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rasqal_query_write.c
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rasqal_query_write.c
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/* -*- Mode: c; c-basic-offset: 2 -*-
*
* rasqal_query_write.c - Write query data structure as a syntax
*
* Copyright (C) 2004-2010, David Beckett http://www.dajobe.org/
* Copyright (C) 2004-2005, University of Bristol, UK http://www.bristol.ac.uk/
*
* This package is Free Software and part of Redland http://librdf.org/
*
* It is licensed under the following three licenses as alternatives:
* 1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
* 2. GNU General Public License (GPL) V2 or any newer version
* 3. Apache License, V2.0 or any newer version
*
* You may not use this file except in compliance with at least one of
* the above three licenses.
*
* See LICENSE.html or LICENSE.txt at the top of this package for the
* complete terms and further detail along with the license texts for
* the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
*
*
*/
#ifdef HAVE_CONFIG_H
#include <rasqal_config.h>
#endif
#ifdef WIN32
#include <win32_rasqal_config.h>
#endif
#include <stdio.h>
#include <string.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <stdarg.h>
#include "rasqal.h"
#include "rasqal_internal.h"
typedef struct
{
rasqal_world* world;
raptor_uri* type_uri;
raptor_uri* base_uri;
raptor_namespace_stack *nstack;
} sparql_writer_context;
static void rasqal_query_write_sparql_expression(sparql_writer_context *wc, raptor_iostream* iostr, rasqal_expression* e);
static void
rasqal_query_write_sparql_variable(sparql_writer_context *wc,
raptor_iostream* iostr, rasqal_variable* v)
{
if(v->expression) {
raptor_iostream_counted_string_write("( ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, v->expression);
raptor_iostream_counted_string_write(" AS ", 4, iostr);
}
if(v->type == RASQAL_VARIABLE_TYPE_ANONYMOUS)
raptor_iostream_counted_string_write("_:", 2, iostr);
else if(!v->expression)
raptor_iostream_write_byte('?', iostr);
raptor_iostream_string_write(v->name, iostr);
if(v->expression)
raptor_iostream_counted_string_write(" )", 2, iostr);
}
static void
rasqal_query_write_sparql_uri(sparql_writer_context *wc,
raptor_iostream* iostr, raptor_uri* uri)
{
size_t len;
unsigned char* string;
raptor_qname* qname;
qname = raptor_new_qname_from_namespace_uri(wc->nstack, uri, 10);
if(qname) {
const raptor_namespace* nspace = raptor_qname_get_namespace(qname);
if(!raptor_namespace_get_prefix(nspace))
raptor_iostream_write_byte(':', iostr);
raptor_qname_write(qname, iostr);
raptor_free_qname(qname);
return;
}
if(wc->base_uri)
string = raptor_uri_to_relative_counted_uri_string(wc->base_uri, uri, &len);
else
string = raptor_uri_as_counted_string(uri, &len);
raptor_iostream_write_byte('<', iostr);
raptor_string_ntriples_write(string, len, '>', iostr);
raptor_iostream_write_byte('>', iostr);
if(wc->base_uri)
raptor_free_memory(string);
}
static void
rasqal_query_write_sparql_literal(sparql_writer_context *wc,
raptor_iostream* iostr, rasqal_literal* l)
{
if(!l) {
raptor_iostream_counted_string_write("null", 4, iostr);
return;
}
switch(l->type) {
case RASQAL_LITERAL_URI:
