Thu, 09 Dec 2010 15:50:34 +0000
6476118: compiler bug causes runtime ClassCastException for generics overloading
Summary: compiler allows bridge methods to override unrelated method
Reviewed-by: jjg
duke@1 | 1 | /* |
sundar@697 | 2 | * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
duke@1 | 10 | * |
duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 15 | * accompanied this code). |
duke@1 | 16 | * |
duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.javac.code; |
duke@1 | 27 | |
duke@1 | 28 | import java.util.Set; |
duke@1 | 29 | import java.util.concurrent.Callable; |
duke@1 | 30 | import javax.lang.model.element.*; |
duke@1 | 31 | import javax.tools.JavaFileObject; |
duke@1 | 32 | |
duke@1 | 33 | import com.sun.tools.javac.util.*; |
duke@1 | 34 | import com.sun.tools.javac.util.Name; |
duke@1 | 35 | import com.sun.tools.javac.code.Type.*; |
duke@1 | 36 | import com.sun.tools.javac.comp.Attr; |
duke@1 | 37 | import com.sun.tools.javac.comp.AttrContext; |
duke@1 | 38 | import com.sun.tools.javac.comp.Env; |
duke@1 | 39 | import com.sun.tools.javac.jvm.*; |
duke@1 | 40 | import com.sun.tools.javac.model.*; |
duke@1 | 41 | import com.sun.tools.javac.tree.JCTree; |
duke@1 | 42 | |
duke@1 | 43 | import static com.sun.tools.javac.code.Flags.*; |
duke@1 | 44 | import static com.sun.tools.javac.code.Kinds.*; |
duke@1 | 45 | import static com.sun.tools.javac.code.TypeTags.*; |
duke@1 | 46 | |
duke@1 | 47 | /** Root class for Java symbols. It contains subclasses |
duke@1 | 48 | * for specific sorts of symbols, such as variables, methods and operators, |
duke@1 | 49 | * types, packages. Each subclass is represented as a static inner class |
duke@1 | 50 | * inside Symbol. |
duke@1 | 51 | * |
jjg@581 | 52 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 53 | * If you write code that depends on this, you do so at your own risk. |
duke@1 | 54 | * This code and its internal interfaces are subject to change or |
duke@1 | 55 | * deletion without notice.</b> |
duke@1 | 56 | */ |
duke@1 | 57 | public abstract class Symbol implements Element { |
duke@1 | 58 | // public Throwable debug = new Throwable(); |
duke@1 | 59 | |
duke@1 | 60 | /** The kind of this symbol. |
duke@1 | 61 | * @see Kinds |
duke@1 | 62 | */ |
duke@1 | 63 | public int kind; |
duke@1 | 64 | |
duke@1 | 65 | /** The flags of this symbol. |
duke@1 | 66 | */ |
duke@1 | 67 | public long flags_field; |
duke@1 | 68 | |
duke@1 | 69 | /** An accessor method for the flags of this symbol. |
duke@1 | 70 | * Flags of class symbols should be accessed through the accessor |
duke@1 | 71 | * method to make sure that the class symbol is loaded. |
duke@1 | 72 | */ |
duke@1 | 73 | public long flags() { return flags_field; } |
duke@1 | 74 | |
duke@1 | 75 | /** The attributes of this symbol. |
duke@1 | 76 | */ |
duke@1 | 77 | public List<Attribute.Compound> attributes_field; |
duke@1 | 78 | |
duke@1 | 79 | /** An accessor method for the attributes of this symbol. |
duke@1 | 80 | * Attributes of class symbols should be accessed through the accessor |
duke@1 | 81 | * method to make sure that the class symbol is loaded. |
duke@1 | 82 | */ |
duke@1 | 83 | public List<Attribute.Compound> getAnnotationMirrors() { |
duke@1 | 84 | assert attributes_field != null; |
duke@1 | 85 | return attributes_field; |
duke@1 | 86 | } |
duke@1 | 87 | |
duke@1 | 88 | /** Fetch a particular annotation from a symbol. */ |
duke@1 | 89 | public Attribute.Compound attribute(Symbol anno) { |
duke@1 | 90 | for (Attribute.Compound a : getAnnotationMirrors()) |
duke@1 | 91 | if (a.type.tsym == anno) return a; |
duke@1 | 92 | return null; |
duke@1 | 93 | } |
duke@1 | 94 | |
duke@1 | 95 | /** The name of this symbol in Utf8 representation. |
duke@1 | 96 | */ |
duke@1 | 97 | public Name name; |
duke@1 | 98 | |
duke@1 | 99 | /** The type of this symbol. |
duke@1 | 100 | */ |
duke@1 | 101 | public Type type; |
duke@1 | 102 | |
jjg@308 | 103 | /** The type annotations targeted to a tree directly owned by this symbol |
jjg@308 | 104 | */ |
jjg@308 | 105 | // type annotations are stored here for two purposes: |
jjg@308 | 106 | // - convenient location to store annotations for generation after erasure |
jjg@308 | 107 | // - a private interface for accessing type annotations parsed from |
jjg@308 | 108 | // classfiles |
jjg@308 | 109 | // the field is populated for the following declaration only |
jjg@308 | 110 | // class, field, variable and type parameters |
jjg@308 | 111 | // |
jjg@308 | 112 | public List<Attribute.TypeCompound> typeAnnotations; |
jjg@308 | 113 | |
duke@1 | 114 | /** The owner of this symbol. |
duke@1 | 115 | */ |
duke@1 | 116 | public Symbol owner; |
duke@1 | 117 | |
duke@1 | 118 | /** The completer of this symbol. |
duke@1 | 119 | */ |
duke@1 | 120 | public Completer completer; |
duke@1 | 121 | |
duke@1 | 122 | /** A cache for the type erasure of this symbol. |
duke@1 | 123 | */ |
duke@1 | 124 | public Type erasure_field; |
duke@1 | 125 | |
duke@1 | 126 | /** Construct a symbol with given kind, flags, name, type and owner. |
duke@1 | 127 | */ |
duke@1 | 128 | public Symbol(int kind, long flags, Name name, Type type, Symbol owner) { |
duke@1 | 129 | this.kind = kind; |
duke@1 | 130 | this.flags_field = flags; |
duke@1 | 131 | this.type = type; |
duke@1 | 132 | this.owner = owner; |
duke@1 | 133 | this.completer = null; |
duke@1 | 134 | this.erasure_field = null; |
duke@1 | 135 | this.attributes_field = List.nil(); |
jjg@308 | 136 | this.typeAnnotations = List.nil(); |
duke@1 | 137 | this.name = name; |
duke@1 | 138 | } |
duke@1 | 139 | |
duke@1 | 140 | /** Clone this symbol with new owner. |
duke@1 | 141 | * Legal only for fields and methods. |
duke@1 | 142 | */ |
duke@1 | 143 | public Symbol clone(Symbol newOwner) { |
duke@1 | 144 | throw new AssertionError(); |
duke@1 | 145 | } |
duke@1 | 146 | |
mcimadamore@121 | 147 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 148 | return v.visitSymbol(this, p); |
mcimadamore@121 | 149 | } |
mcimadamore@121 | 150 | |
duke@1 | 151 | /** The Java source which this symbol represents. |
duke@1 | 152 | * A description of this symbol; overrides Object. |
duke@1 | 153 | */ |
duke@1 | 154 | public String toString() { |
duke@1 | 155 | return name.toString(); |
duke@1 | 156 | } |
duke@1 | 157 | |
duke@1 | 158 | /** A Java source description of the location of this symbol; used for |
mcimadamore@80 | 159 | * error reporting. |
mcimadamore@80 | 160 | * |
mcimadamore@80 | 161 | * @return null if the symbol is a package or a toplevel class defined in |
mcimadamore@80 | 162 | * the default package; otherwise, the owner symbol is returned |
duke@1 | 163 | */ |
mcimadamore@80 | 164 | public Symbol location() { |
jjg@509 | 165 | if (owner.name == null || (owner.name.isEmpty() && owner.kind != PCK && owner.kind != TYP)) { |
mcimadamore@80 | 166 | return null; |
duke@1 | 167 | } |
mcimadamore@80 | 168 | return owner; |
duke@1 | 169 | } |
duke@1 | 170 | |
mcimadamore@80 | 171 | public Symbol location(Type site, Types types) { |
jjg@113 | 172 | if (owner.name == null || owner.name.isEmpty()) { |
duke@1 | 173 | return location(); |
duke@1 | 174 | } |
duke@1 | 175 | if (owner.type.tag == CLASS) { |
duke@1 | 176 | Type ownertype = types.asOuterSuper(site, owner); |
mcimadamore@80 | 177 | if (ownertype != null) return ownertype.tsym; |
duke@1 | 178 | } |
mcimadamore@80 | 179 | return owner; |
duke@1 | 180 | } |
duke@1 | 181 | |
duke@1 | 182 | /** The symbol's erased type. |
duke@1 | 183 | */ |
duke@1 | 184 | public Type erasure(Types types) { |
duke@1 | 185 | if (erasure_field == null) |
duke@1 | 186 | erasure_field = types.erasure(type); |
duke@1 | 187 | return erasure_field; |
duke@1 | 188 | } |
duke@1 | 189 | |
duke@1 | 190 | /** The external type of a symbol. This is the symbol's erased type |
duke@1 | 191 | * except for constructors of inner classes which get the enclosing |
duke@1 | 192 | * instance class added as first argument. |
duke@1 | 193 | */ |
duke@1 | 194 | public Type externalType(Types types) { |
