messagefactory.java

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package net.tinyos.message;
import java.lang.reflect.*;
import net.tinyos.packet.*;
public class MessageFactory {
    PhoenixSource  source = null;

    PacketSource pSource = null;

    int platform;

    public MessageFactory(PhoenixSource src) {
	source = src; 
	pSource = null;
	//	System.err.println("Created factory");
    }

    public MessageFactory(PacketSource src) {
	source = null; 
	pSource = src;
	//	System.err.println("Created factory");
    }

    public MessageFactory(int platform) {
	source = null;
	pSource = null;
	this.platform = platform;
    }

    public MessageFactory() {
	this(Platform.defaultPlatform);
    }

    public TOSMsg createTOSMsg() {
	Object []initArgs = null;
	Class [] cArgs=null;
	return instantiateTOSMsg(cArgs, initArgs);
    }

    public TOSMsg createTOSMsg(int data_length) {
	Object []initArgs = new Object[1];
	Class [] cArgs=new Class[1];
	cArgs[0] = Integer.TYPE;
	initArgs[0] = new Integer(data_length);
	return instantiateTOSMsg(cArgs, initArgs);
    }

    public TOSMsg createTOSMsg(int data_length, int base_offset) {
	Object []initArgs = new Object[2];
	Class []cArgs = new Class[2];
	initArgs[0] = new Integer(data_length);
	initArgs[1] = new Integer(base_offset);
	cArgs[0] = Integer.TYPE; cArgs[1] = Integer.TYPE;
	return instantiateTOSMsg(cArgs, initArgs); 
    }

    public TOSMsg createTOSMsg(byte data[]) {
	Object initArgs[] = new Object[1];
	Class cArgs[] = new Class[1];
	cArgs[0] = data.getClass();
	initArgs[0] = data;
	
	return instantiateTOSMsg(cArgs, initArgs);
    }

    public TOSMsg createTOSMsg(byte[] data, int base_offset) {
	Object initArgs[] = new Object[2];
	Class cArgs[] = new Class[2];
	initArgs[0] = data;
	initArgs[1] = new Integer(base_offset);
	cArgs[0] = data.getClass();
	cArgs[1] = Integer.TYPE;
	return instantiateTOSMsg(cArgs, initArgs);
    }

    public TOSMsg createTOSMsg(byte[] data, int base_offset, int data_length) {
	Object initArgs[] = new Object[3];
	Class cArgs[] = new Class[3];
	initArgs[0] = data;
	initArgs[1] = new Integer(base_offset);
	initArgs[2] = new Integer(data_length);
	cArgs[0] = data.getClass();
	cArgs[1] = Integer.TYPE;
	cArgs[2] = Integer.TYPE;
	return instantiateTOSMsg(cArgs,initArgs);
    }

    public TOSMsg createTOSMsg(net.tinyos.message.Message msg, int base_offset) {
	Object initArgs[] = new Object[2];
	Class cArgs[] = new Class[2];
	initArgs[0] = msg;
	initArgs[1] = new Integer(base_offset);
	cArgs[1] = Integer.TYPE;
	cArgs[0] = net.tinyos.message.Message.class;
	return instantiateTOSMsg(cArgs,initArgs);

    }

    public TOSMsg createTOSMsg(net.tinyos.message.Message msg, int base_offset, int data_length) { 
	Object initArgs[] = new Object[3];
	Class cArgs[] = new Class[3];
	initArgs[0] = msg;
	initArgs[1] = new Integer(base_offset);
	initArgs[2] = new Integer(data_length);
	cArgs[0] = net.tinyos.message.Message.class;
	cArgs[1] = Integer.TYPE;
	cArgs[2] = Integer.TYPE;
	return instantiateTOSMsg(cArgs,initArgs);
    }


    TOSMsg instantiateTOSMsg(Class [] cArgs, Object [] args) {
	try { 
	    Class msgCls;
	    if (source != null) { // we got instantiated with a phoenix source
		msgCls = Class.forName("net.tinyos.message."+
					 Platform.getPlatformName(source.getPacketSource().getPlatform())+".TOSMsg");
	    } else if (pSource != null){ // we got instantiated with a concrete source
		msgCls = Class.forName("net.tinyos.message."+
					 Platform.getPlatformName(pSource.getPlatform())+".TOSMsg");
	    } else { // we got instantiated with the concrete platform ID,
		     // that's the current workaround for TOSSIM
		msgCls = Class.forName("net.tinyos.message."+
					 Platform.getPlatformName(platform)+".TOSMsg");
	    }
	    Constructor c = msgCls.getConstructor(cArgs);
	    return (TOSMsg) c.newInstance(args);
	} catch (ClassNotFoundException e) {
	    System.err.println("Could not find a platform specific version of TOSMsg");
	    System.err.println(e);
	    e.printStackTrace();
	} catch (NoSuchMethodException e) {
	    System.err.println("Could not locate the appropriate constructor; check the class "+"net.tinyos.message."+
					 Platform.getPlatformName(source.getPacketSource().getPlatform())+
			       ".TOSMsg");
	    e.printStackTrace();
	} catch (InstantiationException e) {
	    System.err.println("Could not instantiate the class: "+e);
	    e.printStackTrace();
	} catch (IllegalAccessException e) {
	    System.err.println("Illegal access: "+e);
	    e.printStackTrace();
	} catch (InvocationTargetException e) {
	    System.err.println("Reflection problems: "+e);
	    e.printStackTrace();
	}
	return null;
    }
    
}