1 /* 2 * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 4348213 27 * @build UnnamedPackageSwitchTest pkg.A 28 * @run main UnnamedPackageSwitchTest 29 * @summary Verify that deserialization allows an incoming class descriptor 30 * representing a class in the unnamed package to be resolved to a 31 * local class with the same name in a named package, and vice-versa. 32 */ 33 34 import java.io.ByteArrayInputStream; 35 import java.io.ByteArrayOutputStream; 36 import java.io.InputStream; 37 import java.io.IOException; 38 import java.io.ObjectOutputStream; 39 import java.io.ObjectInputStream; 40 import java.io.ObjectStreamClass; 41 import java.io.Serializable; 42 43 class A implements Serializable { 44 private static final long serialVersionUID = 0L; 45 } 46 47 class TestObjectInputStream extends ObjectInputStream { 48 TestObjectInputStream(InputStream in) throws IOException { super(in); } 49 protected Class resolveClass(ObjectStreamClass desc) 50 throws IOException, ClassNotFoundException 51 { 52 String name = desc.getName(); 53 if (name.equals("A")) { 54 return pkg.A.class; 55 } else if (name.equals("pkg.A")) { 56 return A.class; 57 } else { 58 return super.resolveClass(desc); 59 } 60 } 61 } 62 63 public class UnnamedPackageSwitchTest { 64 public static void main(String[] args) throws Exception { 65 ByteArrayOutputStream bout = new ByteArrayOutputStream(); 66 ObjectOutputStream oout = new ObjectOutputStream(bout); 67 oout.writeObject(new A()); 68 oout.writeObject(new pkg.A()); 69 oout.close(); 70 71 ObjectInputStream oin = new TestObjectInputStream( 72 new ByteArrayInputStream(bout.toByteArray())); 73 oin.readObject(); 74 oin.readObject(); 75 } 76 }