static void print_nodes(FILE* fh, librdf_iterator* iterator) { int count; librdf_node* context_node; librdf_node* node; /* (Common code) Print out nodes */ count=0; while(!librdf_iterator_end(iterator)) { context_node=(librdf_node*)librdf_iterator_get_context(iterator); node=(librdf_node*)librdf_iterator_get_object(iterator); if(!node) { fprintf(stderr, ": librdf_iterator_get_object returned NULL\n"); break; } fputs("Matched node: ", fh); librdf_node_print(node, fh); if(context_node) { fputs(" with context ", fh); librdf_node_print(context_node, fh); } fputc('\n', fh); count++; librdf_iterator_next(iterator); } librdf_free_iterator(iterator); fprintf(stderr, ": matching nodes: %d\n", count); }
/** * librdf_stream_print: * @stream: the stream object * @fh: the FILE stream to print to * * Print the stream. * * This prints the remaining statements of the stream to the given * file handle. Note that after this method is called the stream * will be empty so that librdf_stream_end() will always be true * and librdf_stream_next() will always return NULL. The only * useful operation is to dispose of the stream with the * librdf_free_stream() destructor. * * This method is for debugging and the format of the output should * not be relied on. * * @Deprecated: Use librdf_stream_write() to write to * #raptor_iostream which can be made to write to a string. Use a * #librdf_serializer to write proper syntax formats. * **/ void librdf_stream_print(librdf_stream *stream, FILE *fh) { raptor_iostream *iostr; if(!stream) return; iostr = raptor_new_iostream_to_file_handle(stream->world->raptor_world_ptr, fh); if(!iostr) return; while(!librdf_stream_end(stream)) { librdf_statement* statement = librdf_stream_get_object(stream); librdf_node* context_node = librdf_stream_get_context2(stream); if(!statement) break; fputs(" ", fh); librdf_statement_write(statement, iostr); if(context_node) { fputs(" with context ", fh); librdf_node_print(context_node, fh); } fputs("\n", fh); librdf_stream_next(stream); } raptor_free_iostream(iostr); }
static void print_node(FILE* fh, librdf_node* node) { if(node) { fputs("Matched node: ", fh); librdf_node_print(node, fh); fputc('\n', fh); } }
int main(int argc, char *argv[]) { librdf_world *world; librdf_uri* prefix_uri; librdf_node* nodes[ITERATOR_NODES_COUNT]; int i; librdf_iterator* iterator; int count; char *program=argv[0]; world=librdf_new_world(); librdf_world_init_mutex(world); librdf_init_hash(world); librdf_init_uri(world); librdf_init_node(world); prefix_uri=librdf_new_uri(world, (const unsigned char*)NODE_URI_PREFIX); if(!prefix_uri) { fprintf(stderr, "%s: Failed to create prefix URI\n", program); return(1); } for(i=0; i < ITERATOR_NODES_COUNT; i++) { unsigned char buf[2]; buf[0]='a'+i; buf[1]='\0'; nodes[i]=librdf_new_node_from_uri_local_name(world, prefix_uri, buf); if(!nodes[i]) { fprintf(stderr, "%s: Failed to create node %i (%s)\n", program, i, buf); return(1); } } fprintf(stdout, "%s: Creating static node iterator\n", program); iterator=librdf_node_static_iterator_create(nodes, ITERATOR_NODES_COUNT); if(!iterator) { fprintf(stderr, "%s: Failed to createstatic node iterator\n", program); return(1); } fprintf(stdout, "%s: Listing static node iterator\n", program); count=0; while(!librdf_iterator_end(iterator)) { librdf_node* i_node=(librdf_node*)librdf_iterator_get_object(iterator); if(!i_node) { fprintf(stderr, "%s: librdf_iterator_current return NULL when not end o fiterator\n", program); return(1); } fprintf(stdout, "%s: node %d is: ", program, count); librdf_node_print(i_node, stdout); fputc('\n', stdout); if(!librdf_node_equals(i_node, nodes[count])) { fprintf(stderr, "%s: static node iterator node %i returned unexpected node\n", program, count); librdf_node_print(i_node, stderr); fputs(" rather than ", stdout); librdf_node_print(nodes[count], stderr); fputc('\n', stdout); return(1); } librdf_iterator_next(iterator); count++; } librdf_free_iterator(iterator); if(count != ITERATOR_NODES_COUNT) { fprintf(stderr, "%s: Iterator returned %d nodes, expected %d\n", program, count, ITERATOR_NODES_COUNT); return(1); } fprintf(stdout, "%s: Static node iterator worked ok\n", program); fprintf(stdout, "%s: Freeing nodes\n", program); for (i=0; i<ITERATOR_NODES_COUNT; i++) { librdf_free_node(nodes[i]); } librdf_free_uri(prefix_uri); librdf_finish_node(world); librdf_finish_uri(world); librdf_finish_hash(world); LIBRDF_FREE(librdf_world, world); /* keep gcc -Wall happy */ return(0); }
static int rasqal_redland_init_triples_match(rasqal_triples_match* rtm, rasqal_triples_source *rts, void *user_data, rasqal_triple_meta *m, rasqal_triple *t) { rasqal_redland_triples_source_user_data* rtsc=(rasqal_redland_triples_source_user_data*)user_data; rasqal_redland_triples_match_context* rtmc; rasqal_variable* var; rtm->bind_match=rasqal_redland_bind_match; rtm->next_match=rasqal_redland_next_match; rtm->is_end=rasqal_redland_is_end; rtm->finish=rasqal_redland_finish_triples_match; rtmc = LIBRDF_CALLOC(rasqal_redland_triples_match_context*, 1, sizeof(*rtmc)); if(!rtmc) return 1; rtm->user_data=rtmc; /* at least one of the triple terms is a variable and we need to * do a triplesMatching() aka librdf_model_find_statements * * redland find_statements will do the right thing and internally * pick the most efficient, indexed way to get the answer. */ if((var=rasqal_literal_as_variable(t->subject))) { if(var->value) rtmc->nodes[0]=rasqal_literal_to_redland_node(rtsc->world, var->value); else rtmc->nodes[0]=NULL; } else rtmc->nodes[0]=rasqal_literal_to_redland_node(rtsc->world, t->subject); m->bindings[0]=var; if((var=rasqal_literal_as_variable(t->predicate))) { if(var->value) rtmc->nodes[1]=rasqal_literal_to_redland_node(rtsc->world, var->value); else rtmc->nodes[1]=NULL; } else rtmc->nodes[1]=rasqal_literal_to_redland_node(rtsc->world, t->predicate); m->bindings[1]=var; if((var=rasqal_literal_as_variable(t->object))) { if(var->value) rtmc->nodes[2]=rasqal_literal_to_redland_node(rtsc->world, var->value); else rtmc->nodes[2]=NULL; } else rtmc->nodes[2]=rasqal_literal_to_redland_node(rtsc->world, t->object); m->bindings[2]=var; if(t->origin) { if((var=rasqal_literal_as_variable(t->origin))) { if(var->value) rtmc->origin=rasqal_literal_to_redland_node(rtsc->world, var->value); } else rtmc->origin=rasqal_literal_to_redland_node(rtsc->world, t->origin); m->bindings[3]=var; } rtmc->qstatement=librdf_new_statement_from_nodes(rtsc->world, rtmc->nodes[0], rtmc->nodes[1], rtmc->nodes[2]); if(!rtmc->qstatement) return 1; #if defined(LIBRDF_DEBUG) && LIBRDF_DEBUG > 1 LIBRDF_DEBUG1("query statement: "); librdf_statement_print(rtmc->qstatement, stderr); if(rtmc->origin) { fput(" with context node: ", stderr); librdf_node_print(rtmc->origin, stderr); } fputc('\n', stderr); #endif if(rtmc->origin) rtmc->stream=librdf_model_find_statements_in_context(rtsc->model, rtmc->qstatement, rtmc->origin); else rtmc->stream=librdf_model_find_statements(rtsc->model, rtmc->qstatement); if(!rtmc->stream) return 1; #if defined(LIBRDF_DEBUG) && LIBRDF_DEBUG > 1 LIBRDF_DEBUG1("rasqal_init_triples_match done\n"); #endif return 0; }
