| 1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
| 2 | * |
| 3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
| 4 | * |
| 5 | * "Hilbert II" is free software; you can redistribute |
| 6 | * it and/or modify it under the terms of the GNU General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2 of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | package org.qedeq.kernel.bo.logic.model; |
| 17 | |
| 18 | import java.util.ArrayList; |
| 19 | import java.util.List; |
| 20 | |
| 21 | import org.qedeq.base.trace.Trace; |
| 22 | import org.qedeq.kernel.bo.logic.common.FunctionConstant; |
| 23 | import org.qedeq.kernel.bo.logic.common.FunctionKey; |
| 24 | import org.qedeq.kernel.bo.logic.common.Operators; |
| 25 | import org.qedeq.kernel.bo.logic.common.PredicateConstant; |
| 26 | import org.qedeq.kernel.bo.logic.common.PredicateKey; |
| 27 | import org.qedeq.kernel.bo.logic.common.SubjectVariable; |
| 28 | import org.qedeq.kernel.bo.module.KernelQedeqBo; |
| 29 | import org.qedeq.kernel.bo.service.unicode.Latex2UnicodeParser; |
| 30 | import org.qedeq.kernel.se.base.list.Element; |
| 31 | import org.qedeq.kernel.se.base.list.ElementList; |
| 32 | import org.qedeq.kernel.se.common.ModuleContext; |
| 33 | |
| 34 | |
| 35 | /** |
| 36 | * This class calculates a new truth value for a given formula for a given interpretation. |
| 37 | * |
| 38 | * @author Michael Meyling |
| 39 | */ |
| 40 | public class DynamicDirectInterpreter { |
| 41 | |
| 42 | /** This class. */ |
| 43 | private static final Class CLASS = DynamicDirectInterpreter.class; |
| 44 | |
| 45 | /** We work with this module. */ |
| 46 | private KernelQedeqBo qedeq; |
| 47 | |
| 48 | /** Module context. Here were are currently. */ |
| 49 | private ModuleContext moduleContext; |
| 50 | |
| 51 | /** For formatting debug trace output. */ |
| 52 | private final StringBuffer deepness = new StringBuffer(); |
| 53 | |
| 54 | /** Model contains entities, functions, predicates. */ |
| 55 | private final DynamicModel model; |
| 56 | |
| 57 | /** Interpret subject variables. */ |
| 58 | private final SubjectVariableInterpreter subjectVariableInterpreter; |
| 59 | |
| 60 | /** Interpret predicate variables. */ |
| 61 | private final PredicateVariableInterpreter predicateVariableInterpreter; |
| 62 | |
| 63 | /** Interpret function variables. */ |
| 64 | private final FunctionVariableInterpreter functionVariableInterpreter; |
| 65 | |
| 66 | /** |
| 67 | * Constructor. |
| 68 | * |
| 69 | * @param qedeq We work with this module. |
| 70 | * @param model We work with this model. |
| 71 | */ |
| 72 | public DynamicDirectInterpreter(final KernelQedeqBo qedeq, final DynamicModel model) { |
| 73 | this(qedeq, model, new SubjectVariableInterpreter(model), new PredicateVariableInterpreter( |
| 74 | model), new FunctionVariableInterpreter(model)); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Constructor. |
| 79 | * |
| 80 | * @param qedeq We work with this module. |
| 81 | * @param model We work with this model. |
| 82 | * @param subjectVariableInterpreter Subject variable interpreter. |
| 83 | * @param predicateVariableInterpreter Predicate variable interpreter. |
| 84 | * @param functionVariableInterpreter Function variable interpreter. |
| 85 | */ |
| 86 | public DynamicDirectInterpreter(final KernelQedeqBo qedeq, final DynamicModel model, |
| 87 | final SubjectVariableInterpreter subjectVariableInterpreter, |
| 88 | final PredicateVariableInterpreter predicateVariableInterpreter, |
| 89 | final FunctionVariableInterpreter functionVariableInterpreter) { |
| 90 | this.qedeq = qedeq; |
| 91 | this.model = model; |
| 92 | this.subjectVariableInterpreter = subjectVariableInterpreter; |
| 93 | this.predicateVariableInterpreter = predicateVariableInterpreter; |
| 94 | this.functionVariableInterpreter = functionVariableInterpreter; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Calculate function value. |
| 99 | * |
| 100 | * @param constant This is the function definition. |
| 101 | * @param entities Function arguments. |
