/*
* 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;
}
/*
* rasqal_query_results_write_sparql_xml:
* @iostr: #raptor_iostream to write the query results to
* @results: #rasqal_query_results query results input
* @base_uri: #raptor_uri base URI of the output format
*
* Write the fourth version of the SPARQL XML 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_sparql_xml(rasqal_query_results_formatter* formatter,
raptor_iostream *iostr,
rasqal_query_results* results,
raptor_uri *base_uri)
{
int rc=1;
rasqal_world* world = rasqal_query_results_get_world(results);
raptor_xml_writer* xml_writer=NULL;
raptor_namespace *res_ns=NULL;
raptor_namespace_stack *nstack=NULL;
raptor_xml_element *sparql_element=NULL;
raptor_xml_element *results_element=NULL;
raptor_xml_element *result_element=NULL;
raptor_xml_element *element1=NULL;
raptor_xml_element *binding_element=NULL;
raptor_xml_element *variable_element=NULL;
raptor_qname **attrs=NULL;
int i;
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(world, RAPTOR_LOG_LEVEL_ERROR,
NULL,
"Cannot write XML format v3 for %s query result format",
rasqal_query_results_type_label(type));
return 1;
}
nstack = raptor_new_namespaces(world->raptor_world_ptr, 1);
if(!nstack)
return 1;
xml_writer = raptor_new_xml_writer(world->raptor_world_ptr,
nstack,
iostr);
if(!xml_writer)
goto tidy;
res_ns=raptor_new_namespace(nstack,
NULL,
RASQAL_GOOD_CAST(const unsigned char*, "http://www.w3.org/2005/sparql-results#"),
0);
if(!res_ns)
goto tidy;
sparql_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "sparql"),
NULL, base_uri);
if(!sparql_element)
goto tidy;
raptor_xml_writer_start_element(xml_writer, sparql_element);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, "\n"), 1);
/* <head> */
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "head"),
NULL, base_uri);
if(!element1)
goto tidy;
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, " "), 2);
raptor_xml_writer_start_element(xml_writer, element1);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, "\n"), 1);
if(rasqal_query_results_is_bindings(results)) {
for(i=0; 1; i++) {
const unsigned char *name;
name=rasqal_query_results_get_binding_name(results, i);
if(!name)
break;
/* <variable name="x"/> */
variable_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*,"variable"),
NULL, base_uri);
if(!variable_element)
goto tidy;
attrs=(raptor_qname **)raptor_alloc_memory(sizeof(raptor_qname*));
if(!attrs)
goto tidy;
attrs[0] = raptor_new_qname_from_namespace_local_name(world->raptor_world_ptr,
res_ns,
RASQAL_GOOD_CAST(const unsigned char*,"name"),
RASQAL_GOOD_CAST(const unsigned char*, name)); /* attribute value */
if(!attrs[0]) {
raptor_free_memory((void*)attrs);
goto tidy;
}
raptor_xml_element_set_attributes(variable_element, attrs, 1);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, " "), 4);
raptor_xml_writer_empty_element(xml_writer, variable_element);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, "\n"), 1);
raptor_free_xml_element(variable_element);
variable_element=NULL;
}
}
/* FIXME - could add <link> inside <head> */
/* </head> */
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, " "), 2);
raptor_xml_writer_end_element(xml_writer, element1);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, "\n"), 1);
raptor_free_xml_element(element1);
element1=NULL;
/* Boolean Results */
if(rasqal_query_results_is_boolean(results)) {
result_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "boolean"),
NULL, base_uri);
if(!result_element)
goto tidy;
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, " "), 2);
raptor_xml_writer_start_element(xml_writer, result_element);
if(rasqal_query_results_get_boolean(results))
raptor_xml_writer_raw(xml_writer, RASQAL_XSD_BOOLEAN_TRUE);
else
raptor_xml_writer_raw(xml_writer, RASQAL_XSD_BOOLEAN_FALSE);
raptor_xml_writer_end_element(xml_writer, result_element);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, "\n"), 1);
goto results3done;
}
/* Variable Binding Results */
/* <results> */
results_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "results"),
NULL, base_uri);
if(!results_element)
goto tidy;
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, " "), 2);
raptor_xml_writer_start_element(xml_writer, results_element);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, "\n"), 1);
/* declare result element for later multiple use */
result_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "result"),
NULL, base_uri);
if(!result_element)
goto tidy;
while(!rasqal_query_results_finished(results)) {
/* <result> */
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, " "), 4);
raptor_xml_writer_start_element(xml_writer, result_element);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, "\n"), 1);
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);
/* <binding> */
binding_element=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "binding"),
NULL, base_uri);
if(!binding_element)
goto tidy;
attrs=(raptor_qname **)raptor_alloc_memory(sizeof(raptor_qname*));
if(!attrs)
goto tidy;
attrs[0] = raptor_new_qname_from_namespace_local_name(world->raptor_world_ptr,
res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "name"),
name);
if(!attrs[0]) {
raptor_free_memory((void*)attrs);
goto tidy;
}
raptor_xml_element_set_attributes(binding_element, attrs, 1);
raptor_xml_writer_raw_counted(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, " "), 6);
raptor_xml_writer_start_element(xml_writer, binding_element);
if(!l) {
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "unbound"),
NULL, base_uri);
if(!element1)
goto tidy;
raptor_xml_writer_empty_element(xml_writer, element1);
} else switch(l->type) {
case RASQAL_LITERAL_URI:
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "uri"),
NULL, base_uri);
if(!element1)
goto tidy;
raptor_xml_writer_start_element(xml_writer, element1);
raptor_xml_writer_cdata(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, raptor_uri_as_string(l->value.uri)));
raptor_xml_writer_end_element(xml_writer, element1);
break;
case RASQAL_LITERAL_BLANK:
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "bnode"),
NULL, base_uri);
if(!element1)
goto tidy;
raptor_xml_writer_start_element(xml_writer, element1);
raptor_xml_writer_cdata(xml_writer, RASQAL_GOOD_CAST(const unsigned char*, l->string));
raptor_xml_writer_end_element(xml_writer, element1);
break;
case RASQAL_LITERAL_STRING:
case RASQAL_LITERAL_UDT:
element1=raptor_new_xml_element_from_namespace_local_name(res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "literal"),
NULL, base_uri);
if(!element1)
goto tidy;
if(l->language || l->datatype) {
attrs=(raptor_qname **)raptor_alloc_memory(sizeof(raptor_qname*));
if(!attrs)
goto tidy;
if(l->language)
attrs[0]=raptor_new_qname(nstack,
RASQAL_GOOD_CAST(const unsigned char*, "xml:lang"),
RASQAL_GOOD_CAST(const unsigned char*, l->language));
else
attrs[0] = raptor_new_qname_from_namespace_local_name(world->raptor_world_ptr,
res_ns,
RASQAL_GOOD_CAST(const unsigned char*, "datatype"),
RASQAL_GOOD_CAST(const unsigned char*, raptor_uri_as_string(l->datatype)));
if(!attrs[0]) {
raptor_free_memory((void*)attrs);
goto tidy;
}
raptor_xml_element_set_attributes(element1, attrs, 1);
}