int main(int argc, char *argv[]) { librdf_world* world; librdf_parser* parser; librdf_serializer* serializer; librdf_storage *storage; librdf_model* model; librdf_node *source, *arc, *target, *node; librdf_node *subject, *predicate, *object; librdf_node* context_node=NULL; librdf_stream* stream; librdf_iterator* iterator; librdf_uri *uri; librdf_uri *base_uri=NULL; librdf_query *query; librdf_query_results *results; librdf_hash *options; int count; int rc; int transactions=0; const char* storage_name; const char* storage_options; const char* context; const char* identifier; const char* results_format; librdf_statement* statement=NULL; char* query_cmd=NULL; char* s; /* * Initialize */ storage_name="virtuoso"; results_format="xml"; context=DEFAULT_CONTEXT; identifier=DEFAULT_IDENTIFIER; /* * Get connection options */ if(argc == 2 && argv[1][0] != '\0') storage_options=argv[1]; else if((s=getenv ("VIRTUOSO_STORAGE_OPTIONS")) != NULL) storage_options=s; else storage_options=DEFAULT_STORAGE_OPTIONS; world=librdf_new_world(); librdf_world_set_logger(world, world, log_handler); librdf_world_open(world); options=librdf_new_hash(world, NULL); librdf_hash_open(options, NULL, 0, 1, 1, NULL); librdf_hash_put_strings(options, "contexts", "yes"); transactions=1; librdf_hash_from_string(options, storage_options); storage=librdf_new_storage_with_options(world, storage_name, identifier, options); if(!storage) { fprintf(stderr, ": Failed to open %s storage '%s'\n", storage_name, identifier); return(1); } model=librdf_new_model(world, storage, NULL); if(!model) { fprintf(stderr, ": Failed to create model\n"); return(1); } if(transactions) librdf_model_transaction_start(model); /* Do this or gcc moans */ stream=NULL; iterator=NULL; parser=NULL; serializer=NULL; source=NULL; arc=NULL; target=NULL; subject=NULL; predicate=NULL; object=NULL; uri=NULL; node=NULL; query=NULL; results=NULL; context_node=librdf_new_node_from_uri_string(world, (const unsigned char *)context); /**** Test 1 *******/ startTest(1, " Remove all triples in <%s> context\n", context); { rc=librdf_model_context_remove_statements(model, context_node); if(rc) endTest(0, " failed to remove context triples from the graph\n"); else endTest(1, " removed context triples from the graph\n"); } /**** Test 2 *******/ startTest(2, " Add triples to <%s> context\n", context); { rc=0; rc |= add_triple(world, context_node, model, "aa", "bb", "cc"); rc |= add_triple(world, context_node, model, "aa", "bb1", "cc"); rc |= add_triple(world, context_node, model, "aa", "a2", "_:cc"); rc |= add_triple_typed(world, context_node, model, "aa", "a2", "cc"); rc |= add_triple_typed(world, context_node, model, "mm", "nn", "Some long literal with language@en"); rc |= add_triple_typed(world, context_node, model, "oo", "pp", "12345^^<http://www.w3.org/2001/XMLSchema#int>"); if(rc) endTest(0, " failed add triple\n"); else endTest(1, " add triple to context\n"); } /**** Test 3 *******/ startTest(3, " Print all triples in <%s> context\n", context); { raptor_iostream* iostr = raptor_new_iostream_to_file_handle(librdf_world_get_raptor(world), stdout); librdf_model_write(model, iostr); raptor_free_iostream(iostr); endTest(1, "\n"); } /***** Test 4 *****/ startTest(4, " Count of triples in <%s> context\n", context); { count=librdf_model_size(model); if(count >= 0) endTest(1, " graph has %d triples\n", count); else endTest(0, " graph has unknown number of triples\n"); } /***** Test 5 *****/ startTest(5, " Exec: ARC aa bb \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb"); node=librdf_model_get_target(model, subject, predicate); librdf_free_node(subject); librdf_free_node(predicate); if(!node) { endTest(0, " Failed to get arc\n"); } else { print_node(stdout, node); librdf_free_node(node); endTest(1, "\n"); } } /***** Test 6 *****/ startTest(6, " Exec: ARCS aa cc \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); object=librdf_new_node_from_uri_string(world, (const unsigned char*)"cc"); iterator=librdf_model_get_arcs(model, subject, object); librdf_free_node(subject); librdf_free_node(object); if(!iterator) { endTest(0, " Failed to get arcs\n"); } else { print_nodes(stdout, iterator); endTest(1, "\n"); } } /***** Test 7 *****/ startTest(7, " Exec: ARCS-IN cc \n"); { object=librdf_new_node_from_uri_string(world, (const unsigned