| 102 | * @return Result of calculation; |
| 103 | * @throws HeuristicException Calculation of function value failed. |
| 104 | */ |
| 105 | public Entity calculateFunctionValue(final FunctionConstant constant, |
| 106 | final Entity[] entities) throws HeuristicException { |
| 107 | final List params = constant.getSubjectVariables(); |
| 108 | for (int i = 0; i < entities.length; i++) { |
| 109 | final SubjectVariable var = (SubjectVariable) params.get(i); |
| 110 | subjectVariableInterpreter.forceAddSubjectVariable(var, entities[i].getValue()); |
| 111 | } |
| 112 | Entity result; |
| 113 | try { |
| 114 | result = calculateTerm(constant.getDefiningTerm()); |
| 115 | } finally { |
| 116 | for (int i = entities.length - 1; i >= 0; i--) { |
| 117 | final SubjectVariable var = (SubjectVariable) params.get(i); |
| 118 | subjectVariableInterpreter.forceRemoveSubjectVariable(var); |
| 119 | } |
| 120 | } |
| 121 | return result; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Calculate function value. |
| 126 | * |
| 127 | * @param constant This is the predicate definition. |
| 128 | * @param entities Function arguments. |
| 129 | * @return Result of calculation; |
| 130 | * @throws HeuristicException Calculation failed. |
| 131 | */ |
| 132 | public boolean calculatePredicateValue(final PredicateConstant constant, |
| 133 | final Entity[] entities) throws HeuristicException { |
| 134 | final List params = constant.getSubjectVariables(); |
| 135 | for (int i = 0; i < entities.length; i++) { |
| 136 | final SubjectVariable var = (SubjectVariable) params.get(i); |
| 137 | subjectVariableInterpreter.forceAddSubjectVariable(var, entities[i].getValue()); |
| 138 | } |
| 139 | boolean result; |
| 140 | try { |
| 141 | result = calculateValue(constant.getDefiningFormula()); |
| 142 | } finally { |
| 143 | for (int i = entities.length - 1; i >= 0; i--) { |
| 144 | final SubjectVariable var = (SubjectVariable) params.get(i); |
| 145 | subjectVariableInterpreter.forceRemoveSubjectVariable(var); |
| 146 | } |
| 147 | } |
| 148 | return result; |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Calculate the truth value of a given formula is a tautology. This is done by checking with |
| 153 | * a model and certain variable values. |
| 154 | * |
| 155 | * @param moduleContext Where we are within an module. |
| 156 | * @param formula Formula. |
| 157 | * @return Truth value of formula. |
| 158 | * @throws HeuristicException We couldn't calculate the value. |
| 159 | */ |
| 160 | public boolean calculateValue(final ModuleContext moduleContext, final Element formula) |
| 161 | throws HeuristicException { |
| 162 | // this.startElement = formula; |
| 163 | this.moduleContext = new ModuleContext(moduleContext); |
| 164 | // this.startContext = new ModuleContext(moduleContext); |
| 165 | return calculateValue(formula); |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Calculate the truth value of a given formula is a tautology. This is done by checking with |
| 170 | * a model and certain variable values. |
| 171 | * |
| 172 | * @param formula Formula. |
| 173 | * @return Truth value of formula. |
| 174 | * @throws HeuristicException We couldn't calculate the value. |
| 175 | */ |
| 176 | private boolean calculateValue(final Element formula) throws HeuristicException { |
| 177 | final String method = "calculateValue(Element)"; |
| 178 | if (Trace.isDebugEnabled(CLASS)) { |
| 179 | Trace.param(CLASS, this, method, deepness.toString() + "formula", |
| 180 | Latex2UnicodeParser.transform(null, qedeq.getElement2Latex().getLatex(formula), 0)); |
| 181 | deepness.append("-"); |
| 182 | } |
| 183 | if (formula.isAtom()) { |
| 184 | throw new HeuristicException(HeuristicErrorCodes.WRONG_CALLING_CONVENTION_CODE, |
| 185 | HeuristicErrorCodes.WRONG_CALLING_CONVENTION_TEXT, moduleContext); |
| 186 | } |
| 187 | final KernelQedeqBo qedeqOld = qedeq; |
| 188 | final ModuleContext moduleContextOld = new ModuleContext(moduleContext); |
| 189 | final String context = getLocationWithinModule(); |
| 190 | boolean result; |
| 191 | try { |
