| /* |
| * Copyright (c) 2013, 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 java.beans; |
| |
| import java.lang.ref.SoftReference; |
| import java.lang.ref.WeakReference; |
| import java.lang.reflect.Method; |
| |
| import static sun.reflect.misc.ReflectUtil.isPackageAccessible; |
| |
| final class MethodRef { |
| private String signature; |
| private SoftReference<Method> methodRef; |
| private WeakReference<Class<?>> typeRef; |
| |
| void set(Method method) { |
| if (method == null) { |
| this.signature = null; |
| this.methodRef = null; |
| this.typeRef = null; |
| } |
| else { |
| this.signature = method.toGenericString(); |
| this.methodRef = new SoftReference<>(method); |
| this.typeRef = new WeakReference<Class<?>>(method.getDeclaringClass()); |
| } |
| } |
| |
| boolean isSet() { |
| return this.methodRef != null; |
| } |
| |
| Method get() { |
| if (this.methodRef == null) { |
| return null; |
| } |
| Method method = this.methodRef.get(); |
| if (method == null) { |
| method = find(this.typeRef.get(), this.signature); |
| if (method == null) { |
| this.signature = null; |
| this.methodRef = null; |
| this.typeRef = null; |
| } |
| else { |
| this.methodRef = new SoftReference<>(method); |
| } |
| } |
| return isPackageAccessible(method.getDeclaringClass()) ? method : null; |
| } |
| |
| private static Method find(Class<?> type, String signature) { |
| if (type != null) { |
| for (Method method : type.getMethods()) { |
| if (type.equals(method.getDeclaringClass())) { |
| if (method.toGenericString().equals(signature)) { |
| return method; |
| } |
| } |
| } |
| } |
| return null; |
| } |
| } |