DirectoryWorkTypeItem item = workTypes.get(rowIndex);
switch (columnIndex) {
case COL_ID : return item.getID();
case COL_TITLE: return item;
case COL_AVAILIABLE: return item.isAvailiable();
case COL_CANBEOVERLAPPED: return item.canBeOverlapped();
case COL_HIGHLIGHT: return item.getColorHightlight();
case COL_SHADOW: return item.getColorShadow();
case COL_TIME: return item.timeToString();
default: return null;
}