rasqal_literal* redland_node_to_rasqal_literal(librdf_world* world, librdf_node *node) { rasqal_literal* l; if(librdf_node_is_resource(node)) { raptor_uri* uri=(raptor_uri*)librdf_new_uri_from_uri(librdf_node_get_uri(node)); l=rasqal_new_uri_literal(world->rasqal_world_ptr, uri); /* transfer uri ownership to literal */ } else if(librdf_node_is_literal(node)) { unsigned char *string; librdf_uri *uri; unsigned char *new_string; char *new_language=NULL; raptor_uri *new_datatype=NULL; size_t len; string=librdf_node_get_literal_value_as_counted_string(node, &len); new_string=(unsigned char*)rasqal_alloc_memory(len+1); if(!new_string) return NULL; strcpy((char*)new_string, (const char*)string); string=(unsigned char*)librdf_node_get_literal_value_language(node); if(string) { new_language=(char*)rasqal_alloc_memory(strlen((const char*)string)+1); if(!new_language) { rasqal_free_memory((void*)new_string); return NULL; } strcpy((char*)new_language, (const char*)string); } uri=librdf_node_get_literal_value_datatype_uri(node); if(uri) new_datatype=(raptor_uri*)librdf_new_uri_from_uri(uri); /* transfer new_string,new_language,new_datatype ownership to literal */ l = rasqal_new_string_literal(world->rasqal_world_ptr, (const unsigned char*)new_string, new_language, new_datatype, NULL); } else { unsigned char *blank=librdf_node_get_blank_identifier(node); unsigned char *new_blank; if(!blank) return NULL; new_blank=(unsigned char*)rasqal_alloc_memory(strlen((const char*)blank)+1); if(!new_blank) return NULL; strcpy((char*)new_blank, (const char*)blank); /* transfer new_blank ownership to literal */ l = rasqal_new_simple_literal(world->rasqal_world_ptr, RASQAL_LITERAL_BLANK, (const unsigned char*)new_blank); } return l; }
/* * rasqal_expression_evaluate_bnode_constructor: * @e: The expression to evaluate. * @eval_context: Evaluation context * * INTERNAL - Evaluate RASQAL_EXPR_BNODE (string) expression. * * Return value: A #rasqal_literal blank node value or NULL on failure. */ static rasqal_literal* rasqal_expression_evaluate_bnode_constructor(rasqal_expression *e, rasqal_evaluation_context *eval_context, int *error_p) { rasqal_world* world = eval_context->world; rasqal_literal *l1 = NULL; unsigned char *new_s = NULL; if(e->arg1) { const unsigned char *s; size_t len; l1 = rasqal_expression_evaluate2(e->arg1, eval_context, error_p); if(*error_p || !l1) goto failed; s = rasqal_literal_as_counted_string(l1, &len, eval_context->flags, error_p); if(*error_p) goto failed; new_s = (unsigned char*)RASQAL_MALLOC(cstring, len + 1); if(!new_s) goto failed; memcpy((char*)new_s, s, len + 1); rasqal_free_literal(l1); } else { new_s = rasqal_world_generate_bnodeid(world, NULL); if(!new_s) goto failed; } /* after this new_s is owned by the result */ return rasqal_new_simple_literal(world, RASQAL_LITERAL_BLANK, new_s); failed: if(error_p) *error_p = 1; if(l1) rasqal_free_literal(l1); return NULL; }
/** * rasqal_query_results_get_triple: * @query_results: #rasqal_query_results query_results * * Get the current triple in the result. * * The return value is a shared #raptor_statement. * * Return value: #raptor_statement or NULL if failed or results exhausted **/ raptor_statement* rasqal_query_results_get_triple(rasqal_query_results* query_results) { rasqal_query* query; int rc; rasqal_triple *t; rasqal_literal *s, *p, *o; raptor_statement *rs = NULL; unsigned char *nodeid; int skipped; RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(query_results, rasqal_query_results, NULL); if(query_results->failed || query_results->finished) return NULL; if(!rasqal_query_results_is_graph(query_results)) return NULL; query = query_results->query; if(!query) return NULL; if(query->verb == RASQAL_QUERY_VERB_DESCRIBE) return NULL; /* ensure we have a row to work on */ if(rasqal_query_results_ensure_have_row_internal(query_results)) return NULL; skipped = 0; while(1) { if(skipped) { rc = rasqal_query_results_next(query_results); if(rc) { rs = NULL; break; } query_results->current_triple_result = -1; } if(query_results->current_triple_result < 0) query_results->current_triple_result = 0; t = (rasqal_triple*)raptor_sequence_get_at(query->constructs, query_results->current_triple_result); rs = &query_results->result_triple; s = rasqal_literal_as_node(t->subject); if(!s) { rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_WARN, &query->locator, "Triple