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2010-08-26 13:40:50 +01:00
%%% -*- Mode: Prolog; -*-
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
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% $Date: 2011-11-28 14:41:26 +0100 (Mon, 28 Nov 2011) $
% $Revision: 6764 $
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%
% This file is part of ProbLog
% http://dtai.cs.kuleuven.be/problog
%
% ProbLog was developed at Katholieke Universiteit Leuven
%
% Copyright 2008, 2009, 2010
% Katholieke Universiteit Leuven
%
% Main authors of this file:
% Theofrastos Mantadelis
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Artistic License 2.0
%
% Copyright (c) 2000-2006, The Perl Foundation.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% To define flags do: defined_flag(Flag, Type, Description, DefaultValue).
% Available predifined types:
% flag_validate_dummy
% flag_validate_atom
% flag_validate_atomic
% flag_validate_number
% flag_validate_integer
% flag_validate_directory
% flag_validate_file
% flag_validate_in_list(L)
% flag_validate_in_interval(I, Type)
% flag_validate_in_interval_closed(I)
% flag_validate_in_interval_open(I)
% flag_validate_in_interval_left_open(I)
% flag_validate_in_interval_right_open(I)
% flag_validate_integer_in_interval_closed(I)
% flag_validate_integer_in_interval_open(I)
% flag_validate_integer_in_interval_left_open(I)
% flag_validate_integer_in_interval_right_open(I)
% flag_validate_float_in_interval_closed(I)
% flag_validate_float_in_interval_open(I)
% flag_validate_float_in_interval_left_open(I)
% flag_validate_float_in_interval_right_open(I)
% flag_validate_posnumber
% flag_validate_posint
% flag_validate_nonegint
% flag_validate_boolean
% flag_validate_switch
%
:-module(gflags, [flag_define/4,
flag_define/5,
flag_define/6,
flag_add_validation_syntactic_sugar/2,
flag_group_defined/1, % messaging purposes
flag_defined/5, % messaging purposes
flag_set/2,
flag_store/2, % sets flag with no validation, useful for handler
flag_get/2,
flags_reset/0]).
:- use_module(library(lists), [append/3, memberchk/2, reverse/2]).
:- use_module(library(system), [delete_file/1, file_exists/1, file_property/2, make_directory/1]). % for file operations
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flag_define(Flag, Type, DefaultValue, Message):-
flag_define(Flag, general, Type, DefaultValue, flags:true, Message).
flag_define(Flag, Group, Type, DefaultValue, Message):-
flag_define(Flag, Group, Type, DefaultValue, flags:true, Message).
flag_define(Flag, Group, Type, DefaultValue, Handler, Message):-
recorded(flags, defined_flag(Flag, _Group, _Type, _DefaultValue, _Handler, _Message), _Ref),
throw(duplicate_flag_definition(flag_define(Flag, Group, Type, DefaultValue, Handler, Message))).
flag_define(Flag, Group, Type, DefaultValue, Handler, Message):-
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(catch(Type, _, fail)->
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fail
;
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\+ (flag_validation_syntactic_sugar(Type, SyntacticSugar), catch(SyntacticSugar, _, fail)),
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throw(unknown_flag_type(flag_define(Flag, Group, Type, DefaultValue, Handler, Message)))
).
flag_define(Flag, Group, Type, DefaultValue, Handler, Message):-
\+ Handler = _M:_Atom,
throw(non_module_aware_flag_handler(flag_define(Flag, Group, Type, DefaultValue, Handler, Message))).
flag_define(Flag, Group, Type, DefaultValue, M:Handler, Message):-
\+ (callable(Handler), atom(Handler), atom(M)),
throw(non_callable_atom_flag_handler(flag_define(Flag, Group, Type, DefaultValue, M:Handler, Message))).
flag_define(Flag, Group, Type, DefaultValue, Handler, Message):-
\+ flag_validate(Flag, DefaultValue, Type, Handler),
throw(erroneous_flag_default_value(flag_define(Flag, Group, Type, DefaultValue, Handler, Message))).
flag_define(_Flag, Group, Type, DefaultValue, Handler, Message):-
\+ Group == general,
(var(Group) ->
throw(erroneous_flag_group(flag_define(_Flag, Group, Type, DefaultValue, Handler, Message)))
;
recordzifnot(flags, flag_group(Group), _Ref),
fail
).
flag_define(Flag, Group, Type, DefaultValue, Handler, Message):-
recordz(flags, defined_flag(Flag, Group, Type, DefaultValue, Handler, Message), Ref),
(catch(flag_set(Flag, DefaultValue), Exception, (erase(Ref), throw(Exception))) ->
true
;
erase(Ref),
throw(handler_error(flag_define(Flag, Group, Type, DefaultValue, Handler, Message)))
).
flag_group_defined(general).
