a key
var key = new ArrayKey <Type>(types);
return(AutoMappers.Get(key, () =>
{
// Create a method
var m = new DynamicMethod("petapoco_automapper", types[0], types, true);
var il = m.GetILGenerator();
for (int i = 1; i < types.Length; i++)
{
bool handled = false;
for (int j = i - 1; j >= 0; j--)
{
// Find the property
var candidates = from p in types[j].GetProperties() where p.PropertyType == types[i] select p;
if (candidates.Count() == 0)
{
continue;
}
if (candidates.Count() > 1)
{
throw new InvalidOperationException(string.Format("Can't auto join {0} as {1} has more than one property of type {0}", types[i], types[j]));
}
// Generate code
il.Emit(OpCodes.Ldarg_S, j);
il.Emit(OpCodes.Ldarg_S, i);
il.Emit(OpCodes.Callvirt, candidates.First().GetSetMethod(true));
handled = true;
}
if (!handled)
{
throw new InvalidOperationException(string.Format("Can't auto join {0}", types[i]));
}
}
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ret);
// Cache it
return m.CreateDelegate(Expression.GetFuncType(types.Concat(types.Take(1)).ToArray()));
}
));
}