duke@1 | 195 | Type t = erasure(types); |
jjg@113 | 196 | if (name == name.table.names.init && owner.hasOuterInstance()) { |
duke@1 | 197 | Type outerThisType = types.erasure(owner.type.getEnclosingType()); |
duke@1 | 198 | return new MethodType(t.getParameterTypes().prepend(outerThisType), |
duke@1 | 199 | t.getReturnType(), |
duke@1 | 200 | t.getThrownTypes(), |
duke@1 | 201 | t.tsym); |
duke@1 | 202 | } else { |
duke@1 | 203 | return t; |
duke@1 | 204 | } |
duke@1 | 205 | } |
duke@1 | 206 | |
duke@1 | 207 | public boolean isStatic() { |
duke@1 | 208 | return |
duke@1 | 209 | (flags() & STATIC) != 0 || |
duke@1 | 210 | (owner.flags() & INTERFACE) != 0 && kind != MTH; |
duke@1 | 211 | } |
duke@1 | 212 | |
duke@1 | 213 | public boolean isInterface() { |
duke@1 | 214 | return (flags() & INTERFACE) != 0; |
duke@1 | 215 | } |
duke@1 | 216 | |
mcimadamore@674 | 217 | /** Recognize if this symbol was marked @PolymorphicSignature in the source. */ |
mcimadamore@674 | 218 | public boolean isPolymorphicSignatureGeneric() { |
mcimadamore@674 | 219 | return (flags() & (POLYMORPHIC_SIGNATURE | HYPOTHETICAL)) == POLYMORPHIC_SIGNATURE; |
mcimadamore@674 | 220 | } |
mcimadamore@674 | 221 | |
mcimadamore@674 | 222 | /** Recognize if this symbol was split from a @PolymorphicSignature symbol in the source. */ |
mcimadamore@674 | 223 | public boolean isPolymorphicSignatureInstance() { |
mcimadamore@674 | 224 | return (flags() & (POLYMORPHIC_SIGNATURE | HYPOTHETICAL)) == (POLYMORPHIC_SIGNATURE | HYPOTHETICAL); |
mcimadamore@674 | 225 | } |
mcimadamore@674 | 226 | |
duke@1 | 227 | /** Is this symbol declared (directly or indirectly) local |
duke@1 | 228 | * to a method or variable initializer? |
duke@1 | 229 | * Also includes fields of inner classes which are in |
duke@1 | 230 | * turn local to a method or variable initializer. |
duke@1 | 231 | */ |
duke@1 | 232 | public boolean isLocal() { |
duke@1 | 233 | return |
duke@1 | 234 | (owner.kind & (VAR | MTH)) != 0 || |
duke@1 | 235 | (owner.kind == TYP && owner.isLocal()); |
duke@1 | 236 | } |
duke@1 | 237 | |
mcimadamore@537 | 238 | /** Has this symbol an empty name? This includes anonymous |
mcimadamore@537 | 239 | * inner classses. |
mcimadamore@537 | 240 | */ |
mcimadamore@537 | 241 | public boolean isAnonymous() { |
mcimadamore@537 | 242 | return name.isEmpty(); |
mcimadamore@537 | 243 | } |
mcimadamore@537 | 244 | |
duke@1 | 245 | /** Is this symbol a constructor? |
duke@1 | 246 | */ |
duke@1 | 247 | public boolean isConstructor() { |
jjg@113 | 248 | return name == name.table.names.init; |
duke@1 | 249 | } |
duke@1 | 250 | |
duke@1 | 251 | /** The fully qualified name of this symbol. |
duke@1 | 252 | * This is the same as the symbol's name except for class symbols, |
duke@1 | 253 | * which are handled separately. |
duke@1 | 254 | */ |
duke@1 | 255 | public Name getQualifiedName() { |
duke@1 | 256 | return name; |
duke@1 | 257 | } |
duke@1 | 258 | |
duke@1 | 259 | /** The fully qualified name of this symbol after converting to flat |
duke@1 | 260 | * representation. This is the same as the symbol's name except for |
duke@1 | 261 | * class symbols, which are handled separately. |
duke@1 | 262 | */ |
duke@1 | 263 | public Name flatName() { |
duke@1 | 264 | return getQualifiedName(); |
duke@1 | 265 | } |
duke@1 | 266 | |
duke@1 | 267 | /** If this is a class or package, its members, otherwise null. |
duke@1 | 268 | */ |
duke@1 | 269 | public Scope members() { |
duke@1 | 270 | return null; |
duke@1 | 271 | } |
duke@1 | 272 | |
duke@1 | 273 | /** A class is an inner class if it it has an enclosing instance class. |
duke@1 | 274 | */ |
duke@1 | 275 | public boolean isInner() { |
duke@1 | 276 | return type.getEnclosingType().tag == CLASS; |
duke@1 | 277 | } |
duke@1 | 278 | |
duke@1 | 279 | /** An inner class has an outer instance if it is not an interface |
duke@1 | 280 | * it has an enclosing instance class which might be referenced from the class. |
duke@1 | 281 | * Nested classes can see instance members of their enclosing class. |
duke@1 | 282 | * Their constructors carry an additional this$n parameter, inserted |
duke@1 | 283 | * implicitly by the compiler. |
duke@1 | 284 | * |
duke@1 | 285 | * @see #isInner |
duke@1 | 286 | */ |
duke@1 | 287 | public boolean hasOuterInstance() { |
duke@1 | 288 | return |
duke@1 | 289 | type.getEnclosingType().tag == CLASS && (flags() & (INTERFACE | NOOUTERTHIS)) == 0; |
duke@1 | 290 | } |
duke@1 | 291 | |
duke@1 | 292 | /** The closest enclosing class of this symbol's declaration. |
duke@1 | 293 | */ |
duke@1 | 294 | public ClassSymbol enclClass() { |
duke@1 | 295 | Symbol c = this; |
duke@1 | 296 | while (c != null && |
duke@1 | 297 | ((c.kind & TYP) == 0 || c.type.tag != CLASS)) { |
duke@1 | 298 | c = c.owner; |
duke@1 | 299 | } |
duke@1 | 300 | return (ClassSymbol)c; |
duke@1 | 301 | } |
duke@1 | 302 | |
duke@1 | 303 | /** The outermost class which indirectly owns this symbol. |
duke@1 | 304 | */ |
duke@1 | 305 | public ClassSymbol outermostClass() { |
duke@1 | 306 | Symbol sym = this; |
duke@1 | 307 | Symbol prev = null; |
duke@1 | 308 | while (sym.kind != PCK) { |
duke@1 | 309 | prev = sym; |
duke@1 | 310 | sym = sym.owner; |
duke@1 | 311 | } |
duke@1 | 312 | return (ClassSymbol) prev; |
duke@1 | 313 | } |
duke@1 | 314 | |
duke@1 | 315 | /** The package which indirectly owns this symbol. |
duke@1 | 316 | */ |
duke@1 | 317 | public PackageSymbol packge() { |
duke@1 | 318 | Symbol sym = this; |
duke@1 | 319 | while (sym.kind != PCK) { |
duke@1 | 320 | sym = sym.owner; |
duke@1 | 321 | } |
duke@1 | 322 | return (PackageSymbol) sym; |
duke@1 | 323 | } |
duke@1 | 324 | |
duke@1 | 325 | /** Is this symbol a subclass of `base'? Only defined for ClassSymbols. |
duke@1 | 326 | */ |
duke@1 | 327 | public boolean isSubClass(Symbol base, Types types) { |
duke@1 | 328 | throw new AssertionError("isSubClass " + this); |
duke@1 | 329 | } |
duke@1 | 330 | |
duke@1 | 331 | /** Fully check membership: hierarchy, protection, and hiding. |
duke@1 | 332 | * Does not exclude methods not inherited due to overriding. |
duke@1 | 333 | */ |
duke@1 | 334 | public boolean isMemberOf(TypeSymbol clazz, Types types) { |
duke@1 | 335 | return |
duke@1 | 336 | owner == clazz || |
duke@1 | 337 | clazz.isSubClass(owner, types) && |
duke@1 | 338 | isInheritedIn(clazz, types) && |
duke@1 | 339 | !hiddenIn((ClassSymbol)clazz, types); |
duke@1 | 340 | } |
duke@1 | 341 | |
duke@1 | 342 | /** Is this symbol the same as or enclosed by the given class? */ |
duke@1 | 343 | public boolean isEnclosedBy(ClassSymbol clazz) { |
duke@1 | 344 | for (Symbol sym = this; sym.kind != PCK; sym = sym.owner) |
duke@1 | 345 | if (sym == clazz) return true; |
duke@1 | 346 | return false; |
duke@1 | 347 | } |
duke@1 | 348 | |
duke@1 | 349 | /** Check for hiding. Note that this doesn't handle multiple |
duke@1 | 350 | * (interface) inheritance. */ |
duke@1 | 351 | private boolean hiddenIn(ClassSymbol clazz, Types types) { |
duke@1 | 352 | if (kind == MTH && (flags() & STATIC) == 0) return false; |
duke@1 | 353 | while (true) { |
duke@1 | 354 | if (owner == clazz) return false; |
duke@1 | 355 | Scope.Entry e = clazz.members().lookup(name); |
duke@1 | 356 | while (e.scope != null) { |
duke@1 | 357 | if (e.sym == this) return false; |
duke@1 | 358 | if (e.sym.kind == kind && |
duke@1 | 359 | (kind != MTH || |
duke@1 | 360 | (e.sym.flags() & STATIC) != 0 && |
duke@1 | 361 | types.isSubSignature(e.sym.type, type))) |
duke@1 | 362 | return true; |
duke@1 | 363 | e = e.next(); |
duke@1 | 364 | } |
duke@1 | 365 | Type superType = types.supertype(clazz.type); |
duke@1 | 366 | if (superType.tag != TypeTags.CLASS) return false; |
duke@1 | 367 | clazz = (ClassSymbol)superType.tsym; |
duke@1 | 368 | } |
duke@1 | 369 | } |
duke@1 | 370 | |
duke@1 | 371 | /** Is this symbol inherited into a given class? |
duke@1 | 372 | * PRE: If symbol's owner is a interface, |
duke@1 | 373 | * it is already assumed that the interface is a superinterface |
duke@1 | 374 | * of given class. |