with unbound subject skipped"); skipped = 1; continue; } /* raptor v2 terms are copied, not shared */ if(rs->subject) { raptor_free_term(rs->subject); rs->subject = NULL; } switch(s->type) { case RASQAL_LITERAL_URI: rs->subject = raptor_new_term_from_uri(query_results->world->raptor_world_ptr, s->value.uri); break; case RASQAL_LITERAL_BLANK: nodeid = rasqal_prefix_id(query_results->result_count, (unsigned char*)s->string); rasqal_free_literal(s); if(!nodeid) { rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_FATAL, &query->locator, "Could not prefix subject blank identifier"); return NULL; } s = rasqal_new_simple_literal(query_results->world, RASQAL_LITERAL_BLANK, nodeid); if(!s) { rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_FATAL, &query->locator, "Could not create a new subject blank literal"); return NULL; } rs->subject = raptor_new_term_from_blank(query_results->world->raptor_world_ptr, nodeid); break; case RASQAL_LITERAL_QNAME: case RASQAL_LITERAL_PATTERN: case RASQAL_LITERAL_XSD_STRING: case RASQAL_LITERAL_BOOLEAN: case RASQAL_LITERAL_INTEGER: case RASQAL_LITERAL_DOUBLE: case RASQAL_LITERAL_FLOAT: case RASQAL_LITERAL_VARIABLE: case RASQAL_LITERAL_DECIMAL: case RASQAL_LITERAL_DATETIME: case RASQAL_LITERAL_UDT: case RASQAL_LITERAL_INTEGER_SUBTYPE: /* QNames should be gone by the time expression eval happens * Everything else is removed by rasqal_literal_as_node() above. */ case RASQAL_LITERAL_STRING: /* string [literal] subjects are not RDF */ case RASQAL_LITERAL_UNKNOWN: default: /* case RASQAL_LITERAL_STRING: */ rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_WARN, &query->locator, "Triple with non-URI/blank node subject skipped"); skipped = 1; break; } if(skipped) { if(s) rasqal_free_literal(s); continue; } p = rasqal_literal_as_node(t->predicate); if(!p) { rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_WARN, &query->locator, "Triple with unbound predicate skipped"); rasqal_free_literal(s); skipped = 1; continue; } switch(p->type) { case RASQAL_LITERAL_URI: /* raptor v2 terms are copied, not shared */ if(rs->predicate) { raptor_free_term(rs->predicate); rs->predicate = NULL; } rs->predicate = raptor_new_term_from_uri(query_results->world->raptor_world_ptr, p->value.uri); break; case RASQAL_LITERAL_QNAME: case RASQAL_LITERAL_PATTERN: case RASQAL_LITERAL_XSD_STRING: case RASQAL_LITERAL_BOOLEAN: case RASQAL_LITERAL_INTEGER: case RASQAL_LITERAL_DOUBLE: case RASQAL_LITERAL_FLOAT: case RASQAL_LITERAL_VARIABLE: case RASQAL_LITERAL_DECIMAL: case RASQAL_LITERAL_DATETIME: case RASQAL_LITERAL_UDT: case RASQAL_LITERAL_INTEGER_SUBTYPE: /* QNames should be gone by the time expression eval happens * Everything else is removed by rasqal_literal_as_node() above. */ case RASQAL_LITERAL_BLANK: case RASQAL_LITERAL_STRING: /* blank node or string [literal] predicates are not RDF */ case RASQAL_LITERAL_UNKNOWN: default: rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_WARN, &query->locator, "Triple with non-URI predicate skipped"); skipped = 1; break; } if(skipped) { rasqal_free_literal(s); if(p) rasqal_free_literal(p); continue; } o = rasqal_literal_as_node(t->object); if(!o) { rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_WARN, &query->locator, "Triple with unbound object skipped"); rasqal_free_literal(s); rasqal_free_literal(p); skipped = 1; continue; } /* raptor v2 terms are copied, not shared */ if(rs->object) { raptor_free_term(rs->object); rs->object = NULL; } switch(o->type) { case RASQAL_LITERAL_URI: rs->object = raptor_new_term_from_uri(query_results->world->raptor_world_ptr, o->value.uri); break; case RASQAL_LITERAL_BLANK: nodeid = rasqal_prefix_id(query_results->result_count, (unsigned char*)o->string); rasqal_free_literal(o); if(!nodeid) { rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_FATAL, &query->locator, "Could not prefix blank identifier"); rasqal_free_literal(s); rasqal_free_literal(p); return NULL; } o = rasqal_new_simple_literal(query_results->world, RASQAL_LITERAL_BLANK, nodeid); if(!o) { rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_FATAL, &query->locator, "Could not create a new subject blank literal"); rasqal_free_literal(s); rasqal_free_literal(p); return NULL; } rs->object = raptor_new_term_from_blank(query_results->world->raptor_world_ptr, nodeid); break; case RASQAL_LITERAL_STRING: rs->object = raptor_new_term_from_literal(query_results->world->raptor_world_ptr, o->string, o->datatype, (const unsigned char*)o->language); break; case RASQAL_LITERAL_QNAME: case RASQAL_LITERAL_PATTERN: case RASQAL_LITERAL_XSD_STRING: case RASQAL_LITERAL_BOOLEAN: case RASQAL_LITERAL_INTEGER: case RASQAL_LITERAL_DOUBLE: case RASQAL_LITERAL_FLOAT: case RASQAL_LITERAL_VARIABLE: case RASQAL_LITERAL_DECIMAL: case RASQAL_LITERAL_DATETIME: case RASQAL_LITERAL_UDT: case RASQAL_LITERAL_INTEGER_SUBTYPE: /* QNames should be gone by the time expression eval happens * Everything else is removed by rasqal_literal_as_node() above. */ case RASQAL_LITERAL_UNKNOWN: default: rasqal_log_error_simple(query_results->world, RAPTOR_LOG_LEVEL_WARN, &query->locator, "Triple with unknown object skipped"); skipped = 1; break; } if(skipped) { rasqal_free_literal(s); rasqal_free_literal(p); if(o) rasqal_free_literal(o); continue; } /* dispose previous triple if any */ if(query_results->triple) { rasqal_free_triple(query_results->triple); query_results->triple = NULL; } /* for saving s, p, o for later disposal */ query_results->triple = rasqal_new_triple(s, p, o); /* got triple, return it */ break; } return rs; }
static void rasqal_sparql_xml_sax2_end_element_handler(void *user_data, raptor_xml_element* xml_element) { rasqal_rowsource_sparql_xml_context* con; raptor_qname* name; int i; rasqal_sparql_xml_read_state state=STATE_unknown; con=(rasqal_rowsource_sparql_xml_context*)user_data; name=raptor_xml_element_get_name(xml_element); for(i=STATE_first; i <= STATE_last; i++) { if(!strcmp((const char*)raptor_qname_get_local_name(name), sparql_xml_element_names[i])) { state=(rasqal_sparql_xml_read_state)i; con->state=state; } } if(state == STATE_unknown) { fprintf(stderr, "UNKNOWN element %s\n", raptor_qname_get_local_name(name)); con->failed++; } con->depth--; #ifdef TRACE_XML if(con->trace) { pad(stderr, con->depth); fprintf(stderr, "End Element %s (%d)\n", raptor_qname_get_local_name(name), con->state); } #endif switch(con->state) { case STATE_head: /* Only now is the full number of variables known */ con->variables_count = rasqal_variables_table_get_named_variables_count(con->vars_table); con->rowsource->size = con->variables_count; break; case STATE_literal: if(1) { rasqal_literal* l; unsigned char* lvalue; raptor_uri* datatype_uri=NULL; char* language_str=NULL; lvalue=(unsigned char*)RASQAL_MALLOC(cstring, con->value_len+1); memcpy(lvalue, con->value, con->value_len + 1); if(con->datatype) datatype_uri = raptor_new_uri(con->world->raptor_world_ptr, (const unsigned char*)con->datatype); if(con->language) { size_t language_len = strlen(con->language); language_str=(char*)RASQAL_MALLOC(cstring, language_len + 1); memcpy(language_str, con->language, language_len + 1); } l = rasqal_new_string_literal_node(con->world, lvalue, language_str, datatype_uri); rasqal_row_set_value_at(con->row, con->result_offset, l); rasqal_free_literal(l); RASQAL_DEBUG3("Saving row result %d string value at offset %d\n", con->offset, con->result_offset); } break; case STATE_bnode: if(1) { rasqal_literal* l; unsigned char* lvalue; lvalue=(unsigned char*)RASQAL_MALLOC(cstring, con->value_len+1); memcpy(lvalue, con->value, con->value_len + 1); l = rasqal_new_simple_literal(con->world, RASQAL_LITERAL_BLANK, lvalue); rasqal_row_set_value_at(con->row, con->result_offset, l); rasqal_free_literal(l); RASQAL_DEBUG3("Saving row result %d bnode value at offset %d\n", con->offset, con->result_offset); } break; case STATE_uri: if(1) { raptor_uri* uri; rasqal_literal* l; uri = raptor_new_uri(con->world->raptor_world_ptr, (const unsigned char*)con->value); l = rasqal_new_uri_literal(con->world, uri); rasqal_row_set_value_at(con->row, con->result_offset, l); rasqal_free_literal(l); RASQAL_DEBUG3("Saving row result %d uri value at offset %d\n", con->offset, con->result_offset); } break; case STATE_result: if(con->row) { RASQAL_DEBUG2("Saving row result %d\n", con->offset); raptor_sequence_push(con->results_sequence, con->row); } con->row=NULL; break; case STATE_unknown: case STATE_sparql: case STATE_variable: case STATE_results: case STATE_binding: default: break; } if(con->value) { RASQAL_FREE(cstring, con->value); con->value=NULL; } }