| /* |
| * Copyright (c) 1999, 2010, 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 4227189 |
| * @summary Ensure that class descriptor read, write hooks exist, are backwards |
| * compatible, and work as advertised. |
| */ |
| |
| import java.io.*; |
| import java.util.*; |
| |
| class Foo implements Serializable { |
| private static final long serialVersionUID = 1L; |
| Short s = new Short((short) 1); |
| Integer i = new Integer(2); |
| Long l = new Long(3); |
| |
| public boolean equals(Object obj) { |
| if (obj instanceof Foo) { |
| Foo ofoo = (Foo) obj; |
| return s.equals(ofoo.s) && i.equals(ofoo.i) && l.equals(ofoo.l); |
| } |
| return false; |
| } |
| } |
| |
| class CustomOutputStream extends ObjectOutputStream { |
| |
| boolean hookCalled = false; |
| |
| CustomOutputStream(OutputStream out) throws IOException { |
| super(out); |
| useProtocolVersion(PROTOCOL_VERSION_2); |
| } |
| |
| protected void writeClassDescriptor(ObjectStreamClass desc) |
| throws IOException |
| { |
| writeUTF(desc.getName()); |
| hookCalled = true; |
| } |
| } |
| |
| class CustomInputStream extends ObjectInputStream { |
| |
| boolean hookCalled = false; |
| |
| CustomInputStream(InputStream in) throws IOException { |
| super(in); |
| } |
| |
| protected ObjectStreamClass readClassDescriptor() |
| throws IOException, ClassNotFoundException |
| { |
| hookCalled = true; |
| return ObjectStreamClass.lookup(Class.forName(readUTF())); |
| } |
| } |
| |
| public class ClassDescHooks implements ObjectStreamConstants { |
| public static void main(String[] args) throws Exception { |
| ByteArrayOutputStream bout; |
| ByteArrayInputStream bin; |
| ObjectOutputStream oout; |
| ObjectInputStream oin; |
| FileInputStream fin; |
| File foof; |
| CustomOutputStream cout; |
| CustomInputStream cin; |
| |
| // test for backwards compatibility |
| bout = new ByteArrayOutputStream(); |
| foof = new File(System.getProperty("test.src", "."), "Foo.ser"); |
| fin = new FileInputStream(foof); |
| try { |
| while (fin.available() > 0) |
| bout.write(fin.read()); |
| } finally { |
| fin.close(); |
| } |
| byte[] buf1 = bout.toByteArray(); |
| |
| bout = new ByteArrayOutputStream(); |
| oout = new ObjectOutputStream(bout); |
| Foo foo = new Foo(); |
| oout.writeObject(foo); |
| oout.flush(); |
| byte[] buf2 = bout.toByteArray(); |
| |
| if (! Arrays.equals(buf1, buf2)) |
| throw new Error("Incompatible stream format (write)"); |
| |
| Foo foocopy; |
| fin = new FileInputStream(foof); |
| try { |
| oin = new ObjectInputStream(fin); |
| foocopy = (Foo) oin.readObject(); |
| if (! foo.equals(foocopy)) |
| throw new Error("Incompatible stream format (read)"); |
| } finally { |
| fin.close(); |
| } |
| |
| // make sure write hook not called when old protocol in use |
| bout = new ByteArrayOutputStream(); |
| cout = new CustomOutputStream(bout); |
| cout.useProtocolVersion(PROTOCOL_VERSION_1); |
| cout.writeObject(foo); |
| if (cout.hookCalled) |
| throw new Error("write descriptor hook should not be called"); |
| |
| // write custom class descriptor representations |
| bout = new ByteArrayOutputStream(); |
| cout = new CustomOutputStream(bout); |
| cout.writeObject(foo); |
| cout.flush(); |
| bin = new ByteArrayInputStream(bout.toByteArray()); |
| cin = new CustomInputStream(bin); |
| foocopy = (Foo) cin.readObject(); |
| if (! cout.hookCalled) |
| throw new Error("write descriptor hook never called"); |
| if (! cin.hookCalled) |
| throw new Error("read descriptor hook never called"); |
| if (! foo.equals(foocopy)) |
| throw new Error("serialization failed when hooks active"); |
| } |
| } |