/**
* Internally initializes and resets the parameters used by GLPK. If you want to set specific GLPK
* parameters, you'll need to call a specialized function. //TODO make this possible...
*/
public void setParameters() {
simParam = new glp_smcp();
GLPK.glp_init_smcp(simParam);
intParam = new glp_iptcp();
GLPK.glp_init_iptcp(intParam);
GLPK.glp_init_smcp(simParam);
GLPK.glp_init_iptcp(intParam);
// assume lpsolver == 1, and the rest = default, for now.
// remap of control parameters for simplex method
simParam.setMsg_lev(GLPKConstants.GLP_MSG_OFF);
intParam.setMsg_lev(GLPKConstants.GLP_MSG_OFF);
// simplex method: primal/dual
switch (GLPIntParam[2]) {
case 0:
simParam.setMeth(GLPKConstants.GLP_PRIMAL);
break;
case 1:
simParam.setMeth(GLPKConstants.GLP_DUAL);
break;
case 2:
simParam.setMeth(GLPKConstants.GLP_DUALP);
break;
default:
break;
}
// pricing technique
if (GLPIntParam[3] == 0) simParam.setPricing(GLPKConstants.GLP_PT_STD);
else simParam.setPricing(GLPKConstants.GLP_PT_PSE);
// ratio test
if (GLPIntParam[20] == 0) simParam.setR_test(GLPKConstants.GLP_RT_STD);
else simParam.setR_test(GLPKConstants.GLP_RT_HAR);
// tolerances
simParam.setTol_bnd(GLPRealParam[1]); // primal feasible tolerance
simParam.setTol_dj(GLPRealParam[2]); // dual feasible tolerance
simParam.setTol_piv(GLPRealParam[3]); // pivot tolerance
simParam.setObj_ll(GLPRealParam[4]); // lower limit
simParam.setObj_ul(GLPRealParam[5]); // upper limit
// iteration limit
if (GLPIntParam[5] == -1) simParam.setIt_lim(Integer.MAX_VALUE);
else simParam.setIt_lim(GLPIntParam[5]);
// time limit
if (GLPRealParam[6] == -1) simParam.setTm_lim(Integer.MAX_VALUE);
else simParam.setTm_lim((int) GLPRealParam[6]);
simParam.setOut_frq(GLPIntParam[7]); // output frequency
simParam.setOut_dly((int) GLPRealParam[7]); // output delay
// presolver
if (GLPIntParam[16] != 0) simParam.setPresolve(GLPK.GLP_ON);
else simParam.setPresolve(GLPK.GLP_OFF);
}
