platformrequest.java

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/*
 *
 *
 * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program 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 program 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 at /legal/license.txt).
 * 
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package com.sun.midp.midlet;

import javax.microedition.io.ConnectionNotFoundException;

/**
 * Abstracts the platform request functionality for each VM platform.
 */
public interface PlatformRequest {
    /**
     * Requests that the device handle (e.g. display or install)
     * the indicated URL.
     *
     * <p>If the platform has the appropriate capabilities and
     * resources available, it SHOULD bring the appropriate
     * application to the foreground and let the user interact with
     * the content, while keeping the MIDlet suite running in the
     * background. If the platform does not have appropriate
     * capabilities or resources available, it MAY wait to handle the
     * URL request until after the MIDlet suite exits. In this case,
     * when the requesting MIDlet suite exits, the platform MUST then
     * bring the appropriate application to the foreground to let the
     * user interact with the content.</p>
     *
     * <p>This is a non-blocking method. In addition, this method does
     * NOT queue multiple requests. On platforms where the MIDlet
     * suite must exit before the request is handled, the platform
     * MUST handle only the last request made. On platforms where the
     * MIDlet suite and the request can be handled concurrently, each
     * request that the MIDlet suite makes MUST be passed to the
     * platform software for handling in a timely fashion.</p>
     *
     * <p>If the URL specified refers to a MIDlet suite (either an
     * Application Descriptor or a JAR file), the request is
     * interpreted as a request to install the named package. In this
     * case, the platform's normal MIDlet suite installation process
     * SHOULD be used, and the user MUST be allowed to control the
     * process (including cancelling the download and/or
     * installation). If the MIDlet suite being installed is an
     * <em>update</em> of the currently running MIDlet suite, the
     * platform MUST first stop the currently running MIDlet suite
     * before performing the update. On some platforms, the currently
     * running MIDlet suite MAY need to be stopped before any
     * installations can occur.</p>
     *
     * <p>If the URL specified is of the form
     * <code>tel:&lt;number&gt;</code>, as specified in <a
     * href="http://rfc.net/rfc2806.html">RFC2806</a>, then the
     * platform MUST interpret this as a request to initiate a voice
     * call. The request MUST be passed to the &quot;phone&quot;
     * application to handle if one is present in the platform.</p>
     *
     * <p>Devices MAY choose to support additional URL schemes beyond
     * the requirements listed above.</p>
     *
     * <p>Many of the ways this method will be used could have a
     * financial impact to the user (e.g. transferring data through a
     * wireless network, or initiating a voice call). Therefore the
     * platform MUST ask the user to explicitly acknowledge each
     * request before the action is taken. Implementation freedoms are
     * possible so that a pleasant user experience is retained. For
     * example, some platforms may put up a dialog for each request
     * asking the user for permission, while other platforms may
     * launch the appropriate application and populate the URL or
     * phone number fields, but not take the action until the user
     * explicitly clicks the load or dial buttons.</p>
     *
     * @return true if the MIDlet suite MUST first exit before the
     * content can be fetched.
     *
     * @param URL The URL for the platform to load.
     *
     * @exception ConnectionNotFoundException if
     * the platform cannot handle the URL requested.
     *
     */
    boolean dispatch(String URL) throws ConnectionNotFoundException;
}