| /* |
| * 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(); |
| } |
| } |
| } |