1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525
|
/*
4store - a clustered RDF storage and query engine
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Copyright 2006 Nick Lamb for Garlik.com
*/
#include <libxml/parser.h>
#include <string.h>
#include <stdlib.h>
#include <glib.h>
#include "../common/4store.h"
#include "../common/server.h"
#include "../common/error.h"
enum xmlstate {
WANT_TRIX,
WANT_GRAPH,
WANT_MODEL,
WANT_MODEL_URI,
WANT_TRIPLE,
WANT_SUBJECT,
WANT_SUBJECT_BNODE,
WANT_SUBJECT_PLAIN_LITERAL,
WANT_SUBJECT_TYPED_LITERAL,
WANT_SUBJECT_URI,
WANT_PREDICATE,
WANT_PREDICATE_URI,
WANT_OBJECT,
WANT_OBJECT_BNODE,
WANT_OBJECT_PLAIN_LITERAL,
WANT_OBJECT_TYPED_LITERAL,
WANT_OBJECT_URI,
DONE_TRIPLE,
DONE_TRIX,
};
typedef struct {
fsp_link *link;
int segments;
fs_rid bnodemax;
fs_rid m, s, p, o;
gchar *resource;
gchar *attr;
enum xmlstate state;
} xmlctxt;
#define RES_BUF_SIZE 256
static fs_resource resources[FS_MAX_SEGMENTS][RES_BUF_SIZE];
static int res_count[FS_MAX_SEGMENTS];
static void insert_resource(xmlctxt *ctxt,
fs_rid rid, fs_rid attr, char* lex)
{
/* TODO a cache might speed things up */
int segment = FS_RID_SEGMENT(rid, ctxt->segments);
resources[segment][res_count[segment]].rid = rid;
resources[segment][res_count[segment]].attr = attr;
resources[segment][res_count[segment]].lex = g_strdup(lex);
if (++res_count[segment] == RES_BUF_SIZE) {
fsp_res_import(ctxt->link, segment, RES_BUF_SIZE, resources[segment]);
for (int k = 0; k < RES_BUF_SIZE; ++k) {
g_free(resources[segment][k].lex);
}
res_count[segment] = 0;
}
}
static fs_rid insert_bnode(xmlctxt *ctxt)
{
fs_rid bnode = atoll(ctxt->resource);
/* TODO catch other people's non-numeric bNode IDs */
while (ctxt->bnodemax < bnode) {
fs_rid bnodenext;
fsp_bnode_alloc(ctxt->link, 1000000, &bnodenext, &(ctxt->bnodemax));
printf("(allocated bNode %lld to %lld)\n", bnodenext, ctxt->bnodemax);
}
return bnode | 0x8000000000000000LL;
}
static fs_rid insert_uri(xmlctxt *ctxt)
{
char *uri = ctxt->resource;
if (!uri || uri[0] == '\0') {
fs_error(LOG_ERR, "NULL URI inserted");
return 0;
}
fs_rid r = fs_hash_uri(uri);
insert_resource(ctxt, r, fs_c.empty, uri);
return r;
}
static fs_rid insert_plain(xmlctxt *ctxt)
{
char *text = ctxt->resource;
if (!text) {
text = ""; /* this case is actually the empty string */
}
fs_rid lang = fs_c.empty;
if (ctxt->attr) {
lang = fs_hash_literal(ctxt->attr, fs_c.empty);
insert_resource(ctxt, lang, fs_c.empty, ctxt->attr);
}
fs_rid r = fs_hash_literal(text, lang);
insert_resource(ctxt, r, lang, text);
return r;
}
static fs_rid insert_typed(xmlctxt *ctxt)
{
char *text = ctxt->resource;
fs_rid dt = fs_c.empty;
if (ctxt->attr) {
dt = fs_hash_uri(ctxt->attr);
insert_resource(ctxt, dt, fs_c.empty, ctxt->attr);
} else {
fs_error(LOG_ERR, "NULL type URI inserted");
}
fs_rid r = fs_hash_literal(text, dt);
insert_resource(ctxt, r, dt, text);
return r;
}
static void insert_quad(xmlctxt *ctxt)
