1 /*

     2  * Copyright 2006 Sun Microsystems, Inc.  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.  Sun designates this

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

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

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

    23  * have any questions.

    24  */

    25 

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

    27 

    28 import java.io.IOException;

    29 import java.lang.ref.SoftReference;

    30 import java.util.Iterator;

    31 

    32 import javax.lang.model.element.Element;

    33 import javax.lang.model.element.ExecutableElement;

    34 import javax.lang.model.element.TypeElement;

    35 import javax.tools.JavaFileObject;

    36 

    37 import com.sun.source.tree.Tree;

    38 import com.sun.source.util.SourcePositions;

    39 import com.sun.source.util.TreePath;

    40 import com.sun.source.util.Trees;

    41 import com.sun.tools.javac.code.Scope;

    42 import com.sun.tools.javac.code.Symbol.ClassSymbol;

    43 import com.sun.tools.javac.comp.Attr;

    44 import com.sun.tools.javac.comp.AttrContext;

    45 import com.sun.tools.javac.comp.Enter;

    46 import com.sun.tools.javac.comp.Env;

    47 import com.sun.tools.javac.comp.MemberEnter;

    48 import com.sun.tools.javac.comp.Resolve;

    49 import com.sun.tools.javac.tree.JCTree.JCClassDecl;

    50 import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;

    51 import com.sun.tools.javac.tree.JCTree.JCExpression;

    52 import com.sun.tools.javac.tree.JCTree.JCMethodDecl;

    53 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;

    54 import com.sun.tools.javac.tree.JCTree;

    55 import com.sun.tools.javac.tree.TreeCopier;

    56 import com.sun.tools.javac.tree.TreeInfo;

    57 import com.sun.tools.javac.tree.TreeMaker;

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

    59 import com.sun.tools.javac.util.List;

    60 import com.sun.tools.javac.util.Log;

    61 

    62 import static com.sun.source.tree.Tree.Kind.*;

    63 

    64 

    65 /**

    66  * Provides an implementation of Scope.

    67  *

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

    69  * If you write code that depends on this, you do so at your own

    70  * risk.  This code and its internal interfaces are subject to change

    71  * or deletion without notice.</b></p>

    72  *

    73  * @author Jonathan Gibbons;

    74  */

    75 public class JavacScope implements com.sun.source.tree.Scope {

    76     protected final Env<AttrContext> env;

    77 

    78     /** Creates a new instance of JavacScope */

    79     JavacScope(Env<AttrContext> env) {

    80         env.getClass(); // null-check

    81         this.env = env;

    82     }

    83 

    84     public JavacScope getEnclosingScope() {

    85         if (env.outer != null && env.outer != env)

    86             return  new JavacScope(env.outer);

    87         else {

    88             // synthesize an outermost "star-import" scope

    89             return new JavacScope(env) {

    90                 public boolean isStarImportScope() {

    91                     return true;

    92                 }

    93                 public JavacScope getEnclosingScope() {

    94                     return null;

    95                 }

    96                 public Iterable<? extends Element> getLocalElements() {

    97                     return env.toplevel.starImportScope.getElements();

    98                 }

    99             };

   100         }

   101     }

   102 

   103     public TypeElement getEnclosingClass() {

   104         // hide the dummy class that javac uses to enclose the top level declarations

   105         return (env.outer == null || env.outer == env ? null : env.enclClass.sym);

   106     }

   107 

   108     public ExecutableElement getEnclosingMethod() {

   109         return (env.enclMethod == null ? null : env.enclMethod.sym);

   110     }

   111 

   112     public Iterable<? extends Element> getLocalElements() {

   113         return env.info.getLocalElements();

   114     }

   115 

   116     public Env<AttrContext> getEnv() {

   117         return env;

   118     }

   119 

   120     public boolean isStarImportScope() {

   121         return false;

   122     }

   123 

   124     public boolean equals(Object other) {

   125         if (other instanceof JavacScope) {

   126             JavacScope s = (JavacScope) other;

   127             return (env.equals(s.env)

   128                 && isStarImportScope() == s.isStarImportScope());

   129         } else

   130             return false;

   131     }

   132 

   133     public int hashCode() {

   134         return env.hashCode() + (isStarImportScope() ? 1 : 0);

   135     }

   136 

   137     public String toString() {

   138         return "JavacScope[env=" + env + ",starImport=" + isStarImportScope() + "]";

   139     }

   140 }