| 192 | final ElementList list = formula.getList(); |
| 193 | setLocationWithinModule(context + ".getList()"); |
| 194 | final String op = list.getOperator(); |
| 195 | if (Operators.CONJUNCTION_OPERATOR.equals(op)) { |
| 196 | result = true; |
| 197 | for (int i = 0; i < list.size() && result; i++) { |
| 198 | setLocationWithinModule(context + ".getList().getElement(" + i + ")"); |
| 199 | result &= calculateValue(list.getElement(i)); |
| 200 | } |
| 201 | } else if (Operators.DISJUNCTION_OPERATOR.equals(op)) { |
| 202 | result = false; |
| 203 | for (int i = 0; i < list.size() && !result; i++) { |
| 204 | setLocationWithinModule(context + ".getList().getElement(" + i + ")"); |
| 205 | result |= calculateValue(list.getElement(i)); |
| 206 | } |
| 207 | } else if (Operators.EQUIVALENCE_OPERATOR.equals(op)) { |
| 208 | result = true; |
| 209 | boolean value = false; |
| 210 | for (int i = 0; i < list.size() && result; i++) { |
| 211 | setLocationWithinModule(context + ".getList().getElement(" + i + ")"); |
| 212 | if (i > 0) { |
| 213 | if (value != calculateValue(list.getElement(i))) { |
| 214 | result = false; |
| 215 | } |
| 216 | } else { |
| 217 | value = calculateValue(list.getElement(i)); |
| 218 | } |
| 219 | } |
| 220 | } else if (Operators.IMPLICATION_OPERATOR.equals(op)) { |
| 221 | result = false; |
| 222 | for (int i = 0; i < list.size() && !result; i++) { |
| 223 | setLocationWithinModule(context + ".getList().getElement(" + i + ")"); |
| 224 | if (i < list.size() - 1) { |
| 225 | result |= !calculateValue(list.getElement(i)); |
| 226 | } else { |
| 227 | result |= calculateValue(list.getElement(i)); |
| 228 | } |
| 229 | } |
| 230 | } else if (Operators.NEGATION_OPERATOR.equals(op)) { |
| 231 | result = true; |
| 232 | for (int i = 0; i < list.size() && result; i++) { |
| 233 | setLocationWithinModule(context + ".getList().getElement(" + i + ")"); |
| 234 | result &= !calculateValue(list.getElement(i)); |
| 235 | } |
| 236 | } else if (Operators.PREDICATE_VARIABLE.equals(op)) { |
| 237 | setLocationWithinModule(context + ".getList()"); |
| 238 | final Entity[] arguments = getEntities(list); |
| 239 | final PredicateVariable var = new PredicateVariable( |
| 240 | list.getElement(0).getAtom().getString(), list.size() - 1); |
| 241 | result = predicateVariableInterpreter.getPredicate(var) |
| 242 | .calculate(arguments); |
| 243 | } else if (Operators.UNIVERSAL_QUANTIFIER_OPERATOR.equals(op)) { |
| 244 | result = handleUniversalQuantifier(list); |
| 245 | } else if (Operators.EXISTENTIAL_QUANTIFIER_OPERATOR.equals(op)) { |
| 246 | result = handleExistentialQuantifier(list); |
| 247 | } else if (Operators.UNIQUE_EXISTENTIAL_QUANTIFIER_OPERATOR.equals(op)) { |
| 248 | result = handleUniqueExistentialQuantifier(list); |
| 249 | } else if (Operators.PREDICATE_CONSTANT.equals(op)) { |
| 250 | final String label = list.getElement(0).getAtom().getString(); |
| 251 | String name = label; |
| 252 | // System.out.println(label); |
| 253 | KernelQedeqBo newProp = qedeq; |
| 254 | while (name.indexOf(".") >= 0) { |
| 255 | name = name.substring(label.indexOf(".") + 1); |
| 256 | final String external = label.substring(0, label.indexOf(".")); |
| 257 | newProp = null; |
| 258 | if (qedeq.getKernelRequiredModules() != null) { |
| 259 | newProp = qedeq.getKernelRequiredModules().getKernelQedeqBo(external); |
| 260 | } |
| 261 | if (newProp == null) { |
| 262 | setLocationWithinModule(context + ".getList().getOperator()"); |
| 263 | throw new HeuristicException(HeuristicErrorCodes.UNKNOWN_IMPORT_MODULE_CODE, |
| 264 | HeuristicErrorCodes.UNKNOWN_IMPORT_MODULE_TEXT + "\"" + external + "\"" |
| 265 | + HeuristicErrorCodes.UNKNOWN_IMPORT_MODULE_TEXT_2 + "\"" + external |
| 266 | + "." + name + "\"", |
| 267 | moduleContext); |
| 268 | } |
| 269 | } |
| 270 | final PredicateKey predicateKey = new PredicateKey(name, "" + (list.size() - 1)); |
| 271 | final PredicateConstant constant = (newProp.getExistenceChecker() != null |
| 272 | ? newProp.getExistenceChecker().get(predicateKey) : null); |