duke@1 | 375 | * @param clazz The class for which we want to establish membership. |
duke@1 | 376 | * This must be a subclass of the member's owner. |
duke@1 | 377 | */ |
duke@1 | 378 | public boolean isInheritedIn(Symbol clazz, Types types) { |
duke@1 | 379 | switch ((int)(flags_field & Flags.AccessFlags)) { |
duke@1 | 380 | default: // error recovery |
duke@1 | 381 | case PUBLIC: |
duke@1 | 382 | return true; |
duke@1 | 383 | case PRIVATE: |
duke@1 | 384 | return this.owner == clazz; |
duke@1 | 385 | case PROTECTED: |
duke@1 | 386 | // we model interfaces as extending Object |
duke@1 | 387 | return (clazz.flags() & INTERFACE) == 0; |
duke@1 | 388 | case 0: |
duke@1 | 389 | PackageSymbol thisPackage = this.packge(); |
duke@1 | 390 | for (Symbol sup = clazz; |
duke@1 | 391 | sup != null && sup != this.owner; |
duke@1 | 392 | sup = types.supertype(sup.type).tsym) { |
mcimadamore@155 | 393 | while (sup.type.tag == TYPEVAR) |
mcimadamore@155 | 394 | sup = sup.type.getUpperBound().tsym; |
duke@1 | 395 | if (sup.type.isErroneous()) |
duke@1 | 396 | return true; // error recovery |
duke@1 | 397 | if ((sup.flags() & COMPOUND) != 0) |
duke@1 | 398 | continue; |
duke@1 | 399 | if (sup.packge() != thisPackage) |
duke@1 | 400 | return false; |
duke@1 | 401 | } |
duke@1 | 402 | return (clazz.flags() & INTERFACE) == 0; |
duke@1 | 403 | } |
duke@1 | 404 | } |
duke@1 | 405 | |
duke@1 | 406 | /** The (variable or method) symbol seen as a member of given |
duke@1 | 407 | * class type`site' (this might change the symbol's type). |
duke@1 | 408 | * This is used exclusively for producing diagnostics. |
duke@1 | 409 | */ |
duke@1 | 410 | public Symbol asMemberOf(Type site, Types types) { |
duke@1 | 411 | throw new AssertionError(); |
duke@1 | 412 | } |
duke@1 | 413 | |
duke@1 | 414 | /** Does this method symbol override `other' symbol, when both are seen as |
duke@1 | 415 | * members of class `origin'? It is assumed that _other is a member |
duke@1 | 416 | * of origin. |
duke@1 | 417 | * |
duke@1 | 418 | * It is assumed that both symbols have the same name. The static |
duke@1 | 419 | * modifier is ignored for this test. |
duke@1 | 420 | * |
duke@1 | 421 | * See JLS 8.4.6.1 (without transitivity) and 8.4.6.4 |
duke@1 | 422 | */ |
duke@1 | 423 | public boolean overrides(Symbol _other, TypeSymbol origin, Types types, boolean checkResult) { |
duke@1 | 424 | return false; |
duke@1 | 425 | } |
duke@1 | 426 | |
duke@1 | 427 | /** Complete the elaboration of this symbol's definition. |
duke@1 | 428 | */ |
duke@1 | 429 | public void complete() throws CompletionFailure { |
duke@1 | 430 | if (completer != null) { |
duke@1 | 431 | Completer c = completer; |
duke@1 | 432 | completer = null; |
duke@1 | 433 | c.complete(this); |
duke@1 | 434 | } |
duke@1 | 435 | } |
duke@1 | 436 | |
duke@1 | 437 | /** True if the symbol represents an entity that exists. |
duke@1 | 438 | */ |
duke@1 | 439 | public boolean exists() { |
duke@1 | 440 | return true; |
duke@1 | 441 | } |
duke@1 | 442 | |
duke@1 | 443 | public Type asType() { |
duke@1 | 444 | return type; |
duke@1 | 445 | } |
duke@1 | 446 | |
duke@1 | 447 | public Symbol getEnclosingElement() { |
duke@1 | 448 | return owner; |
duke@1 | 449 | } |
duke@1 | 450 | |
duke@1 | 451 | public ElementKind getKind() { |
duke@1 | 452 | return ElementKind.OTHER; // most unkind |
duke@1 | 453 | } |
duke@1 | 454 | |
duke@1 | 455 | public Set<Modifier> getModifiers() { |
duke@1 | 456 | return Flags.asModifierSet(flags()); |
duke@1 | 457 | } |
duke@1 | 458 | |
duke@1 | 459 | public Name getSimpleName() { |
duke@1 | 460 | return name; |
duke@1 | 461 | } |
duke@1 | 462 | |
duke@1 | 463 | /** |
duke@1 | 464 | * @deprecated this method should never be used by javac internally. |
duke@1 | 465 | */ |
duke@1 | 466 | @Deprecated |
duke@1 | 467 | public <A extends java.lang.annotation.Annotation> A getAnnotation(Class<A> annoType) { |
duke@1 | 468 | return JavacElements.getAnnotation(this, annoType); |
duke@1 | 469 | } |
duke@1 | 470 | |
duke@1 | 471 | // TODO: getEnclosedElements should return a javac List, fix in FilteredMemberList |
duke@1 | 472 | public java.util.List<Symbol> getEnclosedElements() { |
duke@1 | 473 | return List.nil(); |
duke@1 | 474 | } |
duke@1 | 475 | |
duke@1 | 476 | public List<TypeSymbol> getTypeParameters() { |
duke@1 | 477 | ListBuffer<TypeSymbol> l = ListBuffer.lb(); |
duke@1 | 478 | for (Type t : type.getTypeArguments()) { |
duke@1 | 479 | l.append(t.tsym); |
duke@1 | 480 | } |
duke@1 | 481 | return l.toList(); |
duke@1 | 482 | } |
duke@1 | 483 | |
duke@1 | 484 | public static class DelegatedSymbol extends Symbol { |
duke@1 | 485 | protected Symbol other; |
duke@1 | 486 | public DelegatedSymbol(Symbol other) { |
duke@1 | 487 | super(other.kind, other.flags_field, other.name, other.type, other.owner); |
duke@1 | 488 | this.other = other; |
duke@1 | 489 | } |
duke@1 | 490 | public String toString() { return other.toString(); } |
mcimadamore@80 | 491 | public Symbol location() { return other.location(); } |
mcimadamore@80 | 492 | public Symbol location(Type site, Types types) { return other.location(site, types); } |
duke@1 | 493 | public Type erasure(Types types) { return other.erasure(types); } |
duke@1 | 494 | public Type externalType(Types types) { return other.externalType(types); } |
duke@1 | 495 | public boolean isLocal() { return other.isLocal(); } |
duke@1 | 496 | public boolean isConstructor() { return other.isConstructor(); } |
duke@1 | 497 | public Name getQualifiedName() { return other.getQualifiedName(); } |
duke@1 | 498 | public Name flatName() { return other.flatName(); } |
duke@1 | 499 | public Scope members() { return other.members(); } |
duke@1 | 500 | public boolean isInner() { return other.isInner(); } |
duke@1 | 501 | public boolean hasOuterInstance() { return other.hasOuterInstance(); } |
duke@1 | 502 | public ClassSymbol enclClass() { return other.enclClass(); } |
duke@1 | 503 | public ClassSymbol outermostClass() { return other.outermostClass(); } |
duke@1 | 504 | public PackageSymbol packge() { return other.packge(); } |
duke@1 | 505 | public boolean isSubClass(Symbol base, Types types) { return other.isSubClass(base, types); } |
duke@1 | 506 | public boolean isMemberOf(TypeSymbol clazz, Types types) { return other.isMemberOf(clazz, types); } |
duke@1 | 507 | public boolean isEnclosedBy(ClassSymbol clazz) { return other.isEnclosedBy(clazz); } |
duke@1 | 508 | public boolean isInheritedIn(Symbol clazz, Types types) { return other.isInheritedIn(clazz, types); } |
duke@1 | 509 | public Symbol asMemberOf(Type site, Types types) { return other.asMemberOf(site, types); } |
duke@1 | 510 | public void complete() throws CompletionFailure { other.complete(); } |
duke@1 | 511 | |
duke@1 | 512 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 513 | return other.accept(v, p); |
duke@1 | 514 | } |
mcimadamore@121 | 515 | |
mcimadamore@121 | 516 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 517 | return v.visitSymbol(other, p); |
mcimadamore@121 | 518 | } |
duke@1 | 519 | } |
duke@1 | 520 | |
duke@1 | 521 | /** A class for type symbols. Type variables are represented by instances |
duke@1 | 522 | * of this class, classes and packages by instances of subclasses. |
duke@1 | 523 | */ |
duke@1 | 524 | public static class TypeSymbol |
duke@1 | 525 | extends Symbol implements TypeParameterElement { |
duke@1 | 526 | // Implements TypeParameterElement because type parameters don't |
duke@1 | 527 | // have their own TypeSymbol subclass. |
duke@1 | 528 | // TODO: type parameters should have their own TypeSymbol subclass |
duke@1 | 529 | |
duke@1 | 530 | public TypeSymbol(long flags, Name name, Type type, Symbol owner) { |
duke@1 | 531 | super(TYP, flags, name, type, owner); |
duke@1 | 532 | } |
duke@1 | 533 | |
duke@1 | 534 | /** form a fully qualified name from a name and an owner |
duke@1 | 535 | */ |
duke@1 | 536 | static public Name formFullName(Name name, Symbol owner) { |
duke@1 | 537 | if (owner == null) return name; |
duke@1 | 538 | if (((owner.kind != ERR)) && |
