| 1 | package tuffy.mln; |
| 2 | |
| 3 | import java.io.BufferedWriter; |
| 4 | import java.io.File; |
| 5 | import java.io.FileInputStream; |
| 6 | import java.io.FileOutputStream; |
| 7 | import java.io.IOException; |
| 8 | import java.io.OutputStreamWriter; |
| 9 | import java.sql.ResultSet; |
| 10 | import java.util.ArrayList; |
| 11 | import java.util.HashMap; |
| 12 | import java.util.HashSet; |
| 13 | import java.util.List; |
| 14 | |
| 15 | import org.postgresql.PGConnection; |
| 16 | |
| 17 | import tuffy.db.RDB; |
| 18 | import tuffy.db.SQLMan; |
| 19 | import tuffy.util.Config; |
| 20 | import tuffy.util.ExceptionMan; |
| 21 | import tuffy.util.FileMan; |
| 22 | import tuffy.util.StringMan; |
| 23 | import tuffy.util.UIMan; |
| 24 | |
| 25 | /** |
| 26 | * Predicate in First Order Logic. |
| 27 | */ |
| 28 | public class Predicate { |
| 29 | |
| 30 | private boolean isCompletelySpecified = false; |
| 31 | |
| 32 | public boolean isCurrentlyView = false; |
| 33 | |
| 34 | public void setCompeletelySpecified(boolean t) { |
| 35 | isCompletelySpecified = t; |
| 36 | //if (t) |
| 37 | // closedWorld = true; |
| 38 | } |
| 39 | |
| 40 | public boolean isCompletelySepcified() { |
| 41 | return isCompletelySpecified; |
| 42 | } |
| 43 | |
| 44 | private ArrayList<Integer> dependentAttributes = new ArrayList<Integer>(); |
| 45 | |
| 46 | /** |
| 47 | * Set the attribute at position i to be dependent. Non-dependent attributes |
| 48 | * form a possible-world key. |
| 49 | * |
| 50 | * @param i |
| 51 | */ |
| 52 | public void addDependentAttrPosition(int i) { |
| 53 | if (!dependentAttributes.contains(i)) { |
| 54 | dependentAttributes.add(i); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | public ArrayList<Integer> getDependentAttrPositions() { |
| 59 | return dependentAttributes; |
| 60 | } |
| 61 | |
| 62 | public ArrayList<Integer> getKeyAttrPositions() { |
| 63 | ArrayList<Integer> kpos = new ArrayList<Integer>(); |
| 64 | for (int i = 0; i < args.size(); i++) { |
| 65 | if (!dependentAttributes.contains(i)) { |
| 66 | kpos.add(i); |
| 67 | } |
| 68 | } |
| 69 | return kpos; |
| 70 | } |
| 71 | |
| 72 | public ArrayList<Integer> getLabelAttrPositions() { |
| 73 | ArrayList<Integer> kpos = new ArrayList<Integer>(); |
| 74 | for (int i = 0; i < args.size(); i++) { |
| 75 | if (dependentAttributes.contains(i)) { |
| 76 | kpos.add(i); |
| 77 | } |
| 78 | } |
| 79 | return kpos; |
| 80 | } |
| 81 | |
| 82 | public boolean hasDependentAttributes() { |
| 83 | return !dependentAttributes.isEmpty(); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Get attributes whose value depend on other attributes in any possible |
| 88 | * world. |
| 89 | * |
| 90 | * @see #getKeyAttrs |
| 91 | */ |
| 92 | public ArrayList<String> getDependentAttrs() { |
| 93 | ArrayList<String> dargs = new ArrayList<String>(); |
| 94 | for (int i : dependentAttributes) { |
| 95 | dargs.add(args.get(i)); |
| 96 | } |
| 97 | return dargs; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Get attributes that form a possible world key. |
| 102 | * |
| 103 | * @see #getDependentAttrs |
| 104 | */ |
| 105 | public ArrayList<String> getKeyAttrs() { |
| 106 | ArrayList<String> dargs = new ArrayList<String>(); |
| 107 | for (int i = 0; i < args.size(); i++) { |
| 108 | if (!dependentAttributes.contains(i)) { |
| 109 | dargs.add(args.get(i)); |
| 110 | } |
| 111 | } |
| 112 | return dargs; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Map from name to built-in predicates, e.g., same. |
| 117 | */ |
| 118 | private static HashMap<String, Predicate> builtInMap = new HashMap<String, Predicate>(); |
| 119 | |
| 120 | /** |
