128 lines
3.9 KiB
Java
128 lines
3.9 KiB
Java
/*
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* Copyright (c) 2001, 2019, 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.
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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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/* @test
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* @bug 4461737
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* @summary Verify that serialization functions properly for externalizable
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* classes if ObjectInputStream.readClassDescriptor() returns a local
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* class descriptor.
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*/
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import java.io.*;
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import java.util.*;
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class LoopbackOutputStream extends ObjectOutputStream {
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LinkedList<ObjectStreamClass> descs;
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LoopbackOutputStream(OutputStream out, LinkedList<ObjectStreamClass> descs)
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throws IOException
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{
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super(out);
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this.descs = descs;
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}
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protected void writeClassDescriptor(ObjectStreamClass desc)
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throws IOException
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{
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descs.add(desc);
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}
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}
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class LoopbackInputStream extends ObjectInputStream {
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LinkedList<ObjectStreamClass> descs;
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LoopbackInputStream(InputStream in, LinkedList<ObjectStreamClass> descs) throws IOException {
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super(in);
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this.descs = descs;
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}
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protected ObjectStreamClass readClassDescriptor()
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throws IOException, ClassNotFoundException
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{
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return descs.removeFirst();
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}
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}
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public class ExternLoopback implements Externalizable {
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private static final long serialVersionUID = 1L;
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String a, b, c;
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public ExternLoopback() {
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}
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ExternLoopback(String a, String b, String c) {
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this.a = a;
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this.b = b;
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this.c = c;
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}
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public void writeExternal(ObjectOutput out) throws IOException {
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out.writeBoolean(false);
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out.writeObject(a);
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out.writeObject(b);
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out.writeObject(c);
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}
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public void readExternal(ObjectInput in)
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throws IOException, ClassNotFoundException
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{
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in.readBoolean();
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a = (String) in.readObject();
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b = (String) in.readObject();
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c = (String) in.readObject();
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}
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public boolean equals(Object obj) {
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if (!(obj instanceof ExternLoopback)) {
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return false;
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}
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ExternLoopback other = (ExternLoopback) obj;
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return streq(a, other.a) && streq(b, other.b) && streq(c, other.c);
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}
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public int hashCode() {
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return a.hashCode();
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}
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static boolean streq(String s1, String s2) {
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return (s1 != null) ? s1.equals(s2) : (s2 == null);
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}
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public static void main(String[] args) throws Exception {
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ExternLoopback lb = new ExternLoopback("foo", "bar", "baz");
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LinkedList<ObjectStreamClass> descs = new LinkedList<>();
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ByteArrayOutputStream bout = new ByteArrayOutputStream();
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LoopbackOutputStream lout = new LoopbackOutputStream(bout, descs);
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lout.writeObject(lb);
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lout.close();
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LoopbackInputStream lin = new LoopbackInputStream(
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new ByteArrayInputStream(bout.toByteArray()), descs);
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ExternLoopback lbcopy = (ExternLoopback) lin.readObject();
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if (!lb.equals(lbcopy)) {
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throw new Error();
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}
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}
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}
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