duke@1 | 539 | ((owner.kind & (VAR | MTH)) != 0 |
duke@1 | 540 | || (owner.kind == TYP && owner.type.tag == TYPEVAR) |
duke@1 | 541 | )) return name; |
duke@1 | 542 | Name prefix = owner.getQualifiedName(); |
jjg@113 | 543 | if (prefix == null || prefix == prefix.table.names.empty) |
duke@1 | 544 | return name; |
duke@1 | 545 | else return prefix.append('.', name); |
duke@1 | 546 | } |
duke@1 | 547 | |
duke@1 | 548 | /** form a fully qualified name from a name and an owner, after |
duke@1 | 549 | * converting to flat representation |
duke@1 | 550 | */ |
duke@1 | 551 | static public Name formFlatName(Name name, Symbol owner) { |
duke@1 | 552 | if (owner == null || |
duke@1 | 553 | (owner.kind & (VAR | MTH)) != 0 |
duke@1 | 554 | || (owner.kind == TYP && owner.type.tag == TYPEVAR) |
duke@1 | 555 | ) return name; |
duke@1 | 556 | char sep = owner.kind == TYP ? '$' : '.'; |
duke@1 | 557 | Name prefix = owner.flatName(); |
jjg@113 | 558 | if (prefix == null || prefix == prefix.table.names.empty) |
duke@1 | 559 | return name; |
duke@1 | 560 | else return prefix.append(sep, name); |
duke@1 | 561 | } |
duke@1 | 562 | |
duke@1 | 563 | /** |
duke@1 | 564 | * A total ordering between type symbols that refines the |
duke@1 | 565 | * class inheritance graph. |
duke@1 | 566 | * |
duke@1 | 567 | * Typevariables always precede other kinds of symbols. |
duke@1 | 568 | */ |
duke@1 | 569 | public final boolean precedes(TypeSymbol that, Types types) { |
duke@1 | 570 | if (this == that) |
duke@1 | 571 | return false; |
duke@1 | 572 | if (this.type.tag == that.type.tag) { |
duke@1 | 573 | if (this.type.tag == CLASS) { |
duke@1 | 574 | return |
duke@1 | 575 | types.rank(that.type) < types.rank(this.type) || |
duke@1 | 576 | types.rank(that.type) == types.rank(this.type) && |
duke@1 | 577 | that.getQualifiedName().compareTo(this.getQualifiedName()) < 0; |
duke@1 | 578 | } else if (this.type.tag == TYPEVAR) { |
duke@1 | 579 | return types.isSubtype(this.type, that.type); |
duke@1 | 580 | } |
duke@1 | 581 | } |
duke@1 | 582 | return this.type.tag == TYPEVAR; |
duke@1 | 583 | } |
duke@1 | 584 | |
duke@1 | 585 | // For type params; overridden in subclasses. |
duke@1 | 586 | public ElementKind getKind() { |
duke@1 | 587 | return ElementKind.TYPE_PARAMETER; |
duke@1 | 588 | } |
duke@1 | 589 | |
duke@1 | 590 | public java.util.List<Symbol> getEnclosedElements() { |
duke@1 | 591 | List<Symbol> list = List.nil(); |
sundar@666 | 592 | if (kind == TYP && type.tag == TYPEVAR) { |
sundar@666 | 593 | return list; |
sundar@666 | 594 | } |
duke@1 | 595 | for (Scope.Entry e = members().elems; e != null; e = e.sibling) { |
duke@1 | 596 | if (e.sym != null && (e.sym.flags() & SYNTHETIC) == 0 && e.sym.owner == this) |
duke@1 | 597 | list = list.prepend(e.sym); |
duke@1 | 598 | } |
duke@1 | 599 | return list; |
duke@1 | 600 | } |
duke@1 | 601 | |
duke@1 | 602 | // For type params. |
duke@1 | 603 | // Perhaps not needed if getEnclosingElement can be spec'ed |
duke@1 | 604 | // to do the same thing. |
duke@1 | 605 | // TODO: getGenericElement() might not be needed |
duke@1 | 606 | public Symbol getGenericElement() { |
duke@1 | 607 | return owner; |
duke@1 | 608 | } |
duke@1 | 609 | |
duke@1 | 610 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 611 | assert type.tag == TYPEVAR; // else override will be invoked |
duke@1 | 612 | return v.visitTypeParameter(this, p); |
duke@1 | 613 | } |
duke@1 | 614 | |
mcimadamore@121 | 615 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 616 | return v.visitTypeSymbol(this, p); |
mcimadamore@121 | 617 | } |
mcimadamore@121 | 618 | |
duke@1 | 619 | public List<Type> getBounds() { |
duke@1 | 620 | TypeVar t = (TypeVar)type; |
duke@1 | 621 | Type bound = t.getUpperBound(); |
duke@1 | 622 | if (!bound.isCompound()) |
duke@1 | 623 | return List.of(bound); |
duke@1 | 624 | ClassType ct = (ClassType)bound; |
duke@1 | 625 | if (!ct.tsym.erasure_field.isInterface()) { |
duke@1 | 626 | return ct.interfaces_field.prepend(ct.supertype_field); |
duke@1 | 627 | } else { |
duke@1 | 628 | // No superclass was given in bounds. |
duke@1 | 629 | // In this case, supertype is Object, erasure is first interface. |
duke@1 | 630 | return ct.interfaces_field; |
duke@1 | 631 | } |
duke@1 | 632 | } |
duke@1 | 633 | } |
duke@1 | 634 | |
duke@1 | 635 | /** A class for package symbols |
duke@1 | 636 | */ |
duke@1 | 637 | public static class PackageSymbol extends TypeSymbol |
duke@1 | 638 | implements PackageElement { |
duke@1 | 639 | |
duke@1 | 640 | public Scope members_field; |
duke@1 | 641 | public Name fullname; |
duke@1 | 642 | public ClassSymbol package_info; // see bug 6443073 |
duke@1 | 643 | |
duke@1 | 644 | public PackageSymbol(Name name, Type type, Symbol owner) { |
duke@1 | 645 | super(0, name, type, owner); |
duke@1 | 646 | this.kind = PCK; |
duke@1 | 647 | this.members_field = null; |
duke@1 | 648 | this.fullname = formFullName(name, owner); |
duke@1 | 649 | } |
duke@1 | 650 | |
duke@1 | 651 | public PackageSymbol(Name name, Symbol owner) { |
duke@1 | 652 | this(name, null, owner); |
duke@1 | 653 | this.type = new PackageType(this); |
duke@1 | 654 | } |
duke@1 | 655 | |
duke@1 | 656 | public String toString() { |
duke@1 | 657 | return fullname.toString(); |
duke@1 | 658 | } |
duke@1 | 659 | |
duke@1 | 660 | public Name getQualifiedName() { |
duke@1 | 661 | return fullname; |
duke@1 | 662 | } |
duke@1 | 663 | |
duke@1 | 664 | public boolean isUnnamed() { |
duke@1 | 665 | return name.isEmpty() && owner != null; |
duke@1 | 666 | } |
duke@1 | 667 | |
duke@1 | 668 | public Scope members() { |
duke@1 | 669 | if (completer != null) complete(); |
duke@1 | 670 | return members_field; |
duke@1 | 671 | } |
duke@1 | 672 | |
duke@1 | 673 | public long flags() { |
duke@1 | 674 | if (completer != null) complete(); |
duke@1 | 675 | return flags_field; |
duke@1 | 676 | } |
duke@1 | 677 | |
duke@1 | 678 | public List<Attribute.Compound> getAnnotationMirrors() { |
duke@1 | 679 | if (completer != null) complete(); |
jjg@483 | 680 | if (package_info != null && package_info.completer != null) { |
jjg@483 | 681 | package_info.complete(); |
jjg@483 | 682 | if (attributes_field.isEmpty()) |
jjg@483 | 683 | attributes_field = package_info.attributes_field; |
jjg@483 | 684 | } |
duke@1 | 685 | assert attributes_field != null; |
duke@1 | 686 | return attributes_field; |
duke@1 | 687 | } |
duke@1 | 688 | |
duke@1 | 689 | /** A package "exists" if a type or package that exists has |
duke@1 | 690 | * been seen within it. |
duke@1 | 691 | */ |
duke@1 | 692 | public boolean exists() { |
duke@1 | 693 | return (flags_field & EXISTS) != 0; |
duke@1 | 694 | } |
duke@1 | 695 | |
duke@1 | 696 | public ElementKind getKind() { |
duke@1 | 697 | return ElementKind.PACKAGE; |
duke@1 | 698 | } |
duke@1 | 699 | |
duke@1 | 700 | public Symbol getEnclosingElement() { |
duke@1 | 701 | return null; |
duke@1 | 702 | } |
duke@1 | 703 | |
duke@1 | 704 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 705 | return v.visitPackage(this, p); |
duke@1 | 706 | } |
mcimadamore@121 | 707 | |
mcimadamore@121 | 708 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 709 | return v.visitPackageSymbol(this, p); |
mcimadamore@121 | 710 | } |
duke@1 | 711 | } |
duke@1 | 712 | |
duke@1 | 713 | /** A class for class symbols |
duke@1 | 714 | */ |
duke@1 | 715 | public static class ClassSymbol extends TypeSymbol implements TypeElement { |
duke@1 | 716 | |
duke@1 | 717 | /** a scope for all class members; variables, methods and inner classes |
duke@1 | 718 | * type parameters are not part of this scope |
duke@1 | 719 | */ |
duke@1 | 720 | public Scope members_field; |
duke@1 | 721 | |
duke@1 | 722 | /** the fully qualified name of the class, i.e. pck.outer.inner. |
duke@1 | 723 | * null for anonymous classes |
duke@1 | 724 | */ |
duke@1 | 725 | public Name fullname; |
duke@1 | 726 | |
duke@1 | 727 | /** the fully qualified name of the class after converting to flat |
duke@1 | 728 | * representation, i.e. pck.outer$inner, |
