Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright 1999-2008 Sun Microsystems, Inc.  All Rights Reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Sun designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Sun in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

  * CA 95054 USA or visit www.sun.com if you need additional information or

  * have any questions.

  */

 package com.sun.tools.javac.code;

 import java.util.EnumSet;

 import java.util.Locale;

 import com.sun.tools.javac.api.Formattable;

 import com.sun.tools.javac.api.Messages;

 import static com.sun.tools.javac.code.TypeTags.*;

 import static com.sun.tools.javac.code.Flags.*;

 /** Internal symbol kinds, which distinguish between elements of

  *  different subclasses of Symbol. Symbol kinds are organized so they can be

  *  or'ed to sets.

  *

  *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If

  *  you write code that depends on this, you do so at your own risk.

  *  This code and its internal interfaces are subject to change or

  *  deletion without notice.</b>

  */

 public class Kinds {

     private Kinds() {} // uninstantiable

     /** The empty set of kinds.

      */

     public final static int NIL = 0;

     /** The kind of package symbols.

      */

     public final static int PCK = 1 << 0;

     /** The kind of type symbols (classes, interfaces and type variables).

      */

     public final static int TYP = 1 << 1;

     /** The kind of variable symbols.

      */

     public final static int VAR = 1 << 2;

     /** The kind of values (variables or non-variable expressions), includes VAR.

      */

     public final static int VAL = (1 << 3) | VAR;

     /** The kind of methods.

      */

     public final static int MTH = 1 << 4;

     /** The error kind, which includes all other kinds.

      */

     public final static int ERR = (1 << 5) - 1;

     /** The set of all kinds.

      */

     public final static int AllKinds = ERR;

     /** Kinds for erroneous symbols that complement the above

      */

     public static final int ERRONEOUS = 1 << 6;

     public static final int AMBIGUOUS    = ERRONEOUS+1; // ambiguous reference

     public static final int HIDDEN       = ERRONEOUS+2; // hidden method or field

     public static final int STATICERR    = ERRONEOUS+3; // nonstatic member from static context

     public static final int ABSENT_VAR   = ERRONEOUS+4; // missing variable

     public static final int WRONG_MTHS   = ERRONEOUS+5; // methods with wrong arguments

     public static final int WRONG_MTH    = ERRONEOUS+6; // one method with wrong arguments

     public static final int ABSENT_MTH   = ERRONEOUS+7; // missing method

     public static final int ABSENT_TYP   = ERRONEOUS+8; // missing type

     public enum KindName implements Formattable {

         ANNOTATION("kindname.interface"),

         CONSTRUCTOR("kindname.constructor"),

         INTERFACE("kindname.interface"),

         STATIC("kindname.static"),

         TYPEVAR("kindname.type.variable"),

         BOUND("kindname.type.variable.bound"),

         VAR("kindname.variable"),

         VAL("kindname.value"),

         METHOD("kindname.method"),

         CLASS("kindname.class"),

         PACKAGE("kindname.package");

         private String name;

         KindName(String name) {

             this.name = name;

         }

         public String toString() {

             return name;

         }

         public String getKind() {

             return "Kindname";

         }

         public String toString(Locale locale, Messages messages) {

             String s = toString();

             return messages.getLocalizedString(locale, "compiler.misc." + s);

         }

     }

     /** A KindName representing a given symbol kind

      */

     public static KindName kindName(int kind) {

         switch (kind) {

         case PCK: return KindName.PACKAGE;

         case TYP: return KindName.CLASS;

         case VAR: return KindName.VAR;

         case VAL: return KindName.VAL;

         case MTH: return KindName.METHOD;

             default : throw new AssertionError("Unexpected kind: "+kind);

         }

     }

     /** A KindName representing a given symbol

      */

     public static KindName kindName(Symbol sym) {

         switch (sym.getKind()) {

         case PACKAGE:

             return KindName.PACKAGE;

         case ENUM:

         case ANNOTATION_TYPE:

         case INTERFACE:

         case CLASS:

             return KindName.CLASS;

         case TYPE_PARAMETER:

             return KindName.TYPEVAR;

         case ENUM_CONSTANT:

         case FIELD:

         case PARAMETER:

         case LOCAL_VARIABLE:

         case EXCEPTION_PARAMETER:

             return KindName.VAR;

         case METHOD:

         case CONSTRUCTOR:

         case STATIC_INIT:

         case INSTANCE_INIT:

             return KindName.METHOD;

         default:

             if (sym.kind == VAL)

                 // I don't think this can happen but it can't harm

                 // playing it safe --ahe

                 return KindName.VAL;

             else

                 throw new AssertionError("Unexpected kind: "+sym.getKind());

         }

     }

     /** A set of KindName(s) representing a set of symbol's kinds.

      */

     public static EnumSet<KindName> kindNames(int kind) {

         EnumSet<KindName> kinds = EnumSet.noneOf(KindName.class);

         if ((kind & VAL) != 0)

             kinds.add(((kind & VAL) == VAR) ? KindName.VAR : KindName.VAL);

         if ((kind & MTH) != 0) kinds.add(KindName.METHOD);

         if ((kind & TYP) != 0) kinds.add(KindName.CLASS);

         if ((kind & PCK) != 0) kinds.add(KindName.PACKAGE);

         return kinds;

     }

     /** A KindName representing the kind of a given class/interface type.

      */

     public static KindName typeKindName(Type t) {

         if (t.tag == TYPEVAR ||

             t.tag == CLASS && (t.tsym.flags() & COMPOUND) != 0)

             return KindName.BOUND;

         else if (t.tag == PACKAGE)

             return KindName.PACKAGE;

         else if ((t.tsym.flags_field & ANNOTATION) != 0)

             return KindName.ANNOTATION;

         else if ((t.tsym.flags_field & INTERFACE) != 0)

             return KindName.INTERFACE;

         else

             return KindName.CLASS;

     }

     /** A KindName representing the kind of a a missing symbol, given an

      *  error kind.

      * */

     public static KindName absentKind(int kind) {

         switch (kind) {

         case ABSENT_VAR:

             return KindName.VAR;

         case WRONG_MTHS: case WRONG_MTH: case ABSENT_MTH:

             return KindName.METHOD;

         case ABSENT_TYP:

             return KindName.CLASS;

         default:

             throw new AssertionError("Unexpected kind: "+kind);

         }

     }

 }