src/java.desktop/macosx/classes/com/apple/eawt/MacQuitResponse.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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.
 *
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package com.apple.eawt;

import java.awt.desktop.QuitEvent;
import java.awt.desktop.QuitHandler;
import java.awt.desktop.QuitResponse;
import java.awt.desktop.QuitStrategy;

/**
 * Used to respond to a request to quit the application.
 * The QuitResponse may be used after the {@link QuitHandler#handleQuitRequestWith(QuitEvent, QuitResponse)} method has returned, and may be used from any thread.
 *
 * @see Application#setQuitHandler(QuitHandler)
 * @see QuitHandler
 * @see Application#setQuitStrategy(QuitStrategy)
 *
 * @since Java for Mac OS X 10.6 Update 3
 * @since Java for Mac OS X 10.5 Update 8
 */
public class MacQuitResponse implements QuitResponse {
    final _AppEventHandler appEventHandler;

    MacQuitResponse(final _AppEventHandler appEventHandler) {
        this.appEventHandler = appEventHandler;
    }

    /**
     * Notifies the external quit requester that the quit will proceed, and performs the default {@link QuitStrategy}.
     */
    @Override
    public void performQuit() {
        if (appEventHandler.currentQuitResponse != this) return;
        appEventHandler.performQuit();
    }

    /**
     * Notifies the external quit requester that the user has explicitly canceled the pending quit, and leaves the application running.
     * <b>Note: this will cancel a pending log-out, restart, or shutdown.</b>
     */
    @Override
    public void cancelQuit() {
        if (appEventHandler.currentQuitResponse != this) return;
        appEventHandler.cancelQuit();
    }
}