| 121 | * Return true if the argument is the name of a built-in predicate. |
| 122 | * |
| 123 | * @param s |
| 124 | * name of queried predicate |
| 125 | * @return true if s is a built-in predicate. |
| 126 | */ |
| 127 | public static boolean isBuiltInPredName(String s) { |
| 128 | return builtInMap.containsKey(s.toLowerCase()); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Return the predicate object with the name as the argument string. |
| 133 | * |
| 134 | * @param s |
| 135 | * name of queried predicate |
| 136 | * @return the predicate object with name s. |
| 137 | */ |
| 138 | public static Predicate getBuiltInPredByName(String s) { |
| 139 | return builtInMap.get(s.toLowerCase()); |
| 140 | } |
| 141 | |
| 142 | // logic related fields |
| 143 | /** |
| 144 | * Name of this predicate. |
| 145 | */ |
| 146 | private String name; |
| 147 | |
| 148 | /** |
| 149 | * Whether this predicate obeys closed-world assumption. |
| 150 | */ |
| 151 | private boolean closedWorld = false; |
| 152 | |
| 153 | private boolean hasSoftEvidence = false; |
| 154 | |
| 155 | |
| 156 | public boolean isImmutable() { |
| 157 | return closedWorld && !hasSoftEvidence; |
| 158 | } |
| 159 | |
| 160 | |
| 161 | /** |
| 162 | * List of argument types of this predicate. |
| 163 | */ |
| 164 | private ArrayList<Type> types = new ArrayList<Type>(); |
| 165 | |
| 166 | /** |
| 167 | * TODO: if unsat then {if scope then do scope, else do cross product} |
| 168 | */ |
| 169 | private boolean safeRefOnly = true; |
| 170 | |
| 171 | /** |
| 172 | * Whether this predicate is a built-in predicate. |
| 173 | */ |
| 174 | private boolean isBuiltIn = false; |
| 175 | |
| 176 | // DB related fields |
| 177 | /** |
| 178 | * DB object associated with this predicate. |
| 179 | */ |
| 180 | private RDB db = null; |
| 181 | |
| 182 | /** |
| 183 | * Name of the table of this predicate in DB. |
| 184 | */ |
| 185 | private String relName = null; |
| 186 | |
| 187 | /** |
| 188 | * The list of arguments of this predicate. The K-th argument is named |
| 189 | * "TypeK" by default, where "Type" if the type name of this argument, |
| 190 | * unless explicitly named. |
| 191 | */ |
| 192 | private ArrayList<String> args = new ArrayList<String>(); |
| 193 | |
| 194 | /** |
| 195 | * The assigned ID for this predicate in its parent MLN |
| 196 | * {@link Predicate#mln}. |
| 197 | */ |
| 198 | private int id = -1; |
| 199 | |
| 200 | /** |
| 201 | * The file object used to load evidence to DB |
| 202 | */ |
| 203 | protected File loadingFile = null; |
| 204 | |
| 205 | /** |
| 206 | * The buffer writer object used to flush evidence to file |
| 207 | */ |
| 208 | protected BufferedWriter loadingFileWriter = null; |
| 209 | |
| 210 | // MLN related fields |
| 211 | /** |
| 212 | * The parent MLN containing this predicate. |
| 213 | */ |
| 214 | private MarkovLogicNetwork mln; |
| 215 | |
| 216 | /** |
| 217 | * Set of clauses referencing this predicate. |
| 218 | */ |
| 219 | private HashSet<Clause> iclauses = new HashSet<Clause>(); |
| 220 | |
| 221 | /** |
| 222 | * Set of queries referencing this predicate. |
| 223 | */ |
| 224 | private ArrayList<Atom> queries = new ArrayList<Atom>(); |
| 225 | |
| 226 | /** |
| 227 | * Whether all unknown atoms of this predicate are queries. |
| 228 | */ |
| 229 | private boolean isAllQuery = false; |
| 230 | |
| 231 | /** |
| 232 | * Return the name of relational table containing the ID of active atoms |
| 233 | * associated with this predicate. |
| 234 | */ |
| 235 | public String getRelAct() { |
| 236 | return "act_" + relName; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Specify that all atoms of this predicate are queries. |
