1 /* 2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.tools.javac.code; 27 28 import java.util.HashMap; 29 import java.util.Map; 30 31 import javax.lang.model.element.ElementVisitor; 32 import javax.tools.JavaFileObject; 33 34 35 import com.sun.tools.javac.code.Scope.WriteableScope; 36 import com.sun.tools.javac.code.Symbol.ClassSymbol; 37 import com.sun.tools.javac.code.Symbol.Completer; 38 import com.sun.tools.javac.code.Symbol.CompletionFailure; 39 import com.sun.tools.javac.code.Symbol.MethodSymbol; 40 import com.sun.tools.javac.code.Symbol.PackageSymbol; 41 import com.sun.tools.javac.code.Symbol.TypeSymbol; 42 import com.sun.tools.javac.code.Symbol.VarSymbol; 43 import com.sun.tools.javac.code.Type.BottomType; 44 import com.sun.tools.javac.code.Type.ClassType; 45 import com.sun.tools.javac.code.Type.ErrorType; 46 import com.sun.tools.javac.code.Type.JCPrimitiveType; 47 import com.sun.tools.javac.code.Type.JCVoidType; 48 import com.sun.tools.javac.code.Type.MethodType; 49 import com.sun.tools.javac.code.Type.UnknownType; 50 import com.sun.tools.javac.jvm.Target; 51 import com.sun.tools.javac.util.Assert; 52 import com.sun.tools.javac.util.Context; 53 import com.sun.tools.javac.util.Convert; 54 import com.sun.tools.javac.util.DefinedBy; 55 import com.sun.tools.javac.util.DefinedBy.Api; 56 import com.sun.tools.javac.util.JavacMessages; 57 import com.sun.tools.javac.util.List; 58 import com.sun.tools.javac.util.Log; 59 import com.sun.tools.javac.util.Name; 60 import com.sun.tools.javac.util.Names; 61 62 import static com.sun.tools.javac.code.Flags.*; 63 import static com.sun.tools.javac.code.Kinds.Kind.*; 64 import static com.sun.tools.javac.code.TypeTag.*; 65 66 /** A class that defines all predefined constants and operators 67 * as well as special classes such as java.lang.Object, which need 68 * to be known to the compiler. All symbols are held in instance 69 * fields. This makes it possible to work in multiple concurrent 70 * projects, which might use different class files for library classes. 71 * 72 * <p><b>This is NOT part of any supported API. 73 * If you write code that depends on this, you do so at your own risk. 74 * This code and its internal interfaces are subject to change or 75 * deletion without notice.</b> 76 */ 77 public class Symtab { 78 /** The context key for the symbol table. */ 79 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>(); 80 81 /** Get the symbol table instance. */ 82 public static Symtab instance(Context context) { 83 Symtab instance = context.get(symtabKey); 84 if (instance == null) 85 instance = new Symtab(context); 86 return instance; 87 } 88 89 /** Builtin types. 90 */ 91 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null); 92 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null); 93 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null); 94 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null); 95 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null); 96 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null); 97 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null); 98 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null); 99 public final Type botType = new BottomType(); 100 public final JCVoidType voidType = new JCVoidType(); 101 102 private final Names names; 103 private final Completer initialCompleter; 104 private final Target target; 105 106 /** A symbol for the root package. 107 */ 108 public final PackageSymbol rootPackage; 109 110 /** A symbol for the unnamed package. 111 */ 112 public final PackageSymbol unnamedPackage; 113 114 /** A symbol that stands for a missing symbol. 115 */ 116 public final TypeSymbol noSymbol; 117 118 /** The error symbol. 119 */ 120 public final ClassSymbol errSymbol; 121 122 /** The unknown symbol. 123 */ 124 public final ClassSymbol unknownSymbol; 125 126 /** A value for the errType, with a originalType of noType */ 127 public final Type errType; 128 129 /** A value for the unknown type. */ 130 public final Type unknownType; 131 132 /** The builtin type of all arrays. */ 133 public final ClassSymbol arrayClass; 134 public final MethodSymbol arrayCloneMethod; 135 136 /** VGJ: The (singleton) type of all bound types. */ 137 public final ClassSymbol boundClass; 138 139 /** The builtin type of all methods. */ 140 public final ClassSymbol methodClass; 141 142 /** Predefined types. 