#  addAlgorithm.R
#  FBA and friends with R.
#
#  Copyright (C) 2010-2014 Gabriel Gelius-Dietrich, Dpt. for Bioinformatics,
#  Institute for Informatics, Heinrich-Heine-University, Duesseldorf, Germany.
#  All right reserved.
#  Email: geliudie@uni-duesseldorf.de
#  
#  This file is part of sybil.
#
#  Sybil is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  Sybil is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with sybil.  If not, see <http://www.gnu.org/licenses/>.


################################################
# Function: addAlgorithm
#
#
#

addAlgorithm <- function(alg, purpose) {
  
    stopifnot(inherits(alg, "character"),
              inherits(purpose, "character"),
              (length(alg) == 1),
              (length(purpose) == 1))


    if (alg %in% .SYBILenv$algorithm[[purpose]]) {
        stop("algorithm ", sQuote(alg), " already exists")
    }
    else {
        .SYBILenv$algorithm[[purpose]] <- append(.SYBILenv$algorithm[[purpose]], alg)
    }
        
    return(invisible(NULL))

}