| 241 | */ |
| 242 | public void setAllQuery() { |
| 243 | if (isAllQuery) |
| 244 | return; |
| 245 | isAllQuery = true; |
| 246 | queries.clear(); |
| 247 | ArrayList<Integer> list = new ArrayList<Integer>(); |
| 248 | for (int i = 1; i <= arity(); i++) { |
| 249 | list.add(-i); |
| 250 | } |
| 251 | Tuple t = new Tuple(list); |
| 252 | Atom a = new Atom(this, t); |
| 253 | a.type = Atom.AtomType.QUERY; |
| 254 | queries.add(a); |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Specify whether this predicate obeys the closed world assumption. |
| 259 | */ |
| 260 | public void setClosedWorld(boolean t) { |
| 261 | closedWorld = t; |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Return the assigned ID of this predicate in its parent MLN. |
| 266 | */ |
| 267 | public int getID() { |
| 268 | return id; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * Return argument names of this predicate. The K-th argument is named |
| 273 | * "TypeK", where "Type" if the type name of this argument. |
| 274 | */ |
| 275 | public ArrayList<String> getArgs() { |
| 276 | return args; |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * Check if we need to ground this predicate on top of its evidence. A |
| 281 | * predicate needs not to ground if 1) it only appears in negative literal |
| 282 | * and 2) it follows closed world assumption. |
| 283 | * |
| 284 | * @return true if the closed world assumption is made on this predicate, |
| 285 | * and all literals of this predicate are negative |
| 286 | */ |
| 287 | public boolean noNeedToGround() { |
| 288 | return (safeRefOnly && closedWorld) || isCompletelySpecified; |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Assign an ID for this predicate. This predicate ID is used to encode |
| 293 | * tuple IDs of this predicate. |
| 294 | */ |
| 295 | public void setID(int aid) { |
| 296 | id = aid; |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * Return query atoms of this predicate. Used by KBMC. |
| 301 | */ |
| 302 | public ArrayList<Atom> getQueryAtoms() { |
| 303 | return queries; |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * Return clauses referencing this predicate. |
| 308 | */ |
| 309 | public HashSet<Clause> getRelatedClauses() { |
| 310 | return iclauses; |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * Register a query atom. |
| 315 | * |
| 316 | * @param q |
| 317 | * the query atom; could contain variables |
| 318 | * @see Predicate#storeQueries() |
| 319 | */ |
| 320 | public void addQuery(Atom q) { |
| 321 | if (isAllQuery) |
| 322 | return; |
| 323 | queries.add(q); |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * Ground query atoms and store the result in the database. |
| 328 | */ |
| 329 | public void storeQueries() { |
| 330 | for (Atom a : queries) { |
| 331 | groundAndStoreAtom(a); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | public boolean hasEvid = false; |
| 336 | |
| 337 | /** |
| 338 | * Ground an atom and store the result in the database. Repetitive |
| 339 | * invocations of this method could be expensive, since it involves both |
| 340 | * updates and inserts to the predicate table. |
| 341 | * |
| 342 | * First, for the grounded tuples satisfying this atom $a$ and already |
| 343 | * existing in database, it only update its club values. If this $a$ is |
| 344 | * query, then add query to club (0->1, 2->3). If this $a$ is evidence, then |
| 345 | * add evidence to club (0->2, 1->3). |
| 346 | * |
| 347 | * Then, for the grounded tuples satisfying this atom $a$ and not existing |
| 348 | * in database, it 1) select them with a $arity-way join in corresponding |
