Le studio de développement Mojang (propriété de Microsoft) ouvre la cuisine interne de Minecraft aux programmeurs. L’équipe a passé l’annonce via son compte Twitter.Depuis peu, certaines parties du moteur du jeu vidéo sont disponibles sous licence MIT. Ce choix du studio de développement permet à chaque développeur de s’approprier le code, le modifier et le distribuer, ce, à la seule condition de publier les nouveaux contenus avec la note de copyright initiale. L’équipe Mojang devrait ainsi engranger des contributions de nature à améliorer le moteur de jeu.
Le studio de développement Mojang ouvre Brigadier et DataFixerUpper. Sous Minecraft, le gamer dispose d’une ligne de commandes – des instructions sous forme de texte qui débutent avec le caractère /. Brigadier est la bibliothèque qui assure la conversion de ce texte en une fonction que le jeu va exécuter. « Beaucoup de personnes pensent qu’il s’agit d’une fonctionnalité aisée à implémenter, mais il n’en est rien », expliquent les développeurs. Le code de la portion chargée de lire la chaîne de caractère illustre l’ardeur de la tâche.
| Code java : | Sélectionner tout |
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 | // Copyright (c) Microsoft Corporation. All rights reserved. // Licensed under the MIT license. package com.mojang.brigadier; import com.mojang.brigadier.exceptions.CommandSyntaxException; import org.junit.Test; import static org.hamcrest.Matchers.equalTo; import static org.hamcrest.Matchers.is; import static org.junit.Assert.assertThat; import static org.junit.Assert.fail; public class StringReaderTest { @Test public void canRead() throws Exception { final StringReader reader = new StringReader("abc"); assertThat(reader.canRead(), is(true)); reader.skip(); // 'a' assertThat(reader.canRead(), is(true)); reader.skip(); // 'b' assertThat(reader.canRead(), is(true)); reader.skip(); // 'c' assertThat(reader.canRead(), is(false)); } @Test public void getRemainingLength() throws Exception { final StringReader reader = new StringReader("abc"); assertThat(reader.getRemainingLength(), is(3)); reader.setCursor(1); assertThat(reader.getRemainingLength(), is(2)); reader.setCursor(2); assertThat(reader.getRemainingLength(), is(1)); reader.setCursor(3); assertThat(reader.getRemainingLength(), is(0)); } @Test public void canRead_length() throws Exception { final StringReader reader = new StringReader("abc"); assertThat(reader.canRead(1), is(true)); assertThat(reader.canRead(2), is(true)); assertThat(reader.canRead(3), is(true)); assertThat(reader.canRead(4), is(false)); assertThat(reader.canRead(5), is(false)); } @Test public void peek() throws Exception { final StringReader reader = new StringReader("abc"); assertThat(reader.peek(), is('a')); assertThat(reader.getCursor(), is(0)); reader.setCursor(2); assertThat(reader.peek(), is('c')); assertThat(reader.getCursor(), is(2)); } @Test public void peek_length() throws Exception { final StringReader reader = new StringReader("abc"); assertThat(reader.peek(0), is('a')); assertThat(reader.peek(2), is('c')); assertThat(reader.getCursor(), is(0)); reader.setCursor(1); assertThat(reader.peek(1), is('c')); assertThat(reader.getCursor(), is(1)); } @Test public void read() throws Exception { final StringReader reader = new StringReader("abc"); assertThat(reader.read(), is('a')); assertThat(reader.read(), is('b')); assertThat(reader.read(), is('c')); assertThat(reader.getCursor(), is(3)); } @Test public void skip() throws Exception { final StringReader reader = new StringReader("abc"); reader.skip(); assertThat(reader.getCursor(), is(1)); } @Test public void getRemaining() throws Exception { final StringReader reader = new StringReader("Hello!"); assertThat(reader.getRemaining(), equalTo("Hello!")); reader.setCursor(3); assertThat(reader.getRemaining(), equalTo("lo!")); reader.setCursor(6); assertThat(reader.getRemaining(), equalTo("")); } @Test public void getRead() throws Exception { final StringReader reader = new StringReader("Hello!"); assertThat(reader.getRead(), equalTo("")); reader.setCursor(3); assertThat(reader.getRead(), equalTo("Hel")); reader.setCursor(6); assertThat(reader.getRead(), equalTo("Hello!")); } @Test public void skipWhitespace_none() throws Exception { final StringReader reader = new StringReader("Hello!"); reader.skipWhitespace(); assertThat(reader.getCursor(), is(0)); } @Test public void skipWhitespace_mixed() throws Exception { final StringReader reader = new StringReader(" \t \t\nHello!"); reader.skipWhitespace(); assertThat(reader.getCursor(), is(5)); } @Test public void skipWhitespace_empty() throws Exception { final StringReader reader = new StringReader(""); reader.skipWhitespace(); assertThat(reader.getCursor(), is(0)); } @Test public void readUnquotedString() throws Exception { final StringReader reader = new StringReader("hello world"); assertThat(reader.readUnquotedString(), equalTo("hello")); assertThat(reader.getRead(), equalTo("hello")); assertThat(reader.getRemaining(), equalTo(" world")); } @Test public void readUnquotedString_empty() throws Exception { final StringReader reader = new StringReader(""); assertThat(reader.readUnquotedString(), equalTo("")); assertThat(reader.getRead(), equalTo("")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readUnquotedString_empty_withRemaining() throws Exception { final StringReader reader = new StringReader(" hello world"); assertThat(reader.readUnquotedString(), equalTo("")); assertThat(reader.getRead(), equalTo("")); assertThat(reader.getRemaining(), equalTo(" hello world")); } @Test public void readQuotedString() throws Exception { final StringReader reader = new StringReader("\"hello world\""); assertThat(reader.readQuotedString(), equalTo("hello world")); assertThat(reader.getRead(), equalTo("\"hello world\"")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readQuotedString_empty() throws Exception { final StringReader reader = new StringReader(""); assertThat(reader.readQuotedString(), equalTo("")); assertThat(reader.getRead(), equalTo("")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readQuotedString_emptyQuoted() throws Exception { final StringReader reader = new StringReader("\"\""); assertThat(reader.readQuotedString(), equalTo("")); assertThat(reader.getRead(), equalTo("\"\"")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readQuotedString_emptyQuoted_withRemaining() throws Exception { final StringReader reader = new StringReader("\"\" hello world"); assertThat(reader.readQuotedString(), equalTo("")); assertThat(reader.getRead(), equalTo("\"\"")); assertThat(reader.getRemaining(), equalTo(" hello world")); } @Test public void readQuotedString_withEscapedQuote() throws Exception { final StringReader reader = new StringReader("\"hello \\\"world\\\"\""); assertThat(reader.readQuotedString(), equalTo("hello \"world\"")); assertThat(reader.getRead(), equalTo("\"hello \\\"world\\\"\"")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readQuotedString_withEscapedEscapes() throws Exception { final StringReader reader = new StringReader("\"\\\\o/\""); assertThat(reader.readQuotedString(), equalTo("\\o/")); assertThat(reader.getRead(), equalTo("\"\\\\o/\"")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readQuotedString_withRemaining() throws Exception { final StringReader reader = new StringReader("\"hello world\" foo bar"); assertThat(reader.readQuotedString(), equalTo("hello world")); assertThat(reader.getRead(), equalTo("\"hello world\"")); assertThat(reader.getRemaining(), equalTo(" foo bar")); } @Test public void readQuotedString_withImmediateRemaining() throws Exception { final StringReader reader = new StringReader("\"hello world\"foo bar"); assertThat(reader.readQuotedString(), equalTo("hello world")); assertThat(reader.getRead(), equalTo("\"hello world\"")); assertThat(reader.getRemaining(), equalTo("foo bar")); } @Test public void readQuotedString_noOpen() throws Exception { try { new StringReader("hello world\"").readQuotedString(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedStartOfQuote())); assertThat(ex.getCursor(), is(0)); } } @Test public void readQuotedString_noClose() throws Exception { try { new StringReader("\"hello world").readQuotedString(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedEndOfQuote())); assertThat(ex.getCursor(), is(12)); } } @Test public void readQuotedString_invalidEscape() throws Exception { try { new