diff options
Diffstat (limited to 'src/libtracker-data/tracker-sparql-types.c')
| -rw-r--r-- | src/libtracker-data/tracker-sparql-types.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/libtracker-data/tracker-sparql-types.c b/src/libtracker-data/tracker-sparql-types.c index 1c6125f0f..c3c8eae3c 100644 --- a/src/libtracker-data/tracker-sparql-types.c +++ b/src/libtracker-data/tracker-sparql-types.c @@ -27,6 +27,7 @@ enum { TOKEN_TYPE_LITERAL, TOKEN_TYPE_VARIABLE, TOKEN_TYPE_PARAMETER, + TOKEN_TYPE_PATH, }; /* Helper structs */ @@ -198,6 +199,14 @@ tracker_token_parameter_init (TrackerToken *token, } void +tracker_token_path_init (TrackerToken *token, + TrackerPathElement *path) +{ + token->type = TOKEN_TYPE_PATH; + token->content.path = path; +} + +void tracker_token_unset (TrackerToken *token) { if (token->type == TOKEN_TYPE_LITERAL) @@ -237,6 +246,14 @@ tracker_token_get_parameter (TrackerToken *token) return NULL; } +TrackerPathElement * +tracker_token_get_path (TrackerToken *token) +{ + if (token->type == TOKEN_TYPE_PATH) + return token->content.path; + return NULL; +} + const gchar * tracker_token_get_idstring (TrackerToken *token) { @@ -244,6 +261,8 @@ tracker_token_get_idstring (TrackerToken *token) return token->content.literal; else if (token->type == TOKEN_TYPE_VARIABLE) return token->content.var->sql_expression; + else if (token->type == TOKEN_TYPE_PATH) + return token->content.path->name; else return NULL; } @@ -530,6 +549,86 @@ tracker_variable_binding_get_class (TrackerVariableBinding *binding) return binding->type; } +/* Path element */ +static void +tracker_path_element_free (TrackerPathElement *elem) +{ + g_free (elem->name); + g_free (elem); +} + +TrackerPathElement * +tracker_path_element_property_new (TrackerProperty *prop) +{ + TrackerPathElement *elem; + + g_return_val_if_fail (TRACKER_IS_PROPERTY (prop), NULL); + + elem = g_new0 (TrackerPathElement, 1); + elem->op = TRACKER_PATH_OPERATOR_NONE; + elem->type = tracker_property_get_data_type (prop); + elem->data.property = prop; + + return elem; +} + +TrackerPathElement * +tracker_path_element_operator_new (TrackerPathOperator op, + TrackerPathElement *child1, + TrackerPathElement *child2) +{ + TrackerPathElement *elem; + + g_return_val_if_fail (op != TRACKER_PATH_OPERATOR_NONE, NULL); + g_return_val_if_fail (child1 != NULL, NULL); + g_return_val_if_fail (child2 == NULL || + op == TRACKER_PATH_OPERATOR_SEQUENCE || + op == TRACKER_PATH_OPERATOR_ALTERNATIVE, NULL); + + elem = g_new0 (TrackerPathElement, 1); + elem->op = op; + elem->data.composite.child1 = child1; + elem->data.composite.child2 = child2; + elem->type = child2 ? child2->type : child1->type; + + return elem; +} + +static void +tracker_path_element_set_unique_name (TrackerPathElement *elem, + gint id) +{ + const gchar *name = NULL; + + switch (elem->op) { + case TRACKER_PATH_OPERATOR_NONE: + name = tracker_property_get_name (elem->data.property); + break; + case TRACKER_PATH_OPERATOR_INVERSE: + name = "inv"; + break; + case TRACKER_PATH_OPERATOR_SEQUENCE: + name = "seq"; + break; + case TRACKER_PATH_OPERATOR_ALTERNATIVE: + name = "alt"; + break; + case TRACKER_PATH_OPERATOR_ZEROORONE: + name = "zeroorone"; + break; + case TRACKER_PATH_OPERATOR_ZEROORMORE: + name = "zeroormore"; + break; + case TRACKER_PATH_OPERATOR_ONEORMORE: + name = "oneormore"; + break; + default: + g_assert_not_reached (); + } + + elem->name = g_strdup_printf ("p%d_%s", id, name); +} + /* Context */ G_DEFINE_TYPE (TrackerContext, tracker_context, G_TYPE_INITIALLY_UNOWNED) @@ -627,6 +726,7 @@ tracker_select_context_finalize (GObject *object) g_clear_pointer (&context->predicate_variables, g_hash_table_unref); g_clear_pointer (&context->generated_variables, g_ptr_array_unref); g_clear_pointer (&context->literal_bindings, g_ptr_array_unref); + g_clear_pointer (&context->path_elements, g_ptr_array_unref); G_OBJECT_CLASS (tracker_select_context_parent_class)->finalize (object); } @@ -759,6 +859,42 @@ tracker_select_context_get_literal_binding_index (TrackerSelectContext *context return -1; } +void +tracker_select_context_add_path_element (TrackerSelectContext *context, + TrackerPathElement *path_elem) +{ + if (!context->path_elements) { + context->path_elements = + g_ptr_array_new_with_free_func ((GDestroyNotify) tracker_path_element_free); + } + + g_ptr_array_add (context->path_elements, path_elem); + tracker_path_element_set_unique_name (path_elem, + context->path_elements->len); +} + +TrackerPathElement * +tracker_select_context_lookup_path_element_for_property (TrackerSelectContext *context, + TrackerProperty *property) +{ + guint i; + + if (!context->path_elements) + return NULL; + + for (i = 0; i < context->path_elements->len; i++) { + TrackerPathElement *path_elem; + + path_elem = g_ptr_array_index (context->path_elements, i); + + if (path_elem->op == TRACKER_PATH_OPERATOR_NONE && + path_elem->data.property == property) + return path_elem; + } + + return NULL; +} + /* Triple context */ G_DEFINE_TYPE (TrackerTripleContext, tracker_triple_context, TRACKER_TYPE_CONTEXT) |