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    1   /*
    2    * Copyright (c) 2003, 2004, 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 sun.reflect.generics.scope;
   27   
   28   import java.lang.reflect.Constructor;
   29   import java.lang.reflect.Method;
   30   
   31   
   32   /**
   33    * This class represents the scope containing the type variables of
   34    * a class.
   35    */
   36   public class ClassScope extends AbstractScope<Class<?>> implements Scope {
   37   
   38       // constructor is private to enforce use of factory method
   39       private ClassScope(Class<?> c){
   40           super(c);
   41       }
   42   
   43       /**
   44        * Overrides the abstract method in the superclass.
   45        * @return the enclosing scope
   46        */
   47       protected Scope computeEnclosingScope() {
   48           Class<?> receiver = getRecvr();
   49   
   50           Method m = receiver.getEnclosingMethod();
   51           if (m != null)
   52               // Receiver is a local or anonymous class enclosed in a
   53               // method.
   54               return MethodScope.make(m);
   55   
   56           Constructor<?> cnstr = receiver.getEnclosingConstructor();
   57           if (cnstr != null)
   58               // Receiver is a local or anonymous class enclosed in a
   59               // constructor.
   60               return ConstructorScope.make(cnstr);
   61   
   62           Class<?> c = receiver.getEnclosingClass();
   63           // if there is a declaring class, recvr is a member class
   64           // and its enclosing scope is that of the declaring class
   65           if (c != null)
   66               // Receiver is a local class, an anonymous class, or a
   67               // member class (static or not).
   68               return ClassScope.make(c);
   69   
   70           // otherwise, recvr is a top level class, and it has no real
   71           // enclosing scope.
   72           return DummyScope.make();
   73       }
   74   
   75       /**
   76        * Factory method. Takes a <tt>Class</tt> object and creates a
   77        * scope for it.
   78        * @param c - a Class whose scope we want to obtain
   79        * @return The type-variable scope for the class c
   80        */
   81       public static ClassScope make(Class<?> c) { return new ClassScope(c);}
   82   
   83   }

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