/**
* Thread's off a task to determine whether the resource is local or remote and then retrieves it
* either from disk cache or a remote server.
*
* @param dc the current draw context.
*/
protected void requestResource(DrawContext dc) {
if (WorldWind.getTaskService().isFull()) return;
KMLLink link = this.model.getLink();
if (link == null) return;
String address = link.getAddress(dc);
if (address != null) address = address.trim();
if (WWUtil.isEmpty(address)) return;
WorldWind.getTaskService().addTask(new RequestTask(this, address));
}