duke@1 | 729 | * set externally for local and anonymous classes |
duke@1 | 730 | */ |
duke@1 | 731 | public Name flatname; |
duke@1 | 732 | |
duke@1 | 733 | /** the sourcefile where the class came from |
duke@1 | 734 | */ |
duke@1 | 735 | public JavaFileObject sourcefile; |
duke@1 | 736 | |
duke@1 | 737 | /** the classfile from where to load this class |
duke@1 | 738 | * this will have extension .class or .java |
duke@1 | 739 | */ |
duke@1 | 740 | public JavaFileObject classfile; |
duke@1 | 741 | |
duke@1 | 742 | /** the constant pool of the class |
duke@1 | 743 | */ |
duke@1 | 744 | public Pool pool; |
duke@1 | 745 | |
duke@1 | 746 | public ClassSymbol(long flags, Name name, Type type, Symbol owner) { |
duke@1 | 747 | super(flags, name, type, owner); |
duke@1 | 748 | this.members_field = null; |
duke@1 | 749 | this.fullname = formFullName(name, owner); |
duke@1 | 750 | this.flatname = formFlatName(name, owner); |
duke@1 | 751 | this.sourcefile = null; |
duke@1 | 752 | this.classfile = null; |
duke@1 | 753 | this.pool = null; |
duke@1 | 754 | } |
duke@1 | 755 | |
duke@1 | 756 | public ClassSymbol(long flags, Name name, Symbol owner) { |
duke@1 | 757 | this( |
duke@1 | 758 | flags, |
duke@1 | 759 | name, |
duke@1 | 760 | new ClassType(Type.noType, null, null), |
duke@1 | 761 | owner); |
duke@1 | 762 | this.type.tsym = this; |
duke@1 | 763 | } |
duke@1 | 764 | |
duke@1 | 765 | /** The Java source which this symbol represents. |
duke@1 | 766 | */ |
duke@1 | 767 | public String toString() { |
duke@1 | 768 | return className(); |
duke@1 | 769 | } |
duke@1 | 770 | |
duke@1 | 771 | public long flags() { |
duke@1 | 772 | if (completer != null) complete(); |
duke@1 | 773 | return flags_field; |
duke@1 | 774 | } |
duke@1 | 775 | |
duke@1 | 776 | public Scope members() { |
duke@1 | 777 | if (completer != null) complete(); |
duke@1 | 778 | return members_field; |
duke@1 | 779 | } |
duke@1 | 780 | |
duke@1 | 781 | public List<Attribute.Compound> getAnnotationMirrors() { |
duke@1 | 782 | if (completer != null) complete(); |
duke@1 | 783 | assert attributes_field != null; |
duke@1 | 784 | return attributes_field; |
duke@1 | 785 | } |
duke@1 | 786 | |
duke@1 | 787 | public Type erasure(Types types) { |
duke@1 | 788 | if (erasure_field == null) |
duke@1 | 789 | erasure_field = new ClassType(types.erasure(type.getEnclosingType()), |
duke@1 | 790 | List.<Type>nil(), this); |
duke@1 | 791 | return erasure_field; |
duke@1 | 792 | } |
duke@1 | 793 | |
duke@1 | 794 | public String className() { |
jjg@113 | 795 | if (name.isEmpty()) |
duke@1 | 796 | return |
duke@1 | 797 | Log.getLocalizedString("anonymous.class", flatname); |
duke@1 | 798 | else |
duke@1 | 799 | return fullname.toString(); |
duke@1 | 800 | } |
duke@1 | 801 | |
duke@1 | 802 | public Name getQualifiedName() { |
duke@1 | 803 | return fullname; |
duke@1 | 804 | } |
duke@1 | 805 | |
duke@1 | 806 | public Name flatName() { |
duke@1 | 807 | return flatname; |
duke@1 | 808 | } |
duke@1 | 809 | |
duke@1 | 810 | public boolean isSubClass(Symbol base, Types types) { |
duke@1 | 811 | if (this == base) { |
duke@1 | 812 | return true; |
duke@1 | 813 | } else if ((base.flags() & INTERFACE) != 0) { |
duke@1 | 814 | for (Type t = type; t.tag == CLASS; t = types.supertype(t)) |
duke@1 | 815 | for (List<Type> is = types.interfaces(t); |
duke@1 | 816 | is.nonEmpty(); |
duke@1 | 817 | is = is.tail) |
duke@1 | 818 | if (is.head.tsym.isSubClass(base, types)) return true; |
duke@1 | 819 | } else { |
duke@1 | 820 | for (Type t = type; t.tag == CLASS; t = types.supertype(t)) |
duke@1 | 821 | if (t.tsym == base) return true; |
duke@1 | 822 | } |
duke@1 | 823 | return false; |
duke@1 | 824 | } |
duke@1 | 825 | |
duke@1 | 826 | /** Complete the elaboration of this symbol's definition. |
duke@1 | 827 | */ |
duke@1 | 828 | public void complete() throws CompletionFailure { |
duke@1 | 829 | try { |
duke@1 | 830 | super.complete(); |
duke@1 | 831 | } catch (CompletionFailure ex) { |
duke@1 | 832 | // quiet error recovery |
duke@1 | 833 | flags_field |= (PUBLIC|STATIC); |
jjg@110 | 834 | this.type = new ErrorType(this, Type.noType); |
duke@1 | 835 | throw ex; |
duke@1 | 836 | } |
duke@1 | 837 | } |
duke@1 | 838 | |
duke@1 | 839 | public List<Type> getInterfaces() { |
duke@1 | 840 | complete(); |
duke@1 | 841 | if (type instanceof ClassType) { |
duke@1 | 842 | ClassType t = (ClassType)type; |
duke@1 | 843 | if (t.interfaces_field == null) // FIXME: shouldn't be null |
duke@1 | 844 | t.interfaces_field = List.nil(); |
duke@1 | 845 | return t.interfaces_field; |
duke@1 | 846 | } else { |
duke@1 | 847 | return List.nil(); |
duke@1 | 848 | } |
duke@1 | 849 | } |
duke@1 | 850 | |
duke@1 | 851 | public Type getSuperclass() { |
duke@1 | 852 | complete(); |
duke@1 | 853 | if (type instanceof ClassType) { |
duke@1 | 854 | ClassType t = (ClassType)type; |
duke@1 | 855 | if (t.supertype_field == null) // FIXME: shouldn't be null |
duke@1 | 856 | t.supertype_field = Type.noType; |
duke@1 | 857 | // An interface has no superclass; its supertype is Object. |
duke@1 | 858 | return t.isInterface() |
duke@1 | 859 | ? Type.noType |
duke@1 | 860 | : t.supertype_field; |
duke@1 | 861 | } else { |
duke@1 | 862 | return Type.noType; |
duke@1 | 863 | } |
duke@1 | 864 | } |
duke@1 | 865 | |
duke@1 | 866 | public ElementKind getKind() { |
duke@1 | 867 | long flags = flags(); |
duke@1 | 868 | if ((flags & ANNOTATION) != 0) |
duke@1 | 869 | return ElementKind.ANNOTATION_TYPE; |
duke@1 | 870 | else if ((flags & INTERFACE) != 0) |
duke@1 | 871 | return ElementKind.INTERFACE; |
duke@1 | 872 | else if ((flags & ENUM) != 0) |
duke@1 | 873 | return ElementKind.ENUM; |
duke@1 | 874 | else |
duke@1 | 875 | return ElementKind.CLASS; |
duke@1 | 876 | } |
duke@1 | 877 | |
duke@1 | 878 | public NestingKind getNestingKind() { |
duke@1 | 879 | complete(); |
duke@1 | 880 | if (owner.kind == PCK) |
duke@1 | 881 | return NestingKind.TOP_LEVEL; |
duke@1 | 882 | else if (name.isEmpty()) |
duke@1 | 883 | return NestingKind.ANONYMOUS; |
duke@1 | 884 | else if (owner.kind == MTH) |
duke@1 | 885 | return NestingKind.LOCAL; |
duke@1 | 886 | else |
duke@1 | 887 | return NestingKind.MEMBER; |
duke@1 | 888 | } |
duke@1 | 889 | |
duke@1 | 890 | /** |
duke@1 | 891 | * @deprecated this method should never be used by javac internally. |
duke@1 | 892 | */ |
duke@1 | 893 | @Override @Deprecated |
duke@1 | 894 | public <A extends java.lang.annotation.Annotation> A getAnnotation(Class<A> annoType) { |
duke@1 | 895 | return JavacElements.getAnnotation(this, annoType); |
duke@1 | 896 | } |
duke@1 | 897 | |
duke@1 | 898 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 899 | return v.visitType(this, p); |
duke@1 | 900 | } |
mcimadamore@121 | 901 | |
mcimadamore@121 | 902 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 903 | return v.visitClassSymbol(this, p); |
mcimadamore@121 | 904 | } |
duke@1 | 905 | } |
duke@1 | 906 | |
duke@1 | 907 | |
duke@1 | 908 | /** A class for variable symbols |
duke@1 | 909 | */ |
duke@1 | 910 | public static class VarSymbol extends Symbol implements VariableElement { |
duke@1 | 911 | |
duke@1 | 912 | /** The variable's declaration position. |
duke@1 | 913 | */ |
duke@1 | 914 | public int pos = Position.NOPOS; |
duke@1 | 915 | |
duke@1 | 916 | /** The variable's address. Used for different purposes during |
duke@1 | 917 | * flow analysis, translation and code generation. |
duke@1 | 918 | * Flow analysis: |
duke@1 | 919 | * If this is a blank final or local variable, its sequence number. |
duke@1 | 920 | * Translation: |
duke@1 | 921 | * If this is a private field, its access number. |
duke@1 | 922 | * Code generation: |
duke@1 | 923 | * If this is a local variable, its logical slot number. |
duke@1 | 924 | */ |
duke@1 | 925 | public int adr = -1; |
duke@1 | 926 | |
duke@1 | 927 | /** Construct a variable symbol, given its flags, name, type and owner. |
duke@1 | 928 | */ |
duke@1 | 929 | public VarSymbol(long flags, Name name, Type type, Symbol owner) { |
duke@1 | 930 | super(VAR, flags, name, type, owner); |
duke@1 | 931 | } |
