Use default parameters if json file does not specify all.

Throw exception if json file cannot be parsed.
This commit is contained in:
Tong Dong Qiu 2021-07-09 14:07:51 +02:00
parent aa63da2bd3
commit b0749ce7d4

View File

@ -76,10 +76,31 @@ void amgclSolverBackend<block_size>::initialize(int N_, int nnz_, int dim) {
std::string backend_type_string; std::string backend_type_string;
if (file.is_open()) { // if file exists, read parameters from file if (file.is_open()) { // if file exists, read parameters from file
boost::property_tree::read_json(file, prm); try {
boost::property_tree::read_json(file, prm);
} catch (boost::property_tree::json_parser::json_parser_error e) {
OPM_THROW(std::logic_error, "Error cannot parse json file '" + filename + "'");
}
backend_type_string = prm.get("backend_type", "cpu"); // defaults to cpu if not specified // the prm.get reads data from the file, with default values if not specified
out << "Using parameters from " << filename << ":\n"; // the prm.put puts the data in the property_tree, so it gets printed
backend_type_string = prm.get("backend_type", "cpu");
prm.put("backend_type", backend_type_string);
std::string t1 = prm.get("precond.class", "relaxation");
prm.put("precond.class", t1);
t1 = prm.get("precond.type", "ilu0");
prm.put("precond.type", t1);
double t2 = prm.get("precond.damping", 0.9);
prm.put("precond.damping", t2);
t1 = prm.get("solver.type", "bicgstab");
prm.put("solver.type", t1);
t2 = prm.get("solver.tol", tolerance);
prm.put("solver.tol", t2);
int t3 = prm.get("solver.maxiter", maxit);
prm.put("solver.maxiter", t3);
bool t4 = prm.get("solver.verbose", verbosity >= 2);
prm.put("solver.verbose", t4);
out << "Using parameters from " << filename << " (with default values for omitted parameters):\n";
} else { // otherwise use default parameters, same as Dune } else { // otherwise use default parameters, same as Dune
prm.put("backend_type", "cpu"); // put it in the tree so it gets printed prm.put("backend_type", "cpu"); // put it in the tree so it gets printed
prm.put("precond.class", "relaxation"); prm.put("precond.class", "relaxation");