143 */ 144 public final Type objectType; 145 public final Type objectsType; 146 public final Type voidClassType; 147 public final Type classType; 148 public final Type classLoaderType; 149 public final Type stringType; 150 public final Type stringBufferType; 151 public final Type stringBuilderType; 152 public final Type cloneableType; 153 public final Type serializableType; 154 public final Type serializedLambdaType; 155 public final Type methodHandleType; 156 public final Type methodHandleLookupType; 157 public final Type methodTypeType; 158 public final Type nativeHeaderType; 159 public final Type throwableType; 160 public final Type errorType; 161 public final Type interruptedExceptionType; 162 public final Type illegalArgumentExceptionType; 163 public final Type exceptionType; 164 public final Type runtimeExceptionType; 165 public final Type classNotFoundExceptionType; 166 public final Type noClassDefFoundErrorType; 167 public final Type noSuchFieldErrorType; 168 public final Type assertionErrorType; 169 public final Type cloneNotSupportedExceptionType; 170 public final Type annotationType; 171 public final TypeSymbol enumSym; 172 public final Type listType; 173 public final Type collectionsType; 174 public final Type comparableType; 175 public final Type comparatorType; 176 public final Type arraysType; 177 public final Type iterableType; 178 public final Type iteratorType; 179 public final Type annotationTargetType; 180 public final Type overrideType; 181 public final Type retentionType; 182 public final Type deprecatedType; 183 public final Type suppressWarningsType; 184 public final Type supplierType; 185 public final Type inheritedType; 186 public final Type profileType; 187 public final Type proprietaryType; 188 public final Type systemType; 189 public final Type autoCloseableType; 190 public final Type trustMeType; 191 public final Type lambdaMetafactory; 192 public final Type stringConcatFactory; 193 public final Type repeatableType; 194 public final Type documentedType; 195 public final Type elementTypeType; 196 public final Type functionalInterfaceType; 197 198 /** The symbol representing the length field of an array. 199 */ 200 public final VarSymbol lengthVar; 201 202 /** The symbol representing the final finalize method on enums */ 203 public final MethodSymbol enumFinalFinalize; 204 205 /** The symbol representing the close method on TWR AutoCloseable type */ 206 public final MethodSymbol autoCloseableClose; 207 208 /** The predefined type that belongs to a tag. 209 */ 210 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()]; 211 212 /** The name of the class that belongs to a basix type tag. 213 */ 214 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()]; 215 216 /** A hashtable containing the encountered top-level and member classes, 217 * indexed by flat names. The table does not contain local classes. 218 * It should be updated from the outside to reflect classes defined 219 * by compiled source files. 220 */ 221 public final Map<Name, ClassSymbol> classes = new HashMap<>(); 222 223 /** A hashtable containing the encountered packages. 224 * the table should be updated from outside to reflect packages defined 225 * by compiled source files. 226 */ 227 public final Map<Name, PackageSymbol> packages = new HashMap<>(); 228 229 public void initType(Type type, ClassSymbol c) { 230 type.tsym = c; 231 typeOfTag[type.getTag().ordinal()] = type; 232 } 233 234 public void initType(Type type, String name) { 235 initType( 236 type, 237 new ClassSymbol( 238 PUBLIC, names.fromString(name), type, rootPackage)); 239 } 240 241 public void initType(Type type, String name, String bname) { 242 initType(type, name); 243 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname); 244 } 245 246 /** The class symbol that owns all predefined symbols. 247 */ 248 public final ClassSymbol predefClass; 249 250 /** Enter a class into symbol table. 251 * @param s The name of the class. 