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
26package sun.reflect.generics.scope;
27
28import java.lang.reflect.Constructor;
29import java.lang.reflect.Method;
30
31
32/**
33 * This class represents the scope containing the type variables of
34 * a class.
35 */
36public 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 {@code Class} 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}
84