archiveloader.java

主要是对串口驱动的的一些控制源码！！！ 在下载javacomm20-win32.zip后就可以使用。

/*
 * $Log: ArchiveLoader.java,v $
 * Revision 1.2  2003/02/25 17:18:52  willaxt
 * updated javadoc comments
 * prevented storing incomplete loaded byte array in loadArchive
 * no if the archive is loaded incompletely due to an exception,
 * the byte array is reset to null
 *
 * Revision 1.1  2003/02/12 16:42:52  mwulff
 * initial version
 *
 */
package de.fhm.jkf.launch.cl;

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.swing.ProgressMonitorInputStream;

/**
 * <br><br><center><table border="1" width="80%"><hr>
 * <strong><a href="http://jkf.sourceforge.net">The JKF Project</a></strong>
 * <p>
 * Copyright (C) 2002 by Marten Wulff
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library 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
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the <a href="http://www.gnu.org/copyleft/lesser.html">
 * GNU Lesser General Public License</a> along with this library; if not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA  02111-1307  USA
 * <hr></table></center>
 * 
 * Responsible for displaying a progress bar, if an archive is
 * loaded over the net.
 * 
 * @author		marten wulff
 * @version 	1.0
 */
public class ArchiveLoader {

	/** the InputStream from which should be read data. */
	private InputStream in = null;
	
	/** stores the date read from the InputStream. */
	private byte[] data = null;
	
	/** Max data length. */
	private long max = -1;
	
	/** Name of the archive to load. */
	private String archiveName = "Unknown";
	
	/**
	 * Constructs an object which monitors loading of
	 * an java archive.
	 * 
	 * @param in The input stream to read from.
	 */
	public ArchiveLoader(InputStream in, long max, String archiveName) {
		this.in = in;
		this.max = max;
		this.archiveName = archiveName;
	}


	/**
	 * Does the loading of the archive and displays a
	 * progress bar according the load progress.
	 */
	public void loadArchive() {
		
		ProgressMonitorInputStream pmis =
			new ProgressMonitorInputStream(null, "Reading archive " + archiveName, in);
			
		pmis.getProgressMonitor().setMillisToDecideToPopup(1);
		pmis.getProgressMonitor().setMillisToPopup(1);
		pmis.getProgressMonitor().setMaximum((int) max);

		InputStream buffIn = new BufferedInputStream(pmis);
		ByteArrayOutputStream out = new ByteArrayOutputStream();

		try {
			int len;
			byte[] buf = new byte[4096];
			while ((len = buffIn.read(buf)) > 0) {
				out.write(buf, 0, len);
			}
			buffIn.close();
			data = out.toByteArray();
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
			// don't return incomplete archive
			data = null;
		} 
	}

	/**
	 * Returns the <code>byte</code>s that repressent
	 * the loaded archive. It is mandatory that
	 * <code>loadArchive</code> is called before you
	 * call this method.
	 * 
	 * @return The loaded archive or <code>null</code> if
	 * no archive was loaded.
	 */
	public byte[] getData() {
		return data;
	}
}