StringReader("\"hello\\nworld\"").readQuotedString(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerInvalidEscape())); assertThat(ex.getCursor(), is(7)); } } @Test public void readInt() throws Exception { final StringReader reader = new StringReader("1234567890"); assertThat(reader.readInt(), is(1234567890)); assertThat(reader.getRead(), equalTo("1234567890")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readInt_negative() throws Exception { final StringReader reader = new StringReader("-1234567890"); assertThat(reader.readInt(), is(-1234567890)); assertThat(reader.getRead(), equalTo("-1234567890")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readInt_invalid() throws Exception { try { new StringReader("12.34").readInt(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerInvalidInt())); assertThat(ex.getCursor(), is(0)); } } @Test public void readInt_none() throws Exception { try { new StringReader("").readInt(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedInt())); assertThat(ex.getCursor(), is(0)); } } @Test public void readInt_withRemaining() throws Exception { final StringReader reader = new StringReader("1234567890 foo bar"); assertThat(reader.readInt(), is(1234567890)); assertThat(reader.getRead(), equalTo("1234567890")); assertThat(reader.getRemaining(), equalTo(" foo bar")); } @Test public void readInt_withRemainingImmediate() throws Exception { final StringReader reader = new StringReader("1234567890foo bar"); assertThat(reader.readInt(), is(1234567890)); assertThat(reader.getRead(), equalTo("1234567890")); assertThat(reader.getRemaining(), equalTo("foo bar")); } @Test public void readLong() throws Exception { final StringReader reader = new StringReader("1234567890"); assertThat(reader.readLong(), is(1234567890L)); assertThat(reader.getRead(), equalTo("1234567890")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readLong_negative() throws Exception { final StringReader reader = new StringReader("-1234567890"); assertThat(reader.readLong(), is(-1234567890L)); assertThat(reader.getRead(), equalTo("-1234567890")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readLong_invalid() throws Exception { try { new StringReader("12.34").readLong(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerInvalidLong())); assertThat(ex.getCursor(), is(0)); } } @Test public void readLong_none() throws Exception { try { new StringReader("").readLong(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedLong())); assertThat(ex.getCursor(), is(0)); } } @Test public void readLong_withRemaining() throws Exception { final StringReader reader = new StringReader("1234567890 foo bar"); assertThat(reader.readLong(), is(1234567890L)); assertThat(reader.getRead(), equalTo("1234567890")); assertThat(reader.getRemaining(), equalTo(" foo bar")); } @Test public void readLong_withRemainingImmediate() throws Exception { final StringReader reader = new StringReader("1234567890foo bar"); assertThat(reader.readLong(), is(1234567890L)); assertThat(reader.getRead(), equalTo("1234567890")); assertThat(reader.getRemaining(), equalTo("foo bar")); } @Test public void readDouble() throws Exception { final StringReader reader = new StringReader("123"); assertThat(reader.readDouble(), is(123.0)); assertThat(reader.getRead(), equalTo("123")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readDouble_withDecimal() throws Exception { final StringReader reader = new StringReader("12.34"); assertThat(reader.readDouble(), is(12.34)); assertThat(reader.getRead(), equalTo("12.34")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readDouble_negative() throws Exception { final StringReader reader = new StringReader("-123"); assertThat(reader.readDouble(), is(-123.0)); assertThat(reader.getRead(), equalTo("-123")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readDouble_invalid() throws Exception { try { new StringReader("12.34.56").readDouble(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerInvalidDouble())); assertThat(ex.getCursor(), is(0)); } } @Test public void readDouble_none() throws Exception { try { new StringReader("").readDouble(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedDouble())); assertThat(ex.getCursor(), is(0)); } } @Test public void readDouble_withRemaining() throws Exception { final StringReader reader = new StringReader("12.34 foo bar"); assertThat(reader.readDouble(), is(12.34)); assertThat(reader.getRead(), equalTo("12.34")); assertThat(reader.getRemaining(), equalTo(" foo bar")); } @Test public void readDouble_withRemainingImmediate() throws Exception { final StringReader reader = new StringReader("12.34foo bar"); assertThat(reader.readDouble(), is(12.34)); assertThat(reader.getRead(), equalTo("12.34")); assertThat(reader.getRemaining(), equalTo("foo bar")); } @Test public void readFloat() throws Exception { final StringReader reader = new StringReader("123"); assertThat(reader.readFloat(), is(123.0f)); assertThat(reader.getRead(), equalTo("123")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readFloat_withDecimal() throws Exception { final StringReader reader = new StringReader("12.34"); assertThat(reader.readFloat(), is(12.34f)); assertThat(reader.getRead(), equalTo("12.34")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readFloat_negative() throws Exception { final StringReader reader = new StringReader("-123"); assertThat(reader.readFloat(), is(-123.0f)); assertThat(reader.getRead(), equalTo("-123")); assertThat(reader.getRemaining(), equalTo("")); } @Test public void readFloat_invalid() throws Exception { try { new StringReader("12.34.56").readFloat(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerInvalidFloat())); assertThat(ex.getCursor(), is(0)); } } @Test public void readFloat_none() throws Exception { try { new StringReader("").readFloat(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedFloat())); assertThat(ex.getCursor(), is(0)); } } @Test public void readFloat_withRemaining() throws Exception { final StringReader reader = new StringReader("12.34 foo bar"); assertThat(reader.readFloat(), is(12.34f)); assertThat(reader.getRead(), equalTo("12.34")); assertThat(reader.getRemaining(), equalTo(" foo bar")); } @Test public void readFloat_withRemainingImmediate() throws Exception { final StringReader reader = new StringReader("12.34foo bar"); assertThat(reader.readFloat(), is(12.34f)); assertThat(reader.getRead(), equalTo("12.34")); assertThat(reader.getRemaining(), equalTo("foo bar")); } @Test public void expect_correct() throws Exception { final StringReader reader = new StringReader("abc"); reader.expect('a'); assertThat(reader.getCursor(), is(1)); } @Test public void expect_incorrect() throws Exception { final StringReader reader = new StringReader("bcd"); try { reader.expect('a'); fail(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedSymbol())); assertThat(ex.getCursor(), is(0)); } } @Test public void expect_none() throws Exception { final StringReader reader = new StringReader(""); try { reader.expect('a'); fail(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedSymbol())); assertThat(ex.getCursor(), is(0)); } } @Test public void readBoolean_correct() throws Exception { final StringReader reader = new StringReader("true"); assertThat(reader.readBoolean(), is(true)); assertThat(reader.getRead(), equalTo("true")); } @Test public void readBoolean_incorrect() throws Exception { final StringReader reader = new StringReader("tuesday"); try { reader.readBoolean(); fail(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerInvalidBool())); assertThat(ex.getCursor(), is(0)); } } @Test public void readBoolean_none() throws Exception { final StringReader reader = new StringReader(""); try { reader.readBoolean(); fail(); } catch (final CommandSyntaxException ex) { assertThat(ex.getType(), is(CommandSyntaxException.BUILT_IN_EXCEPTIONS.readerExpectedBool())); assertThat(ex.getCursor(), is(0)); } } } |
Le jeu génère une liste de suggestions pour chaque commande (ci-dessus, un exemple avec /give)
DataFixerUpper est la deuxième bibliothèque que Mojang a décidé d’ouvrir et l’une des parties les plus importantes du moteur du jeu. De façon brossée, il s’agit d’une bibliothèque de conversion des données (dont le jeu fait usage) au format requis pour que l’apparence des différents niveaux reste en phase avec les modifications introduites par l’équipe de développement. « Pour faire simple, avant que Minecraft ne charge les différents blocs, il fait appel à DataFixerUpper qui assure la mise à jour visuelle », explique l’équipe de développement.
