1 /*
2 * Copyright 2003 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 sun.reflect.generics.repository;
27
28
29 import java.lang.reflect.Type;
30 import sun.reflect.generics.factory.GenericsFactory;
31 import sun.reflect.generics.visitor.Reifier;
32
33
34
35 /**
36 * This class represents the generic type information for a method.
37 * The code is not dependent on a particular reflective implementation.
38 * It is designed to be used unchanged by at least core reflection and JDI.
39 */
40 public class MethodRepository extends ConstructorRepository {
41
42 private Type returnType; // caches the generic return type info
43
44 // private, to enforce use of static factory
45 private MethodRepository(String rawSig, GenericsFactory f) {
46 super(rawSig, f);
47 }
48
49 /**
50 * Static factory method.
51 * @param rawSig - the generic signature of the reflective object
52 * that this repository is servicing
53 * @param f - a factory that will provide instances of reflective
54 * objects when this repository converts its AST
55 * @return a <tt>MethodRepository</tt> that manages the generic type
56 * information represented in the signature <tt>rawSig</tt>
57 */
58 public static MethodRepository make(String rawSig, GenericsFactory f) {
59 return new MethodRepository(rawSig, f);
60 }
61
62 // public API
63
64 public Type getReturnType() {
65 if (returnType == null) { // lazily initialize return type
66 Reifier r = getReifier(); // obtain visitor
67 // Extract return type subtree from AST and reify
68 getTree().getReturnType().accept(r);
69 // extract result from visitor and cache it
70 returnType = r.getResult();
71 }
72 return returnType; // return cached result
73 }
74
75
76 }
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