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Packet.java

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/* Cyclops
 * FER - SPVP
 * Fakultet elektrotehnike i racunarstva (http://www.fer.hr/)
 * Unska 3, 10000 Zagreb, Hrvatska
 * (c) 2001 FER, Zagreb.
 */

package hr.fer.zesoi.cyclops;

import java.awt.*;


public class Packet
{

    protected StringBuffer contents;

    protected int packet_length = 500;

    protected Node source_node = null;

    protected Node destination_node = null;

    protected int time_to_live = 40;

    protected boolean draw = false;

    public Packet ()
    {
        contents = new StringBuffer (packet_length);
    }
    /* Packet */

    public Packet (int length)
    {
        if(length < 0) length = 500;
        packet_length = length;
        contents = new StringBuffer(packet_length);
    }
    /* Packet */

    public Packet (int length, Node source, Node destination)
    {
        if(length < 0) length = 500;
        packet_length = length;
        source_node = source;
        destination_node = destination;
        contents = new StringBuffer(packet_length);
    }
    /* Packet */

    public Packet (int length, Node source, Node destination, int ttl)
    {
        if(length < 0) length = 500;
        packet_length = length;
        source_node = source;
        destination_node = destination;
        contents = new StringBuffer(packet_length);
        time_to_live = ttl;
    }
    /* Packet */

    public StringBuffer getContents ()
    {
        return contents;
    }
    /* getContents */

    public void setContents (StringBuffer contents)
    {
        this.contents.setLength(0);
        this.contents.append(contents);
        this.contents.setLength(packet_length);
    }
    /* setContents */

    public int getLength ()
    {
        return packet_length;
    }
    /* getLength */

    public void setTimeToLive (int time_to_live)
    {
        this.time_to_live = time_to_live;
    }
    /* setTimeToLive */

    public int hop ()
    {
        if (time_to_live > 0)
            {
                time_to_live -= 1;
            }
        return time_to_live;
    }
    /* hop */

    public void setSourceNode (Node source_node)
    {
        this.source_node = source_node;
    }
    /* setSourceNode */

    public void setDestinationNode (Node destination_node)
    {
        this.destination_node = destination_node;
    }
    /* setDestinationNode */

    public Node getSourceNode ()
    {
        return source_node;
    }
    /* getSourceNode */

    public Node getDestinationNode ()
    {
        return destination_node;
    }
    /* getDestinationNode */

    public boolean getDrawingFlag ()
    {
        return draw;
    }
    /* getDrawingFlag */

    public void setDrawingFlag (boolean flag)
    {
        draw = flag;
    }
    /* setDrawingFlag */

    public void paint (Graphics g, FontMetrics metrics, Color fill_color, int x, int y)
    {
        g.setColor(fill_color);
        g.fillOval(x, y, 8, 8);
        g.setColor(Color.black);
        g.drawOval(x, y, 8, 8);
    }
    /* paint */

}
/* Packet */

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