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/*
* Copyright (c) 1998, 2014, 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 4099660 4102938
* @summary Remote classes not extending RemoteObject should be able to
* implement hashCode() and equals() methods so that instances
* can be successfully compared to RemoteObject instances
* (specifically: stubs) that contain the instance's RemoteRef.
* @author Peter Jones
*
* @build NotExtending_Stub NotExtending_Skel
* @run main/othervm NotExtending
*/
import java.rmi.*;
import java.rmi.server.*;
public class NotExtending implements Remote {
/** remote stub for this server instance */
private Remote stub;
/** value of stub's hash code */
private int hashValue;
/** true if the hashValue field has been initialized */
private boolean hashValueInitialized = false;
// no declared constructor - rely on implicit no-arg contructor
public Remote export() throws RemoteException {
stub = UnicastRemoteObject.exportObject(this);
setHashValue(stub.hashCode());
return stub;
}
public void unexport() throws RemoteException {
UnicastRemoteObject.unexportObject(this, true);
}
private void setHashValue(int value) {
hashValue = value;
hashValueInitialized = true;
}
public int hashCode() {
/*
* Test fails if the hashCode() method is called (during export)
* before the correct hash value has been initialized.
*/
if (!hashValueInitialized) {
throw new AssertionError(
"hashCode() invoked before hashValue initialized");
}
return hashValue;
}
public boolean equals(Object obj) {
return stub.equals(obj);
}
public static void main(String[] args) throws Exception {
NotExtending server = null;
try {
/*
* Verify that hashCode() is not invoked before it is
* initialized. Tests bugid 4102938.
*/
server = new NotExtending();
Remote stub = server.export();
System.err.println("Server exported without invoking hashCode().");
/*
* Verify that passing stub to server's equals() method
* returns true.
*/
if (server.equals(stub)) {
System.err.println("server.equals(stub) returns true");
} else {
throw new AssertionError("server.equals(stub) returns false");
}
/*
* Verify that passing server to stub's equals() method
* returns true. Tests bugid 4099660.
*/
if (stub.equals(server)) {
System.err.println("stub.equals(server) returns true");
} else {
throw new AssertionError("stub.equals(server) returns false");
}
} finally {
if (server != null) {
server.unexport();
}
}
}
}
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