Source Code Cross Referenced for JUMPDownloadDestination.java in  » 6.0-JDK-Modules » j2me » com » sun » jump » module » download » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.jump.module.download 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * %W% %E%
003:         *
004:         * Copyright  1990-2006 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation. 
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt). 
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA 
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions. 
025:         */
026:        package com.sun.jump.module.download;
027:
028:        import java.io.IOException;
029:        import java.io.InputStream;
030:        import java.net.URL;
031:
032:        /**
033:         * <code>JUMPDownloadDestination</code> provides the interface to 
034:         * receive the data that is downloaded by the <code>JUMPDownloadAction</code>.
035:         * The <Code>start()</code> is called first before the download operation
036:         * and if not exceptions are thrown by the method, then the 
037:         * <code>receive()</code> method is called one or more times as the 
038:         * downloading of data happens. Finally the <code>finish()</code> method
039:         * is called if the data has been successfully downloaded and delivered to
040:         * the destination or the <code>abort()</code> method is called if the
041:         * download operation was aborted by the user or the system.
042:         */
043:        public interface JUMPDownloadDestination {
044:            /**
045:             * Notifies the destination the download is about to start.
046:             * 
047:             * @param sourceURL source URL
048:             * @param mimeType mime type of the object to be sent to
049:             * this destination.
050:             * @throws JUMPJUMPDownloadException is at implemntation's discretion
051:             * to throw an JUMPJUMPDownloadException anything goes wrong. The download
052:             * will be cancelled and this exception will be bubbled up.
053:             * @throws IOException signal that there was an IO error.
054:             */
055:            public void start(URL sourceURL, String mimeType)
056:                    throws JUMPDownloadException, IOException;
057:
058:            /**
059:             * Requests this destination to receive a part of the object
060:             * being downloaded.
061:             * 
062:             * @param in The InputStream to read from
063:             * @param desiredLength The number of bytes to receive
064:             * @return the total number of bytes read, or <code>-1</code> is
065:             * there is no more data because the end of the stream has been
066:             * reached.
067:             * @throws JUMPDJUMPDownloadExceptionis at implemntation's discretion
068:             * to throw an JUMPDJUMPDownloadExceptionanything goes wrong. The download
069:             * will be cancelled and this exception will be bubbled up.
070:             * @throws IOException signal that there was an IO error.
071:             */
072:            public int receive(InputStream in, int desiredLength)
073:                    throws JUMPDownloadException, IOException;
074:
075:            /**
076:             * Notifies the destination that the object download is done. If the
077:             * destination has successfully stored the data, it returns the URL
078:             * where the destination has stored the application content.
079:             * 
080:             * @return the URL of the application content that was downloaded.
081:             * @throws JUMPJUMPDownloadException is at implemntation's discretion
082:             * to throw an JUMPJUMPDownloadException anything goes wrong. The download
083:             * will be cancelled and this exception will be bubbled up.
084:             * @throws IOException signal that there was an IO error.
085:             */
086:            public URL finish() throws JUMPDownloadException, IOException;
087:
088:            /**
089:             * Notifies the destination that the object acquisition has
090:             * failed or was stopped. There will be no more bits sent, and the
091:             * {@link #finish()} method will not be called.
092:             */
093:            public void abort();
094:
095:            /**
096:             * Asks the destination what's the maximum buffer size should
097:             * be used for downloading.
098:             * @return maximum buffer size to be used for downloading, or 0,
099:             * to let the implementation decide what's best.
100:             * <br>
101:             */
102:            public int getMaxChunkSize();
103:        }
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