rasqal_query_write_sparql_uri(wc, iostr, l->value.uri);
break;
case RASQAL_LITERAL_BLANK:
raptor_iostream_counted_string_write("_:", 2, iostr);
raptor_iostream_string_write(l->string, iostr);
break;
case RASQAL_LITERAL_STRING:
raptor_iostream_write_byte('"', iostr);
raptor_string_ntriples_write(l->string, l->string_len, '"', iostr);
raptor_iostream_write_byte('"', iostr);
if(l->language) {
raptor_iostream_write_byte('@', iostr);
raptor_iostream_string_write(l->language, iostr);
}
if(l->datatype) {
raptor_iostream_counted_string_write("^^", 2, iostr);
rasqal_query_write_sparql_uri(wc, iostr, l->datatype);
}
break;
case RASQAL_LITERAL_QNAME:
raptor_iostream_counted_string_write("QNAME(", 6, iostr);
raptor_iostream_counted_string_write(l->string, l->string_len, iostr);
raptor_iostream_write_byte(')', iostr);
break;
case RASQAL_LITERAL_INTEGER:
raptor_iostream_decimal_write(l->value.integer, iostr);
break;
case RASQAL_LITERAL_BOOLEAN:
case RASQAL_LITERAL_DOUBLE:
case RASQAL_LITERAL_FLOAT:
case RASQAL_LITERAL_DECIMAL:
raptor_iostream_counted_string_write(l->string, l->string_len, iostr);
break;
case RASQAL_LITERAL_VARIABLE:
rasqal_query_write_sparql_variable(wc, iostr, l->value.variable);
break;
case RASQAL_LITERAL_DATETIME:
case RASQAL_LITERAL_XSD_STRING:
case RASQAL_LITERAL_UDT:
case RASQAL_LITERAL_INTEGER_SUBTYPE:
if(1) {
raptor_uri* dt_uri;
raptor_iostream_write_byte('"', iostr);
raptor_string_ntriples_write(l->string, l->string_len, '"', iostr);
raptor_iostream_counted_string_write("\"^^", 3, iostr);
if(l->type == RASQAL_LITERAL_UDT)
dt_uri = l->datatype;
else
dt_uri = rasqal_xsd_datatype_type_to_uri(l->world, l->type);
rasqal_query_write_sparql_uri(wc, iostr, dt_uri);
}
break;
case RASQAL_LITERAL_UNKNOWN:
case RASQAL_LITERAL_PATTERN:
default:
RASQAL_FATAL2("Literal type %d cannot be written as a SPARQL literal", l->type);
}
}
static void
rasqal_query_write_sparql_triple(sparql_writer_context *wc,
raptor_iostream* iostr, rasqal_triple* triple)
{
rasqal_query_write_sparql_literal(wc, iostr, triple->subject);
raptor_iostream_write_byte(' ', iostr);
if(triple->predicate->type == RASQAL_LITERAL_URI &&
raptor_uri_equals(triple->predicate->value.uri, wc->type_uri))
raptor_iostream_write_byte('a', iostr);
else
rasqal_query_write_sparql_literal(wc, iostr, triple->predicate);
raptor_iostream_write_byte(' ', iostr);
rasqal_query_write_sparql_literal(wc, iostr, triple->object);
raptor_iostream_counted_string_write(" .", 2, iostr);
}
#define SPACES_LENGTH 80
static const char spaces[SPACES_LENGTH+1] = " ";
static void
rasqal_query_write_indent(raptor_iostream* iostr, int indent)
{
while(indent > 0) {
int sp = (indent > SPACES_LENGTH) ? SPACES_LENGTH : indent;
raptor_iostream_write_bytes(spaces, sizeof(char), sp, iostr);
indent -= sp;
}
}
static const char* const rasqal_sparql_op_labels[RASQAL_EXPR_LAST+1] = {
NULL, /* UNKNOWN */
"&&",
"||",
"=",
"!=",
"<",
">",
"<=",
">=",
"-",
"+",
"-",
"*",
"/",
NULL, /* REM */
NULL, /* STR EQ */
NULL, /* STR NEQ */
NULL, /* STR_MATCH */
NULL, /* STR_NMATCH */
NULL, /* TILDE */
"!",
NULL, /* LITERAL */
NULL, /* FUNCTION */
"BOUND",
"STR",
"LANG",
"DATATYPE",
"isIRI",
"isBLANK",
"isLITERAL",
NULL, /* CAST */
"ASC", /* ORDER BY ASC */
"DESC", /* ORDER BY DESC */
"LANGMATCHES",
"REGEX",