| 273 | if (constant != null) { |
| 274 | setLocationWithinModule(context + ".getList()"); |
| 275 | final Entity[] arguments = getEntities(list); |
| 276 | setModuleContext(newProp); |
| 277 | moduleContext = new ModuleContext(constant.getContext()); |
| 278 | // we must get the second argument of equivalence |
| 279 | moduleContext.setLocationWithinModule(moduleContext.getLocationWithinModule() |
| 280 | + ".getElement(1)"); |
| 281 | try { |
| 282 | result = calculatePredicateValue(constant, arguments); |
| 283 | } catch (HeuristicException e) { |
| 284 | setModuleContext(qedeqOld); |
| 285 | moduleContext = moduleContextOld; |
| 286 | setLocationWithinModule(context + ".getList().getElement(1)"); |
| 287 | throw new HeuristicException( |
| 288 | HeuristicErrorCodes.PREDICATE_CALCULATION_FAILED_CODE, |
| 289 | HeuristicErrorCodes.PREDICATE_CALCULATION_FAILED_TEXT + predicateKey, |
| 290 | moduleContext, e.getContext()); |
| 291 | } |
| 292 | } else { // should be initial predicate, must be in the model |
| 293 | final ModelPredicateConstant var = new ModelPredicateConstant(name, list.size() |
| 294 | - 1); |
| 295 | final Predicate predicate = model.getPredicateConstant(var); |
| 296 | if (predicate == null) { |
| 297 | setLocationWithinModule(context + ".getList().getOperator()"); |
| 298 | throw new HeuristicException( |
| 299 | HeuristicErrorCodes.UNKNOWN_PREDICATE_CONSTANT_CODE, |
| 300 | HeuristicErrorCodes.UNKNOWN_PREDICATE_CONSTANT_TEXT + var, |
| 301 | moduleContext); |
| 302 | } |
| 303 | setLocationWithinModule(context + ".getList()"); |
| 304 | final Entity[] arguments = getEntities(list); |
| 305 | result = predicate.calculate(arguments); |
| 306 | } |
| 307 | } else { |
| 308 | setLocationWithinModule(context + ".getList().getOperator()"); |
| 309 | throw new HeuristicException(HeuristicErrorCodes.UNKNOWN_OPERATOR_CODE, |
| 310 | HeuristicErrorCodes.UNKNOWN_OPERATOR_TEXT + op, moduleContext); |
| 311 | } |
| 312 | } finally { |
| 313 | // qedeq = qedeqOld; |
| 314 | setModuleContext(qedeqOld); |
| 315 | moduleContext = moduleContextOld; |
| 316 | setLocationWithinModule(context); |
| 317 | } |
| 318 | if (Trace.isDebugEnabled(CLASS)) { |
| 319 | deepness.setLength(deepness.length() > 0 ? deepness.length() - 1 : 0); |
| 320 | Trace.param(CLASS, this, method, deepness.toString() + Latex2UnicodeParser.transform( |
| 321 | null, qedeq.getElement2Latex().getLatex(formula), 0), result); |
| 322 | } |
| 323 | return result; |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * Handle universal quantifier operator. |
| 328 | * |
| 329 | * @param list Work on this formula. |
| 330 | * @return result Calculated truth value. |
| 331 | * @throws HeuristicException Calculation not possible. |
| 332 | */ |
| 333 | private boolean handleUniversalQuantifier(final ElementList list) |
| 334 | throws HeuristicException { |
| 335 | final String method = "handleUniversalQuantifier(ElementList)"; |
| 336 | final String context = getLocationWithinModule(); |
| 337 | boolean result = true; |
| 338 | final ElementList variable = list.getElement(0).getList(); |
| 339 | final SubjectVariable var = new SubjectVariable(variable.getElement(0).getAtom().getString()); |
| 340 | subjectVariableInterpreter.addSubjectVariable(var); |
| 341 | for (int i = 0; i < model.getEntitiesSize(); i++) { |
| 342 | if (Trace.isDebugEnabled(CLASS)) { |
| 343 | Trace.param(CLASS, this, method, deepness.toString() |
| 344 | + Latex2UnicodeParser.transform(null, qedeq.getElement2Latex() |
| 345 | .getLatex(variable), 0), model.getEntity(i)); |
| 346 | } |
| 347 | if (list.size() == 2) { |
| 348 | setLocationWithinModule(context + ".getElement(1)"); |
| 349 | result &= calculateValue(list.getElement(1)); |
| 350 | } else { // must be 3 |
| 351 | setLocationWithinModule(context + ".getElement(1)"); |
| 352 | final boolean result1 = calculateValue(list.getElement(1)); |
| 353 | setLocationWithinModule(context + ".getElement(2)"); |
| 354 | final boolean result2 = calculateValue(list.getElement(2)); |
| 355 | result &= !result1 || result2; |
