Changeset 2875 for trunk/slv2/src/query.c

Timestamp:

2011-01-30 13:40:26 (2 years ago)

Author:

drobilla

Message:

Remove all use of, and API support for, SPARQL.

File:

• trunk/slv2/src/query.c (modified) (1 diff)

trunk/slv2/src/query.c

@@ -26 +26 @@
 #include "slv2/collections.h"
 #include "slv2/plugin.h"
-#include "slv2/query.h"
 #include "slv2/util.h"
 #include "slv2_internal.h"
-
-
-static const char* slv2_query_prefixes =
-    "PREFIX rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n"
-    "PREFIX rdfs:   <http://www.w3.org/2000/01/rdf-schema#>\n"
-    "PREFIX doap:   <http://usefulinc.com/ns/doap#>\n"
-    "PREFIX foaf:   <http://xmlns.com/foaf/0.1/>\n"
-    "PREFIX lv2:    <http://lv2plug.in/ns/lv2core#>\n"
-    "PREFIX lv2ev:  <http://lv2plug.in/ns/ext/event#>\n";
-
-
-SLV2Values
-slv2_query_get_variable_bindings(SLV2World   world,
-                                 SLV2Results results,
-                                 int         variable)
-{
-    SLV2Values result = NULL;
-
-    if (!librdf_query_results_finished(results->rdf_results))
-        result = slv2_values_new();
-
-    while (!librdf_query_results_finished(results->rdf_results)) {
-        librdf_node* node = librdf_query_results_get_binding_value(results->rdf_results, variable);
-
-        if (node == NULL) {
-            SLV2_ERRORF("Variable %d bound to NULL.\n", variable);
-            librdf_query_results_next(results->rdf_results);
-            continue;
-        }
-
-        SLV2Value val = slv2_value_new_librdf_node(world, node);
-        if (val)
-            raptor_sequence_push(result, val);
-
-        librdf_free_node(node);
-        librdf_query_results_next(results->rdf_results);
-    }
-
-    return result;
-}
-
-
-unsigned
-slv2_results_size(SLV2Results results)
-{
-    size_t count = 0;
-
-    while (!slv2_results_finished(results)) {
-        ++count;
-        slv2_results_next(results);
-    }
-
-    return count;
-}
-
-
-SLV2Results
-slv2_plugin_query_sparql(SLV2Plugin  plugin,
-                         const char* sparql_str)
-{
-    slv2_plugin_load_if_necessary(plugin);
-
-    librdf_uri* base_uri = slv2_value_as_librdf_uri(plugin->plugin_uri);
-
-    char* query_str = slv2_strjoin(slv2_query_prefixes, sparql_str, NULL);
-
-    librdf_query* query = librdf_new_query(plugin->world->world, "sparql", NULL,
-            (const uint8_t*)query_str, base_uri);
-
-    if (!query) {
-        SLV2_ERRORF("Failed to create query:\n%s", query_str);
-        return NULL;
-    }
-
-    librdf_query_results* results = librdf_query_execute(query, plugin->rdf);
-
-    librdf_free_query(query);
-    free(query_str);
-
-    SLV2Results ret = (SLV2Results)malloc(sizeof(struct _SLV2Results));
-    ret->world = plugin->world;
-    ret->rdf_results = results;
-
-    return ret;
-}
-
-
-void
-slv2_results_free(SLV2Results results)
-{
-    librdf_free_query_results(results->rdf_results);
-    free(results);
-}
-
-
-bool
-slv2_results_finished(SLV2Results results)
-{
-    return librdf_query_results_finished(results->rdf_results);
-}
-
-
-SLV2Value
-slv2_results_get_binding_value(SLV2Results results, unsigned index)
-{
-    return slv2_value_new_librdf_node(results->world,
-            librdf_query_results_get_binding_value(
-                    results->rdf_results, index));
-}
-
-
-SLV2Value
-slv2_results_get_binding_value_by_name(SLV2Results results, const char* name)
-{
-    return slv2_value_new_librdf_node(results->world,
-            librdf_query_results_get_binding_value_by_name(
-                    results->rdf_results, name));
-}
-
-
-const char*
-slv2_results_get_binding_name(SLV2Results results, unsigned index)
-{
-    return librdf_query_results_get_binding_name(results->rdf_results, index);
-}
-
-
-void
-slv2_results_next(SLV2Results results)
-{
-    librdf_query_results_next(results->rdf_results);
-}
-
-
-/** Query a single variable */
-SLV2Values
-slv2_plugin_query_variable(SLV2Plugin  plugin,
-                           const char* sparql_str,
-                           unsigned    variable)
-{
-    assert(variable < INT_MAX);
-
-    SLV2Results results = slv2_plugin_query_sparql(plugin, sparql_str);
-
-    SLV2Values ret = slv2_query_get_variable_bindings(plugin->world,
-            results, (int)variable);
-
-    slv2_results_free(results);
-
-    return ret;
-}
-
-
-/** Run a query and count number of matches.
- *
- * More efficient than slv2_plugin_simple_query if you're only interested
- * in the number of results (ie slv2_plugin_num_ports).
- *
- * Note the result of this function is probably meaningless unless the query
- * is a SELECT DISTINCT.
- */
-unsigned
-slv2_plugin_query_count(SLV2Plugin  plugin,
-                        const char* sparql_str)
-{
-    SLV2Results results = slv2_plugin_query_sparql(plugin, sparql_str);
-
-    unsigned ret = 0;
-
-    if (results) {
-        ret = slv2_results_size(results);
-        slv2_results_free(results);
-    }
-
-    return ret;
-}