{
fs_rid buffer[1][4];
int subj = FS_RID_SEGMENT(ctxt->s, ctxt->segments);
int obj = FS_RID_SEGMENT(ctxt->o, ctxt->segments);
buffer[0][0] = ctxt->m;
buffer[0][1] = ctxt->s;
buffer[0][2] = ctxt->p;
buffer[0][3] = ctxt->o;
fsp_quad_import(ctxt->link, subj, FS_BIND_BY_SUBJECT, 1, buffer);
fsp_quad_import(ctxt->link, obj, FS_BIND_BY_OBJECT, 1, buffer);
}
static void xml_start_document(void *user_data)
{
xmlctxt *ctxt = (xmlctxt *) user_data;
ctxt->state = WANT_TRIX;
}
static void xml_end_document(void *user_data)
{
xmlctxt *ctxt = (xmlctxt *) user_data;
if (ctxt->state != DONE_TRIX) {
fs_error(LOG_ERR, "TriX document ends abruptly");
}
g_free(ctxt->resource);
ctxt->resource = NULL;
g_free(ctxt->attr);
ctxt->attr = NULL;
}
void xml_start_element(void *user_data,
const xmlChar *name, const xmlChar **attrs)
{
xmlctxt *ctxt = (xmlctxt *) user_data;
switch (ctxt->state) {
case WANT_TRIX:
if (strcmp((char *) name, "TriX")) {
fs_error(LOG_ERR, "Not a TriX document");
exit(1);
} else {
ctxt->state = WANT_GRAPH;
}
break;
case WANT_GRAPH:
if (strcmp((char *) name, "graph")) {
fs_error(LOG_WARNING, "expected <graph> found <%s>", name);
} else {
ctxt->state = WANT_MODEL;
}
break;
case WANT_MODEL:
g_free(ctxt->resource);
ctxt->resource = NULL;
g_free(ctxt->attr);
ctxt->attr = NULL;
if (strcmp((char *) name, "uri")) {
fs_error(LOG_WARNING, "expected <uri> found <%s>", name);
} else {
ctxt->state = WANT_MODEL_URI;
}
break;
case WANT_TRIPLE:
if (strcmp((char *) name, "triple")) {
fs_error(LOG_WARNING, "expected <triple> found <%s>", name);
} else {
ctxt->state = WANT_SUBJECT;
}
break;
case WANT_SUBJECT:
g_free(ctxt->resource);
ctxt->resource = NULL;
g_free(ctxt->attr);
ctxt->attr = NULL;
if (!strcmp((char *) name, "uri")) {
ctxt->state = WANT_SUBJECT_URI;
} else if (!strcmp((char *) name, "id")) {
ctxt->state = WANT_SUBJECT_BNODE;
} else if (!strcmp((char *) name, "plainLiteral")) {
if (attrs && !strcmp((char *) attrs[0], "xml:lang")) {
ctxt->attr = g_strdup((char *) attrs[1]);
}
ctxt->state = WANT_SUBJECT_PLAIN_LITERAL;
} else if (!strcmp((char *) name, "typedLiteral")) {
if (attrs && !strcmp((char *) attrs[0], "datatype")) {
ctxt->attr = g_strdup((char *) attrs[1]);
} else {
fs_error(LOG_WARNING, "missing datatype on typed literal");
}
ctxt->state = WANT_SUBJECT_TYPED_LITERAL;
} else {
fs_error(LOG_WARNING, "expected subject found <%s>", name);
}
break;
case WANT_PREDICATE:
g_free(ctxt->resource);
ctxt->resource = NULL;
g_free(ctxt->attr);
ctxt->attr = NULL;
if (strcmp((char *) name, "uri")) {
fs_error(LOG_WARNING, "expected <uri> found <%s>", name);
} else {
ctxt->state = WANT_PREDICATE_URI;
}
break;
case WANT_OBJECT:
g_free(ctxt->resource);
ctxt->resource = NULL;
g_free(ctxt->attr);
ctxt->attr = NULL;
if (!strcmp((char *) name, "uri")) {
ctxt->state = WANT_OBJECT_URI;
} else if (!strcmp((char *) name, "id")) {
ctxt->state = WANT_OBJECT_BNODE;
} else if (!strcmp((char *) name, "plainLiteral")) {