| Code java : | Sélectionner tout |
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 | // Copyright (c) Microsoft Corporation. All rights reserved. // Licensed under the MIT license. package com.mojang.datafixers; import com.google.common.collect.ImmutableList; import com.google.common.collect.Lists; import it.unimi.dsi.fastutil.ints.Int2ObjectSortedMap; import it.unimi.dsi.fastutil.ints.IntSortedSet; import it.unimi.dsi.fastutil.longs.Long2ObjectMap; import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; import com.mojang.datafixers.functions.PointFreeRule; import com.mojang.datafixers.schemas.Schema; import com.mojang.datafixers.types.Type; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; import java.util.List; import java.util.Optional; /* * Optimizing functions * Cunha, A., & Pinto, J. S. (2005). Point-free program transformation * Lämmel, R., Visser, E., & Visser, J. (2002). The essence of strategic programming * * How to handle recursive types * Cunha, A., & Pacheco, H. (2011). Algebraic specialization of generic functions for recursive types * Yakushev, A. R., Holdermans, S., Löh, A., & Jeuring, J. (2009, August). Generic programming with fixed points for mutually recursive datatypes * Magalhães, J. P., & Löh, A. (2012). A formal comparison of approaches to datatype-generic programming * * Optics * Pickering, M., Gibbons, J., & Wu, N. (2017). Profunctor Optics: Modular Data Accessors * Pacheco, H., & Cunha, A. (2010, June). Generic point-free lenses * * Tying it together * Cunha, A., Oliveira, J. N., & Visser, J. (2006, August). Type-safe two-level data transformation * Cunha, A., & Visser, J. (2011). Transformation of structure-shy programs with application to XPath queries and strategic functions * Pacheco, H., & Cunha, A. (2011, January). Calculating with lenses: optimising bidirectional transformations */ public class DataFixerUpper implements DataFixer { public static boolean ERRORS_ARE_FATAL = false; private static final Logger LOGGER = LogManager.getLogger(); protected static final PointFreeRule OPTIMIZATION_RULE = DataFixUtils.make(() -> { final PointFreeRule opSimple = PointFreeRule.orElse( PointFreeRule.orElse( PointFreeRule.CataFuseSame.INSTANCE, PointFreeRule.orElse( PointFreeRule.CataFuseDifferent.INSTANCE, PointFreeRule.LensAppId.INSTANCE ) ), PointFreeRule.orElse( PointFreeRule.LensComp.INSTANCE, PointFreeRule.orElse( PointFreeRule.AppNest.INSTANCE, PointFreeRule.LensCompFunc.INSTANCE ) ) ); final PointFreeRule opLeft = PointFreeRule.many(PointFreeRule.once(PointFreeRule.orElse(opSimple, PointFreeRule.CompAssocLeft.INSTANCE))); final PointFreeRule opComp = PointFreeRule.many(PointFreeRule.once(PointFreeRule.orElse(PointFreeRule.SortInj.INSTANCE, PointFreeRule.SortProj.INSTANCE))); final PointFreeRule opRight = PointFreeRule.many(PointFreeRule.once(PointFreeRule.orElse(opSimple, PointFreeRule.CompAssocRight.INSTANCE))); return PointFreeRule.seq(ImmutableList.of(() -> opLeft, () -> opComp, () -> opRight, () -> opLeft, () -> opRight)); }); private final Int2ObjectSortedMap<Schema> schemas; private final List<DataFix> globalList; private final IntSortedSet fixerVersions; private final Long2ObjectMap<TypeRewriteRule> rules = new Long2ObjectOpenHashMap<>(); protected DataFixerUpper(final Int2ObjectSortedMap<Schema> schemas, final List<DataFix> globalList, final IntSortedSet fixerVersions) { this.schemas = schemas; this.globalList = globalList; this.fixerVersions = fixerVersions; } @Override public <T> Dynamic<T> update(final DSL.TypeReference type, final Dynamic<T> input, final int version, final int newVersion) { try { if (version < newVersion) { final Type<?