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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.

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package org.optaplanner.examples.nurserostering.persistence;

import java.io.IOException;
import java.time.format.DateTimeFormatter;

import org.jdom2.Element;
import org.optaplanner.examples.common.persistence.AbstractXmlSolutionExporter;
import org.optaplanner.examples.common.persistence.SolutionConverter;
import org.optaplanner.examples.nurserostering.app.NurseRosteringApp;
import org.optaplanner.examples.nurserostering.domain.NurseRoster;
import org.optaplanner.examples.nurserostering.domain.Shift;
import org.optaplanner.examples.nurserostering.domain.ShiftAssignment;

public class NurseRosteringExporter extends AbstractXmlSolutionExporter {

    public static void main(String[] args) {
        SolutionConverter converter = SolutionConverter.createExportConverter(NurseRosteringApp.DATA_DIR_NAME,
                new NurseRosteringExporter(), new NurseRosterSolutionFileIO());
        converter.convertAll();
    }

    @Override
    public XmlOutputBuilder createXmlOutputBuilder() {
        return new NurseRosteringOutputBuilder();
    }

    public static class NurseRosteringOutputBuilder extends XmlOutputBuilder {

        private NurseRoster nurseRoster;

        @Override
        public void setSolution(NurseRoster solution) {
            nurseRoster = solution;
        }

        @Override
        public void writeSolution() throws IOException {
            Element solutionElement = new Element("Solution");
            document.setRootElement(solutionElement);

            Element schedulingPeriodIDElement = new Element("SchedulingPeriodID");
            schedulingPeriodIDElement.setText(nurseRoster.getCode());
            solutionElement.addContent(schedulingPeriodIDElement);

            Element competitorElement = new Element("Competitor");
            competitorElement.setText("Geoffrey De Smet with OptaPlanner");
            solutionElement.addContent(competitorElement);

            Element softConstraintsPenaltyElement = new Element("SoftConstraintsPenalty");
            softConstraintsPenaltyElement.setText(Integer.toString(nurseRoster.getScore().softScore()));
            solutionElement.addContent(softConstraintsPenaltyElement);

            for (ShiftAssignment shiftAssignment : nurseRoster.getShiftAssignmentList()) {
                Shift shift = shiftAssignment.getShift();
                if (shift != null) {
                    Element assignmentElement = new Element("Assignment");
                    solutionElement.addContent(assignmentElement);

                    Element dateElement = new Element("Date");
                    dateElement.setText(shift.getShiftDate().getDate().format(DateTimeFormatter.ISO_DATE));
                    assignmentElement.addContent(dateElement);

                    Element employeeElement = new Element("Employee");
                    employeeElement.setText(shiftAssignment.getEmployee().getCode());
                    assignmentElement.addContent(employeeElement);

                    Element shiftTypeElement = new Element("ShiftType");
                    shiftTypeElement.setText(shift.getShiftType().getCode());
                    assignmentElement.addContent(shiftTypeElement);
                }
            }
        }
    }

}