if (attrs && !strcmp((char *) attrs[0], "xml:lang")) {
ctxt->attr = g_strdup((char *) attrs[1]);
}
ctxt->state = WANT_OBJECT_PLAIN_LITERAL;
} else if (!strcmp((char *) name, "typedLiteral")) {
if (attrs && !strcmp((char *) attrs[0], "datatype")) {
ctxt->attr = g_strdup((char *) attrs[1]);
} else {
fs_error(LOG_WARNING, "missing datatype on typed literal");
}
ctxt->state = WANT_OBJECT_TYPED_LITERAL;
} else {
fs_error(LOG_WARNING, "expected object found <%s>", name);
}
break;
case WANT_MODEL_URI:
case WANT_SUBJECT_BNODE:
case WANT_SUBJECT_PLAIN_LITERAL:
case WANT_SUBJECT_TYPED_LITERAL:
case WANT_SUBJECT_URI:
case WANT_PREDICATE_URI:
case WANT_OBJECT_BNODE:
case WANT_OBJECT_PLAIN_LITERAL:
case WANT_OBJECT_TYPED_LITERAL:
case WANT_OBJECT_URI:
case DONE_TRIPLE:
case DONE_TRIX:
fs_error(LOG_WARNING, "impossible document structure");
break;
}
}
void xml_end_element(void *user_data, const xmlChar *name)
{
xmlctxt *ctxt = (xmlctxt *) user_data;
switch (ctxt->state) {
case WANT_TRIX:
fs_error(LOG_WARNING, "impossible document structure");
break;
case WANT_GRAPH:
if (strcmp((char *) name, "TriX")) {
fs_error(LOG_WARNING, "expected </TriX> found </%s>", name);
} else {
ctxt->state = DONE_TRIX;
}
break;
case WANT_TRIPLE:
if (strcmp((char *) name, "graph")) {
fs_error(LOG_WARNING, "expected </graph> found </%s>", name);
} else {
ctxt->state = WANT_GRAPH;
}
break;
case WANT_MODEL_URI:
if (strcmp((char *) name, "uri")) {
fs_error(LOG_WARNING, "expected </uri> found </%s>", name);
} else {
ctxt->m = insert_uri(ctxt);
ctxt->state = WANT_TRIPLE;
}
break;
case WANT_SUBJECT:
case WANT_PREDICATE:
case WANT_OBJECT:
fs_error(LOG_ERR, "missing part of triple");
ctxt->state = WANT_TRIPLE;
break;
case WANT_SUBJECT_BNODE:
if (strcmp((char *) name, "id")) {
fs_error(LOG_WARNING, "expected </id> found </%s>", name);
} else {
ctxt->s = insert_bnode(ctxt);
ctxt->state = WANT_PREDICATE;
}
break;
case WANT_SUBJECT_PLAIN_LITERAL:
if (strcmp((char *) name, "plainLiteral")) {
fs_error(LOG_WARNING, "expected </plainLiteral> found </%s>", name);
} else {
ctxt->s = insert_plain(ctxt);
ctxt->state = WANT_PREDICATE;
}
break;
case WANT_SUBJECT_TYPED_LITERAL:
if (strcmp((char *) name, "typedLiteral")) {
fs_error(LOG_WARNING, "expected </typedLiteral> found </%s>", name);
} else {
ctxt->s = insert_typed(ctxt);
ctxt->state = WANT_PREDICATE;
}
break;
case WANT_SUBJECT_URI:
if (strcmp((char *) name, "uri")) {
fs_error(LOG_WARNING, "expected </uri> found </%s>", name);
} else {
ctxt->s = insert_uri(ctxt);
ctxt->state = WANT_PREDICATE;
}
break;
case WANT_PREDICATE_URI:
if (strcmp((char *) name, "uri")) {
fs_error(LOG_WARNING, "expected </uri> found </%s>", name);
} else {
ctxt->p = insert_uri(ctxt);
ctxt->state = WANT_OBJECT;
}
break;
case WANT_OBJECT_BNODE:
if (strcmp((char *) name, "id")) {
fs_error(LOG_WARNING, "expected </id> found </%s>", name);
} else {
ctxt->o = insert_bnode(ctxt);
ctxt->state = DONE_TRIPLE;