"ASC", /* GROUP BY ASC */
"DESC", /* GROUP BY DESC */
"COUNT",
NULL, /* VARSTAR */
"sameTerm",
"SUM",
"AVG",
"MIN",
"MAX",
"COALESCE",
"IF",
"URI",
"IRI",
"STRLANG",
"STRDT",
"BNODE",
"GROUP_CONCAT",
"SAMPLE",
"IN",
"NOT IN",
"isNUMERIC",
"YEAR",
"MONTH",
"DAY",
"HOURS",
"MINUTES",
"SECONDS",
"TIMEZONE",
"CURRENT_DATETIME",
"NOW",
"FROM_UNIXTIME",
"TO_UNIXTIME",
"CONCAT",
"STRLEN",
"SUBSTR",
"UCASE",
"LCASE",
"STRSTARTS",
"STRENDS",
"CONTAINS",
"ENCODE_FOR_URI",
};
static void
rasqal_query_write_sparql_expression_op(sparql_writer_context *wc,
raptor_iostream* iostr,
rasqal_expression* e)
{
rasqal_op op = e->op;
const char* string;
if(op > RASQAL_EXPR_LAST)
op = RASQAL_EXPR_UNKNOWN;
string = rasqal_sparql_op_labels[(int)op];
if(string)
raptor_iostream_string_write(string, iostr);
else
raptor_iostream_string_write("NONE", iostr);
}
static void
rasqal_query_write_sparql_expression(sparql_writer_context *wc,
raptor_iostream* iostr,
rasqal_expression* e)
{
int i;
int count;
switch(e->op) {
case RASQAL_EXPR_CURRENT_DATETIME:
case RASQAL_EXPR_NOW:
rasqal_query_write_sparql_expression_op(wc, iostr, e);
raptor_iostream_counted_string_write("()", 2, iostr);
break;
case RASQAL_EXPR_AND:
case RASQAL_EXPR_OR:
case RASQAL_EXPR_EQ:
case RASQAL_EXPR_NEQ:
case RASQAL_EXPR_LT:
case RASQAL_EXPR_GT:
case RASQAL_EXPR_LE:
case RASQAL_EXPR_GE:
case RASQAL_EXPR_PLUS:
case RASQAL_EXPR_MINUS:
case RASQAL_EXPR_STAR:
case RASQAL_EXPR_SLASH:
case RASQAL_EXPR_REM:
case RASQAL_EXPR_STR_EQ:
case RASQAL_EXPR_STR_NEQ:
case RASQAL_EXPR_STRLANG:
case RASQAL_EXPR_STRDT:
case RASQAL_EXPR_STRSTARTS:
case RASQAL_EXPR_STRENDS:
case RASQAL_EXPR_CONTAINS:
raptor_iostream_counted_string_write("( ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e->arg1);
raptor_iostream_write_byte(' ', iostr);
rasqal_query_write_sparql_expression_op(wc, iostr, e);
raptor_iostream_write_byte(' ', iostr);
rasqal_query_write_sparql_expression(wc, iostr, e->arg2);
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_BOUND:
case RASQAL_EXPR_STR:
case RASQAL_EXPR_LANG:
case RASQAL_EXPR_DATATYPE:
case RASQAL_EXPR_ISURI:
case RASQAL_EXPR_ISBLANK:
case RASQAL_EXPR_ISLITERAL:
case RASQAL_EXPR_ORDER_COND_ASC:
case RASQAL_EXPR_ORDER_COND_DESC:
case RASQAL_EXPR_GROUP_COND_ASC:
case RASQAL_EXPR_GROUP_COND_DESC:
case RASQAL_EXPR_COUNT:
case RASQAL_EXPR_SAMETERM:
case RASQAL_EXPR_SUM:
case RASQAL_EXPR_AVG:
case RASQAL_EXPR_MIN:
case RASQAL_EXPR_MAX:
case RASQAL_EXPR_URI:
case RASQAL_EXPR_IRI:
case RASQAL_EXPR_BNODE:
case RASQAL_EXPR_SAMPLE:
case RASQAL_EXPR_ISNUMERIC:
case RASQAL_EXPR_YEAR:
case RASQAL_EXPR_MONTH:
case RASQAL_EXPR_DAY:
case RASQAL_EXPR_HOURS:
case RASQAL_EXPR_MINUTES:
case RASQAL_EXPR_SECONDS:
case RASQAL_EXPR_TIMEZONE:
case RASQAL_EXPR_FROM_UNIXTIME:
case RASQAL_EXPR_TO_UNIXTIME:
case RASQAL_EXPR_STRLEN:
case RASQAL_EXPR_UCASE:
case RASQAL_EXPR_LCASE:
case RASQAL_EXPR_ENCODE_FOR_URI:
rasqal_query_write_sparql_expression_op(wc, iostr, e);
raptor_iostream_counted_string_write("( ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e->arg1);
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_LANGMATCHES:
case RASQAL_EXPR_REGEX:
case RASQAL_EXPR_IF:
case RASQAL_EXPR_SUBSTR:
rasqal_query_write_sparql_expression_op(wc, iostr, e);
