public CategoryExplorerLogRecordFilter(CategoryExplorerModel model) 
{
    _model = model;
}

 public boolean passes(LogRecord record) 
{
    CategoryPath path = new CategoryPath(record.getCategory());
    return _model.isCategoryPathActive(path);
}

 public  void reset() 
{
    resetAllNodes();
}

Resets the counters for the contained CategoryNodes to zero.

 protected  void resetAllNodes() 
{
    Enumeration nodes = _model.getRootCategoryNode().depthFirstEnumeration();
    CategoryNode current;
    while (nodes.hasMoreElements()) {
      current = (CategoryNode) nodes.nextElement();
      current.resetNumberOfContainedRecords();
      _model.nodeChanged(current);
    }
}