| 356 | } |
| 357 | if (!result) { |
| 358 | break; |
| 359 | } |
| 360 | subjectVariableInterpreter.increaseSubjectVariableSelection(var); |
| 361 | } |
| 362 | subjectVariableInterpreter.removeSubjectVariable(var); |
| 363 | return result; |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * Handle existential quantifier operator. |
| 368 | * |
| 369 | * @param list Work on this formula. |
| 370 | * @return result Calculated truth value. |
| 371 | * @throws HeuristicException Calculation not possible. |
| 372 | */ |
| 373 | private boolean handleExistentialQuantifier(final ElementList list) |
| 374 | throws HeuristicException { |
| 375 | final String method = "handleExistentialQuantifier(ElementList)"; |
| 376 | final String context = getLocationWithinModule(); |
| 377 | boolean result = false; |
| 378 | final ElementList variable = list.getElement(0).getList(); |
| 379 | final SubjectVariable var = new SubjectVariable(variable.getElement(0).getAtom().getString()); |
| 380 | subjectVariableInterpreter.addSubjectVariable(var); |
| 381 | for (int i = 0; i < model.getEntitiesSize(); i++) { |
| 382 | if (Trace.isDebugEnabled(CLASS)) { |
| 383 | Trace.param(CLASS, this, method, deepness.toString() + Latex2UnicodeParser |
| 384 | .transform(null, qedeq.getElement2Latex().getLatex(variable), 0), |
| 385 | model.getEntity(i)); |
| 386 | } |
| 387 | if (list.size() == 2) { |
| 388 | setLocationWithinModule(context + ".getElement(1)"); |
| 389 | result |= calculateValue(list.getElement(1)); |
| 390 | } else { // must be 3 |
| 391 | setLocationWithinModule(context + ".getElement(1)"); |
| 392 | final boolean result1 = calculateValue(list.getElement(1)); |
| 393 | setLocationWithinModule(context + ".getElement(2)"); |
| 394 | final boolean result2 = calculateValue(list.getElement(2)); |
| 395 | result |= result1 && result2; |
| 396 | } |
| 397 | if (result) { |
| 398 | break; |
| 399 | } |
| 400 | subjectVariableInterpreter.increaseSubjectVariableSelection(var); |
| 401 | } |
| 402 | subjectVariableInterpreter.removeSubjectVariable(var); |
| 403 | return result; |
| 404 | } |
| 405 | |
| 406 | /** |
| 407 | * Handle unique existential quantifier operator. |
| 408 | * |
| 409 | * @param list Work on this formula. |
| 410 | * @return result Calculated truth value. |
| 411 | * @throws HeuristicException Calculation not possible. |
| 412 | */ |
| 413 | private boolean handleUniqueExistentialQuantifier(final ElementList list) |
| 414 | throws HeuristicException { |
| 415 | final String method = "handleUniqueExistentialQuantifier(ElementList)"; |
| 416 | final String context = getLocationWithinModule(); |
| 417 | boolean result = false; |
| 418 | final ElementList variable = list.getElement(0).getList(); |
| 419 | final SubjectVariable var = new SubjectVariable(variable.getElement(0).getAtom().getString()); |
| 420 | subjectVariableInterpreter.addSubjectVariable(var); |
| 421 | for (int i = 0; i < model.getEntitiesSize(); i++) { |
| 422 | if (Trace.isDebugEnabled(CLASS)) { |
| 423 | Trace.param(CLASS, this, method, deepness.toString() + Latex2UnicodeParser.transform(null, |
| 424 | qedeq.getElement2Latex().getLatex(variable), 0), model.getEntity(i)); |
| 425 | } |
| 426 | boolean val; |
| 427 | if (list.size() == 2) { |
| 428 | setLocationWithinModule(context + ".getList().getElement(1)"); |
| 429 | val = calculateValue(list.getElement(1)); |
| 430 | } else { // must be 3 |
| 431 | setLocationWithinModule(context + ".getList().getElement(1)"); |
| 432 | final boolean result1 = calculateValue(list.getElement(1)); |
| 433 | setLocationWithinModule(context + ".getList().getElement(2)"); |
| 434 | final boolean result2 = calculateValue(list.getElement(2)); |
| 435 | val = result1 && result2; |
| 436 | } |
| 437 | if (val) { |
| 438 | if (result) { |
| 439 | result = false; |
| 440 | break; |
| 441 | } |
| 442 | result = true; |
| 443 | } |
| 444 | subjectVariableInterpreter.increaseSubjectVariableSelection(var); |
| 445 | } |
| 446 | subjectVariableInterpreter.removeSubjectVariable(var); |