char*)"cc"); iterator=librdf_model_get_arcs_in(model, object); librdf_free_node(object); if(!iterator) { endTest(0, " Failed to get arcs in\n"); } else { int ok=1; count=0; while(!librdf_iterator_end(iterator)) { context_node=(librdf_node*)librdf_iterator_get_context(iterator); node=(librdf_node*)librdf_iterator_get_object(iterator); /*returns SHARED pointer */ if(!node) { ok=0; endTest(ok, " librdf_iterator_get_next returned NULL\n"); break; } fputs("Matched arc: ", stdout); librdf_node_print(node, stdout); if(context_node) { fputs(" with context ", stdout); librdf_node_print(context_node, stdout); } fputc('\n', stdout); count++; librdf_iterator_next(iterator); } librdf_free_iterator(iterator); endTest(ok, " matching arcs: %d\n", count); } } /***** Test 8 *****/ startTest(8, " Exec: ARCS-OUT aa \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); iterator=librdf_model_get_arcs_out(model, subject); librdf_free_node(subject); if(!iterator) endTest(0, " Failed to get arcs out\n"); else { int ok=1; count=0; while(!librdf_iterator_end(iterator)) { context_node=(librdf_node*)librdf_iterator_get_context(iterator); node=(librdf_node*)librdf_iterator_get_object(iterator); if(!node) { ok=0; endTest(ok, " librdf_iterator_get_next returned NULL\n"); break; } fputs("Matched arc: ", stdout); librdf_node_print(node, stdout); if(context_node) { fputs(" with context ", stdout); librdf_node_print(context_node, stdout); } fputc('\n', stdout); count++; librdf_iterator_next(iterator); } librdf_free_iterator(iterator); endTest(ok, " matching arcs: %d\n", count); } } /***** Test 9 *****/ startTest(9, " Exec: CONTAINS aa bb1 cc \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb1"); object=librdf_new_node_from_uri_string(world, (const unsigned char*)"cc"); statement=librdf_new_statement(world); librdf_statement_set_subject(statement, subject); librdf_statement_set_predicate(statement, predicate); librdf_statement_set_object(statement, object); if(librdf_model_contains_statement(model, statement)) endTest(1, " the graph contains the triple\n"); else endTest(0, " the graph does not contain the triple\n"); librdf_free_statement(statement); } /***** Test 10 *****/ startTest(10, " Exec: FIND aa - - \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); statement=librdf_new_statement(world); librdf_statement_set_subject(statement, subject); stream=librdf_model_find_statements_in_context(model, statement, context_node); if(!stream) { endTest(0, " FIND returned no results (NULL stream)\n"); } else { librdf_node* ctxt_node=NULL; int ok=1; count=0; while(!librdf_stream_end(stream)) { librdf_statement *stmt=librdf_stream_get_object(stream); ctxt_node=(librdf_node*)librdf_stream_get_context(stream); if(!stmt) { ok=0; endTest(ok, " librdf_stream_next returned NULL\n"); break; } fputs("Matched triple: ", stdout); librdf_statement_print(stmt, stdout); if(context) { fputs(" with context ", stdout); librdf_node_print(ctxt_node, stdout); } fputc('\n', stdout); count++; librdf_stream_next(stream); } librdf_free_stream(stream); endTest(ok, " matching triples: %d\n", count); } librdf_free_statement(statement); } /***** Test 11 *****/ startTest(11, " Exec: HAS-ARC-IN cc bb \n"); { predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb"); object=librdf_new_node_from_uri_string(world, (const unsigned char*)"cc"); if(librdf_model_has_arc_in(model, object, predicate)) endTest(1, " the graph contains the arc\n"); else endTest(0, " the graph does not contain the arc\n"); librdf_free_node(predicate); librdf_free_node(object); } /***** Test 12 *****/ startTest(12, " Exec: HAS-ARC-OUT aa bb \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb"); if(librdf_model_has_arc_out(model, subject, predicate)) endTest(1, " the graph contains the arc\n"); else endTest(0, " the graph does not contain the arc\n"); librdf_free_node(predicate); librdf_free_node(subject); } /***** Test 