| 349 | * type instance table; 2) left join them with current version database; 3) |
| 350 | * select those not matching with any existing tuples; and 4) insert into |
| 351 | * the database. |
| 352 | * |
| 353 | */ |
| 354 | public void groundAndStoreAtom(Atom a) { |
| 355 | // input must be query or KBMC result |
| 356 | assert (a.club() >= 0 && a.club() <= 2); |
| 357 | // update. a is query/evidence |
| 358 | if (a.club() == 1 || a.club() == 2) { |
| 359 | String sql = ""; |
| 360 | ArrayList<String> conds = new ArrayList<String>(); |
| 361 | if (a.club() == 1) { // query |
| 362 | sql = "UPDATE " + getRelName() + " SET " |
| 363 | + "truth = truth, club = " + // not change the truthvalue |
| 364 | "club + 1 " + " WHERE "; |
| 365 | conds.add("(club = 0 OR club = 2)"); // turn none->query, |
| 366 | // evidence->query evidence |
| 367 | } else if (a.club() == 2) { // evidence |
| 368 | sql = "UPDATE " + getRelName() + " SET " + "truth = '" |
| 369 | + (a.truth ? 1 : 0) + "', club = " + // override the |
| 370 | // truth values. |
| 371 | "club + 2 " + " WHERE "; |
| 372 | conds.add("(club = 0 OR club = 1)"); // turn none->evidence, |
| 373 | // query->query evidence |
| 374 | } |
| 375 | int[] firstOccur = new int[a.args.dimension + 1]; |
| 376 | for (int i = 0; i < args.size(); i++) { |
| 377 | int v = a.args.get(i); // name of i-th element |
| 378 | if (v > 0) { // constant |
| 379 | conds.add(args.get(i) + "=" + v); // <i-th name> = v |
| 380 | } else { // variable |
| 381 | if (firstOccur[-v] == 0) { |
| 382 | firstOccur[-v] = i + 1; |
| 383 | } else { |
| 384 | int f = firstOccur[-v] - 1; |
| 385 | conds.add(args.get(i) + "=" + args.get(f)); // <i-th |
| 386 | // variable> |
| 387 | // = <f-th |
| 388 | // variable> |
| 389 | } |
| 390 | } |
| 391 | } |
| 392 | sql += SQLMan.andSelCond(conds); |
| 393 | // System.out.println(sql); |
| 394 | db.update(sql); |
| 395 | // System.out.println(" updated " + DB.lastUpdateRowCount); |
| 396 | } |
| 397 | |
| 398 | // insert here, queries are not grounded because it has been grounded as NONE/EVIDENCE. |
| 399 | if (!mln.isScoped(this) && !noNeedToGround() && a.club() != 1) { |
| 400 | String sql = "INSERT INTO " + getRelName() |
| 401 | + "(truth,prior,club," + StringMan.commaList(args) |
| 402 | + ")\n"; |
| 403 | ArrayList<String> selInsert = new ArrayList<String>(); |
| 404 | ArrayList<String> selNT = new ArrayList<String>(); |
| 405 | ArrayList<String> condMatch = new ArrayList<String>(); |
| 406 | ArrayList<String> condNull = new ArrayList<String>(); |
| 407 | ArrayList<String> baseTables = new ArrayList<String>(); |
| 408 | |
| 409 | // ////////////////////////////////// |
| 410 | //selInsert.add(nextTupleID()); |
| 411 | selInsert.add(a.truth == null ? "NULL" : "'" + (a.truth ? 1 : 0) |
| 412 | + "'"); |
| 413 | selInsert.add(a.prior != null ? Double.toString(a.prior) : "NULL"); |
| 414 | selInsert.add(Integer.toString(a.club())); |
| 415 | |
| 416 | int[] firstOccur = new int[a.args.dimension + 1]; |
| 417 | for (int i = 0; i < types.size(); i++) { |
| 418 | Type t = types.get(i); |
| 419 | int v = a.args.get(i); |
| 420 | String sNT; |
| 421 | if (v > 0) { // constant |
| 422 | sNT = "" + v; |
| 423 | } else { // variable |
| 424 | if (firstOccur[-v] == 0) { |
| 425 | firstOccur[-v] = i + 1; |
| 426 | sNT = "t" + i + ".constantID"; |
| 427 | baseTables.add(t.getRelName() + " t" + i); |
| 428 | } else { |
| 429 | int f = firstOccur[-v] - 1; |
| 430 | sNT = "t" + f + ".constantID"; |
| 431 | } |
| 432 | } |
| 433 | sNT += " AS " + args.get(i); |
| 434 | selNT.add(sNT); |
| 435 | selInsert.add("nt." + args.get(i)); |
