120 lines
3.9 KiB
Java
120 lines
3.9 KiB
Java
/*
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* Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 4099660 4102938
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* @summary Remote classes not extending RemoteObject should be able to
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* implement hashCode() and equals() methods so that instances
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* can be successfully compared to RemoteObject instances
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* (specifically: stubs) that contain the instance's RemoteRef.
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* @author Peter Jones
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*
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* @build NotExtending_Stub NotExtending_Skel
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* @run main/othervm NotExtending
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*/
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import java.rmi.*;
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import java.rmi.server.*;
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public class NotExtending implements Remote {
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/** remote stub for this server instance */
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private Remote stub;
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/** value of stub's hash code */
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private int hashValue;
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/** true if the hashValue field has been initialized */
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private boolean hashValueInitialized = false;
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// no declared constructor - rely on implicit no-arg contructor
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public Remote export() throws RemoteException {
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stub = UnicastRemoteObject.exportObject(this);
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setHashValue(stub.hashCode());
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return stub;
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}
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public void unexport() throws RemoteException {
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UnicastRemoteObject.unexportObject(this, true);
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}
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private void setHashValue(int value) {
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hashValue = value;
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hashValueInitialized = true;
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}
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public int hashCode() {
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/*
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* Test fails if the hashCode() method is called (during export)
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* before the correct hash value has been initialized.
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*/
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if (!hashValueInitialized) {
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throw new AssertionError(
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"hashCode() invoked before hashValue initialized");
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}
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return hashValue;
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}
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public boolean equals(Object obj) {
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return stub.equals(obj);
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}
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public static void main(String[] args) throws Exception {
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NotExtending server = null;
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try {
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/*
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* Verify that hashCode() is not invoked before it is
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* initialized. Tests bugid 4102938.
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*/
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server = new NotExtending();
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Remote stub = server.export();
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System.err.println("Server exported without invoking hashCode().");
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/*
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* Verify that passing stub to server's equals() method
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* returns true.
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*/
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if (server.equals(stub)) {
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System.err.println("server.equals(stub) returns true");
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} else {
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throw new AssertionError("server.equals(stub) returns false");
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}
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/*
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* Verify that passing server to stub's equals() method
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* returns true. Tests bugid 4099660.
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*/
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if (stub.equals(server)) {
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System.err.println("stub.equals(server) returns true");
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} else {
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throw new AssertionError("stub.equals(server) returns false");
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}
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} finally {
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if (server != null) {
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server.unexport();
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}
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}
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}
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}
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