| 447 | return result; |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * Interpret terms. |
| 452 | * |
| 453 | * @param terms Interpret these terms. The first entry is stripped. |
| 454 | * @return Values. |
| 455 | * @throws HeuristicException evaluation failed. |
| 456 | */ |
| 457 | private Entity[] getEntities(final ElementList terms) |
| 458 | throws HeuristicException { |
| 459 | // System.out.println(terms); |
| 460 | final String context = getLocationWithinModule(); |
| 461 | final Entity[] result = new Entity[terms.size() - 1]; // strip first argument |
| 462 | for (int i = 0; i < result.length; i++) { |
| 463 | // System.out.println(i + " " + terms.getElement(i + 1)); |
| 464 | setLocationWithinModule(context + ".getElement(" + (i + 1) + ")"); |
| 465 | result[i] = calculateTerm(terms.getElement(i + 1)); |
| 466 | } |
| 467 | setLocationWithinModule(context); |
| 468 | return result; |
| 469 | } |
| 470 | |
| 471 | /** |
| 472 | * Calculate the term value of a given term. This is done by checking with |
| 473 | * a model and certain variable values. |
| 474 | * |
| 475 | * @param moduleContext Where we are within an module. |
| 476 | * @param term Term. |
| 477 | * @return Entity of model. |
| 478 | * @throws HeuristicException We couldn't calculate the value. |
| 479 | */ |
| 480 | public Entity calculateTerm(final ModuleContext moduleContext, final Element term) |
| 481 | throws HeuristicException { |
| 482 | this.moduleContext = moduleContext; |
| 483 | return calculateTerm(term); |
| 484 | } |
| 485 | |
| 486 | /** |
| 487 | * Interpret term. |
| 488 | * |
| 489 | * @param term Interpret this term. |
| 490 | * @return Value. |
| 491 | * @throws HeuristicException evaluation failed. |
| 492 | */ |
| 493 | private Entity calculateTerm(final Element term) |
| 494 | throws HeuristicException { |
| 495 | final String method = "calculateTerm(Element) "; |
| 496 | if (Trace.isDebugEnabled(CLASS)) { |
| 497 | Trace.param(CLASS, this, method, deepness.toString() + "term ", Latex2UnicodeParser.transform(null, |
| 498 | qedeq.getElement2Latex().getLatex(term), 0)); |
| 499 | deepness.append("-"); |
| 500 | } |
| 501 | if (!term.isList()) { |
| 502 | throw new RuntimeException("a term should be a list: " + term); |
| 503 | } |
| 504 | final KernelQedeqBo qedeqOld = qedeq; |
| 505 | final ModuleContext moduleContextOld = new ModuleContext(moduleContext); |
| 506 | final String context = getLocationWithinModule(); |
| 507 | Entity result = null; |
| 508 | try { |
| 509 | final ElementList termList = term.getList(); |
| 510 | final String op = termList.getOperator(); |
| 511 | if (Operators.SUBJECT_VARIABLE.equals(op)) { |
| 512 | final String text = termList.getElement(0).getAtom().getString(); |
| 513 | final SubjectVariable var = new SubjectVariable(text); |
| 514 | result = subjectVariableInterpreter.getEntity(var); |
| 515 | } else if (Operators.FUNCTION_VARIABLE.equals(op)) { |
| 516 | final FunctionVariable var = new FunctionVariable(termList.getElement(0).getAtom().getString(), |
| 517 | termList.size() - 1); |
| 518 | Function function = functionVariableInterpreter.getFunction(var); |
| 519 | setLocationWithinModule(context + ".getList()"); |
| 520 | result = function.map(getEntities(termList)); |
| 521 | } else if (Operators.FUNCTION_CONSTANT.equals(op)) { |
| 522 | final String label = termList.getElement(0).getAtom().getString(); |
| 523 | String name = label; |
| 524 | KernelQedeqBo newProp = qedeq; |
| 525 | if (label.indexOf(".") >= 0) { |
| 526 | name = label.substring(label.indexOf(".") + 1); |
| 527 | final String external = label.substring(0, label.indexOf(".")); |
| 528 | newProp = null; |
| 529 | if (qedeq.getKernelRequiredModules() != null) { |
| 530 | newProp = qedeq.getKernelRequiredModules().getKernelQedeqBo(external); |
| 531 | } |
| 532 | if (newProp == null) { |
| 533 | setLocationWithinModule(context + ".getList().getOperator()"); |
| 534 | throw new HeuristicException(HeuristicErrorCodes.UNKNOWN_IMPORT_MODULE_CODE, |
| 535 | HeuristicErrorCodes.UNKNOWN_IMPORT_MODULE_TEXT + "\"" + external + "\"" |