| 436 | condMatch.add("nt." + args.get(i) + "=ot." + args.get(i)); |
| 437 | condNull.add("ot." + args.get(i) + " IS NULL"); |
| 438 | } |
| 439 | |
| 440 | sql += "SELECT " + StringMan.commaList(selInsert) + " FROM \n" |
| 441 | + "(SELECT " + StringMan.commaList(selNT) |
| 442 | + (baseTables.isEmpty() ? "" : " FROM ") |
| 443 | + StringMan.join(" CROSS JOIN ", baseTables) + ") nt \n" |
| 444 | + "LEFT JOIN\n" + getRelName() + " ot ON (\n" |
| 445 | + SQLMan.andSelCond(condMatch) + ") " + "WHERE " |
| 446 | + SQLMan.andSelCond(condNull); |
| 447 | |
| 448 | // System.out.println(sql); |
| 449 | db.update(sql); |
| 450 | // System.out.println(DB.lastUpdateRowCount); |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * Store an evidence in the "buffer". There is a buffer (in the form of a |
| 456 | * CSV file) for each predicate that holds the DB tuple formats of its |
| 457 | * evidence; this buffer will be flushed into the database once all evidence |
| 458 | * has been read. |
| 459 | * |
| 460 | * @param a |
| 461 | * the evidence; following Alchemy, it must be a ground atom |
| 462 | * @see Predicate#flushEvidence() |
| 463 | */ |
| 464 | public void addEvidence(Atom a) { |
| 465 | |
| 466 | hasEvid = true; |
| 467 | |
| 468 | if (a.isSoftEvidence()) |
| 469 | setHasSoftEvidence(true); |
| 470 | addEvidenceTuple(a); |
| 471 | } |
| 472 | |
| 473 | /** |
| 474 | * Determine whether this predicate can ground more atoms. This predicate |
| 475 | * does not have more to ground if the number of unknown grounds (none and |
| 476 | * query) in this predicate is smaller than the number of active atoms of |
| 477 | * this predicate. I.e., all the unknown atoms of this predicate is |
| 478 | * activated. |
| 479 | * |
| 480 | * @return whether there are more groundings can be generated |
| 481 | */ |
| 482 | public boolean hasMoreToGround() { |
| 483 | try { |
| 484 | String sql = "SELECT COUNT(*) from " + relName + " where club < 2"; |
| 485 | ResultSet rs = db.query(sql); |
| 486 | rs.next(); |
| 487 | int unknown = rs.getInt(1); |
| 488 | sql = "SELECT COUNT(*) FROM " + getRelAct(); |
| 489 | rs = db.query(sql); |
| 490 | rs.next(); |
| 491 | int active = rs.getInt(1); |
| 492 | if (unknown <= active) |
| 493 | return false; |
| 494 | } catch (Exception e) { |
| 495 | ExceptionMan.handle(e); |
| 496 | } |
| 497 | return true; |
| 498 | } |
| 499 | |
| 500 | public void appendToWriter(String str) throws IOException{ |
| 501 | this.loadingFileWriter.append(str); |
| 502 | } |
| 503 | |
| 504 | /** |
| 505 | * Add evidence tuple related to this predicate. The output of this function |
| 506 | * is written to file in format like: |
| 507 | * |
| 508 | * $tuple_id,$truth_value,$prior,$club_value,$variable_name,...... |
| 509 | * |
| 510 | * @param a |
| 511 | * the atom as evidence. This atom need to be a grounded atom. |
| 512 | */ |
| 513 | protected void addEvidenceTuple(Atom a) { |
| 514 | ArrayList<String> parts = new ArrayList<String>(); |
| 515 | if (a.truth == null) { |
| 516 | parts.add("TRUE"); |
| 517 | parts.add(a.prior != null ? Double.toString(a.prior) : "\\N"); |
| 518 | } else { |
| 519 | parts.add(a.truth ? "TRUE" : "FALSE"); |
| 520 | parts.add(""); |
| 521 | } |
| 522 | parts.add(Integer.toString(a.club())); |
| 523 | parts.addAll(a.sargs); |
| 524 | |
| 525 | try { |
| 526 | loadingFileWriter.append(StringMan.join(",", parts) + "\n"); |
| 527 | } catch (IOException e) { |
| 528 | ExceptionMan.handle(e); |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * Close all file handles. |
| 534 | */ |
| 535 | public void closeFiles() { |
| 536 | try { |