raptor_iostream_counted_string_write("( ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e->arg1);
raptor_iostream_counted_string_write(", ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e->arg2);
if((e->op == RASQAL_EXPR_REGEX || e->op == RASQAL_EXPR_IF ||
e->op == RASQAL_EXPR_SUBSTR) && e->arg3) {
raptor_iostream_counted_string_write(", ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e->arg3);
}
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_TILDE:
case RASQAL_EXPR_BANG:
case RASQAL_EXPR_UMINUS:
rasqal_query_write_sparql_expression_op(wc, iostr, e);
raptor_iostream_counted_string_write("( ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e->arg1);
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_LITERAL:
rasqal_query_write_sparql_literal(wc, iostr, e->literal);
break;
case RASQAL_EXPR_FUNCTION:
raptor_uri_write(e->name, iostr);
raptor_iostream_counted_string_write("( ", 2, iostr);
if(e->flags & RASQAL_EXPR_FLAG_DISTINCT)
raptor_iostream_counted_string_write(" DISTINCT ", 10, iostr);
count = raptor_sequence_size(e->args);
for(i = 0; i < count ; i++) {
rasqal_expression* arg;
arg = (rasqal_expression*)raptor_sequence_get_at(e->args, i);
if(i > 0)
raptor_iostream_counted_string_write(", ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, arg);
}
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_CAST:
raptor_uri_write(e->name, iostr);
raptor_iostream_counted_string_write("( ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e->arg1);
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_VARSTAR:
raptor_iostream_write_byte('*', iostr);
break;
case RASQAL_EXPR_COALESCE:
case RASQAL_EXPR_CONCAT:
rasqal_query_write_sparql_expression_op(wc, iostr, e);
raptor_iostream_counted_string_write("( ", 2, iostr);
count = raptor_sequence_size(e->args);
for(i = 0; i < count ; i++) {
rasqal_expression* e2;
e2 = (rasqal_expression*)raptor_sequence_get_at(e->args, i);
if(i > 0)
raptor_iostream_counted_string_write(", ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e2);
}
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_GROUP_CONCAT:
raptor_iostream_counted_string_write("GROUP_CONCAT( ", 14, iostr);
if(e->flags & RASQAL_EXPR_FLAG_DISTINCT)
raptor_iostream_counted_string_write("DISTINCT ", 9, iostr);
count = raptor_sequence_size(e->args);
for(i = 0; i < count ; i++) {
rasqal_expression* arg;
arg = (rasqal_expression*)raptor_sequence_get_at(e->args, i);
if(i > 0)
raptor_iostream_counted_string_write(", ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, arg);
}
if(e->literal) {
raptor_iostream_counted_string_write(" ; SEPARATOR = ", 15, iostr);
rasqal_query_write_sparql_literal(wc, iostr, e->literal);
}
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_IN:
case RASQAL_EXPR_NOT_IN:
rasqal_query_write_sparql_expression(wc, iostr, e->arg1);
raptor_iostream_write_byte(' ', iostr);
rasqal_query_write_sparql_expression_op(wc, iostr, e);
raptor_iostream_counted_string_write(" (", 2, iostr);
count = raptor_sequence_size(e->args);
for(i = 0; i < count ; i++) {
rasqal_expression* e2;
e2 = (rasqal_expression*)raptor_sequence_get_at(e->args, i);
if(i > 0)
raptor_iostream_counted_string_write(", ", 2, iostr);
rasqal_query_write_sparql_expression(wc, iostr, e2);
}
