Thread: Modify Hub code to Switch

Hi Everyone,

I am new to the Java world, but I am willing to learn, because it's an exciting programming language. I have a code for a Hub and I wanted to modify it to a Switch. Please help me. See the code below:

--- Update ---

package module.Hub;

import framework.Port;
import module.ModuleUI;
import java.lang.String;
import framework.Packet;

public class HubMod extends module.ModuleAbstractClass {

static final int MAXPORTS = 10;
int noOfPorts = 0;
double absoluteTime = 0;
private Port ports[];
private int serialNo = 0;
private final String name = "Hub";
private boolean newPacket = false;
private ModuleUI modUI = null;

public HubMod() {
buffer.EditMode.module = this;
ports = new Port[MAXPORTS];
modUI = new HubUI(this);
}

public void setSno(int n) {
serialNo = n;
}

/**
* Adds a new port (connection)
*
* @return The error code if any. e.g. ERROR_ALREADY_MAX_ports is returned if no more ports of type wireType can be handeled by this module.
*/
public int addPort(Port port, int wireType) {
if (noOfPorts < MAXPORTS) {
ports[noOfPorts++] = port;
port.setActive(true);
modUI.getModWin().msg.append("\nADDED port " + noOfPorts);
return 1;
} else
return ERROR_ALREADY_MAX_PORTS;
}

/**
* If the implementing class doesn't want to extend or create an object of ModuleUI them return null.
*
* @return
*/
public ModuleUI getModuleUI() {
return modUI;
}

public void setModuleUI(ModuleUI m) {
modUI = m;
}

/**
* Returns the name of the implementing module. This name is displayed by the UI.
*
* @return
*/
public String getName() {
return name;
}

/**
* USES R-R SCHEDULING TO SERVICE THE PORTS
*/
public boolean step(double TimeStep) {
absoluteTime++;
int noOfDataPorts = 0;
for (int x = 0; x < noOfPorts; x++) {
if (ports[x].hasData()) {
noOfDataPorts++;
}
}
if (noOfDataPorts == 1) {
for (int i = 0; i < noOfPorts; i++) {
if (ports[i].hasData()) {
Packet packet = ports[i].getPacket(this);
modUI.getModWin().msg.append("\nFrom:" + i + " To:");
for (int j = 0; j < noOfPorts; j++) {
if (j != i) {
modUI.getModWin().msg.append(" " + j);
Packet tempPacket = new Packet(packet);
tempPacket.dataUI = null;
ports[j].putPacket(tempPacket, this);
ports[j].setActive(true);
newPacket = true;
}

}
return true;
}
}

} else if (noOfDataPorts > 1) {
modUI.getModWin().msg.append("\nMultiple Packets, ports: ");
for (int i = 0; i < noOfPorts; i++) {
if (ports[i].hasData()) {
modUI.getModWin().msg.append(" " + i);
Packet packet = ports[i].getPacket(this);
for (int j = 0; j < noOfPorts; j++) {
Packet tempPacket = new Packet(packet);
tempPacket.dataUI = null;
tempPacket.gotCorrupted();
ports[j].putPacket(tempPacket, this);
ports[j].setActive(true);
newPacket = true;

}
return false;
}
}
}
// boolean Success or failure
return true;
}

public boolean reset() { // passed when the simulation is reset
for (int i = 0; i < noOfPorts; i++)
if (ports[i].hasData())
ports[i].getPacket(this);
absoluteTime = 0;
return true;
}

public Port[] getPorts() {// Gives the list of already initialized ports
return ports;
}

public boolean isNewPacket() {// Tells whether new packet is released by the module. If released, it sends true and resets the flag,else it
// returns false.
if (newPacket == true) {
newPacket = false;
return true;
} else
return false;
}

public int getNoOfPorts() {
return noOfPorts;
}

public int getSno() {

return serialNo;
}

}

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