// $Id: MessagePanel.java,v 1.5.2.3 2003/08/26 09:08:10 cssharp Exp $/*									tab:4 * "Copyright (c) 2000-2003 The Regents of the University  of California.   * All rights reserved. * * Permission to use, copy, modify, and distribute this software and its * documentation for any purpose, without fee, and without written agreement is * hereby granted, provided that the above copyright notice, the following * two paragraphs and the author appear in all copies of this software. *  * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *  * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS." * * Copyright (c) 2002-2003 Intel Corporation * All rights reserved. * * This file is distributed under the terms in the attached INTEL-LICENSE      * file. If you do not find these files, copies can be found by writing to * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA,  * 94704.  Attention:  Intel License Inquiry. *//* Authors:  Philip Levis  <pal@cs.berkeley.edu> * *//** * MessagePanel is a swing panel representing a TinyOS message type: * message fields can be viewed and edited. * @author Philip Levis <pal@cs.berkeley.edu> */package net.tinyos.message;import java.awt.*;import java.lang.reflect.*;import java.util.*;import javax.swing.*;import javax.swing.text.*;public class MessagePanel extends JPanel {    private Message message;    private Vector fields = new Vector();    private String className;        public MessagePanel(Message msg) throws Exception {	message = msg;	className = msg.getClass().getName();	loadFields();		this.setLayout(new GridLayout(0, 1));	this.setAlignmentX(LEFT_ALIGNMENT);	for (int i = 0; i < fields.size(); i++) {	    JPanel panel = (JPanel)fields.elementAt(i);	    panel.setAlignmentX(LEFT_ALIGNMENT);	    add(panel);	}    }    private void loadFields() {	Method [] methods = message.getClass().getMethods();	for (int i = 0; i < methods.length; i++) {	    Method method = methods[i];	    String name = method.getName();	    if (name.startsWith("set_")) {		name = name.substring(4);		Class[] params = method.getParameterTypes();		if (params.length != 1) {		    System.err.println("Found unknown field " + name.substring(3) + " with " + method.getParameterTypes().length + " parameters: not adding to structure.");		    return;		}		else if (params[0].isArray()) {		    loadArrayField(name, method, params[0]);		}		else {		    loadField(name, method, params[0]);		}	    }	}    }    // Pass the set method so we can look at its parameters more    // easily -- otherwise we'd have to scan the method list again    private void loadField(String name, Method setMethod, Class type) {	Method get;	Method set;	Method offset;	Method size;	Method signed;	Class[] params = null;	//System.err.println("Loading field: " + name);	try {	    size = message.getClass().getMethod("size_" + name, params);	    get = message.getClass().getMethod("get_" + name, params);	    signed = message.getClass().getMethod("isSigned_" + name, params);	    set = setMethod;	    Integer lengthObj = (Integer)size.invoke(message, null);	    int unitLength = lengthObj.intValue();	    Boolean signedness = (Boolean)signed.invoke(message, null);	    MessageField field = new MessageField(message, name, unitLength, signedness.booleanValue(), get.getReturnType());	    fields.addElement(field);	}	catch (NoSuchMethodException exception) {	    //System.err.println("Exception thrown looking for methods of field " + name + " in class " + className);	    //System.err.println(exception);	}	catch (IllegalAccessException exception) {	     System.err.println("Exception thrown looking for methods of field " + name + " in class " + className);	     System.err.println(exception);	}    	catch (InvocationTargetException exception) {	     System.err.println("Exception thrown looking for methods of field " + name + " in class " + className);	     System.err.println(exception);	}    }    private void loadArrayField(String name, Method setMethod, Class type) {	Method get;	Method set;	Method offset;	Method size;	Method unit;	Method signed;	Class[] params = new Class[1];	params[0] = type;	//System.err.println("Loading array field: " + name);	try {	    size = message.getClass().getMethod("totalSize_" + name, null);	    get = message.getClass().getMethod("get_" + name, null);	    unit = message.getClass().getMethod("elementSize_" + name, null);	    signed = message.getClass().getMethod("isSigned_" + name, null);	    set = setMethod;	    Integer lengthObj = (Integer)unit.invoke(message, null);	    int unitLength = lengthObj.intValue();	    Integer sizeObj = (Integer)size.invoke(message, null);	    int totalLength = sizeObj.intValue();	    Boolean isSigned = (Boolean)signed.invoke(message, null);	    MessageField field = new MessageField(message, name, unitLength, isSigned.booleanValue(), type, true, totalLength / unitLength);	    fields.addElement(field);	}	catch (NoSuchMethodException exception) {	    //System.err.println("Exception thrown looking for methods of field " + name + " in class " + className);	    //System.err.println(exception);	}	catch (IllegalAccessException exception) {	    System.err.println("Exception thrown looking for methods of field " + name + " in class " + className);	    System.err.println(exception);	}    	catch (InvocationTargetException exception) {	    System.err.println("Exception thrown looking for methods of field " + name + " in class " + className);	    System.err.println(exception);	}    }            public void write() throws Exception {	for (int i = 0; i < fields.size(); i++) {	    MessageField field = (MessageField)fields.elementAt(i);	    field.write();	}    }    public Message getMessage() throws Exception {	write();	return message;    }        public byte[] get() throws Exception {	write();	return message.dataGet();    }        public static void main(String[] args) throws Exception {	Message msg = new TOSMsg();	MessagePanel p = new MessagePanel(msg);	JFrame frame = new JFrame("MessagePanel Test");	frame.getContentPane().add(p);	frame.pack();	frame.setVisible(true);    }}