flag_group_defined(Group):-
recorded(flags, flag_group(Group), _Ref).
flag_defined(Flag, Group, DefaultValue, Domain, Message):-
recorded(flags, defined_flag(Flag, Group, Type, DefaultValue, Handler, Message), _Ref),
flag_get_domain_message(Type, Handler, Domain).
flag_get_domain_message(Type, M:Handler, Message):-
validation_type_values(Type, Domain),
(Handler == true ->
Message = Domain
;
Goal =.. [Handler, message, CustomDomain],
call(M:Goal),
((nonvar(CustomDomain), CustomDomain \= '') ->
(Domain == '' ->
Message = CustomDomain
;
atomic_concat([CustomDomain, '/', Domain], Message)
)
;
Message = Domain
)
).
flag_set(Flag, _Value):-
var(Flag), throw(not_defined_flag_exception('free variable')).
flag_set(Flag, _Value):-
\+ recorded(flags, defined_flag(Flag, _Group, _Type, _DefaultValue, _Handler, _Message), _Ref),
throw(not_defined_flag_exception(Flag)).
flag_set(Flag, Value):-
recorded(flags, defined_flag(Flag, _Group, Type, _DefaultValue, M:Handler, _Message), _Ref),
(Handler == true ->
GoalValidated = true,
GoalStored = true
;
GoalValidated =.. [Handler, validated, Value],
GoalStored =.. [Handler, stored, Value]
),
flag_validate(Flag, Value, Type, M:Handler),
call(M:GoalValidated),
flag_store(Flag, Value),
call(M:GoalStored).
flag_get(Flag, Value):-
recorded(flag_values, flag(Flag, Value), _Ref).
flag_store(Flag, Value):-
(recorded(flag_values, flag(Flag, _), Ref) ->
erase(Ref)
;
true
),
recordz(flag_values, flag(Flag, Value), _Ref).
flags_reset:-
recorded(flags, defined_flag(Flag, _Group, _Type, DefaultValue, _Handler, _Message), _Ref),
flag_set(Flag, DefaultValue),
fail.
flags_reset.
flag_validate(_Flag, Value, _Type, M:Handler):-
Handler \= true,
GoalValidate =.. [Handler, validate, Value],
call(M:GoalValidate), !.
flag_validate(_Flag, Value, Type, M:Handler):-
Handler \= true,
GoalValidating =.. [Handler, validating, Value],
Type =.. LType,
append(LType, [Value], LGoal),
G =.. LGoal,
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catch((M:GoalValidating, G), _, fail), !.
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flag_validate(_Flag, Value, Type, _M:Handler):-
Handler == true,
Type =.. LType,
append(LType, [Value], LGoal),
G =.. LGoal,
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catch(G, _, fail), !.
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flag_validate(_Flag, Value, SyntacticSugar, M:Handler):-
Handler \= true,
GoalValidating =.. [Handler, validating, Value],
flag_validation_syntactic_sugar(SyntacticSugar, Type),
Type =.. LType,
append(LType, [Value], LGoal),
G =.. LGoal,
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catch((M:GoalValidating, G), _, fail), !.
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flag_validate(_Flag, Value, SyntacticSugar, _M:Handler):-
Handler == true,
flag_validation_syntactic_sugar(SyntacticSugar, Type),
Type =.. LType,
append(LType, [Value], LGoal),
G =.. LGoal,
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catch(G, _, fail), !.
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flag_validate(Flag, Value, Type, Handler):-
(var(Value) ->
Value = 'free variable'
;
true
),
flag_get_domain_message(Type, Handler, Domain),
throw(out_of_domain_exception(Flag, Value, Domain)).
%
% The validation predicates
%
flag_validate_dummy.
flag_validate_dummy(Value):-
nonvar(Value).
flag_validate_atom.
flag_validate_atom(Value):-
atom(Value).
flag_validate_atomic.
flag_validate_atomic(Value):-
atomic(Value).
flag_validate_number.
flag_validate_number(Value):-
number(Value).
flag_validate_integer.
flag_validate_integer(Value):-
integer(Value).
flag_validate_directory.
flag_validate_directory(Value):-
atomic(Value),
catch(file_exists(Value), _, fail),
file_property(Value, type(directory)), !.
flag_validate_directory(Value):-
atomic(Value),
% fixme : why not inform the user???
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catch((\+ file_exists(Value), make_directory(Value)), _, fail).
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flag_validate_file.
flag_validate_file(Value):-
catch(file_exists(Value), _, fail), file_property(Value, type(regular)), !.
flag_validate_file(Value):-
atomic(Value),
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catch((\+ file_exists(Value), tell(Value)), _, fail),
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told,
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catch(delete_file(Value),_, fail).
