/**
* rasqal_query_results_write:
* @iostr: #raptor_iostream to write the query to
* @results: #rasqal_query_results query results format
* @name: format name (or NULL)
* @mime_type: format mime type (or NULL)
* @format_uri: #raptor_uri describing the format to write (or NULL for default)
* @base_uri: #raptor_uri base URI of the output format
*
* Write the query results to an iostream in a format.
*
* This uses the #rasqal_query_results_formatter class and the
* rasqal_query_results_formatter_write() method to perform the
* formatting.
*
* Note that after calling this method, the query results will be
* empty and rasqal_query_results_finished() will return true (non-0)
*
* See rasqal_world_get_query_results_format_description() for obtaining the
* supported format names, mime_types and URIs at run time.
*
* Return value: non-0 on failure
**/
int
rasqal_query_results_write(raptor_iostream *iostr,
rasqal_query_results* results,
const char *name,
const char *mime_type,
raptor_uri *format_uri,
raptor_uri *base_uri)
{
rasqal_query_results_formatter *formatter;
int status;
RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(iostr, raptor_iostream, 1);
RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(results, rasqal_query_results, 1);
if(results->failed)
return 1;
formatter = rasqal_new_query_results_formatter(results->world,
name, mime_type,
format_uri);
if(!formatter)
return 1;
status = rasqal_query_results_formatter_write(iostr, formatter,
results, base_uri);
rasqal_free_query_results_formatter(formatter);
return status;
}
static int
librdf_query_rasqal_results_formatter_write(raptor_iostream *iostr,
librdf_query_results_formatter* qrf,
librdf_query_results* query_results,
librdf_uri *base_uri)
{
librdf_query *query=query_results->query;
librdf_query_rasqal_context *context=(librdf_query_rasqal_context*)query->context;
return rasqal_query_results_formatter_write(iostr, qrf->formatter,
context->results,
(raptor_uri*)base_uri);
}
static int
print_formatted_query_results(rasqal_world* world,
rasqal_query_results* results,
raptor_world* raptor_world_ptr,
FILE* output,
const char* result_format,
raptor_uri* base_uri,
int quiet)
{
raptor_iostream *iostr;
rasqal_query_results_formatter* results_formatter;
int rc = 0;
results_formatter = rasqal_new_query_results_formatter(world,
result_format,
NULL, NULL);
if(!results_formatter) {
fprintf(stderr, "%s: Invalid bindings result format `%s'\n",
program, result_format);
rc = 1;
goto tidy;
}
iostr = raptor_new_iostream_to_file_handle(raptor_world_ptr, output);
if(!iostr) {
rasqal_free_query_results_formatter(results_formatter);
rc = 1;
goto tidy;
}
rc = rasqal_query_results_formatter_write(iostr, results_formatter,
results, base_uri);
raptor_free_iostream(iostr);
rasqal_free_query_results_formatter(results_formatter);
tidy:
if(rc)
fprintf(stderr, "%s: Formatting query results failed\n", program);
return rc;
}
