152 lines
3.8 KiB
Prolog
152 lines
3.8 KiB
Prolog
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/************************************************
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(GC) First Order Variable Elimination Interface
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**************************************************/
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:- module(clpbn_fove,
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[fove/3,
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check_if_fove_done/1,
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init_fove_solver/4,
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run_fove_solver/3,
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finalize_fove_solver/1
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]).
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:- use_module(library('clpbn/display'),
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[clpbn_bind_vals/3]).
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:- use_module(library('clpbn/dists'),
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[get_dist_params/2]).
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:- use_module(library(pfl),
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[factor/6,
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skolem/2
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]).
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:- use_module(horus).
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:- set_horus_flag(use_logarithms, false).
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%:- set_horus_flag(use_logarithms, true).
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fove([[]], _, _) :- !.
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fove([QueryVars], AllVars, Output) :-
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writeln(queryVars:QueryVars),
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writeln(allVars:AllVars),
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init_fove_solver(_, AllVars, _, ParfactorGraph),
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run_fove_solver([QueryVars], LPs, ParfactorGraph),
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finalize_fove_solver(ParfactorGraph),
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clpbn_bind_vals([QueryVars], LPs, Output).
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init_fove_solver(_, AllAttVars, _, fove(ParfactorGraph, DistIds)) :-
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writeln(allattvars:AllAttVars), writeln(''),
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get_parfactors(Parfactors),
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get_dist_ids(Parfactors, DistIds0),
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sort(DistIds0, DistIds),
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get_observed_vars(AllAttVars, ObservedVars),
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writeln(factors:Parfactors:'\n'),
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writeln(evidence:ObservedVars:'\n'),
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create_lifted_network(Parfactors,ObservedVars,ParfactorGraph).
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:- table get_parfactors/1.
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%
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% enumerate all parfactors and enumerate their domain as tuples.
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%
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% output is list of pf(
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% Id: an unique number
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% Ks: a list of keys, also known as the pf formula [a(X),b(Y),c(X,Y)]
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% Vs: the list of free variables [X,Y]
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% Phi: the table following usual CLP(BN) convention
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% Tuples: tuples with all ground bindings for variables in Vs, of the form [fv(x,y)]
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%
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get_parfactors(Factors) :-
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findall(F, is_factor(F), Factors).
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is_factor(pf(Id, Ks, Rs, Phi, Tuples)) :-
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factor(_Type, Id, Ks, Vs, Table, Constraints),
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get_ranges(Ks,Rs),
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Table \= avg,
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gen_table(Table, Phi),
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all_tuples(Constraints, Vs, Tuples).
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get_ranges([],[]).
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get_ranges(K.Ks, Range.Rs) :- !,
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skolem(K,Domain),
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length(Domain,Range),
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get_ranges(Ks, Rs).
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gen_table(Table, Phi) :-
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( is_list(Table)
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->
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Phi = Table
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;
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call(user:Table, Phi)
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).
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all_tuples(Constraints, Tuple, Tuples) :-
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setof(Tuple, Constraints^run(Constraints), Tuples).
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run([]).
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run(Goal.Constraints) :-
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user:Goal,
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run(Constraints).
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get_dist_ids([], []).
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get_dist_ids(pf(Id, _, _, _, _).Parfactors, Id.DistIds) :-
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get_dist_ids(Parfactors, DistIds).
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get_observed_vars([], []).
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get_observed_vars(V.AllAttVars, [K:E|ObservedVars]) :-
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writeln('checking ev for':V),
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clpbn:get_atts(V,[key(K)]),
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( clpbn:get_atts(V,[evidence(E)]) ; pfl:evidence(K,E) ), !,
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writeln('evidence!!!':K:E),
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get_observed_vars(AllAttVars, ObservedVars).
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get_observed_vars(V.AllAttVars, ObservedVars) :-
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clpbn:get_atts(V,[key(K)]), !,
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writeln('no evidence for':V:K),
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get_observed_vars(AllAttVars, ObservedVars).
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get_query_vars([], []).
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get_query_vars(E1.L1, E2.L2) :-
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get_query_vars_2(E1,E2),
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get_query_vars(L1, L2).
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get_query_vars_2([], []).
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get_query_vars_2(V.AttVars, [RV|RVs]) :-
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clpbn:get_atts(V,[key(RV)]), !,
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get_query_vars_2(AttVars, RVs).
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get_dists_parameters([], []).
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get_dists_parameters([Id|Ids], [dist(Id, Params)|DistsInfo]) :-
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get_pfl_parameters(Id, Params),
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get_dists_parameters(Ids, DistsInfo).
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run_fove_solver(QueryVarsAtts, Solutions, fove(ParfactorGraph, DistIds)) :-
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% TODO set_parfactor_graph_params
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writeln(distIds:DistIds),
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%get_dists_parameters(DistIds, DistParams),
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%writeln(distParams:DistParams),
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get_query_vars(QueryVarsAtts, QueryVars),
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writeln(queryVars:QueryVars),
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run_lifted_solver(ParfactorGraph, QueryVars, Solutions).
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finalize_fove_solver(fove(ParfactorGraph, _)) :-
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free_parfactor_graph(ParfactorGraph).
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