| 537 | if (loadingFileWriter != null) { |
| 538 | loadingFileWriter.close(); |
| 539 | loadingFileWriter = null; |
| 540 | } |
| 541 | } catch (IOException e) { |
| 542 | e.printStackTrace(); |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | /** |
| 547 | * Flush the evidence buffer to the predicate table, using the COPY |
| 548 | * statement in PostgreSQL. |
| 549 | * |
| 550 | * @see Predicate#addEvidence(Atom) |
| 551 | */ |
| 552 | public void flushEvidence(boolean... specialMode) { |
| 553 | try { |
| 554 | |
| 555 | if(this.hasEvid == true && specialMode.length>0){ |
| 556 | String sql = "DELETE FROM " + getRelName(); |
| 557 | db.execute(sql); |
| 558 | } |
| 559 | |
| 560 | // flush the file |
| 561 | loadingFileWriter.close(); |
| 562 | loadingFileWriter = null; |
| 563 | // copy into DB |
| 564 | ArrayList<String> cols = new ArrayList<String>(); |
| 565 | cols.add("truth"); |
| 566 | cols.add("prior"); |
| 567 | cols.add("club"); |
| 568 | cols.addAll(args); |
| 569 | FileInputStream in = new FileInputStream(loadingFile); |
| 570 | PGConnection con = (PGConnection) db.getConnection(); |
| 571 | String sql = "COPY " + getRelName() + |
| 572 | StringMan.commaListParen(cols) + " FROM STDIN CSV"; |
| 573 | con.getCopyAPI().copyIn(sql, in); |
| 574 | in.close(); |
| 575 | db.analyze(getRelName()); |
| 576 | FileMan.removeFile(loadingFile.getAbsolutePath()); |
| 577 | } catch (Exception e) { |
| 578 | ExceptionMan.handle(e); |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | /** |
| 583 | * Constructor of Predicate. |
| 584 | * |
| 585 | * @param mln |
| 586 | * the parent MLN that hosts this predicate |
| 587 | * @param aname |
| 588 | * the name; must be unique |
| 589 | * @param aClosedWorld |
| 590 | * indicates whether to make the closed-world asssumption |
| 591 | */ |
| 592 | public Predicate(MarkovLogicNetwork mln, String aname, boolean aClosedWorld) { |
| 593 | if (aname.startsWith("_")) { |
| 594 | UIMan.warn("Predicate names starting with an underscore " |
| 595 | + "are reserved for built-in predicates. " + "Declaring '" |
| 596 | + aname + "' as user-defined predicates " |
| 597 | + "may override built-in predicates."); |
| 598 | } |
| 599 | this.mln = mln; |
| 600 | name = aname; |
| 601 | closedWorld = aClosedWorld; |
| 602 | relName = "pred_" + name; |
| 603 | } |
| 604 | |
| 605 | /** |
| 606 | * Checks if there are any queries associated with this predicate. |
| 607 | */ |
| 608 | public boolean hasQuery() { |
| 609 | return !queries.isEmpty(); |
| 610 | } |
| 611 | |
| 612 | public void setDB(RDB adb){ |
| 613 | db = adb; |
| 614 | } |
| 615 | |
| 616 | |
| 617 | /** |
| 618 | * Initialize database objects for this predicate. |
| 619 | */ |
| 620 | public void prepareDB(RDB adb) { |
| 621 | db = adb; |
| 622 | loadingFile = new File(Config.getLoadingDir(), "loading_" + getName()); |
| 623 | try { |
| 624 | loadingFileWriter = new BufferedWriter(new OutputStreamWriter( |
| 625 | new FileOutputStream(loadingFile), "UTF8")); |
| 626 | } catch (Exception e) { |
| 627 | ExceptionMan.handle(e); |
| 628 | } |
| 629 | String sql; |
| 630 | |
| 631 | createTable(); |
| 632 | } |
| 633 | |
| 634 | /** |
| 635 | * Create table for storing groundings of this predicate. club: 1 = NONE; 2 |
| 636 | * = EVIDENCE: atom in evidence; 3 = QUERY: atom in query; 4 = QUEVID: atom |
| 637 | * in query as evidence. |
| 638 | */ |
| 639 | public void createTable(String... isTemplate) { |
| 640 | db.dropTable(relName); |
| 641 | db.dropView(relName); |
| 642 | String sql; |
| 643 | if(isTemplate.length > 0){ |
| 644 | sql = "CREATE TEMPORARY TABLE " + getRelName() + "(\n"; |
| 645 | }else{ |
