Showing the changes to java/pkg/sun/reflect/generics/repository/ConstructorRepository.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,120 @@ | |||
| 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.repository; | ||
| 27 | |||
| 28 | import java.lang.reflect.Type; | ||
| 29 | import sun.reflect.generics.factory.GenericsFactory; | ||
| 30 | import sun.reflect.generics.parser.SignatureParser; | ||
| 31 | import sun.reflect.generics.tree.FieldTypeSignature; | ||
| 32 | import sun.reflect.generics.tree.MethodTypeSignature; | ||
| 33 | import sun.reflect.generics.tree.TypeSignature; | ||
| 34 | import sun.reflect.generics.visitor.Reifier; | ||
| 35 | |||
| 36 | |||
| 37 | |||
| 38 | /** | ||
| 39 | * This class represents the generic type information for a constructor. | ||
| 40 | * The code is not dependent on a particular reflective implementation. | ||
| 41 | * It is designed to be used unchanged by at least core reflection and JDI. | ||
| 42 | */ | ||
| 43 | public class ConstructorRepository | ||
| 44 | extends GenericDeclRepository<MethodTypeSignature> { | ||
| 45 | |||
| 46 | private Type[] paramTypes; // caches the generic parameter types info | ||
| 47 | private Type[] exceptionTypes; // caches the generic exception types info | ||
| 48 | |||
| 49 | // protected, to enforce use of static factory yet allow subclassing | ||
| 50 | protected ConstructorRepository(String rawSig, GenericsFactory f) { | ||
| 51 | super(rawSig, f); | ||
| 52 | } | ||
| 53 | |||
| 54 | protected MethodTypeSignature parse(String s) { | ||
| 55 | return SignatureParser.make().parseMethodSig(s); | ||
| 56 | } | ||
| 57 | |||
| 58 | /** | ||
| 59 | * Static factory method. | ||
| 60 | * @param rawSig - the generic signature of the reflective object | ||
| 61 | * that this repository is servicing | ||
| 62 | * @param f - a factory that will provide instances of reflective | ||
| 63 | * objects when this repository converts its AST | ||
| 64 | * @return a <tt>ConstructorRepository</tt> that manages the generic type | ||
| 65 | * information represented in the signature <tt>rawSig</tt> | ||
| 66 | */ | ||
| 67 | public static ConstructorRepository make(String rawSig, | ||
| 68 | GenericsFactory f) { | ||
| 69 | return new ConstructorRepository(rawSig, f); | ||
| 70 | } | ||
| 71 | |||
| 72 | // public API | ||
| 73 | |||
| 74 | /* | ||
| 75 | * When queried for a particular piece of type information, the | ||
| 76 | * general pattern is to consult the corresponding cached value. | ||
| 77 | * If the corresponding field is non-null, it is returned. | ||
| 78 | * If not, it is created lazily. This is done by selecting the appropriate | ||
| 79 | * part of the tree and transforming it into a reflective object | ||
| 80 | * using a visitor. | ||
| 81 | * a visitor, which is created by feeding it the factory | ||
| 82 | * with which the repository was created. | ||
| 83 | */ | ||
| 84 | |||
| 85 | public Type[] getParameterTypes(){ | ||
| 86 | if (paramTypes == null) { // lazily initialize parameter types | ||
| 87 | // first, extract parameter type subtree(s) from AST | ||
| 88 | TypeSignature[] pts = getTree().getParameterTypes(); | ||
| 89 | // create array to store reified subtree(s) | ||
| 90 | Type[] ps = new Type[pts.length]; | ||
| 91 | // reify all subtrees | ||
| 92 | for (int i = 0; i < pts.length; i++) { | ||
| 93 | Reifier r = getReifier(); // obtain visitor | ||
| 94 | pts[i].accept(r); // reify subtree | ||
| 95 | // extract result from visitor and store it | ||
| 96 | ps[i] = r.getResult(); | ||
| 97 | } | ||
| 98 | paramTypes = ps; // cache overall result | ||
| 99 | } | ||
| 100 | return paramTypes.clone(); // return cached result | ||
| 101 | } | ||
| 102 | |||
| 103 | public Type[] getExceptionTypes(){ | ||
| 104 | if (exceptionTypes == null) { // lazily initialize exception types | ||
| 105 | // first, extract exception type subtree(s) from AST | ||
| 106 | FieldTypeSignature[] ets = getTree().getExceptionTypes(); | ||
| 107 | // create array to store reified subtree(s) | ||
| 108 | Type[] es = new Type[ets.length]; | ||
| 109 | // reify all subtrees | ||
| 110 | for (int i = 0; i < ets.length; i++) { | ||
| 111 | Reifier r = getReifier(); // obtain visitor | ||
| 112 | ets[i].accept(r); // reify subtree | ||
| 113 | // extract result from visitor and store it | ||
| 114 | es[i] = r.getResult(); | ||
| 115 | } | ||
| 116 | exceptionTypes = es; // cache overall result | ||
| 117 | } | ||
| 118 | return exceptionTypes.clone(); // return cached result | ||
| 119 | } | ||
| 120 | } | ||