}
break;
case WANT_OBJECT_PLAIN_LITERAL:
if (strcmp((char *) name, "plainLiteral")) {
fs_error(LOG_WARNING, "expected </plainLiteral> found </%s>", name);
} else {
ctxt->o = insert_plain(ctxt);
ctxt->state = DONE_TRIPLE;
}
break;
case WANT_OBJECT_TYPED_LITERAL:
if (strcmp((char *) name, "typedLiteral")) {
fs_error(LOG_WARNING, "expected </typedLiteral> found </%s>", name);
} else {
ctxt->o = insert_typed(ctxt);
ctxt->state = DONE_TRIPLE;
}
break;
case WANT_OBJECT_URI:
if (strcmp((char *) name, "uri")) {
fs_error(LOG_WARNING, "expected </uri> found </%s>", name);
} else {
ctxt->o = insert_uri(ctxt);
ctxt->state = DONE_TRIPLE;
}
break;
case DONE_TRIPLE:
if (strcmp((char *) name, "triple")) {
fs_error(LOG_WARNING, "expected </triple> found </%s>", name);
} else {
insert_quad(ctxt);
ctxt->state = WANT_TRIPLE;
}
break;
case WANT_MODEL:
case DONE_TRIX:
fs_error(LOG_WARNING, "impossible document structure");
break;
}
}
void xml_characters(void *user_data, const xmlChar *ch, int len)
{
xmlctxt *ctxt = (xmlctxt *) user_data;
switch (ctxt->state) {
case WANT_SUBJECT_BNODE:
case WANT_SUBJECT_PLAIN_LITERAL:
case WANT_SUBJECT_TYPED_LITERAL:
case WANT_SUBJECT_URI:
case WANT_PREDICATE_URI:
case WANT_OBJECT_BNODE:
case WANT_OBJECT_PLAIN_LITERAL:
case WANT_OBJECT_TYPED_LITERAL:
case WANT_OBJECT_URI:
case WANT_MODEL_URI:
if (ctxt->resource) {
gchar *tmp = ctxt->resource;
ctxt->resource = g_strdup_printf("%s%.*s", tmp, len, ch);
g_free(tmp);
} else {
ctxt->resource = g_strndup((gchar *) ch, len);
}
break;
default:
/* not important */
break;
}
}
xmlEntityPtr xml_get_entity(void * user_data, const xmlChar *name)
{
return xmlGetPredefinedEntity(name);
}
xmlSAXHandler sax = {
.startDocument = xml_start_document,
.endDocument = xml_end_document,
.startElement = xml_start_element,
.endElement = xml_end_element,
.characters = xml_characters,
};
static void flush_resources(xmlctxt *ctxt)
{
for (int s = 0; s < ctxt->segments; ++s) {
if (res_count[s] > 0) {
fsp_res_import(ctxt->link, s, res_count[s], resources[s]);
for (int k = 0; k < res_count[s]; ++k) {
g_free(resources[s][k].lex);
}
res_count[s] = 0;
}
if (fsp_res_import_commit(ctxt->link, s)) {
fs_error(LOG_ERR, "error during commit of resources");
}
}
}
static void flush_quads(xmlctxt *ctxt)
{
for (int s = 0; s < ctxt->segments; ++s) {
// quad_count[s] = 0;
if (fsp_quad_import_commit(ctxt->link, s, FS_BIND_BY_SUBJECT)) {
fs_error(LOG_ERR, "error during commit of quads by-subject");
}
if (fsp_quad_import_commit(ctxt->link, s, FS_BIND_BY_OBJECT)) {
fs_error(LOG_ERR, "error during commit of quads by-object");
}
}
}
void restore_file(fsp_link *link, char *filename)
{
xmlctxt *ctxt = calloc(sizeof(xmlctxt), 1);
ctxt->link = link;
ctxt->segments = fsp_link_segments(link);
for (int s = 0; s < ctxt->segments; ++s) {
res_count[s] = 0;
}
xmlSAXUserParseFile(&sax, (void *) ctxt, filename);
flush_resources(ctxt);
flush_quads(ctxt);
free(ctxt);
}
|