| 646 | sql = "CREATE TABLE " + getRelName() + "(\n"; |
| 647 | } |
| 648 | sql += "id bigserial PRIMARY KEY,\n"; |
| 649 | sql += "truth BOOL,\n"; |
| 650 | sql += "prior FLOAT DEFAULT 0.9,\n"; |
| 651 | sql += "club INT DEFAULT 0,\n"; |
| 652 | sql += "atomID INT DEFAULT NULL,\n"; |
| 653 | ArrayList<String> argDefs = new ArrayList<String>(); |
| 654 | for (int i = 0; i < args.size(); i++) { |
| 655 | String attr = args.get(i); |
| 656 | Type t = types.get(i); |
| 657 | String ts = " bigint"; |
| 658 | if (t.isNonSymbolicType()) { |
| 659 | // TODO: fix expression variable binding |
| 660 | Type tn = t.getNonSymbolicType(); |
| 661 | if (tn == Type.Float) { |
| 662 | ts = " FLOAT8"; |
| 663 | } else if (tn == Type.Integer) { |
| 664 | ts = " bigint"; |
| 665 | } |
| 666 | } |
| 667 | argDefs.add(attr + ts); |
| 668 | } |
| 669 | sql += StringMan.commaList(argDefs) + ")"; |
| 670 | db.update(sql); |
| 671 | //sql = "CREATE INDEX " + getRelName() + "_truth_idx on " + getRelName() |
| 672 | //+ "(truth)"; |
| 673 | //db.update(sql); |
| 674 | |
| 675 | if (Config.build_predicate_table_indexes) { |
| 676 | for (String a : args) { |
| 677 | sql = "CREATE INDEX idx_" + id + "_" + a + " ON " + relName |
| 678 | + "(" + a + ")"; |
| 679 | db.update(sql); |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | } |
| 684 | |
| 685 | /** |
| 686 | * Return the arity of this predicate. |
| 687 | */ |
| 688 | public int arity() { |
| 689 | return args.size(); |
| 690 | } |
| 691 | |
| 692 | /** |
| 693 | * Register a clause referencing this predicate |
| 694 | * |
| 695 | * @param c |
| 696 | * a clause referencing this predicate |
| 697 | */ |
| 698 | public void addRelatedClause(Clause c) { |
| 699 | iclauses.add(c); |
| 700 | } |
| 701 | |
| 702 | /** |
| 703 | * Append a new argument without a user-provided name. |
| 704 | * |
| 705 | * @param t |
| 706 | * the type of the new argument |
| 707 | */ |
| 708 | public void appendArgument(Type t) { |
| 709 | types.add(t); |
| 710 | args.add(t.name() + types.size()); |
| 711 | argNameList.add(null); |
| 712 | } |
| 713 | |
| 714 | private HashMap<String, Integer> argNameMap = new HashMap<String, Integer>(); |
| 715 | private ArrayList<String> argNameList = new ArrayList<String>(); |
| 716 | |
| 717 | /** |
| 718 | * Append a new argument with a user provided name. |
| 719 | * |
| 720 | * @param t |
| 721 | * the type of the new argument |
| 722 | * @param name |
| 723 | * user-provided name for this argument/attribute |
| 724 | */ |
| 725 | public void appendArgument(Type t, String name) { |
| 726 | types.add(t); |
| 727 | args.add(t.name() + types.size()); |
| 728 | if (argNameMap.containsKey(name)) { |
| 729 | ExceptionMan.die("duplicate argument name '" + name |
| 730 | + "' in predicate '" + this.name + "'"); |
| 731 | } else if (name != null) { |
| 732 | argNameList.add(name); |
| 733 | argNameMap.put(name, args.size() - 1); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | /** |
| 738 | * Return the position of the given argument name. |
| 739 | * |
| 740 | * @param aname |
| 741 | * argument name |
| 742 | */ |
| 743 | public int getArgPositionByName(String aname) { |
| 744 | if (!argNameMap.containsKey(aname)) |
| 745 | return -1; |
| 746 | return argNameMap.get(aname); |
| 747 | } |
| 748 | |
| 749 | /** |
| 750 | * Mark the point when all arguments have been given. Go through the |
| 751 | * arguments again to try to give unnamed arguments names. |
| 752 | */ |
| 753 | public void sealDefinition() { |
| 754 | HashSet<Type> tset = new HashSet<Type>(); |
| 755 | HashSet<Type> dset = new HashSet<Type>(); |
| 756 | for (Type t : types) { |
