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(* Copyright 2013 Ian Hinder
This file is part of Kranc.
Kranc is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kranc is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kranc; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
BeginPackage["Object`", {"Errors`", "Helpers`", "Kranc`"}];
NewObject;
SetObjectField;
GetObjectField;
AppendObjectField;
JoinObjectField;
Begin["`Private`"];
(* Low-level functions *)
DefFn[
NewObject[class_Symbol, initList_List] :=
Apply[class, initList]];
DefFn[
keys[obj_] :=
Sort[Map[First, obj]]];
DefFn[
hasValueQ[obj_, field_] :=
MemberQ[keys[obj], field]];
DefFn[
SetObjectField[obj_, field_String, value_] :=
If[Length[Cases[obj, HoldPattern[field -> _]]] > 0,
Replace[obj, (field -> _) :> field -> value, {1}],
Append[obj, field -> value]]];
DefFn[
GetObjectField[obj_, field_String] :=
Cases[obj, (field -> value_) :> value][[1]]];
(* High level functions *)
DefFn[
AppendObjectField[obj_, field_String, value_] :=
SetObjectField[obj, field, Append[GetObjectField[obj, field], value]]];
DefFn[
JoinObjectField[obj_, field_String, values_List] :=
SetObjectField[obj, field, Join[GetObjectField[obj, field], values]]];
End[];
EndPackage[];
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