raptor_iostream_counted_string_write(" )", 2, iostr);
break;
case RASQAL_EXPR_UNKNOWN:
case RASQAL_EXPR_STR_MATCH:
case RASQAL_EXPR_STR_NMATCH:
default:
RASQAL_FATAL2("Expression op %d cannot be written as a SPARQL expresson", e->op);
}
}
static void
rasqal_query_write_sparql_triple_data(sparql_writer_context *wc,
raptor_iostream* iostr,
raptor_sequence *triple_gps,
int indent)
{
int gp = 0;
for(gp = 0; 1; gp++) {
rasqal_graph_pattern* tgp;
int triple_index = 0;
tgp = (rasqal_graph_pattern*)raptor_sequence_get_at(triple_gps, gp);
if(!tgp)
break;
if(gp > 0)
raptor_iostream_write_byte('\n', iostr);
raptor_iostream_counted_string_write("{\n", 2, iostr);
indent += 2;
/* look for triples */
while(1) {
rasqal_triple* t = rasqal_graph_pattern_get_triple(tgp, triple_index);
if(!t)
break;
rasqal_query_write_indent(iostr, indent);
rasqal_query_write_sparql_triple(wc, iostr, t);
raptor_iostream_write_byte('\n', iostr);
triple_index++;
}
indent -= 2;
rasqal_query_write_indent(iostr, indent);
raptor_iostream_write_byte('}', iostr);
}
}
static int
rasqal_query_write_sparql_select(sparql_writer_context *wc,
raptor_iostream *iostr,
raptor_sequence* vars_seq)
{
int count = raptor_sequence_size(vars_seq);
int i;
for(i = 0; i < count; i++) {
rasqal_variable* v = (rasqal_variable*)raptor_sequence_get_at(vars_seq, i);
raptor_iostream_write_byte(' ', iostr);
rasqal_query_write_sparql_variable(wc, iostr, v);
}
return 0;
}
static void
rasqal_query_write_sparql_graph_pattern(sparql_writer_context *wc,
raptor_iostream* iostr,
rasqal_graph_pattern *gp,
int gp_index, int indent)
{
int triple_index = 0;
rasqal_graph_pattern_operator op;
raptor_sequence *seq;
int filters_count = 0;
int want_braces = 1;
op = rasqal_graph_pattern_get_operator(gp);
if(op == RASQAL_GRAPH_PATTERN_OPERATOR_SELECT) {
raptor_sequence* vars_seq;
rasqal_graph_pattern* where_gp;
raptor_iostream_counted_string_write("SELECT", 6, iostr);
vars_seq = rasqal_projection_get_variables_sequence(gp->projection);
rasqal_query_write_sparql_select(wc, iostr, vars_seq);
raptor_iostream_write_byte('\n', iostr);
rasqal_query_write_indent(iostr, indent);
raptor_iostream_counted_string_write("WHERE ", 6, iostr);
where_gp = rasqal_graph_pattern_get_sub_graph_pattern(gp, 0);
rasqal_query_write_sparql_graph_pattern(wc, iostr, where_gp, 0, indent);
/* FIXME - not implemented: modifiers */
return;
}
if(op == RASQAL_GRAPH_PATTERN_OPERATOR_LET) {
/* LAQRS */
raptor_iostream_counted_string_write("LET (", 5, iostr);
rasqal_query_write_sparql_variable(wc, iostr, gp->var);
raptor_iostream_counted_string_write(" := ", 4, iostr);
rasqal_query_write_sparql_expression(wc, iostr, gp->filter_expression);
raptor_iostream_counted_string_write(") .", 3, iostr);
return;
}
if(op == RASQAL_GRAPH_PATTERN_OPERATOR_SERVICE) {
rasqal_graph_pattern* service_gp;
/* LAQRS */
raptor_iostream_counted_string_write("SERVICE ", 8, iostr);
rasqal_query_write_sparql_literal(wc, iostr, gp->origin);
raptor_iostream_counted_string_write(" ", 1, iostr);
service_gp = rasqal_graph_pattern_get_sub_graph_pattern(gp, 0);
rasqal_query_write_sparql_graph_pattern(wc, iostr, service_gp, 0, indent);
return;
}
if(op == RASQAL_GRAPH_PATTERN_OPERATOR_OPTIONAL ||
op == RASQAL_GRAPH_PATTERN_OPERATOR_GRAPH) {
