/* * rasqal_query_results_write_json1: * @iostr: #raptor_iostream to write the query to * @results: #rasqal_query_results query results format * @base_uri: #raptor_uri base URI of the output format * * Write a JSON version of the query results format to an * iostream in a format - INTERNAL. * * If the writing succeeds, the query results will be exhausted. * * Return value: non-0 on failure **/ static int rasqal_query_results_write_json1(rasqal_query_results_formatter* formatter, raptor_iostream *iostr, rasqal_query_results* results, raptor_uri *base_uri) { rasqal_world* world = rasqal_query_results_get_world(results); rasqal_query* query = rasqal_query_results_get_query(results); int i; int row_comma; int column_comma = 0; rasqal_query_results_type type; type = rasqal_query_results_get_type(results); if(type != RASQAL_QUERY_RESULTS_BINDINGS && type != RASQAL_QUERY_RESULTS_BOOLEAN) { rasqal_log_error_simple(query->world, RAPTOR_LOG_LEVEL_ERROR, &query->locator, "Cannot write JSON for %s query result format", rasqal_query_results_type_label(type)); return 1; } raptor_iostream_counted_string_write("{\n", 2, iostr); /* Header */ raptor_iostream_counted_string_write(" \"head\": {\n", 12, iostr); if(rasqal_query_results_is_bindings(results)) { raptor_iostream_counted_string_write(" \"vars\": [ ", 14, iostr); for(i = 0; 1; i++) { const unsigned char *name; name = rasqal_query_results_get_binding_name(results, i); if(!name) break; /* 'x', */ if(i > 0) raptor_iostream_counted_string_write(", ", 2, iostr); raptor_iostream_write_byte('\"', iostr); raptor_iostream_string_write(name, iostr); raptor_iostream_write_byte('\"', iostr); } raptor_iostream_counted_string_write(" ]\n", 3, iostr); } /* FIXME - could add link inside 'head': */ /* End Header */ raptor_iostream_counted_string_write(" },\n", 5, iostr); /* Boolean Results */ if(rasqal_query_results_is_boolean(results)) { raptor_iostream_counted_string_write(" ", 2, iostr); rasqal_iostream_write_json_boolean(iostr, "boolean", rasqal_query_results_get_boolean(results)); goto results3done; } /* Variable Binding Results */ raptor_iostream_counted_string_write(" \"results\": {\n", 15, iostr); if(query) { raptor_iostream_counted_string_write(" ", 4, iostr); rasqal_iostream_write_json_boolean(iostr, "ordered", (rasqal_query_get_order_condition(query, 0) != NULL)); raptor_iostream_counted_string_write(",\n", 2, iostr); raptor_iostream_counted_string_write(" ", 4, iostr); rasqal_iostream_write_json_boolean(iostr, "distinct", rasqal_query_get_distinct(query)); raptor_iostream_counted_string_write(",\n", 2, iostr); } raptor_iostream_counted_string_write(" \"bindings\" : [\n", 19, iostr); row_comma = 0; while(!rasqal_query_results_finished(results)) { if(row_comma) raptor_iostream_counted_string_write(",\n", 2, iostr); /* Result row */ raptor_iostream_counted_string_write(" {\n", 8, iostr); column_comma = 0; for(i = 0; i<rasqal_query_results_get_bindings_count(results); i++) { const unsigned char *name = rasqal_query_results_get_binding_name(results, i); rasqal_literal *l = rasqal_query_results_get_binding_value(results, i); if(column_comma) raptor_iostream_counted_string_write(",\n", 2, iostr); /* <binding> */ raptor_iostream_counted_string_write(" \"", 9, iostr); raptor_iostream_string_write(name, iostr); raptor_iostream_counted_string_write("\" : { ", 6, iostr); if(!l) { raptor_iostream_string_write("\"type\": \"unbound\", \"value\": null", iostr); } else { const unsigned char* str; size_t len; switch(l->type) { case RASQAL_LITERAL_URI: raptor_iostream_string_write("\"type\": \"uri\", \"value\": \"", iostr); str = RASQAL_GOOD_CAST(const unsigned char*, raptor_uri_as_counted_string(l->value.uri, &len)); raptor_string_ntriples_write(str, len, '"', iostr); raptor_iostream_write_byte('"', iostr); break; case RASQAL_LITERAL_BLANK: