author | chegar |
Sun, 17 Aug 2014 15:54:13 +0100 | |
changeset 25859 | 3317bb8137f4 |
parent 20110 | jdk/src/share/classes/java/beans/MethodRef.java@85b98c3054f6 |
child 40441 | 648e8ee9cf8c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2013, 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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|
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package java.beans; |
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|
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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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|
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import static sun.reflect.misc.ReflectUtil.isPackageAccessible; |
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|
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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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|
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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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|
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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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} |
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else { |
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this.methodRef = new SoftReference<>(method); |
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} |
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} |
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return isPackageAccessible(method.getDeclaringClass()) ? method : null; |
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} |
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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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} |