| 536 | + HeuristicErrorCodes.UNKNOWN_IMPORT_MODULE_TEXT_2 + "\"" + label + "\"", |
| 537 | moduleContext); |
| 538 | } |
| 539 | } |
| 540 | final FunctionKey functionKey = new FunctionKey(name, "" + (termList.size() - 1)); |
| 541 | FunctionConstant constant |
| 542 | = newProp.getExistenceChecker().get(functionKey); |
| 543 | if (constant != null) { |
| 544 | setLocationWithinModule(context + ".getList()"); |
| 545 | final Entity[] arguments = getEntities(termList); |
| 546 | setModuleContext(newProp); |
| 547 | moduleContext = new ModuleContext(constant.getContext()); |
| 548 | // we must get the second argument of equal relation |
| 549 | moduleContext.setLocationWithinModule(moduleContext.getLocationWithinModule() + ".getElement(2)"); |
| 550 | try { |
| 551 | result = calculateFunctionValue(constant, arguments); |
| 552 | } catch (HeuristicException e) { |
| 553 | setModuleContext(qedeqOld); |
| 554 | moduleContext = moduleContextOld; |
| 555 | setLocationWithinModule(context + ".getList().getElement(1)"); |
| 556 | throw new HeuristicException(HeuristicErrorCodes.PREDICATE_CALCULATION_FAILED_CODE, |
| 557 | HeuristicErrorCodes.PREDICATE_CALCULATION_FAILED_TEXT + functionKey, |
| 558 | moduleContext, e.getContext()); |
| 559 | } |
| 560 | } else { |
| 561 | final ModelFunctionConstant var = new ModelFunctionConstant(name, |
| 562 | termList.size() - 1); |
| 563 | Function function = model.getFunctionConstant(var); |
| 564 | if (function == null) { |
| 565 | setLocationWithinModule(context + ".getList().getOperator()"); |
| 566 | throw new HeuristicException(HeuristicErrorCodes.UNKNOWN_FUNCTION_CONSTANT_CODE, |
| 567 | HeuristicErrorCodes.UNKNOWN_FUNCTION_CONSTANT_TEXT + var, moduleContext); |
| 568 | } |
| 569 | setLocationWithinModule(context + ".getList()"); |
| 570 | final Entity[] arguments = getEntities(termList); |
| 571 | result = function.map(arguments); |
| 572 | } |
| 573 | } else if (Operators.CLASS_OP.equals(op)) { |
| 574 | List fullfillers = new ArrayList(); |
| 575 | ElementList variable = termList.getElement(0).getList(); |
| 576 | final SubjectVariable var = new SubjectVariable(variable.getElement(0).getAtom().getString()); |
| 577 | subjectVariableInterpreter.addSubjectVariable(var); |
| 578 | KernelQedeqBo newProp = qedeq; |
| 579 | if (qedeq.getExistenceChecker() != null) { |
| 580 | newProp = qedeq.getExistenceChecker().getClassOperatorModule(); |
| 581 | } |
| 582 | final PredicateConstant isSet = newProp.getExistenceChecker().getPredicate("isSet", 1); |
| 583 | if (isSet == null) { |
| 584 | throw new HeuristicException(HeuristicErrorCodes.UNKNOWN_TERM_OPERATOR_CODE, |
| 585 | HeuristicErrorCodes.UNKNOWN_TERM_OPERATOR_TEXT + "isSet(*)", moduleContext); |
| 586 | } |
| 587 | for (int i = 0; i < model.getEntitiesSize(); i++) { |
| 588 | setModuleContext(qedeqOld); |
| 589 | moduleContext = moduleContextOld; |
| 590 | setLocationWithinModule(context + ".getList().getElement(1)"); |
| 591 | if (calculateValue(termList.getElement(1))) { |
| 592 | setModuleContext(newProp); |
| 593 | moduleContext = newProp.getLabels().getPredicateContext("isSet", 1); |
| 594 | setLocationWithinModule(moduleContext.getLocationWithinModule() |
| 595 | + ".getFormula().getElement().getList().getElement(1)"); |
| 596 | try { |
| 597 | if (calculatePredicateValue(isSet, new Entity[] {model.getEntity(i)})) { |
| 598 | fullfillers.add(model.getEntity(i)); |
| 599 | } |
| 600 | } catch (HeuristicException e) { |
| 601 | setModuleContext(qedeqOld); |
| 602 | moduleContext = moduleContextOld; |
| 603 | setLocationWithinModule(context + ".getList().getElement(1)"); |
| 604 | throw new HeuristicException(HeuristicErrorCodes.PREDICATE_CALCULATION_FAILED_CODE, |
| 605 | HeuristicErrorCodes.PREDICATE_CALCULATION_FAILED_TEXT + isSet, |
| 606 | moduleContext, e.getContext()); |
| 607 | } |
| 608 | } |
| 609 | subjectVariableInterpreter.increaseSubjectVariableSelection(var); |
| 610 | } |
| 611 | result = model.comprehension((Entity[]) fullfillers.toArray(new Entity[] {})); |
