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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.solver.move;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Objects;

import org.optaplanner.core.api.score.director.ScoreDirector;
import org.optaplanner.core.impl.heuristic.move.AbstractMove;
import org.optaplanner.examples.nurserostering.domain.Employee;
import org.optaplanner.examples.nurserostering.domain.NurseRoster;
import org.optaplanner.examples.nurserostering.domain.ShiftAssignment;

public class EmployeeMultipleChangeMove extends AbstractMove {

    private Employee fromEmployee;
    private List shiftAssignmentList;
    private Employee toEmployee;

    public EmployeeMultipleChangeMove(Employee fromEmployee, List shiftAssignmentList, Employee toEmployee) {
        this.fromEmployee = fromEmployee;
        this.shiftAssignmentList = shiftAssignmentList;
        this.toEmployee = toEmployee;
    }

    @Override
    public boolean isMoveDoable(ScoreDirector scoreDirector) {
        return !Objects.equals(fromEmployee, toEmployee);
    }

    @Override
    public EmployeeMultipleChangeMove createUndoMove(ScoreDirector scoreDirector) {
        return new EmployeeMultipleChangeMove(toEmployee, shiftAssignmentList, fromEmployee);
    }

    @Override
    protected void doMoveOnGenuineVariables(ScoreDirector scoreDirector) {
        for (ShiftAssignment shiftAssignment : shiftAssignmentList) {
            if (!shiftAssignment.getEmployee().equals(fromEmployee)) {
                throw new IllegalStateException("The shiftAssignment (" + shiftAssignment + ") should have the same employee ("
                        + shiftAssignment.getEmployee() + ") as the fromEmployee (" + fromEmployee + ").");
            }
            NurseRosteringMoveHelper.moveEmployee(scoreDirector, shiftAssignment, toEmployee);
        }
    }

    @Override
    public EmployeeMultipleChangeMove rebase(ScoreDirector destinationScoreDirector) {
        return new EmployeeMultipleChangeMove(destinationScoreDirector.lookUpWorkingObject(fromEmployee),
                rebaseList(shiftAssignmentList, destinationScoreDirector),
                destinationScoreDirector.lookUpWorkingObject(toEmployee));
    }

    @Override
    public Collection getPlanningEntities() {
        return Collections.singletonList(shiftAssignmentList);
    }

    @Override
    public Collection getPlanningValues() {
        return Arrays.asList(fromEmployee, toEmployee);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final EmployeeMultipleChangeMove other = (EmployeeMultipleChangeMove) o;
        return Objects.equals(fromEmployee, other.fromEmployee) &&
                Objects.equals(shiftAssignmentList, other.shiftAssignmentList) &&
                Objects.equals(toEmployee, other.toEmployee);
    }

    @Override
    public int hashCode() {
        return Objects.hash(fromEmployee, shiftAssignmentList, toEmployee);
    }

    @Override
    public String toString() {
        return shiftAssignmentList + " {? -> " + toEmployee + "}";
    }

}