74 lines
2.3 KiB
Java
74 lines
2.3 KiB
Java
/*
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* Copyright (c) 2001, 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.awt.dnd;
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import java.io.OutputStream;
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import java.io.ObjectOutputStream;
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import java.io.IOException;
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import java.io.Serializable;
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/**
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* Tests if an object can truly be serialized by serializing it to a null
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* OutputStream.
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*
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* @since 1.4
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*/
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final class SerializationTester {
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private static ObjectOutputStream stream;
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static {
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try {
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stream = new ObjectOutputStream(new OutputStream() {
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public void write(int b) {}
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});
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} catch (IOException cannotHappen) {
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}
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}
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static boolean test(Object obj) {
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if (!(obj instanceof Serializable)) {
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return false;
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}
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try {
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stream.writeObject(obj);
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} catch (IOException e) {
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return false;
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} finally {
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// Fix for 4503661.
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// Reset the stream so that it doesn't keep a reference to the
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// written object.
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try {
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stream.reset();
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} catch (IOException e) {
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// Ignore the exception.
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}
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}
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return true;
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}
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private SerializationTester() {}
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}
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