langtools/src/share/classes/com/sun/tools/apt/mirror/AptEnv.java
changeset 11914 d1311b0c757f
parent 11913 be61e1597cc6
parent 11872 c51754cddc03
child 11915 33f703959597
child 11986 6f383069eb6d
equal deleted inserted replaced
11913:be61e1597cc6 11914:d1311b0c757f
     1 /*
       
     2  * Copyright (c) 2004, 2008, 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.apt.mirror;
       
    27 
       
    28 
       
    29 import com.sun.tools.apt.mirror.declaration.DeclarationMaker;
       
    30 import com.sun.tools.apt.mirror.type.TypeMaker;
       
    31 import com.sun.tools.javac.code.*;
       
    32 import com.sun.tools.javac.code.Symbol.CompletionFailure;
       
    33 import com.sun.tools.javac.comp.Attr;
       
    34 import com.sun.tools.javac.comp.Enter;
       
    35 import com.sun.tools.javac.util.Context;
       
    36 import com.sun.tools.javac.util.Names;
       
    37 
       
    38 
       
    39 /**
       
    40  * The environment for a run of apt.
       
    41  */
       
    42 @SuppressWarnings("deprecation")
       
    43 public class AptEnv {
       
    44 
       
    45     public Names names;                 // javac's name table
       
    46     public Symtab symtab;               // javac's predefined symbols
       
    47     public Types jctypes;               // javac's type utilities
       
    48     public Enter enter;                 // javac's enter phase
       
    49     public Attr attr;                   // javac's attr phase (to evaluate
       
    50                                         //   constant initializers)
       
    51     public TypeMaker typeMaker;         // apt's internal type utilities
       
    52     public DeclarationMaker declMaker;  // apt's internal declaration utilities
       
    53 
       
    54 
       
    55     private static final Context.Key<AptEnv> aptEnvKey =
       
    56             new Context.Key<AptEnv>();
       
    57 
       
    58     public static AptEnv instance(Context context) {
       
    59         AptEnv instance = context.get(aptEnvKey);
       
    60         if (instance == null) {
       
    61             instance = new AptEnv(context);
       
    62         }
       
    63         return instance;
       
    64     }
       
    65 
       
    66     private AptEnv(Context context) {
       
    67         context.put(aptEnvKey, this);
       
    68 
       
    69         names = Names.instance(context);
       
    70         symtab = Symtab.instance(context);
       
    71         jctypes = Types.instance(context);
       
    72         enter = Enter.instance(context);
       
    73         attr = Attr.instance(context);
       
    74         typeMaker = TypeMaker.instance(context);
       
    75         declMaker = DeclarationMaker.instance(context);
       
    76     }
       
    77 
       
    78 
       
    79     /**
       
    80      * Does a symbol have a given flag?  Forces symbol completion.
       
    81      */
       
    82     public static boolean hasFlag(Symbol sym, long flag) {
       
    83         return (getFlags(sym) & flag) != 0;
       
    84     }
       
    85 
       
    86     /**
       
    87      * Returns a symbol's flags.  Forces completion.
       
    88      */
       
    89     public static long getFlags(Symbol sym) {
       
    90         complete(sym);
       
    91         return sym.flags();
       
    92     }
       
    93 
       
    94     /**
       
    95      * Completes a symbol, ignoring completion failures.
       
    96      */
       
    97     private static void complete(Symbol sym) {
       
    98         while (true) {
       
    99             try {
       
   100                 sym.complete();
       
   101                 return;
       
   102             } catch (CompletionFailure e) {
       
   103                 // Should never see two in a row, but loop just to be sure.
       
   104             }
       
   105         }
       
   106     }
       
   107 }