IrreducibleDecomAction.cpp

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/* Frobby: Software for monomial ideal computations.
   Copyright (C) 2007 Bjarke Hammersholt Roune (www.broune.com)
 
   This program 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 2 of the License, or
   (at your option) any later version.
 
   This program 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 this program.  If not, see http://www.gnu.org/licenses/.
*/
#include "stdinc.h"
#include "IrreducibleDecomAction.h"
 
#include "SliceFacade.h"
#include "SliceParams.h"
#include "DataType.h"
 
IrreducibleDecomAction::IrreducibleDecomAction():
  Action
(staticGetName(),
 "Compute the irreducible decomposition of the input ideal.",
 "Compute the irredundant irreducible decomposition of the input monomial "
 "ideal.\n\n"
 "The decomposition is computed using the Slice Algorithm. This algorithm is\n"
 "described in the paper `The Slice Algorithm For Irreducible Decomposition "
 "of\n"
 "Monomial Ideals', which is available at www.broune.com .",
 false),
 
  _encode("encode",
          "Encode the decomposition as monomials generating an ideal.",
          false),
 
  _io(DataType::getMonomialIdealType(), DataType::getMonomialIdealType()) {
}
 
void IrreducibleDecomAction::obtainParameters(vector<Parameter*>& parameters) {
  _io.obtainParameters(parameters);
  parameters.push_back(&_encode);
  _sliceParams.obtainParameters(parameters);
  Action::obtainParameters(parameters);
}
 
void IrreducibleDecomAction::perform() {
  SliceParams params(_params);
  validateSplit(params, true, false);
  const DataType& output = _encode ?
    DataType::getMonomialIdealType() :
    DataType::getMonomialIdealListType();
  SliceFacade facade(params, output);
  facade.computeIrreducibleDecomposition(_encode);
}
 
const char* IrreducibleDecomAction::staticGetName() {
  return "irrdecom";
}