/***************************************************************************************\ * Name: MipSolPool.java Fair Isaac 13/06/2008 * * Purpose: All solutions with the MIP solution pool * * Description: We take the power generation problem stored in hpw15.mps which seeks to * * optimise the operating pattern of a group of electricity generators. We * * solve the problem collecting all solutions found during the MIP search. * * The optimal solution's objective and solution values are printed to * * screen. * * Input: hpw15.mps * \***************************************************************************************/ import java.io.*; import com.dashoptimization.*; public class MipSolPool { public static void main(String[] args) throws Exception { String model = args.length == 0 ? "../data/hpw15" : args[0]; try (XPRSprob prob = new XPRSprob(null)) { prob.addMsgHandlerListener(System.out); XPRSmipsolpool msp = new XPRSmipsolpool(); msp.probAttach(prob); prob.readProb(model); prob.mipOptimize("g"); int nSols = msp.attributes().getSolutions(); if (nSols>0) { IntHolder iSolutionId = new IntHolder(); DoubleHolder dObj = new DoubleHolder(); msp.getDblAttribProbExtreme(prob,0,iSolutionId, XPRS.MSP_SOLPRB_OBJ, dObj); System.out.println("Optimal Solution ID: " + iSolutionId.value); System.out.println("Optimal Objective : " + dObj.value); int nCols = msp.getIntAttribSol(iSolutionId.value, null, XPRS.MSP_SOL_COLS); for (int i=0;i<nCols;i++) {
					double[] dSol = new double[1];
					msp.getSol(iSolutionId.value,null,dSol,i,i,null);
					System.out.println(i + " = " + dSol[0]);
				}
			}

		}
	}
}