raptor_iostream_string_write("\"type\": \"bnode\", \"value\": \"", iostr); raptor_string_ntriples_write(l->string, l->string_len, '"', iostr); raptor_iostream_write_byte('"', iostr); break; case RASQAL_LITERAL_STRING: raptor_iostream_string_write("\"type\": \"literal\", \"value\": \"", iostr); raptor_string_ntriples_write(l->string, l->string_len, '"', iostr); raptor_iostream_write_byte('"', iostr); if(l->language) { raptor_iostream_string_write(",\n \"xml:lang\" : \"", iostr); raptor_iostream_string_write(RASQAL_GOOD_CAST(const unsigned char*, l->language), iostr); raptor_iostream_write_byte('"', iostr); } if(l->datatype) { raptor_iostream_string_write(",\n \"datatype\" : \"", iostr); str = RASQAL_GOOD_CAST(const unsigned char*, raptor_uri_as_counted_string(l->datatype, &len)); raptor_string_ntriples_write(str, len, '"', iostr); raptor_iostream_write_byte('"', iostr); } break; case RASQAL_LITERAL_PATTERN: case RASQAL_LITERAL_QNAME: case RASQAL_LITERAL_INTEGER: case RASQAL_LITERAL_XSD_STRING: case RASQAL_LITERAL_BOOLEAN: case RASQAL_LITERAL_DOUBLE: case RASQAL_LITERAL_FLOAT: case RASQAL_LITERAL_VARIABLE: case RASQAL_LITERAL_DECIMAL: case RASQAL_LITERAL_DATE: case RASQAL_LITERAL_DATETIME: case RASQAL_LITERAL_UDT: case RASQAL_LITERAL_INTEGER_SUBTYPE: case RASQAL_LITERAL_UNKNOWN: default: rasqal_log_error_simple(world, RAPTOR_LOG_LEVEL_ERROR, NULL, "Cannot turn literal type %u into XML", l->type); } } /* End Binding */ raptor_iostream_counted_string_write(" }", 2, iostr); column_comma = 1; }
static void roqet_query_walk(rasqal_query *rq, FILE *fh, int indent) { rasqal_query_verb verb; int i; rasqal_graph_pattern* gp; raptor_sequence *seq; verb = rasqal_query_get_verb(rq); roqet_write_indent(fh, indent); fprintf(fh, "query verb: %s\n", rasqal_query_verb_as_string(verb)); i = rasqal_query_get_distinct(rq); if(i != 0) { roqet_write_indent(fh, indent); fprintf(fh, "query asks for distinct results\n"); } i = rasqal_query_get_limit(rq); if(i >= 0) { roqet_write_indent(fh, indent); fprintf(fh, "query asks for result limits %d\n", i); } i = rasqal_query_get_offset(rq); if(i >= 0) { roqet_write_indent(fh, indent); fprintf(fh, "query asks for result offset %d\n", i); } seq = rasqal_query_get_bound_variable_sequence(rq); if(seq && raptor_sequence_size(seq) > 0) { fprintf(fh, "query bound variables (%d): ", raptor_sequence_size(seq)); i = 0; while(1) { rasqal_variable* v = (rasqal_variable*)raptor_sequence_get_at(seq, i); if(!v) break; if(i > 0) fputs(", ", fh); roqet_query_write_variable(fh, v); i++; } fputc('\n', fh); } gp = rasqal_query_get_query_graph_pattern(rq); if(!gp) return; seq = rasqal_query_get_construct_triples_sequence(rq); if(seq && raptor_sequence_size(seq) > 0) { roqet_write_indent(fh, indent); fprintf(fh, "query construct triples (%d) {\n", raptor_sequence_size(seq)); i = 0; while(1) { rasqal_triple* t = rasqal_query_get_construct_triple(rq, i); if(!t) break; roqet_write_indent(fh, indent + 2); fprintf(fh, "triple #%d { ", i); rasqal_triple_print(t, fh); fputs(" }\n", fh); i++; } roqet_write_indent(fh, indent); fputs("}\n", fh); } /* look for binding rows */ seq = rasqal_query_get_bindings_variables_sequence(rq); if(seq) { roqet_write_indent(fh, indent); fprintf(fh, "bindings variables (%d): ", raptor_sequence_size(seq)); i = 0; while(1) { rasqal_variable* v = rasqal_query_get_bindings_variable(rq, i); if(!v) break; if(i > 0) fputs(", ", fh); roqet_query_write_variable(fh, v); i++; } fputc('\n', fh); seq = rasqal_query_get_bindings_rows_sequence(rq); fprintf(fh, "bindings rows (%d) {\n", raptor_sequence_size(seq)); i = 0; while(1) { rasqal_row* row; row = rasqal_query_get_bindings_row(rq, i); if(!row) break; roqet_write_indent(fh, indent + 2); fprintf(fh, "row #%d { ", i); rasqal_row_print(row, fh); fputs("}\n", fh); i++; } } fputs("query ", fh); roqet_graph_pattern_walk(gp, -1, fh, indent); }