87 lines
2.9 KiB
Java
87 lines
2.9 KiB
Java
/*
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* Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.beans;
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import java.lang.ref.SoftReference;
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import java.lang.ref.WeakReference;
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import java.lang.reflect.Method;
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import static sun.reflect.misc.ReflectUtil.isPackageAccessible;
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final class MethodRef {
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private String signature;
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private SoftReference<Method> methodRef;
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private WeakReference<Class<?>> typeRef;
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void set(Method method) {
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if (method == null) {
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this.signature = null;
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this.methodRef = null;
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this.typeRef = null;
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}
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else {
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this.signature = method.toGenericString();
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this.methodRef = new SoftReference<>(method);
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this.typeRef = new WeakReference<Class<?>>(method.getDeclaringClass());
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}
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}
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boolean isSet() {
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return this.methodRef != null;
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}
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Method get() {
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if (this.methodRef == null) {
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return null;
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}
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Method method = this.methodRef.get();
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if (method == null) {
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method = find(this.typeRef.get(), this.signature);
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if (method == null) {
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this.signature = null;
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this.methodRef = null;
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this.typeRef = null;
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return null;
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}
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this.methodRef = new SoftReference<>(method);
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}
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return isPackageAccessible(method.getDeclaringClass()) ? method : null;
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}
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private static Method find(Class<?> type, String signature) {
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if (type != null) {
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for (Method method : type.getMethods()) {
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if (type.equals(method.getDeclaringClass())) {
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if (method.toGenericString().equals(signature)) {
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return method;
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}
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}
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}
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}
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return null;
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}
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}
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