/* prefix verbs */
if(op == RASQAL_GRAPH_PATTERN_OPERATOR_OPTIONAL)
raptor_iostream_counted_string_write("OPTIONAL ", 9, iostr);
else {
raptor_iostream_counted_string_write("GRAPH ", 6, iostr);
rasqal_query_write_sparql_literal(wc, iostr, gp->origin);
raptor_iostream_write_byte(' ', iostr);
}
}
if(gp->op == RASQAL_GRAPH_PATTERN_OPERATOR_FILTER)
want_braces = 0;
if(want_braces) {
raptor_iostream_counted_string_write("{\n", 2, iostr);
indent += 2;
}
/* look for triples */
while(1) {
rasqal_triple* t = rasqal_graph_pattern_get_triple(gp, triple_index);
if(!t)
break;
rasqal_query_write_indent(iostr, indent);
rasqal_query_write_sparql_triple(wc, iostr, t);
raptor_iostream_write_byte('\n', iostr);
triple_index++;
}
/* look for sub-graph patterns */
seq = rasqal_graph_pattern_get_sub_graph_pattern_sequence(gp);
if(seq && raptor_sequence_size(seq) > 0) {
for(gp_index = 0; 1; gp_index++) {
rasqal_graph_pattern* sgp;
sgp = rasqal_graph_pattern_get_sub_graph_pattern(gp, gp_index);
if(!sgp)
break;
if(sgp->op == RASQAL_GRAPH_PATTERN_OPERATOR_FILTER) {
filters_count++;
continue;
}
if(!gp_index)
rasqal_query_write_indent(iostr, indent);
else {
if(op == RASQAL_GRAPH_PATTERN_OPERATOR_UNION)
/* infix verb */
raptor_iostream_counted_string_write(" UNION ", 7, iostr);
else {
/* must be prefix verb */
raptor_iostream_write_byte('\n', iostr);
rasqal_query_write_indent(iostr, indent);
}
}
rasqal_query_write_sparql_graph_pattern(wc, iostr, sgp, gp_index, indent);
}
raptor_iostream_write_byte('\n', iostr);
}
/* look for constraints */
if(filters_count > 0) {
for(gp_index = 0; 1; gp_index++) {
rasqal_graph_pattern* sgp;
rasqal_expression* expr;
sgp = rasqal_graph_pattern_get_sub_graph_pattern(gp, gp_index);
if(!sgp)
break;
if(sgp->op != RASQAL_GRAPH_PATTERN_OPERATOR_FILTER)
continue;
expr = rasqal_graph_pattern_get_filter_expression(sgp);
rasqal_query_write_indent(iostr, indent);
raptor_iostream_counted_string_write("FILTER( ", 8, iostr);
rasqal_query_write_sparql_expression(wc, iostr, expr);
raptor_iostream_counted_string_write(" )\n", 3, iostr);
}
}
if(want_braces) {
indent -= 2;
rasqal_query_write_indent(iostr, indent);
raptor_iostream_write_byte('}', iostr);
}
}
static void
rasqal_query_write_data_format_comment(sparql_writer_context* wc,
raptor_iostream *iostr,
rasqal_data_graph* dg)
{
if(dg->format_type || dg->format_name || dg->format_uri) {
raptor_iostream_counted_string_write("# format ", 9, iostr);
if(dg->format_type) {
raptor_iostream_counted_string_write("type ", 5, iostr);
raptor_iostream_string_write(dg->format_type, iostr);
}
if(dg->format_type) {
raptor_iostream_counted_string_write("name ", 5, iostr);
raptor_iostream_string_write(dg->format_name, iostr);
}
if(dg->format_type) {
raptor_iostream_counted_string_write("uri ", 4, iostr);
rasqal_query_write_sparql_uri(wc, iostr, dg->format_uri);
}
}
}
static int
rasqal_write_sparql_row(sparql_writer_context* wc,
raptor_iostream* iostr,
rasqal_row* row)
{
int i;
raptor_iostream_counted_string_write("( ", 2, iostr);
for(i = 0; i < row->size; i++) {
rasqal_literal* value = row->values[i];
if(i > 0)
raptor_iostream_counted_string_write(" ", 1, iostr);
if(value)
rasqal_query_write_sparql_literal(wc, iostr, value);
else
raptor_iostream_counted_string_write("UNDEF", 5, iostr);
