super(AuctionMarkConstants.TABLENAME_CATEGORY);
this.data_file = data_file;
assert(this.data_file.exists()) :
"The data file for the category generator does not exist: " + this.data_file;
this.categoryMap = (new AuctionMarkCategoryParser(data_file)).getCategoryMap();
this.tableSize = (long)this.categoryMap.size();
}