| /* |
| * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.reflect.generics.repository; |
| |
| |
| import java.lang.reflect.Type; |
| import sun.reflect.generics.factory.GenericsFactory; |
| import sun.reflect.generics.tree.TypeSignature; |
| import sun.reflect.generics.parser.SignatureParser; |
| import sun.reflect.generics.visitor.Reifier; |
| |
| |
| |
| /** |
| * This class represents the generic type information for a constructor. |
| * The code is not dependent on a particular reflective implementation. |
| * It is designed to be used unchanged by at least core reflection and JDI. |
| */ |
| public class FieldRepository extends AbstractRepository<TypeSignature> { |
| |
| /** The generic type info. Lazily initialized. */ |
| private volatile Type genericType; |
| |
| // protected, to enforce use of static factory yet allow subclassing |
| protected FieldRepository(String rawSig, GenericsFactory f) { |
| super(rawSig, f); |
| } |
| |
| protected TypeSignature parse(String s) { |
| return SignatureParser.make().parseTypeSig(s); |
| } |
| |
| /** |
| * Static factory method. |
| * @param rawSig - the generic signature of the reflective object |
| * that this repository is servicing |
| * @param f - a factory that will provide instances of reflective |
| * objects when this repository converts its AST |
| * @return a {@code FieldRepository} that manages the generic type |
| * information represented in the signature {@code rawSig} |
| */ |
| public static FieldRepository make(String rawSig, GenericsFactory f) { |
| return new FieldRepository(rawSig, f); |
| } |
| |
| /* |
| * When queried for a particular piece of type information, the |
| * general pattern is to consult the corresponding cached value. |
| * If the corresponding field is non-null, it is returned. |
| * If not, it is created lazily. This is done by selecting the appropriate |
| * part of the tree and transforming it into a reflective object |
| * using a visitor, which is created by feeding it the factory |
| * with which the repository was created. |
| */ |
| |
| public Type getGenericType() { |
| Type value = genericType; |
| if (value == null) { |
| value = computeGenericType(); |
| genericType = value; |
| } |
| return value; |
| } |
| |
| private Type computeGenericType() { |
| Reifier r = getReifier(); // obtain visitor |
| getTree().accept(r); // reify subtree |
| return r.getResult(); // extract result from visitor |
| } |
| } |