/**
* rasqal_new_service:
* @world: rasqal_world object
* @service_uri: sparql protocol service URI
* @query_string: query string (or NULL)
* @data_graphs: sequence of #rasqal_data_graph graphs for service
*
* Constructor - create a new rasqal protocol service object.
*
* Create a structure to execute a sparql protocol service at
* @service_uri running the query @query_string and returning
* a sparql result set.
*
* All arguments are copied by the service object
*
* Return value: a new #rasqal_query object or NULL on failure
*/
rasqal_service*
rasqal_new_service(rasqal_world* world, raptor_uri* service_uri,
const char* query_string,
raptor_sequence* data_graphs)
{
rasqal_service* svc;
size_t len = 0;
RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(world, rasqal_world, NULL);
RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(service_uri, raptor_uri, NULL);
svc = (rasqal_service*)RASQAL_CALLOC(rasqal_service, 1, sizeof(*svc));
if(!svc)
return NULL;
svc->world = world;
svc->service_uri = raptor_uri_copy(service_uri);
if(query_string) {
len = strlen(query_string);
svc->query_string = RASQAL_MALLOC(cstring, len + 1);
if(!svc->query_string) {
rasqal_free_service(svc);
return NULL;
}
memcpy(svc->query_string, query_string, len + 1);
}
svc->query_string_len = len;
if(data_graphs) {
int i;
rasqal_data_graph* dg;
#ifdef HAVE_RAPTOR2_API
svc->data_graphs = raptor_new_sequence((raptor_data_free_handler)rasqal_free_data_graph,
NULL);
#else
svc->data_graphs = raptor_new_sequence((raptor_sequence_free_handler*)rasqal_free_data_graph,
NULL);
#endif
if(!svc->data_graphs) {
rasqal_free_service(svc);
return NULL;
}
for(i = 0;
(dg = (rasqal_data_graph*)raptor_sequence_get_at(data_graphs, i));
i++) {
raptor_sequence_push(svc->data_graphs,
rasqal_new_data_graph_from_data_graph(dg));
}
}
return svc;
}
/**
* rasqal_new_service_rowsource:
* @world: world object
* @query: query object
* @service_uri: service URI
* @query_string: query to send to service
* @data_graphs: sequence of data graphs (or NULL)
* @rs_flags: service rowsource flags
*
* INTERNAL - create a new rowsource that takes rows from a service
*
* All arguments are copied.
*
* Return value: new rowsource or NULL on failure
*/
rasqal_rowsource*
rasqal_new_service_rowsource(rasqal_world *world, rasqal_query* query,
raptor_uri* service_uri,
const unsigned char* query_string,
raptor_sequence* data_graphs,
unsigned int rs_flags)
{
rasqal_service_rowsource_context* con = NULL;
rasqal_service* svc = NULL;
int flags = 0;
int silent = (rs_flags & RASQAL_ENGINE_BITFLAG_SILENT);
if(!world || !query_string)
goto fail;
svc = rasqal_new_service(query->world, service_uri, query_string,
data_graphs);
if(!svc) {
if(!silent)
goto fail;
/* Silent errors so tidy up and return empty rowsource */
RASQAL_FREE(cstring, query_string);
if(data_graphs)
raptor_free_sequence(data_graphs);
return rasqal_new_empty_rowsource(world, query);
}
con = RASQAL_CALLOC(rasqal_service_rowsource_context*, 1, sizeof(*con));
if(!con)
goto fail;
con->svc = svc;
con->query = query;
con->flags = rs_flags;
return rasqal_new_rowsource_from_handler(world, query,
con,
&rasqal_service_rowsource_handler,
query->vars_table,
flags);
fail:
if(svc)
rasqal_free_service(svc);
if(con)
RASQAL_FREE(rasqal_service_rowsource_context, con);
if(query_string)
RASQAL_FREE(cstring, query_string);
if(data_graphs)
raptor_free_sequence(data_graphs);
return NULL;
}
static int
rasqal_service_rowsource_finish(rasqal_rowsource* rowsource, void *user_data)
{
rasqal_service_rowsource_context* con;
con = (rasqal_service_rowsource_context*)user_data;
if(con->svc)
rasqal_free_service(con->svc);
if(con->rowsource)
rasqal_free_rowsource(con->rowsource);
RASQAL_FREE(rasqal_service_rowsource_context, con);
return 0;
}
static rasqal_query_results*
roqet_call_sparql_service(rasqal_world* world, raptor_uri* service_uri,
const unsigned char* query_string,
raptor_sequence* data_graphs,
const char* format)
{
rasqal_service* svc;
rasqal_query_results* results;
svc = rasqal_new_service(world, service_uri, query_string,
data_graphs);
if(!svc) {
fprintf(stderr, "%s: Failed to create service object\n", program);
return NULL;
}
rasqal_service_set_format(svc, format);
results = rasqal_service_execute(svc);
rasqal_free_service(svc);
return results;
}