13 *****/ startTest(13, " Exec: SOURCE aa cc \n"); { predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb"); object=librdf_new_node_from_uri_string(world, (const unsigned char*)"cc"); node=librdf_model_get_source(model, predicate, object); librdf_free_node(predicate); librdf_free_node(object); if(!node) { endTest(0, " Failed to get source\n"); } else { print_node(stdout, node); librdf_free_node(node); endTest(1, "\n"); } } /***** Test 14 *****/ startTest(14, " Exec: SOURCES bb cc \n"); { predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb"); object=librdf_new_node_from_uri_string(world, (const unsigned char*)"cc"); iterator=librdf_model_get_sources(model, predicate, object); librdf_free_node(predicate); librdf_free_node(object); if(!iterator) { endTest(0, " Failed to get sources\n"); } else { print_nodes(stdout, iterator); endTest(1, "\n"); } } /***** Test 15 *****/ startTest(15, " Exec: TARGET aa bb \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb"); node=librdf_model_get_target(model, subject, predicate); librdf_free_node(subject); librdf_free_node(predicate); if(!node) { endTest(0, " Failed to get target\n"); } else { print_node(stdout, node); librdf_free_node(node); endTest(1, "\n"); } } /***** Test 16 *****/ startTest(16, " Exec: TARGETS aa bb \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb"); iterator=librdf_model_get_targets(model, subject, predicate); librdf_free_node(subject); librdf_free_node(predicate); if(!iterator) { endTest(0, " Failed to get targets\n"); } else { print_nodes(stdout, iterator); endTest(1, "\n"); } } /***** Test 17 *****/ startTest(17, " Exec: REMOVE aa bb1 cc \n"); { subject=librdf_new_node_from_uri_string(world, (const unsigned char*)"aa"); predicate=librdf_new_node_from_uri_string(world, (const unsigned char*)"bb1"); object=librdf_new_node_from_uri_string(world, (const unsigned char*)"cc"); statement=librdf_new_statement(world); librdf_statement_set_subject(statement, subject); librdf_statement_set_predicate(statement, predicate); librdf_statement_set_object(statement, object); if(librdf_model_context_remove_statement(model, context_node, statement)) endTest(0, " failed to remove triple from the graph\n"); else endTest(1, " removed triple from the graph\n"); librdf_free_statement(statement); } /***** Test 18 *****/ query_cmd=(char *)"CONSTRUCT {?s ?p ?o} FROM <http://red> WHERE {?s ?p ?o}"; startTest(18, " Exec: QUERY \"%s\" \n", query_cmd); { query=librdf_new_query(world, (char *)"vsparql", NULL, (const unsigned char *)query_cmd, NULL); if(!(results=librdf_model_query_execute(model, query))) { endTest(0, " Query of model with '%s' failed\n", query_cmd); librdf_free_query(query); query=NULL; } else { stream=librdf_query_results_as_stream(results); if(!stream) { endTest(0, " QUERY returned no results (NULL stream)\n"); } else { librdf_node* ctxt=NULL; count=0; while(!librdf_stream_end(stream)) { librdf_statement *stmt=librdf_stream_get_object(stream); /*returns SHARED pointer */ ctxt=(librdf_node*)librdf_stream_get_context(stream); if(!stmt) { endTest(0, " librdf_stream_next returned NULL\n"); break; } fputs("Matched triple: ", stdout); librdf_statement_print(stmt, stdout); if(ctxt) { fputs(" with context ", stdout); librdf_node_print(ctxt, stdout); } fputc('\n', stdout); count++; librdf_stream_next(stream); } librdf_free_stream(stream); endTest(1, " matching triples: %d\n", count); librdf_free_query_results(results); } } librdf_free_query(query); } /***** Test 19 *****/ query_cmd=(char *)"SELECT * WHERE {graph <http://red> { ?s ?p ?o }}"; startTest(19, " Exec1: QUERY_AS_BINDINGS \"%s\" \n", query_cmd); { query=librdf_new_query(world, (char *)"vsparql", NULL, (const unsigned char *)query_cmd, NULL); if(!