252 */ 253 private Type enterClass(String s) { 254 return enterClass(names.fromString(s)).type; 255 } 256 257 public void synthesizeEmptyInterfaceIfMissing(final Type type) { 258 final Completer completer = type.tsym.completer; 259 type.tsym.completer = new Completer() { 260 public void complete(Symbol sym) throws CompletionFailure { 261 try { 262 completer.complete(sym); 263 } catch (CompletionFailure e) { 264 sym.flags_field |= (PUBLIC | INTERFACE); 265 ((ClassType) sym.type).supertype_field = objectType; 266 } 267 } 268 269 @Override 270 public boolean isTerminal() { 271 return completer.isTerminal(); 272 } 273 }; 274 } 275 276 public void synthesizeBoxTypeIfMissing(final Type type) { 277 ClassSymbol sym = enterClass(boxedName[type.getTag().ordinal()]); 278 final Completer completer = sym.completer; 279 sym.completer = new Completer() { 280 public void complete(Symbol sym) throws CompletionFailure { 281 try { 282 completer.complete(sym); 283 } catch (CompletionFailure e) { 284 sym.flags_field |= PUBLIC; 285 ((ClassType) sym.type).supertype_field = objectType; 286 MethodSymbol boxMethod = 287 new MethodSymbol(PUBLIC | STATIC, names.valueOf, 288 new MethodType(List.of(type), sym.type, 289 List.<Type>nil(), methodClass), 290 sym); 291 sym.members().enter(boxMethod); 292 MethodSymbol unboxMethod = 293 new MethodSymbol(PUBLIC, 294 type.tsym.name.append(names.Value), // x.intValue() 295 new MethodType(List.<Type>nil(), type, 296 List.<Type>nil(), methodClass), 297 sym); 298 sym.members().enter(unboxMethod); 299 } 300 } 301 302 @Override 303 public boolean isTerminal() { 304 return completer.isTerminal(); 305 } 306 }; 307 } 308 309 // Enter a synthetic class that is used to mark classes in ct.sym. 310 // This class does not have a class file. 311 private Type enterSyntheticAnnotation(String name) { 312 ClassType type = (ClassType)enterClass(name); 313 ClassSymbol sym = (ClassSymbol)type.tsym; 314 sym.completer = Completer.NULL_COMPLETER; 315 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE; 316 sym.erasure_field = type; 317 sym.members_field = WriteableScope.create(sym); 318 type.typarams_field = List.nil(); 319 type.allparams_field = List.nil(); 320 type.supertype_field = annotationType; 321 type.interfaces_field = List.nil(); 322 return type; 323 } 324 325 /** Constructor; enters all predefined identifiers and operators 326 * into symbol table. 327 */ 328 protected Symtab(Context context) throws CompletionFailure { 329 context.put(symtabKey, this); 330 331 names = Names.instance(context); 332 target = Target.instance(context); 333 334 // Create the unknown type 335 unknownType = new UnknownType(); 336 337 // create the basic builtin symbols 338 rootPackage = new PackageSymbol(names.empty, null); 339 packages.put(names.empty, rootPackage); 340 final JavacMessages messages = JavacMessages.instance(context); 341 unnamedPackage = new PackageSymbol(names.empty, rootPackage) { 342 public String toString() { 343 return messages.getLocalizedString("compiler.misc.unnamed.package"); 344 } 345 }; 346 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) { 347 @DefinedBy(Api.LANGUAGE_MODEL) 348 public <R, P> R accept(ElementVisitor<R, P> v, P p) { 349 return v.visitUnknown(this, p); 350 } 351 }; 352 353 // create the error symbols 354 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage); 355 errType = new ErrorType(errSymbol, Type.noType); 356 357 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage); 358 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol); 359 unknownSymbol.type = unknownType; 360 361 // initialize builtin types 362 initType(byteType, "byte", "Byte"); 363 initType(shortType, "short", "Short"); 364 initType(charType, "char", "Character"); 365 initType(intType, "int", "Integer"); 366 initType(longType, "long", "Long"); 367 initType(floatType, "float", "Float"); 368 initType(doubleType, "double", "Double"); 369 initType(booleanType, "boolean", "Boolean"); 370 initType(voidType, "void", "Void"); 371 initType(botType, "<nulltype>"); 372 initType(errType, errSymbol); 373 initType(unknownType, unknownSymbol); 374 375 // the builtin class of all arrays 376 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol); 377 378 // VGJ 379 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol); 380 boundClass.members_field = new Scope.ErrorScope(boundClass); 381 382 // the builtin class of all methods 383 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol); 384 methodClass.members_field = new Scope.ErrorScope(boundClass); 385 386 // Create class to hold all predefined constants and operations. 387 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage); 388 WriteableScope scope = WriteableScope.create(predefClass); 389 predefClass.members_field = scope; 390 391 // Get the initial completer for Symbols from the ClassFinder 392 initialCompleter = ClassFinder.instance(context).getCompleter(); 393 rootPackage.completer = initialCompleter; 394 unnamedPackage.completer = initialCompleter; 395 396 // Enter symbols for basic types. 