Master of Science thesis Fighting Spam

{
//Performance variables
private final int initialVectorSize = 10;
private final int incrementVectorSize = 10;
//When was the list updated
private long lastUpdate;
public Vector elements;
public Blacklist(Vector list)
{
elements = list;
updatedList();
}
public Blacklist()
{
elements = new Vector(initialVectorSize,incrementVectorSize);
}
public Blacklist(int initialSize)
{
elements = new Vector(initialSize,incrementVectorSize);
}
public void merge(Blacklist b)
{
Enumeration e = b.elements.elements();
while(e.hasMoreElements())
{
add((Certificate)e.nextElement());
}
updatedList();
}
public void add(Certificate cert)
{
if(!onBlacklist(cert))
elements.addElement(cert);
}
public void remove(Certificate cert)
{
elements.removeElement(cert);
}
public boolean onBlacklist(Certificate cert)
{
return elements.contains(cert);
}
public Blacklist getFromIndex(int index)
{
//Blacklist copy = new Blacklist(elements.size()-index);
//Enumeration e = elements.elements();
//while(e.hasMoreElements())
//{
// copy.add((Certificate)e.nextElement());
//}
//return new Blacklist((Vector)elements.subList(index,elements.size()));
}
return this;
private void updatedList()
{
lastUpdate = System.currentTimeMillis();
}
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