1 /* 2 * Copyright (c) 2003, 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.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 /** The generic return type info. Lazily initialized. */ 43 private volatile Type returnType; 44 45 // private, to enforce use of static factory 46 private MethodRepository(String rawSig, GenericsFactory f) { 47 super(rawSig, f); 48 } 49 50 /** 51 * Static factory method. 52 * @param rawSig - the generic signature of the reflective object 53 * that this repository is servicing 54 * @param f - a factory that will provide instances of reflective 55 * objects when this repository converts its AST 56 * @return a <tt>MethodRepository</tt> that manages the generic type 57 * information represented in the signature <tt>rawSig</tt> 58 */ 59 public static MethodRepository make(String rawSig, GenericsFactory f) { 60 return new MethodRepository(rawSig, f); 61 } 62 63 public Type getReturnType() { 64 Type value = returnType; 65 if (value == null) { 66 value = computeReturnType(); 67 returnType = value; 68 } 69 return value; 70 } 71 72 private Type computeReturnType() { 73 Reifier r = getReifier(); // obtain visitor 74 // Extract return type subtree from AST and reify 75 getTree().getReturnType().accept(r); 76 // extract result from visitor and cache it 77 return r.getResult(); 78 } 79 80 }