}
raptor_iostream_counted_string_write(" )", 2, iostr);
return 0;
}
static int
rasqal_write_sparql_bindings(sparql_writer_context* wc,
raptor_iostream* iostr,
rasqal_bindings* bindings)
{
raptor_iostream_counted_string_write("BINDINGS", 8, iostr);
rasqal_query_write_sparql_select(wc, iostr, bindings->variables);
raptor_iostream_counted_string_write(" {\n", 3, iostr);
if(bindings->rows) {
int i;
for(i = 0; i < raptor_sequence_size(bindings->rows); i++) {
rasqal_row* row;
row = raptor_sequence_get_at(bindings->rows, i);
raptor_iostream_counted_string_write(" ", 2, iostr);
rasqal_write_sparql_row(wc, iostr, row);
raptor_iostream_counted_string_write("\n", 1, iostr);
}
}
raptor_iostream_counted_string_write("}\n", 2, iostr);
return 0;
}
int
rasqal_query_write_sparql_20060406(raptor_iostream *iostr,
rasqal_query* query, raptor_uri *base_uri)
{
int i;
sparql_writer_context wc;
int limit, offset;
wc.world = query->world;
wc.base_uri = NULL;
wc.type_uri = raptor_new_uri_for_rdf_concept(query->world->raptor_world_ptr,
(const unsigned char*)"type");
wc.nstack = raptor_new_namespaces(query->world->raptor_world_ptr, 1);
if(base_uri) {
raptor_iostream_counted_string_write("BASE ", 5, iostr);
rasqal_query_write_sparql_uri(&wc, iostr, base_uri);
raptor_iostream_write_byte('\n', iostr);
/* from now on all URIs are relative to this */
wc.base_uri = raptor_uri_copy(base_uri);
}
for(i = 0; 1 ; i++) {
raptor_namespace *nspace;
rasqal_prefix* p = rasqal_query_get_prefix(query, i);
if(!p)
break;
raptor_iostream_counted_string_write("PREFIX ", 7, iostr);
if(p->prefix)
raptor_iostream_string_write(p->prefix, iostr);
raptor_iostream_counted_string_write(": ", 2, iostr);
rasqal_query_write_sparql_uri(&wc, iostr, p->uri);
raptor_iostream_write_byte('\n', iostr);
/* Use this constructor so we copy a URI directly */
nspace = raptor_new_namespace_from_uri(wc.nstack, p->prefix, p->uri, i);
raptor_namespaces_start_namespace(wc.nstack, nspace);
}
if(query->explain)
raptor_iostream_counted_string_write("EXPLAIN ", 8, iostr);
/* Experimental LAQRS INSERT and DELETE (RASQAL_QUERY_VERB_INSERT
* and RASQAL_QUERY_VERB_DELETE) are handled in generic code
* below */
if(query->verb == RASQAL_QUERY_VERB_INSERT ||
query->verb == RASQAL_QUERY_VERB_DELETE) {
raptor_iostream_string_write("\n# Writing deprecated LAQRS INSERT/DELETE\n",
iostr);
}
/* Write SPARQL 1.1 (Draft) Update forms */
if(query->verb == RASQAL_QUERY_VERB_UPDATE) {
rasqal_update_operation* update;
/* Write SPARQL Update */
for(i = 0; (update = rasqal_query_get_update_operation(query, i)); i++) {
if(update->type == RASQAL_UPDATE_TYPE_UPDATE) {
/* update operations:
* WITH ... INSERT { template } DELETE { template } WHERE { template }
* INSERT/DELETE { template } WHERE { template }
* INSERT/DELETE DATA { triples }
*/
if(update->graph_uri) {
raptor_iostream_counted_string_write("WITH ", 5, iostr);
rasqal_query_write_sparql_uri(&wc, iostr, update->graph_uri);
raptor_iostream_write_byte('\n', iostr);
}
if(update->delete_templates) {
raptor_iostream_counted_string_write("DELETE ", 7, iostr);
if(update->flags & RASQAL_UPDATE_FLAGS_DATA)
raptor_iostream_counted_string_write("DATA ", 5, iostr);
rasqal_query_write_sparql_triple_data(&wc, iostr,