> dataType = getType(type, version); final Optional<T> read = dataType.readAndWrite(input.getOps(), getType(type, newVersion), getRule(version, newVersion), OPTIMIZATION_RULE, input.getValue()); if (!read.isPresent()) { throw new IllegalStateException("Could not parse for fixing " + dataType); } return new Dynamic<>(input.getOps(), read.get()); } } catch (final Throwable t) { LOGGER.error("Something went wrong upgrading!", t); } return input; } @Override public Schema getSchema(final int key) { return schemas.get(getLowestSchemaSameVersion(schemas, key)); } protected Type<?> getType(final DSL.TypeReference type, final int version) { return getSchema(DataFixUtils.makeKey(version)).getType(type); } protected static int getLowestSchemaSameVersion(final Int2ObjectSortedMap<Schema> schemas, final int versionKey) { if (versionKey < schemas.firstIntKey()) { // can't have a data type before anything else return schemas.firstIntKey(); } return schemas.subMap(0, versionKey + 1).lastIntKey(); } private int getLowestFixSameVersion(final int versionKey) { if (versionKey < fixerVersions.firstInt()) { // can have a version before everything else return fixerVersions.firstInt() - 1; } return fixerVersions.subSet(0, versionKey + 1).lastInt(); } protected TypeRewriteRule getRule(final int version, final int dataVersion) { if (version >= dataVersion) { return TypeRewriteRule.nop(); } final int expandedVersion = getLowestFixSameVersion(DataFixUtils.makeKey(version)); final int expandedDataVersion = DataFixUtils.makeKey(dataVersion); final long key = (long) expandedVersion << 32 | expandedDataVersion; if (!rules.containsKey(key)) { final List<TypeRewriteRule> rules = Lists.newArrayList(); for (final DataFix fix : globalList) { final int fixVersion = fix.getVersionKey(); if (fixVersion > expandedVersion && fixVersion <= expandedDataVersion) { final TypeRewriteRule fixRule = fix.getRule(); if (fixRule == TypeRewriteRule.nop()) { continue; } rules.add(fixRule); } } this.rules.put(key, TypeRewriteRule.seq(rules)); } return rules.get(key); } protected IntSortedSet fixerVersions() { return fixerVersions; } } |
L’intérêt pour un développeur tiers est de pouvoir s’inspirer d’un travail de ce type pour le réutiliser dans des projets qui n’ont rien à voir avec le gaming. C’est en cela que l’open source est magique. De façon officielle, le jeu était jusqu’ici distribué sous licence propriétaire. La donne a changé et ce n’est qu’un début puisque l’équipe Mojang promet d’ouvrir d’autres pans du code source.
Source : Minecraft.net
Et vous ?
Que pensez-vous de cette initiative du studio de développement Mojang ? Qu’avez-vous déniché de bon dans les packages mis à votre disposition ? Comment comptez-vous le réutiliser ?Voir aussi :
Microsoft confirme le rachat de Minecraft pour 2,5 milliards de dollars Microsoft utilise le jeu Minecraft comme espace d'apprentissage pour son logiciel d'intelligence artificielle qui sera disponible cet été Microsoft mise sur C++ plutôt que Java pour écrire la nouvelle version de Minecraft Education Edition, gage de plus de rapidité ?