jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/comp/TypeEnvs.java@f4df97bf5392

8059921: Missing compile error in Java 8 mode for Interface.super.field access
Reviewed-by: mcimadamore, jlahoda

     1 /*

     2  * Copyright (c) 2014, 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  */

    26 package com.sun.tools.javac.comp;

    28 import java.util.Collection;

    29 import java.util.HashMap;

    30 import com.sun.tools.javac.code.Symbol.TypeSymbol;

    31 import com.sun.tools.javac.util.Context;

    33 /** This class contains the type environments used by Enter, MemberEnter,

    34  *  Attr, DeferredAttr, and Lower.

    35  *

    36  *  <p><b>This is NOT part of any supported API.

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

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

    39  *  deletion without notice.</b>

    40  */

    41 class TypeEnvs {

    42     private static final long serialVersionUID = 571524752489954631L;

    44     protected static final Context.Key<TypeEnvs> typeEnvsKey = new Context.Key<>();

    45     public static TypeEnvs instance(Context context) {

    46         TypeEnvs instance = context.get(typeEnvsKey);

    47         if (instance == null)

    48             instance = new TypeEnvs(context);

    49         return instance;

    50     }

    52     private HashMap<TypeSymbol,Env<AttrContext>> map;

    53     protected TypeEnvs(Context context) {

    54         map = new HashMap<>();

    55         context.put(typeEnvsKey, this);

    56     }

    58     Env<AttrContext> get(TypeSymbol sym) { return map.get(sym); }

    59     Env<AttrContext> put(TypeSymbol sym, Env<AttrContext> env) { return map.put(sym, env); }

    60     Env<AttrContext> remove(TypeSymbol sym) { return map.remove(sym); }

    61     Collection<Env<AttrContext>> values() { return map.values(); }

    62     void clear() { map.clear(); }

    63 }

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