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flag_validate_in_list(Domain):-
is_list(Domain), ground(Domain), \+ Domain = [].
flag_validate_in_list(Domain, Value):-
ground(Value),
memberchk(Value, Domain).
flag_validate_in_interval([L, U], Type):-
nonvar(Type),
(Type = number ->
number(L), number(U), L =< U
;
(Type = float ->
float(L), float(U), L =< U
;
Type = integer, integer(L), integer(U), L =< U
)
).
flag_validate_in_interval((L, U), Type):-
nonvar(Type),
(Type = number ->
number(L), number(U), L < U
;
(Type = float ->
float(L), float(U), L < U
;
Type = integer, (integer(L);L is -inf), (integer(U);U is +inf), L < U
)
).
flag_validate_in_interval(([L], U), Type):-
nonvar(Type),
(Type = number ->
number(L), number(U), L < U
;
(Type = float ->
float(L), float(U), L < U
;
Type = integer, integer(L), (integer(U);U is +inf), L < U
)
).
flag_validate_in_interval((L, [U]), Type):-
nonvar(Type),
(Type = number ->
number(L), number(U), L < U
;
(Type = float ->
float(L), float(U), L < U
;
Type = integer, (integer(L);L is -inf), integer(U), L < U
)
).
flag_validate_in_interval(([L], [U]), Type):-
nonvar(Type),
(Type = number ->
number(L), number(U), L =< U
;
(Type = float ->
float(L), float(U), L =< U
;
Type = integer, integer(L), integer(U), L =< U
)
).
flag_validate_in_interval([L, U], Type, Value):-
check_same_type(Type, Value, L, U),
Value >= L,
Value =< U, !.
flag_validate_in_interval((L, U), Type, Value):-
check_same_type(Type, Value, L, U),
Value > L,
Value < U, !.
flag_validate_in_interval(([L], U), Type, Value):-
check_same_type(Type, Value, L, U),
Value >= L,
Value < U, !.
flag_validate_in_interval((L, [U]), Type, Value):-
check_same_type(Type, Value, L, U),
Value > L,
Value =< U, !.
flag_validate_in_interval(([L], [U]), Type, Value):-
check_same_type(Type, Value, L, U),
Value >= L,
Value =< U.
check_same_type(integer, Value, L, U):-
integer(L), integer(U), integer(Value), !.
check_same_type(integer, Value, L, +inf):-
integer(L), integer(Value), !.
check_same_type(integer, Value, -inf, U):-
integer(U), integer(Value), !.
check_same_type(integer, Value, -inf, +inf):-
integer(Value), !.
check_same_type(float, Value, L, U):-
float(L), float(U), float(Value).
check_same_type(number, Value, L, U):-
number(L), number(U), number(Value).
% This is only for messaging purposes. Each validation type should have one.
make_list_msg([H], H).
make_list_msg([H|T], Msg/H):-
make_list_msg(T, Msg).
validation_type_values(flag_validate_dummy, '').
validation_type_values(flag_validate_atom, 'any atom').
validation_type_values(flag_validate_atomic, 'any atomic').
validation_type_values(flag_validate_number, 'any number').
validation_type_values(flag_validate_integer, 'any integer').
validation_type_values(flag_validate_directory, 'any valid directory').
validation_type_values(flag_validate_file, 'any valid file').
validation_type_values(flag_validate_in_list(L), Msg):-
reverse(L, R),
make_list_msg(R, Msg).
validation_type_values(flag_validate_in_interval((L, U), Type), Domain):-
number(L), number(U),
atomic_concat([Type,' in (', L, ',', U, ')'], Domain).
validation_type_values(flag_validate_in_interval(([L], U), Type), Domain):-
number(L), number(U),
atomic_concat([Type,' in [', L, ',', U, ')'], Domain).
validation_type_values(flag_validate_in_interval((L, [U]), Type), Domain):-
number(L), number(U),
atomic_concat([Type,' in (', L, ',', U, ']'], Domain).
validation_type_values(flag_validate_in_interval(([L], [U]), Type), Domain):-
number(L), number(U),
atomic_concat([Type,' in [', L, ',', U, ']'], Domain).
validation_type_values(flag_validate_in_interval([L, U], Type), Domain):-
number(L), number(U),
atomic_concat([Type,' in [', L, ',', U, ']'], Domain).
validation_type_values(ValidationType, Domain):-
flag_validation_syntactic_sugar(ValidationType, SyntacticSugar),
validation_type_values(SyntacticSugar, Domain).
%
% Syntactic sugar validation types
%
flag_validation_syntactic_sugar(SyntacticSugar, Type):-
recorded(flags, validation_syntactic_sugar(SyntacticSugar, Type), _Ref).
flag_add_validation_syntactic_sugar(SyntacticSugar, Type):-
recordzifnot(flags, validation_syntactic_sugar(SyntacticSugar, Type), _Ref).
% End of validation predicates