| 612 | subjectVariableInterpreter.removeSubjectVariable(var); |
| 613 | } else { |
| 614 | setLocationWithinModule(context + ".getList().getOperator()"); |
| 615 | throw new HeuristicException(HeuristicErrorCodes.UNKNOWN_TERM_OPERATOR_CODE, |
| 616 | HeuristicErrorCodes.UNKNOWN_TERM_OPERATOR_TEXT + op, moduleContext); |
| 617 | } |
| 618 | } finally { |
| 619 | // qedeq = qedeqOld; |
| 620 | setModuleContext(qedeqOld); |
| 621 | moduleContext = moduleContextOld; |
| 622 | // System.out.println("module context old: " + moduleContextOld); |
| 623 | setLocationWithinModule(context); |
| 624 | } |
| 625 | if (Trace.isDebugEnabled(CLASS)) { |
| 626 | deepness.setLength(deepness.length() > 0 ? deepness.length() - 1 : 0); |
| 627 | Trace.param(CLASS, this, method, deepness.toString() + Latex2UnicodeParser.transform(null, |
| 628 | qedeq.getElement2Latex().getLatex(term), 0), result); |
| 629 | } |
| 630 | return result; |
| 631 | } |
| 632 | |
| 633 | private String getLocationWithinModule() { |
| 634 | return moduleContext.getLocationWithinModule(); |
| 635 | } |
| 636 | |
| 637 | protected ModuleContext getModuleContext() { |
| 638 | return moduleContext; |
| 639 | } |
| 640 | |
| 641 | protected void setModuleContext(final KernelQedeqBo qedeq) { |
| 642 | this.qedeq = qedeq; |
| 643 | moduleContext = new ModuleContext(qedeq.getModuleAddress()); |
| 644 | } |
| 645 | |
| 646 | protected void setLocationWithinModule(final String localContext) { |
| 647 | moduleContext.setLocationWithinModule(localContext); |
| 648 | } |
| 649 | |
| 650 | /** |
| 651 | * Change to next valuation. |
| 652 | * |
| 653 | * @return Is there a next new valuation? |
| 654 | */ |
| 655 | public boolean next() { |
| 656 | return subjectVariableInterpreter.next() || predicateVariableInterpreter.next() |
| 657 | || functionVariableInterpreter.next(); |
| 658 | } |
| 659 | |
| 660 | public String toString() { |
| 661 | final StringBuffer buffer = new StringBuffer(); |
| 662 | buffer.append("Current interpretation:\n"); |
| 663 | buffer.append("\t" + predicateVariableInterpreter + "\n"); |
| 664 | buffer.append("\t" + subjectVariableInterpreter + "\n"); |
| 665 | buffer.append("\t" + functionVariableInterpreter); |
| 666 | return buffer.toString(); |
| 667 | } |
| 668 | |
| 669 | /** |
| 670 | * Strips the reference to external modules. |
| 671 | * |
| 672 | * @param operator Might have reference to an external module. |
| 673 | * @return Operator as local reference. |
| 674 | */ |
| 675 | public String stripReference(final String operator) { |
| 676 | final int index = operator.lastIndexOf("."); |
| 677 | if (index >= 0 && index + 1 < operator.length()) { |
| 678 | return operator.substring(index + 1); |
| 679 | } |
| 680 | return operator; |
| 681 | } |
| 682 | |
| 683 | |
| 684 | /** |
| 685 | * Is the given predicate constant already defined? |
| 686 | * |
| 687 | * @param constant Predicate constant to check for. |
| 688 | * @return Is the given predicate constant already defined? |
| 689 | */ |
| 690 | public boolean hasPredicateConstant(final ModelPredicateConstant constant) { |
| 691 | return null != model.getPredicateConstant(constant); |
| 692 | } |
| 693 | |
| 694 | /** |
| 695 | * Is the given function constant already defined? |
| 696 | * |
| 697 | * @param constant Function constant to check for. |
| 698 | * @return Is the given function constant already defined? |
| 699 | */ |
| 700 | public boolean hasFunctionConstant(final ModelFunctionConstant constant) { |
| 701 | return null != model.getFunctionConstant(constant); |
| 702 | } |
| 703 | |
| 704 | /** |
| 705 | * Clear all variable settings. |
| 706 | */ |
| 707 | public void clearVariables() { |
| 708 | subjectVariableInterpreter.clear(); |
| 709 | predicateVariableInterpreter.clear(); |
| 710 | functionVariableInterpreter.clear(); |
| 711 | } |
| 712 | |
| 713 | /** |
| 714 | * Get model. |
| 715 | * |
| 716 | * @return Model we work with. |
| 717 | */ |
| 718 | public DynamicModel getModel() { |
| 719 | return model; |
| 720 | } |
| 721 | |
| 722 | |
| 723 | } |