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/* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@vu.nl
WWW: http://www.swi-prolog.org
Copyright (c) 2016, VU University Amsterdam
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
:- module(rdf_sandbox, []).
/** <module> Declare RDF API sandbox-safe
This module provides clauses for the multifile predicate
sandbox:safe_primitive/1 defined in library(sandbox) that make all
predicates of the RDF API that have no permanent side effects safe. To
have an affect, this module must be *loaded after the modules it
declares safe*. Thus, when using the sequence below, `rdf11` is safe,
while `sparql_client` is not (unless sparql_client was already loaded
before this sequence).
```
:- use_module(library(semweb/rdf11)). % safe
:- use_module(library(semweb/rdf_sandbox)).
:- use_module(library(semweb/sparql_client)). % Not safe
```
Normally, sandbox declarations live in the module in which the safe
predicates are defined, so we are sure we are making declarations about
this specific version of a predicate. For RDF we decoupled the sandbox
declarations from the implementation because although rdf/3 is
technically safe to use (calling it has no side effects), it may _make
information accessible_ that is not supposed to be.
Loading this library makes all side-effect-free predicates considered
safe. If some of your RDF needs to remain hidden, you should *not* load
this file and instead use your own version that project your data. The
example below defines a wrapper around rdf/4 that provides safe access
to certain graphs.
``` :- module(rdf_api,
[ rdf/4
]).
:- use_module(library(semweb/rdf11)).
:- rdf_meta rdf(r,r,o,r).
rdf(S,P,O,G) :-
public_graph(G), !,
rdf11:rdf(S,P,O,G).
rdf(S,P,O,G) :-
permission_error(access, graph, G).
:- multifile sandbox:safe_primitive/1.
sandbox:safe_primitive(rdf_api:rdf(_,_,_,_)).
*/
:- multifile
sandbox:safe_primitive/1,
sandbox:safe_meta_predicate/1.
/*******************************
* RDF_DB *
*******************************/
:- if(current_predicate(rdf_db:rdf/3)).
sandbox:safe_primitive(rdf_db:rdf(_,_,_)).
sandbox:safe_primitive(rdf_db:rdf(_,_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_has(_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_has(_,_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_reachable(_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_reachable(_,_,_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_resource(_)).
sandbox:safe_primitive(rdf_db:rdf_subject(_)).
sandbox:safe_primitive(rdf_db:rdf_predicate_property(_,_)).
sandbox:safe_primitive(rdf_db:rdf_current_predicate(_)).
sandbox:safe_primitive(rdf_db:rdf_current_literal(_)).
sandbox:safe_primitive(rdf_db:rdf_graph(_)).
sandbox:safe_primitive(rdf_db:rdf_generation(_)).
sandbox:safe_primitive(rdf_db:rdf_estimate_complexity(_,_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_statistics(_)).
sandbox:safe_primitive(rdf_db:lang_matches(_,_)).
sandbox:safe_primitive(rdf_db:lang_equal(_,_)).
sandbox:safe_primitive(rdf_db:rdf_version(_)).
sandbox:safe_primitive(rdf_db:rdf_md5(_,_)).
sandbox:safe_primitive(rdf_db:rdf_graph_modified_(_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_graph_source_(_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_graph_(_,_)).
sandbox:safe_primitive(rdf_db:rdf_find_literal_map(_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_keys_in_literal_map(_,_,_)).
sandbox:safe_primitive(rdf_db:rdf_statistics_literal_map(_,_)).
sandbox:safe_meta_predicate(rdf_prefixes:rdf_current_prefix/2).
sandbox:safe_meta_predicate(rdf_prefixes:rdf_global_id/2).
:- endif.
/*******************************
* RDF11 *
*******************************/
:- if(current_predicate(rdf11:in_xml_literal/3)).
sandbox:safe_primitive(rdf11:in_xml_literal(_,_,_)).
sandbox:safe_primitive(rdf11:pre_object(_,_,_,_)).
sandbox:safe_primitive(rdf11:post_object(_,_)).
sandbox:safe_primitive(rdf11:rdf_where(_)).
:- endif.
/*******************************
* RDF-LITINDEX *
*******************************/
:- if(current_predicate(rdf_litindex:rdf_find_literals/2)).
sandbox:safe_primitive(rdf_litindex:rdf_find_literals(_,_)).
sandbox:safe_primitive(rdf_litindex:rdf_tokenize_literal(_,_)).
sandbox:safe_primitive(rdf_litindex:rdf_literal_index(_,_)).
:- endif.
/*******************************
* SPARQL-CLIENT *
*******************************/
:- if(current_predicate(sparql_client:sparql_query/3)).
sandbox:safe_primitive(sparql_client:sparql_query(_,_,_)).
:- endif.
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