| 757 | if (tset.contains(t)) |
| 758 | dset.add(t); |
| 759 | tset.add(t); |
| 760 | } |
| 761 | tset.removeAll(dset); |
| 762 | for (int i = 0; i < argNameList.size(); i++) { |
| 763 | if (argNameList.get(i) == null) { |
| 764 | Type t = types.get(i); |
| 765 | String tn = t.name(); |
| 766 | if (tset.contains(t) && !argNameMap.containsKey(tn)) { |
| 767 | argNameList.set(i, tn); |
| 768 | argNameMap.put(tn, i); |
| 769 | } |
| 770 | } |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | /** |
| 775 | * TODO: look into the implications of FDs |
| 776 | * |
| 777 | */ |
| 778 | @SuppressWarnings("unused") |
| 779 | private class FunctionalDependency { |
| 780 | HashSet<Integer> determinant = null; |
| 781 | public int dependent = -1; |
| 782 | } |
| 783 | |
| 784 | /** |
| 785 | * Functional dependencies for this predicate. |
| 786 | */ |
| 787 | private ArrayList<FunctionalDependency> fds = new ArrayList<FunctionalDependency>(); |
| 788 | |
| 789 | public void setMLN(MarkovLogicNetwork _mln){ |
| 790 | mln = _mln; |
| 791 | } |
| 792 | |
| 793 | /** |
| 794 | * Add a functional dependency for the attributes of this predicate |
| 795 | * |
| 796 | * @param determinant |
| 797 | * @param dependent |
| 798 | */ |
| 799 | public void addFunctionalDependency(List<String> determinant, |
| 800 | String dependent) { |
| 801 | HashSet<Integer> det = new HashSet<Integer>(); |
| 802 | for (String s : determinant) { |
| 803 | int idx = argNameMap.get(s); |
| 804 | if (idx < 0) { |
| 805 | ExceptionMan.die("unknown attribute name '" + s |
| 806 | + "' for predicate '" + name + "' when defining " |
| 807 | + "functional dependency."); |
| 808 | } else { |
| 809 | det.add(idx); |
| 810 | } |
| 811 | } |
| 812 | int dep = argNameMap.get(dependent); |
| 813 | if (dep < 0) { |
| 814 | ExceptionMan.die("unknown attribute name '" + dependent |
| 815 | + "' for predicate '" + name + "' when defining " |
| 816 | + "functional dependency."); |
| 817 | } |
| 818 | FunctionalDependency fd = new FunctionalDependency(); |
| 819 | fd.dependent = dep; |
| 820 | fd.determinant = det; |
| 821 | fds.add(fd); |
| 822 | } |
| 823 | |
| 824 | /** |
| 825 | * Return the type of the k-th argument. |
| 826 | */ |
| 827 | public Type getTypeAt(int k) { |
| 828 | return types.get(k); |
| 829 | } |
| 830 | |
| 831 | /** |
| 832 | * Check if this predicate makes the closed-world assumption. |
| 833 | */ |
| 834 | public boolean isClosedWorld() { |
| 835 | return closedWorld; |
| 836 | } |
| 837 | |
| 838 | /** |
| 839 | * Return the name of this predicate. |
| 840 | */ |
| 841 | public String getName() { |
| 842 | return name; |
| 843 | } |
| 844 | |
| 845 | /** |
| 846 | * Return the relational table name of this predicate.. |
| 847 | */ |
| 848 | public String getRelName() { |
| 849 | return relName; |
| 850 | } |
| 851 | |
| 852 | /** |
| 853 | * Set whether all references to this predicate are safe; i.e., all |
| 854 | * variables in corresponding positive literals are bound to other literals |
| 855 | * in the same clause. |
| 856 | * |
| 857 | * @param safeRefOnly |
| 858 | */ |
| 859 | public void setSafeRefOnly(boolean safeRefOnly) { |
| 860 | this.safeRefOnly = safeRefOnly; |
| 861 | } |
| 862 | |
| 863 | public boolean isSafeRefOnly() { |
| 864 | return safeRefOnly; |
| 865 | } |
| 866 | |
| 867 | public void setHasSoftEvidence(boolean hasSoftEvidence) { |
| 868 | this.hasSoftEvidence = hasSoftEvidence; |
| 869 | } |
| 870 | |
| 871 | public boolean hasSoftEvidence() { |
| 872 | return hasSoftEvidence; |
| 873 | } |
| 874 | |
| 875 | public boolean isBuiltIn() { |
| 876 | return isBuiltIn; |
| 877 | } |
| 878 | |
| 879 | } |