duke@1 | 932 | |
duke@1 | 933 | /** Clone this symbol with new owner. |
duke@1 | 934 | */ |
duke@1 | 935 | public VarSymbol clone(Symbol newOwner) { |
duke@1 | 936 | VarSymbol v = new VarSymbol(flags_field, name, type, newOwner); |
duke@1 | 937 | v.pos = pos; |
duke@1 | 938 | v.adr = adr; |
duke@1 | 939 | v.data = data; |
duke@1 | 940 | // System.out.println("clone " + v + " in " + newOwner);//DEBUG |
duke@1 | 941 | return v; |
duke@1 | 942 | } |
duke@1 | 943 | |
duke@1 | 944 | public String toString() { |
duke@1 | 945 | return name.toString(); |
duke@1 | 946 | } |
duke@1 | 947 | |
duke@1 | 948 | public Symbol asMemberOf(Type site, Types types) { |
duke@1 | 949 | return new VarSymbol(flags_field, name, types.memberType(site, this), owner); |
duke@1 | 950 | } |
duke@1 | 951 | |
duke@1 | 952 | public ElementKind getKind() { |
duke@1 | 953 | long flags = flags(); |
duke@1 | 954 | if ((flags & PARAMETER) != 0) { |
duke@1 | 955 | if (isExceptionParameter()) |
duke@1 | 956 | return ElementKind.EXCEPTION_PARAMETER; |
duke@1 | 957 | else |
duke@1 | 958 | return ElementKind.PARAMETER; |
duke@1 | 959 | } else if ((flags & ENUM) != 0) { |
duke@1 | 960 | return ElementKind.ENUM_CONSTANT; |
duke@1 | 961 | } else if (owner.kind == TYP || owner.kind == ERR) { |
duke@1 | 962 | return ElementKind.FIELD; |
sundar@697 | 963 | } else if (isResourceVariable()) { |
sundar@697 | 964 | return ElementKind.RESOURCE_VARIABLE; |
duke@1 | 965 | } else { |
duke@1 | 966 | return ElementKind.LOCAL_VARIABLE; |
duke@1 | 967 | } |
duke@1 | 968 | } |
duke@1 | 969 | |
duke@1 | 970 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 971 | return v.visitVariable(this, p); |
duke@1 | 972 | } |
duke@1 | 973 | |
duke@1 | 974 | public Object getConstantValue() { // Mirror API |
duke@1 | 975 | return Constants.decode(getConstValue(), type); |
duke@1 | 976 | } |
duke@1 | 977 | |
duke@1 | 978 | public void setLazyConstValue(final Env<AttrContext> env, |
duke@1 | 979 | final Log log, |
duke@1 | 980 | final Attr attr, |
duke@1 | 981 | final JCTree.JCExpression initializer) |
duke@1 | 982 | { |
duke@1 | 983 | setData(new Callable<Object>() { |
duke@1 | 984 | public Object call() { |
duke@1 | 985 | JavaFileObject source = log.useSource(env.toplevel.sourcefile); |
duke@1 | 986 | try { |
duke@1 | 987 | Type itype = attr.attribExpr(initializer, env, type); |
duke@1 | 988 | if (itype.constValue() != null) |
duke@1 | 989 | return attr.coerce(itype, type).constValue(); |
duke@1 | 990 | else |
duke@1 | 991 | return null; |
duke@1 | 992 | } finally { |
duke@1 | 993 | log.useSource(source); |
duke@1 | 994 | } |
duke@1 | 995 | } |
duke@1 | 996 | }); |
duke@1 | 997 | } |
duke@1 | 998 | |
duke@1 | 999 | /** |
duke@1 | 1000 | * The variable's constant value, if this is a constant. |
duke@1 | 1001 | * Before the constant value is evaluated, it points to an |
duke@1 | 1002 | * initalizer environment. If this is not a constant, it can |
duke@1 | 1003 | * be used for other stuff. |
duke@1 | 1004 | */ |
duke@1 | 1005 | private Object data; |
duke@1 | 1006 | |
duke@1 | 1007 | public boolean isExceptionParameter() { |
duke@1 | 1008 | return data == ElementKind.EXCEPTION_PARAMETER; |
duke@1 | 1009 | } |
duke@1 | 1010 | |
darcy@609 | 1011 | public boolean isResourceVariable() { |
darcy@609 | 1012 | return data == ElementKind.RESOURCE_VARIABLE; |
darcy@609 | 1013 | } |
darcy@609 | 1014 | |
duke@1 | 1015 | public Object getConstValue() { |
duke@1 | 1016 | // TODO: Consider if getConstValue and getConstantValue can be collapsed |
darcy@609 | 1017 | if (data == ElementKind.EXCEPTION_PARAMETER || |
darcy@609 | 1018 | data == ElementKind.RESOURCE_VARIABLE) { |
duke@1 | 1019 | return null; |
duke@1 | 1020 | } else if (data instanceof Callable<?>) { |
darcy@609 | 1021 | // In this case, this is a final variable, with an as |
duke@1 | 1022 | // yet unevaluated initializer. |
duke@1 | 1023 | Callable<?> eval = (Callable<?>)data; |
duke@1 | 1024 | data = null; // to make sure we don't evaluate this twice. |
duke@1 | 1025 | try { |
duke@1 | 1026 | data = eval.call(); |
duke@1 | 1027 | } catch (Exception ex) { |
duke@1 | 1028 | throw new AssertionError(ex); |
duke@1 | 1029 | } |
duke@1 | 1030 | } |
duke@1 | 1031 | return data; |
duke@1 | 1032 | } |
duke@1 | 1033 | |
duke@1 | 1034 | public void setData(Object data) { |
duke@1 | 1035 | assert !(data instanceof Env<?>) : this; |
duke@1 | 1036 | this.data = data; |
duke@1 | 1037 | } |
mcimadamore@121 | 1038 | |
mcimadamore@121 | 1039 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 1040 | return v.visitVarSymbol(this, p); |
mcimadamore@121 | 1041 | } |
duke@1 | 1042 | } |
duke@1 | 1043 | |
duke@1 | 1044 | /** A class for method symbols. |
duke@1 | 1045 | */ |
duke@1 | 1046 | public static class MethodSymbol extends Symbol implements ExecutableElement { |
duke@1 | 1047 | |
duke@1 | 1048 | /** The code of the method. */ |
duke@1 | 1049 | public Code code = null; |
duke@1 | 1050 | |
duke@1 | 1051 | /** The parameters of the method. */ |
duke@1 | 1052 | public List<VarSymbol> params = null; |
duke@1 | 1053 | |
duke@1 | 1054 | /** The names of the parameters */ |
duke@1 | 1055 | public List<Name> savedParameterNames; |
duke@1 | 1056 | |
duke@1 | 1057 | /** For an attribute field accessor, its default value if any. |
duke@1 | 1058 | * The value is null if none appeared in the method |
duke@1 | 1059 | * declaration. |
duke@1 | 1060 | */ |
duke@1 | 1061 | public Attribute defaultValue = null; |
duke@1 | 1062 | |
duke@1 | 1063 | /** Construct a method symbol, given its flags, name, type and owner. |
duke@1 | 1064 | */ |
duke@1 | 1065 | public MethodSymbol(long flags, Name name, Type type, Symbol owner) { |
duke@1 | 1066 | super(MTH, flags, name, type, owner); |
duke@1 | 1067 | assert owner.type.tag != TYPEVAR : owner + "." + name; |
duke@1 | 1068 | } |
duke@1 | 1069 | |
duke@1 | 1070 | /** Clone this symbol with new owner. |
duke@1 | 1071 | */ |
duke@1 | 1072 | public MethodSymbol clone(Symbol newOwner) { |
duke@1 | 1073 | MethodSymbol m = new MethodSymbol(flags_field, name, type, newOwner); |
duke@1 | 1074 | m.code = code; |
duke@1 | 1075 | return m; |
duke@1 | 1076 | } |
duke@1 | 1077 | |
duke@1 | 1078 | /** The Java source which this symbol represents. |
duke@1 | 1079 | */ |
duke@1 | 1080 | public String toString() { |
duke@1 | 1081 | if ((flags() & BLOCK) != 0) { |
duke@1 | 1082 | return owner.name.toString(); |
duke@1 | 1083 | } else { |
jjg@113 | 1084 | String s = (name == name.table.names.init) |
duke@1 | 1085 | ? owner.name.toString() |
duke@1 | 1086 | : name.toString(); |
duke@1 | 1087 | if (type != null) { |
duke@1 | 1088 | if (type.tag == FORALL) |
duke@1 | 1089 | s = "<" + ((ForAll)type).getTypeArguments() + ">" + s; |
duke@1 | 1090 | s += "(" + type.argtypes((flags() & VARARGS) != 0) + ")"; |
duke@1 | 1091 | } |
duke@1 | 1092 | return s; |
duke@1 | 1093 | } |
duke@1 | 1094 | } |
duke@1 | 1095 | |
duke@1 | 1096 | /** find a symbol that this (proxy method) symbol implements. |
duke@1 | 1097 | * @param c The class whose members are searched for |
duke@1 | 1098 | * implementations |
duke@1 | 1099 | */ |
duke@1 | 1100 | public Symbol implemented(TypeSymbol c, Types types) { |
duke@1 | 1101 | Symbol impl = null; |
duke@1 | 1102 | for (List<Type> is = types.interfaces(c.type); |
duke@1 | 1103 | impl == null && is.nonEmpty(); |
duke@1 | 1104 | is = is.tail) { |
duke@1 | 1105 | TypeSymbol i = is.head.tsym; |
mcimadamore@780 | 1106 | impl = implementedIn(i, types); |
mcimadamore@780 | 1107 | if (impl == null) |
mcimadamore@780 | 1108 | impl = implemented(i, types); |
mcimadamore@780 | 1109 | } |
mcimadamore@780 | 1110 | return impl; |
mcimadamore@780 | 1111 | } |
mcimadamore@780 | 1112 | |
mcimadamore@780 | 1113 | public Symbol implementedIn(TypeSymbol c, Types types) { |
mcimadamore@780 | 1114 | Symbol impl = null; |
mcimadamore@780 | 1115 | for (Scope.Entry e = c.members().lookup(name); |
mcimadamore@780 | 1116 | impl == null && e.scope != null; |
mcimadamore@780 | 1117 | e = e.next()) { |