397 scope.enter(byteType.tsym); 398 scope.enter(shortType.tsym); 399 scope.enter(charType.tsym); 400 scope.enter(intType.tsym); 401 scope.enter(longType.tsym); 402 scope.enter(floatType.tsym); 403 scope.enter(doubleType.tsym); 404 scope.enter(booleanType.tsym); 405 scope.enter(errType.tsym); 406 407 // Enter symbol for the errSymbol 408 scope.enter(errSymbol); 409 410 classes.put(predefClass.fullname, predefClass); 411 412 // Enter predefined classes. 413 objectType = enterClass("java.lang.Object"); 414 objectsType = enterClass("java.util.Objects"); 415 classType = enterClass("java.lang.Class"); 416 voidClassType = enterClass("java.lang.Void"); 417 stringType = enterClass("java.lang.String"); 418 stringBufferType = enterClass("java.lang.StringBuffer"); 419 stringBuilderType = enterClass("java.lang.StringBuilder"); 420 cloneableType = enterClass("java.lang.Cloneable"); 421 throwableType = enterClass("java.lang.Throwable"); 422 serializableType = enterClass("java.io.Serializable"); 423 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda"); 424 methodHandleType = enterClass("java.lang.invoke.MethodHandle"); 425 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup"); 426 methodTypeType = enterClass("java.lang.invoke.MethodType"); 427 errorType = enterClass("java.lang.Error"); 428 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException"); 429 interruptedExceptionType = enterClass("java.lang.InterruptedException"); 430 exceptionType = enterClass("java.lang.Exception"); 431 runtimeExceptionType = enterClass("java.lang.RuntimeException"); 432 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException"); 433 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError"); 434 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError"); 435 assertionErrorType = enterClass("java.lang.AssertionError"); 436 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException"); 437 annotationType = enterClass("java.lang.annotation.Annotation"); 438 classLoaderType = enterClass("java.lang.ClassLoader"); 439 enumSym = enterClass(names.java_lang_Enum); 440 enumFinalFinalize = 441 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL, 442 names.finalize, 443 new MethodType(List.<Type>nil(), voidType, 444 List.<Type>nil(), methodClass), 445 enumSym); 446 listType = enterClass("java.util.List"); 447 collectionsType = enterClass("java.util.Collections"); 448 comparableType = enterClass("java.lang.Comparable"); 449 comparatorType = enterClass("java.util.Comparator"); 450 arraysType = enterClass("java.util.Arrays"); 451 iterableType = enterClass("java.lang.Iterable"); 452 iteratorType = enterClass("java.util.Iterator"); 453 annotationTargetType = enterClass("java.lang.annotation.Target"); 454 overrideType = enterClass("java.lang.Override"); 455 retentionType = enterClass("java.lang.annotation.Retention"); 456 deprecatedType = enterClass("java.lang.Deprecated"); 457 suppressWarningsType = enterClass("java.lang.SuppressWarnings"); 458 supplierType = enterClass("java.util.function.Supplier"); 459 inheritedType = enterClass("java.lang.annotation.Inherited"); 460 repeatableType = enterClass("java.lang.annotation.Repeatable"); 461 documentedType = enterClass("java.lang.annotation.Documented"); 462 elementTypeType = enterClass("java.lang.annotation.ElementType"); 463 systemType = enterClass("java.lang.System"); 464 autoCloseableType = enterClass("java.lang.AutoCloseable"); 465 autoCloseableClose = new MethodSymbol(PUBLIC, 466 names.close, 467 new MethodType(List.<Type>nil(), voidType, 468 List.of(exceptionType), methodClass), 469 autoCloseableType.tsym); 470 trustMeType = enterClass("java.lang.SafeVarargs"); 471 nativeHeaderType = enterClass("java.lang.annotation.Native"); 472 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory"); 473 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory"); 474 functionalInterfaceType = enterClass("java.lang.FunctionalInterface"); 475 476 synthesizeEmptyInterfaceIfMissing(autoCloseableType); 477 synthesizeEmptyInterfaceIfMissing(cloneableType); 478 synthesizeEmptyInterfaceIfMissing(serializableType); 479 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory); 480 synthesizeEmptyInterfaceIfMissing(serializedLambdaType); 481 synthesizeEmptyInterfaceIfMissing(stringConcatFactory); 482 synthesizeBoxTypeIfMissing(doubleType); 483 synthesizeBoxTypeIfMissing(floatType); 484 synthesizeBoxTypeIfMissing(voidType); 485 486 // Enter a synthetic class that is used to mark internal 487 // proprietary classes in ct.sym. This class does not have a 488 // class file. 489 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation"); 490 491 // Enter a synthetic class that is used to provide profile info for 492 // classes in ct.sym. This class does not have a class file. 493 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation"); 494 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym); 495 profileType.tsym.members().enter(m); 496 497 // Enter a class for arrays. 