void
ProblemsReader::readConstraint(Problem& problem, unsigned int /*i*/) {
LinearConstraint constraint;
double value;
char rel[2];
unsigned int numVariables;
*_stream >> value >> rel >> numVariables;
Relation relation;
if (rel[0] == '<')
relation = GreaterEqual; // switch relation, since in file: value rel term
else if (rel[0] == '>')
relation = LessEqual; // switch relation, since in file: value rel term
else
relation = Equal;
constraint.setRelation(relation);
constraint.setValue(value);
for (unsigned int j = 0; j < numVariables; j++) {
int id;
*_stream >> id;
if (id >= 0) {
unsigned int varNum = problem.getConfiguration()->getVariable(id);
constraint.setCoefficient(varNum, 1.0);
} else {
unsigned int varNum = problem.getConfiguration()->getVariable(-id);
constraint.setCoefficient(varNum, -1.0);
}
}
problem.getLinearConstraints()->add(constraint);
LOG_ALL(streamproblemreaderlog) << "found constraint " << constraint << std::endl;
}
void
ProblemsReader::readVariable(Problem& problem, unsigned int i) {
unsigned int id;
float costs;
*_stream >> id;
*_stream >> costs;
LOG_ALL(streamproblemreaderlog) << "found variable " << i << " (id " << id << ") with costs " << costs << std::endl;
// set costs in objective
problem.getObjective()->setCoefficient(i, costs);
// remember mapping from id to variable num
problem.getConfiguration()->setVariable(id, i);
}