update->delete_templates,
0);
raptor_iostream_write_byte('\n', iostr);
}
if(update->insert_templates) {
raptor_iostream_counted_string_write("INSERT ", 7, iostr);
if(update->flags & RASQAL_UPDATE_FLAGS_DATA)
raptor_iostream_counted_string_write("DATA ", 5, iostr);
rasqal_query_write_sparql_triple_data(&wc, iostr,
update->insert_templates,
0);
raptor_iostream_write_byte('\n', iostr);
}
if(update->where) {
raptor_iostream_counted_string_write("WHERE ", 6, iostr);
rasqal_query_write_sparql_graph_pattern(&wc, iostr,
update->where,
-1, 0);
raptor_iostream_write_byte('\n', iostr);
}
} else {
/* admin operations:
* CLEAR / CLEAR GRAPH graph-uri
* CREATE (SILENT) GRAPH graph-uri
* DROP (SILENT) GRAPH graph-uri
* LOAD GRAPH graph-uri / LOAD doc-uri INTO graph-uri
*/
raptor_iostream_string_write(rasqal_update_type_label(update->type),
iostr);
if(update->flags & RASQAL_UPDATE_FLAGS_SILENT)
raptor_iostream_counted_string_write(" SILENT", 7, iostr);
if(update->document_uri) {
raptor_iostream_write_byte(' ', iostr);
rasqal_query_write_sparql_uri(&wc, iostr, update->document_uri);
}
if(update->graph_uri) {
if(update->type == RASQAL_UPDATE_TYPE_LOAD &&
update->document_uri)
raptor_iostream_counted_string_write(" INTO ", 6, iostr);
else
raptor_iostream_counted_string_write(" GRAPH ", 7, iostr);
rasqal_query_write_sparql_uri(&wc, iostr, update->graph_uri);
raptor_iostream_write_byte('\n', iostr);
}
}
}
goto tidy;
}
if(query->verb != RASQAL_QUERY_VERB_CONSTRUCT)
raptor_iostream_string_write(rasqal_query_verb_as_string(query->verb),
iostr);
if(query->distinct) {
if(query->distinct == 1)
raptor_iostream_counted_string_write(" DISTINCT", 9, iostr);
else
raptor_iostream_counted_string_write(" REDUCED", 8, iostr);
}
if(query->wildcard)
raptor_iostream_counted_string_write(" *", 2, iostr);
else if(query->verb == RASQAL_QUERY_VERB_DESCRIBE) {
raptor_sequence *lit_seq = query->describes;
int count = raptor_sequence_size(lit_seq);
for(i = 0; i < count; i++) {
rasqal_literal* l = (rasqal_literal*)raptor_sequence_get_at(lit_seq, i);
raptor_iostream_write_byte(' ', iostr);
rasqal_query_write_sparql_literal(&wc, iostr, l);
}
} else if(query->verb == RASQAL_QUERY_VERB_SELECT) {
rasqal_query_write_sparql_select(&wc, iostr, query->selects);
}
raptor_iostream_write_byte('\n', iostr);
if(query->data_graphs) {
for(i = 0; 1; i++) {
rasqal_data_graph* dg = rasqal_query_get_data_graph(query, i);
if(!dg)
break;
if(dg->flags & RASQAL_DATA_GRAPH_NAMED)
continue;
rasqal_query_write_data_format_comment(&wc, iostr, dg);
raptor_iostream_counted_string_write("FROM ", 5, iostr);
rasqal_query_write_sparql_uri(&wc, iostr, dg->uri);
raptor_iostream_counted_string_write("\n", 1, iostr);
}
for(i = 0; 1; i++) {
rasqal_data_graph* dg = rasqal_query_get_data_graph(query, i);
if(!dg)
break;
if(!(dg->flags & RASQAL_DATA_GRAPH_NAMED))
continue;
rasqal_query_write_data_format_comment(&wc, iostr, dg);
raptor_iostream_counted_string_write("FROM NAMED ", 11, iostr);
rasqal_query_write_sparql_uri(&wc, iostr, dg->name_uri);
raptor_iostream_write_byte('\n', iostr);
}
}
if(query->constructs) {
raptor_iostream_string_write("CONSTRUCT {\n", iostr);
for(i = 0; 1; i++) {
rasqal_triple* t = rasqal_query_get_construct_triple(query, i);
if(!t)
break;