498 // The class implements java.lang.Cloneable and java.io.Serializable. 499 // It has a final length field and a clone method. 500 ClassType arrayClassType = (ClassType)arrayClass.type; 501 arrayClassType.supertype_field = objectType; 502 arrayClassType.interfaces_field = List.of(cloneableType, serializableType); 503 arrayClass.members_field = WriteableScope.create(arrayClass); 504 lengthVar = new VarSymbol( 505 PUBLIC | FINAL, 506 names.length, 507 intType, 508 arrayClass); 509 arrayClass.members().enter(lengthVar); 510 arrayCloneMethod = new MethodSymbol( 511 PUBLIC, 512 names.clone, 513 new MethodType(List.<Type>nil(), objectType, 514 List.<Type>nil(), methodClass), 515 arrayClass); 516 arrayClass.members().enter(arrayCloneMethod); 517 } 518 519 /** Define a new class given its name and owner. 520 */ 521 public ClassSymbol defineClass(Name name, Symbol owner) { 522 ClassSymbol c = new ClassSymbol(0, name, owner); 523 if (owner.kind == PCK) 524 Assert.checkNull(classes.get(c.flatname), c); 525 c.completer = initialCompleter; 526 return c; 527 } 528 529 /** Create a new toplevel or member class symbol with given name 530 * and owner and enter in `classes' unless already there. 531 */ 532 public ClassSymbol enterClass(Name name, TypeSymbol owner) { 533 Name flatname = TypeSymbol.formFlatName(name, owner); 534 ClassSymbol c = classes.get(flatname); 535 if (c == null) { 536 c = defineClass(name, owner); 537 classes.put(flatname, c); 538 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) { 539 // reassign fields of classes that might have been loaded with 540 // their flat names. 541 c.owner.members().remove(c); 542 c.name = name; 543 c.owner = owner; 544 c.fullname = ClassSymbol.formFullName(name, owner); 545 } 546 return c; 547 } 548 549 /** 550 * Creates a new toplevel class symbol with given flat name and 551 * given class (or source) file. 552 * 553 * @param flatName a fully qualified binary class name 554 * @param classFile the class file or compilation unit defining 555 * the class (may be {@code null}) 556 * @return a newly created class symbol 557 * @throws AssertionError if the class symbol already exists 558 */ 559 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) { 560 ClassSymbol cs = classes.get(flatName); 561 if (cs != null) { 562 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s", 563 cs.fullname, 564 cs.completer, 565 cs.classfile, 566 cs.sourcefile); 567 throw new AssertionError(msg); 568 } 569 Name packageName = Convert.packagePart(flatName); 570 PackageSymbol owner = packageName.isEmpty() 571 ? unnamedPackage 572 : enterPackage(packageName); 573 cs = defineClass(Convert.shortName(flatName), owner); 574 cs.classfile = classFile; 575 classes.put(flatName, cs); 576 return cs; 577 } 578 579 /** Create a new member or toplevel class symbol with given flat name 580 * and enter in `classes' unless already there. 581 */ 582 public ClassSymbol enterClass(Name flatname) { 583 ClassSymbol c = classes.get(flatname); 584 if (c == null) 585 return enterClass(flatname, (JavaFileObject)null); 586 else 587 return c; 588 } 589 590 /** Check to see if a package exists, given its fully qualified name. 591 */ 592 public boolean packageExists(Name fullname) { 593 return enterPackage(fullname).exists(); 594 } 595 596 /** Make a package, given its fully qualified name. 597 */ 598 public PackageSymbol enterPackage(Name fullname) { 599 PackageSymbol p = packages.get(fullname); 600 if (p == null) { 601 Assert.check(!fullname.isEmpty(), "rootPackage missing!"); 602 p = new PackageSymbol( 603 Convert.shortName(fullname), 604 enterPackage(Convert.packagePart(fullname))); 605 p.completer = initialCompleter; 606 packages.put(fullname, p); 607 } 608 return p; 609 } 610 611 /** Make a package, given its unqualified name and enclosing package. 612 */ 613 public PackageSymbol enterPackage(Name name, PackageSymbol owner) { 614 return enterPackage(TypeSymbol.formFullName(name, owner)); 615 } 616 }