mcimadamore@780 | 1118 | if (this.overrides(e.sym, (TypeSymbol)owner, types, true) && |
mcimadamore@780 | 1119 | // FIXME: I suspect the following requires a |
mcimadamore@780 | 1120 | // subst() for a parametric return type. |
mcimadamore@780 | 1121 | types.isSameType(type.getReturnType(), |
mcimadamore@780 | 1122 | types.memberType(owner.type, e.sym).getReturnType())) { |
mcimadamore@780 | 1123 | impl = e.sym; |
duke@1 | 1124 | } |
duke@1 | 1125 | } |
duke@1 | 1126 | return impl; |
duke@1 | 1127 | } |
duke@1 | 1128 | |
duke@1 | 1129 | /** Will the erasure of this method be considered by the VM to |
duke@1 | 1130 | * override the erasure of the other when seen from class `origin'? |
duke@1 | 1131 | */ |
duke@1 | 1132 | public boolean binaryOverrides(Symbol _other, TypeSymbol origin, Types types) { |
duke@1 | 1133 | if (isConstructor() || _other.kind != MTH) return false; |
duke@1 | 1134 | |
duke@1 | 1135 | if (this == _other) return true; |
duke@1 | 1136 | MethodSymbol other = (MethodSymbol)_other; |
duke@1 | 1137 | |
duke@1 | 1138 | // check for a direct implementation |
duke@1 | 1139 | if (other.isOverridableIn((TypeSymbol)owner) && |
duke@1 | 1140 | types.asSuper(owner.type, other.owner) != null && |
duke@1 | 1141 | types.isSameType(erasure(types), other.erasure(types))) |
duke@1 | 1142 | return true; |
duke@1 | 1143 | |
duke@1 | 1144 | // check for an inherited implementation |
duke@1 | 1145 | return |
duke@1 | 1146 | (flags() & ABSTRACT) == 0 && |
duke@1 | 1147 | other.isOverridableIn(origin) && |
duke@1 | 1148 | this.isMemberOf(origin, types) && |
duke@1 | 1149 | types.isSameType(erasure(types), other.erasure(types)); |
duke@1 | 1150 | } |
duke@1 | 1151 | |
duke@1 | 1152 | /** The implementation of this (abstract) symbol in class origin, |
duke@1 | 1153 | * from the VM's point of view, null if method does not have an |
duke@1 | 1154 | * implementation in class. |
duke@1 | 1155 | * @param origin The class of which the implementation is a member. |
duke@1 | 1156 | */ |
duke@1 | 1157 | public MethodSymbol binaryImplementation(ClassSymbol origin, Types types) { |
duke@1 | 1158 | for (TypeSymbol c = origin; c != null; c = types.supertype(c.type).tsym) { |
duke@1 | 1159 | for (Scope.Entry e = c.members().lookup(name); |
duke@1 | 1160 | e.scope != null; |
duke@1 | 1161 | e = e.next()) { |
duke@1 | 1162 | if (e.sym.kind == MTH && |
duke@1 | 1163 | ((MethodSymbol)e.sym).binaryOverrides(this, origin, types)) |
duke@1 | 1164 | return (MethodSymbol)e.sym; |
duke@1 | 1165 | } |
duke@1 | 1166 | } |
duke@1 | 1167 | return null; |
duke@1 | 1168 | } |
duke@1 | 1169 | |
duke@1 | 1170 | /** Does this symbol override `other' symbol, when both are seen as |
duke@1 | 1171 | * members of class `origin'? It is assumed that _other is a member |
duke@1 | 1172 | * of origin. |
duke@1 | 1173 | * |
duke@1 | 1174 | * It is assumed that both symbols have the same name. The static |
duke@1 | 1175 | * modifier is ignored for this test. |
duke@1 | 1176 | * |
duke@1 | 1177 | * See JLS 8.4.6.1 (without transitivity) and 8.4.6.4 |
duke@1 | 1178 | */ |
duke@1 | 1179 | public boolean overrides(Symbol _other, TypeSymbol origin, Types types, boolean checkResult) { |
duke@1 | 1180 | if (isConstructor() || _other.kind != MTH) return false; |
duke@1 | 1181 | |
duke@1 | 1182 | if (this == _other) return true; |
duke@1 | 1183 | MethodSymbol other = (MethodSymbol)_other; |
duke@1 | 1184 | |
duke@1 | 1185 | // check for a direct implementation |
duke@1 | 1186 | if (other.isOverridableIn((TypeSymbol)owner) && |
duke@1 | 1187 | types.asSuper(owner.type, other.owner) != null) { |
duke@1 | 1188 | Type mt = types.memberType(owner.type, this); |
duke@1 | 1189 | Type ot = types.memberType(owner.type, other); |
duke@1 | 1190 | if (types.isSubSignature(mt, ot)) { |
duke@1 | 1191 | if (!checkResult) |
duke@1 | 1192 | return true; |
duke@1 | 1193 | if (types.returnTypeSubstitutable(mt, ot)) |
duke@1 | 1194 | return true; |
duke@1 | 1195 | } |
duke@1 | 1196 | } |
duke@1 | 1197 | |
duke@1 | 1198 | // check for an inherited implementation |
duke@1 | 1199 | if ((flags() & ABSTRACT) != 0 || |
duke@1 | 1200 | (other.flags() & ABSTRACT) == 0 || |
duke@1 | 1201 | !other.isOverridableIn(origin) || |
duke@1 | 1202 | !this.isMemberOf(origin, types)) |
duke@1 | 1203 | return false; |
duke@1 | 1204 | |
duke@1 | 1205 | // assert types.asSuper(origin.type, other.owner) != null; |
duke@1 | 1206 | Type mt = types.memberType(origin.type, this); |
duke@1 | 1207 | Type ot = types.memberType(origin.type, other); |
duke@1 | 1208 | return |
duke@1 | 1209 | types.isSubSignature(mt, ot) && |
duke@1 | 1210 | (!checkResult || types.resultSubtype(mt, ot, Warner.noWarnings)); |
duke@1 | 1211 | } |
duke@1 | 1212 | |
duke@1 | 1213 | private boolean isOverridableIn(TypeSymbol origin) { |
duke@1 | 1214 | // JLS3 8.4.6.1 |
duke@1 | 1215 | switch ((int)(flags_field & Flags.AccessFlags)) { |
duke@1 | 1216 | case Flags.PRIVATE: |
duke@1 | 1217 | return false; |
duke@1 | 1218 | case Flags.PUBLIC: |
duke@1 | 1219 | return true; |
duke@1 | 1220 | case Flags.PROTECTED: |
duke@1 | 1221 | return (origin.flags() & INTERFACE) == 0; |
duke@1 | 1222 | case 0: |
duke@1 | 1223 | // for package private: can only override in the same |
duke@1 | 1224 | // package |
duke@1 | 1225 | return |
duke@1 | 1226 | this.packge() == origin.packge() && |
duke@1 | 1227 | (origin.flags() & INTERFACE) == 0; |
duke@1 | 1228 | default: |
duke@1 | 1229 | return false; |
duke@1 | 1230 | } |
duke@1 | 1231 | } |
duke@1 | 1232 | |
duke@1 | 1233 | /** The implementation of this (abstract) symbol in class origin; |
duke@1 | 1234 | * null if none exists. Synthetic methods are not considered |
duke@1 | 1235 | * as possible implementations. |
duke@1 | 1236 | */ |
duke@1 | 1237 | public MethodSymbol implementation(TypeSymbol origin, Types types, boolean checkResult) { |
mcimadamore@673 | 1238 | return implementation(origin, types, checkResult, implementation_filter); |
mcimadamore@673 | 1239 | } |
mcimadamore@673 | 1240 | // where |
mcimadamore@673 | 1241 | private static final Filter<Symbol> implementation_filter = new Filter<Symbol>() { |
mcimadamore@673 | 1242 | public boolean accepts(Symbol s) { |
mcimadamore@673 | 1243 | return s.kind == Kinds.MTH && |
mcimadamore@673 | 1244 | (s.flags() & SYNTHETIC) == 0; |
mcimadamore@673 | 1245 | } |
mcimadamore@673 | 1246 | }; |
mcimadamore@673 | 1247 | |
mcimadamore@673 | 1248 | public MethodSymbol implementation(TypeSymbol origin, Types types, boolean checkResult, Filter<Symbol> implFilter) { |
mcimadamore@673 | 1249 | MethodSymbol res = types.implementation(this, origin, types, checkResult, implFilter); |
mcimadamore@341 | 1250 | if (res != null) |
mcimadamore@341 | 1251 | return res; |
duke@1 | 1252 | // if origin is derived from a raw type, we might have missed |
duke@1 | 1253 | // an implementation because we do not know enough about instantiations. |
duke@1 | 1254 | // in this case continue with the supertype as origin. |
duke@1 | 1255 | if (types.isDerivedRaw(origin.type)) |
duke@1 | 1256 | return implementation(types.supertype(origin.type).tsym, types, checkResult); |
duke@1 | 1257 | else |
duke@1 | 1258 | return null; |
duke@1 | 1259 | } |
duke@1 | 1260 | |
duke@1 | 1261 | public List<VarSymbol> params() { |
duke@1 | 1262 | owner.complete(); |
duke@1 | 1263 | if (params == null) { |
jjg@428 | 1264 | // If ClassReader.saveParameterNames has been set true, then |
jjg@428 | 1265 | // savedParameterNames will be set to a list of names that |
jjg@428 | 1266 | // matches the types in type.getParameterTypes(). If any names |
jjg@428 | 1267 | // were not found in the class file, those names in the list will |
jjg@428 | 1268 | // be set to the empty name. |
jjg@428 | 1269 | // If ClassReader.saveParameterNames has been set false, then |
jjg@428 | 1270 | // savedParameterNames will be null. |
jjg@428 | 1271 | List<Name> paramNames = savedParameterNames; |
duke@1 | 1272 | savedParameterNames = null; |
jjg@428 | 1273 | // discard the provided names if the list of names is the wrong size. |