(results=librdf_model_query_execute(model, query))) { endTest(0, " Query of model with '%s' failed\n", query_cmd); librdf_free_query(query); query=NULL; } else { raptor_iostream *iostr; librdf_query_results_formatter *formatter; fprintf(stderr, "**: Formatting query result as '%s':\n", results_format); iostr = raptor_new_iostream_to_file_handle(librdf_world_get_raptor(world), stdout); formatter = librdf_new_query_results_formatter2(results, results_format, NULL /* mime type */, NULL /* format_uri */); base_uri = librdf_new_uri(world, (const unsigned char*)"http://example.org/"); librdf_query_results_formatter_write(iostr, formatter, results, base_uri); librdf_free_query_results_formatter(formatter); raptor_free_iostream(iostr); librdf_free_uri(base_uri); endTest(1, "\n"); librdf_free_query_results(results); } librdf_free_query(query); } /***** Test 20 *****/ query_cmd=(char *)"SELECT * WHERE {graph <http://red> { ?s ?p ?o }}"; startTest(20, " Exec2: QUERY_AS_BINDINGS \"%s\" \n", query_cmd); { query=librdf_new_query(world, (char *)"vsparql", NULL, (const unsigned char *)query_cmd, NULL); if(!(results=librdf_model_query_execute(model, query))) { endTest(0, " Query of model with '%s' failed\n", query_cmd); librdf_free_query(query); query=NULL; } else { if(print_query_results(world, model, results)) endTest(0, "\n"); else endTest(1, "\n"); librdf_free_query_results(results); } librdf_free_query(query); } getTotal(); if(transactions) librdf_model_transaction_commit(model); librdf_free_node(context_node); librdf_free_node(context_node); librdf_free_hash(options); librdf_free_model(model); librdf_free_storage(storage); librdf_free_world(world); #ifdef LIBRDF_MEMORY_DEBUG librdf_memory_report(stderr); #endif /* keep gcc -Wall happy */ return(0); }
int print_query_results(librdf_world* world, librdf_model* model, librdf_query_results *results) { int i; char *name; librdf_stream* stream; librdf_serializer* serializer; const char *query_graph_serializer_syntax_name="rdfxml"; if(librdf_query_results_is_bindings(results)) { fprintf(stdout, ": Query returned bindings results:\n"); while(!librdf_query_results_finished(results)) { fputs("result: [", stdout); for(i=0; i<librdf_query_results_get_bindings_count(results); i++) { librdf_node *value=librdf_query_results_get_binding_value(results, i); name=(char*)librdf_query_results_get_binding_name(results, i); if(i>0) fputs(", ", stdout); fprintf(stdout, "%s=", name); if(value) { librdf_node_print(value, stdout); librdf_free_node(value); } else fputs("NULL", stdout); } fputs("]\n", stdout); librdf_query_results_next(results); } fprintf(stdout, ": Query returned %d results\n", librdf_query_results_get_count(results)); } else if(librdf_query_results_is_boolean(results)) { fprintf(stdout, ": Query returned boolean result: %s\n", librdf_query_results_get_boolean(results) ? "true" : "false"); } else if(librdf_query_results_is_graph(results)) { librdf_storage* tmp_storage; librdf_model* tmp_model; tmp_storage=librdf_new_storage(world, NULL, NULL, NULL); tmp_model=librdf_new_model(world, tmp_storage, NULL); fprintf(stdout, ": Query returned graph result:\n"); stream=librdf_query_results_as_stream(results); if(!stream) { fprintf(stderr, ": Failed to get query results graph\n"); return -1; } librdf_model_add_statements(tmp_model, stream); librdf_free_stream(stream); fprintf(stdout, ": Total %d triples\n", librdf_model_size(model)); serializer=librdf_new_serializer(world, query_graph_serializer_syntax_name, NULL, NULL); if(!serializer) { fprintf(stderr, ": Failed to create serializer type %s\n", query_graph_serializer_syntax_name); return -1; } librdf_serializer_serialize_model_to_file_handle(serializer, stdout, NULL, tmp_model); librdf_free_serializer(serializer); librdf_free_model(tmp_model); librdf_free_storage(tmp_storage); } else { fprintf(stdout, ": Query returned unknown result format\n"); return -1; } return 0; }