public void iteratorNext()
{
if (iterator.nextElement == null)
{
iterator = first;
}
else
{
iterator = iterator.nextElement;
}
}
public void addElement(OperationListElement element)
{
if (first == null)
{
first = element;
last = first;
}
else
{
last.nextElement = element;
element.previousElement = last;
last = element;
}
}
public void removeElement(OperationListElement element)
{
if (first == element)
{
element.operation.stop();
if (first.nextElement == null)
{
first = null;
last = null;
return;
}
first.nextElement.previousElement = null;
first = first.nextElement;
return;
}
OperationListElement iterator = first;
while (iterator.nextElement != null)
{
iterator = iterator.nextElement;
if (iterator == element)
{
iterator.operation.stop();
if (iterator.nextElement == null)
{
last = iterator.previousElement;
iterator.previousElement.nextElement = null;
return;
}
iterator.nextElement.previousElement = iterator.previousElement;
iterator.previousElement.nextElement = iterator.nextElement;
return;
}
}
}
public OperationList()
{
first = null;
last = null;
}
public void iteratorToStart()
{
iterator = first;
}