jjg@428 | 1274 | if (paramNames == null || paramNames.size() != type.getParameterTypes().size()) |
jjg@428 | 1275 | paramNames = List.nil(); |
duke@1 | 1276 | ListBuffer<VarSymbol> buf = new ListBuffer<VarSymbol>(); |
jjg@428 | 1277 | List<Name> remaining = paramNames; |
jjg@428 | 1278 | // assert: remaining and paramNames are both empty or both |
jjg@428 | 1279 | // have same cardinality as type.getParameterTypes() |
jjg@428 | 1280 | int i = 0; |
duke@1 | 1281 | for (Type t : type.getParameterTypes()) { |
jjg@428 | 1282 | Name paramName; |
jjg@428 | 1283 | if (remaining.isEmpty()) { |
jjg@428 | 1284 | // no names for any parameters available |
jjg@428 | 1285 | paramName = createArgName(i, paramNames); |
jjg@428 | 1286 | } else { |
jjg@428 | 1287 | paramName = remaining.head; |
jjg@428 | 1288 | remaining = remaining.tail; |
jjg@428 | 1289 | if (paramName.isEmpty()) { |
jjg@428 | 1290 | // no name for this specific parameter |
jjg@428 | 1291 | paramName = createArgName(i, paramNames); |
jjg@428 | 1292 | } |
jjg@428 | 1293 | } |
jjg@428 | 1294 | buf.append(new VarSymbol(PARAMETER, paramName, t, this)); |
jjg@428 | 1295 | i++; |
duke@1 | 1296 | } |
duke@1 | 1297 | params = buf.toList(); |
duke@1 | 1298 | } |
duke@1 | 1299 | return params; |
duke@1 | 1300 | } |
duke@1 | 1301 | |
jjg@428 | 1302 | // Create a name for the argument at position 'index' that is not in |
jjg@428 | 1303 | // the exclude list. In normal use, either no names will have been |
jjg@428 | 1304 | // provided, in which case the exclude list is empty, or all the names |
jjg@428 | 1305 | // will have been provided, in which case this method will not be called. |
jjg@428 | 1306 | private Name createArgName(int index, List<Name> exclude) { |
jjg@428 | 1307 | String prefix = "arg"; |
jjg@428 | 1308 | while (true) { |
jjg@428 | 1309 | Name argName = name.table.fromString(prefix + index); |
jjg@428 | 1310 | if (!exclude.contains(argName)) |
jjg@428 | 1311 | return argName; |
jjg@428 | 1312 | prefix += "$"; |
jjg@428 | 1313 | } |
jjg@428 | 1314 | } |
jjg@428 | 1315 | |
duke@1 | 1316 | public Symbol asMemberOf(Type site, Types types) { |
duke@1 | 1317 | return new MethodSymbol(flags_field, name, types.memberType(site, this), owner); |
duke@1 | 1318 | } |
duke@1 | 1319 | |
duke@1 | 1320 | public ElementKind getKind() { |
jjg@113 | 1321 | if (name == name.table.names.init) |
duke@1 | 1322 | return ElementKind.CONSTRUCTOR; |
jjg@113 | 1323 | else if (name == name.table.names.clinit) |
duke@1 | 1324 | return ElementKind.STATIC_INIT; |
duke@1 | 1325 | else |
duke@1 | 1326 | return ElementKind.METHOD; |
duke@1 | 1327 | } |
duke@1 | 1328 | |
duke@1 | 1329 | public Attribute getDefaultValue() { |
duke@1 | 1330 | return defaultValue; |
duke@1 | 1331 | } |
duke@1 | 1332 | |
duke@1 | 1333 | public List<VarSymbol> getParameters() { |
duke@1 | 1334 | return params(); |
duke@1 | 1335 | } |
duke@1 | 1336 | |
duke@1 | 1337 | public boolean isVarArgs() { |
duke@1 | 1338 | return (flags() & VARARGS) != 0; |
duke@1 | 1339 | } |
duke@1 | 1340 | |
duke@1 | 1341 | public <R, P> R accept(ElementVisitor<R, P> v, P p) { |
duke@1 | 1342 | return v.visitExecutable(this, p); |
duke@1 | 1343 | } |
duke@1 | 1344 | |
mcimadamore@121 | 1345 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 1346 | return v.visitMethodSymbol(this, p); |
mcimadamore@121 | 1347 | } |
mcimadamore@121 | 1348 | |
duke@1 | 1349 | public Type getReturnType() { |
duke@1 | 1350 | return asType().getReturnType(); |
duke@1 | 1351 | } |
duke@1 | 1352 | |
duke@1 | 1353 | public List<Type> getThrownTypes() { |
duke@1 | 1354 | return asType().getThrownTypes(); |
duke@1 | 1355 | } |
duke@1 | 1356 | } |
duke@1 | 1357 | |
duke@1 | 1358 | /** A class for predefined operators. |
duke@1 | 1359 | */ |
duke@1 | 1360 | public static class OperatorSymbol extends MethodSymbol { |
duke@1 | 1361 | |
duke@1 | 1362 | public int opcode; |
duke@1 | 1363 | |
duke@1 | 1364 | public OperatorSymbol(Name name, Type type, int opcode, Symbol owner) { |
duke@1 | 1365 | super(PUBLIC | STATIC, name, type, owner); |
duke@1 | 1366 | this.opcode = opcode; |
duke@1 | 1367 | } |
mcimadamore@121 | 1368 | |
mcimadamore@121 | 1369 | public <R, P> R accept(Symbol.Visitor<R, P> v, P p) { |
mcimadamore@121 | 1370 | return v.visitOperatorSymbol(this, p); |
mcimadamore@121 | 1371 | } |
duke@1 | 1372 | } |
duke@1 | 1373 | |
duke@1 | 1374 | /** Symbol completer interface. |
duke@1 | 1375 | */ |
duke@1 | 1376 | public static interface Completer { |
duke@1 | 1377 | void complete(Symbol sym) throws CompletionFailure; |
duke@1 | 1378 | } |
duke@1 | 1379 | |
duke@1 | 1380 | public static class CompletionFailure extends RuntimeException { |
duke@1 | 1381 | private static final long serialVersionUID = 0; |
duke@1 | 1382 | public Symbol sym; |
duke@1 | 1383 | |
jjg@12 | 1384 | /** A diagnostic object describing the failure |
jjg@12 | 1385 | */ |
jjg@12 | 1386 | public JCDiagnostic diag; |
jjg@12 | 1387 | |
duke@1 | 1388 | /** A localized string describing the failure. |
jjg@12 | 1389 | * @deprecated Use {@code getDetail()} or {@code getMessage()} |
duke@1 | 1390 | */ |
jjg@12 | 1391 | @Deprecated |
duke@1 | 1392 | public String errmsg; |
duke@1 | 1393 | |
duke@1 | 1394 | public CompletionFailure(Symbol sym, String errmsg) { |
duke@1 | 1395 | this.sym = sym; |
duke@1 | 1396 | this.errmsg = errmsg; |
duke@1 | 1397 | // this.printStackTrace();//DEBUG |
duke@1 | 1398 | } |
duke@1 | 1399 | |
jjg@12 | 1400 | public CompletionFailure(Symbol sym, JCDiagnostic diag) { |
jjg@12 | 1401 | this.sym = sym; |
jjg@12 | 1402 | this.diag = diag; |
jjg@12 | 1403 | // this.printStackTrace();//DEBUG |
jjg@12 | 1404 | } |
jjg@12 | 1405 | |
jjg@12 | 1406 | public JCDiagnostic getDiagnostic() { |
jjg@12 | 1407 | return diag; |
jjg@12 | 1408 | } |
jjg@12 | 1409 | |
jjg@12 | 1410 | @Override |
duke@1 | 1411 | public String getMessage() { |
jjg@12 | 1412 | if (diag != null) |
jjg@12 | 1413 | return diag.getMessage(null); |
jjg@12 | 1414 | else |
jjg@12 | 1415 | return errmsg; |
jjg@12 | 1416 | } |
jjg@12 | 1417 | |
jjg@12 | 1418 | public Object getDetailValue() { |
jjg@12 | 1419 | return (diag != null ? diag : errmsg); |
duke@1 | 1420 | } |
duke@1 | 1421 | |
duke@1 | 1422 | @Override |
duke@1 | 1423 | public CompletionFailure initCause(Throwable cause) { |
duke@1 | 1424 | super.initCause(cause); |
duke@1 | 1425 | return this; |
duke@1 | 1426 | } |
duke@1 | 1427 | |
duke@1 | 1428 | } |
mcimadamore@121 | 1429 | |
mcimadamore@121 | 1430 | /** |
mcimadamore@121 | 1431 | * A visitor for symbols. A visitor is used to implement operations |
mcimadamore@121 | 1432 | * (or relations) on symbols. Most common operations on types are |
mcimadamore@121 | 1433 | * binary relations and this interface is designed for binary |
mcimadamore@121 | 1434 | * relations, that is, operations on the form |
mcimadamore@121 | 1435 | * Symbol × P → R. |
mcimadamore@121 | 1436 | * <!-- In plain text: Type x P -> R --> |
mcimadamore@121 | 1437 | * |
mcimadamore@121 | 1438 | * @param <R> the return type of the operation implemented by this |
mcimadamore@121 | 1439 | * visitor; use Void if no return type is needed. |
mcimadamore@121 | 1440 | * @param <P> the type of the second argument (the first being the |
mcimadamore@121 | 1441 | * symbol itself) of the operation implemented by this visitor; use |
mcimadamore@121 | 1442 | * Void if a second argument is not needed. |
mcimadamore@121 | 1443 | */ |
mcimadamore@121 | 1444 | public interface Visitor<R,P> { |
mcimadamore@121 | 1445 | R visitClassSymbol(ClassSymbol s, P arg); |
mcimadamore@121 | 1446 | R visitMethodSymbol(MethodSymbol s, P arg); |
mcimadamore@121 | 1447 | R visitPackageSymbol(PackageSymbol s, P arg); |
mcimadamore@121 | 1448 | R visitOperatorSymbol(OperatorSymbol s, P arg); |
mcimadamore@121 | 1449 | R visitVarSymbol(VarSymbol s, P arg); |
mcimadamore@121 | 1450 | R visitTypeSymbol(TypeSymbol s, P arg); |
mcimadamore@121 | 1451 | R visitSymbol(Symbol s, P arg); |
mcimadamore@121 | 1452 | } |
duke@1 | 1453 | } |