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