/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.planner.examples.nurserostering.solver;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.commons.io.IOUtils;
import org.drools.RuleBase;
import org.drools.RuleBaseConfiguration;
import org.drools.RuleBaseFactory;
import org.drools.WorkingMemory;
import org.drools.compiler.DroolsParserException;
import org.drools.compiler.PackageBuilder;
import org.drools.planner.core.localsearch.LocalSearchSolverScope;
import org.drools.planner.core.score.Score;
import org.drools.planner.core.score.calculator.DefaultHardAndSoftConstraintScoreCalculator;
import org.drools.planner.examples.common.app.LoggingTest;
import org.drools.planner.examples.nurserostering.domain.Assignment;
import org.drools.planner.examples.nurserostering.domain.Employee;
import org.drools.planner.examples.nurserostering.domain.NurseRoster;
import org.drools.planner.examples.nurserostering.persistence.NurseRosteringDaoImpl;
import org.drools.planner.examples.nurserostering.solver.move.NurseRosteringMoveHelper;
import org.junit.Test;
import static org.junit.Assert.*;
public class NurseRosteringScoreRulesTest extends LoggingTest {
@Test
public void switchEmployeeAndUndo() {
LocalSearchSolverScope localSearchSolverScope = new LocalSearchSolverScope();
localSearchSolverScope.setRuleBase(buildRuleBase());
localSearchSolverScope.setWorkingScoreCalculator(new DefaultHardAndSoftConstraintScoreCalculator());
NurseRoster nurseRoster = (NurseRoster) new NurseRosteringDaoImpl().readSolution(getClass().getResourceAsStream(
"/org/drools/planner/examples/nurserostering/data/testNurseRosteringScoreRules.xml"));
localSearchSolverScope.setWorkingSolution(nurseRoster);
WorkingMemory workingMemory = localSearchSolverScope.getWorkingMemory();
Score firstScore = localSearchSolverScope.calculateScoreFromWorkingMemory();
// do AssignmentSwitchMove
Employee leftEmployee = findEmployeeById(nurseRoster, 0L);
Assignment leftAssignment = findAssignmentById(nurseRoster, 200204001L);
assertEquals(leftEmployee, leftAssignment.getEmployee());
Employee rightEmployee = findEmployeeById(nurseRoster, 12L);
Assignment rightAssignment = findAssignmentById(nurseRoster, 200204002L);
assertEquals(rightEmployee, rightAssignment.getEmployee());
NurseRosteringMoveHelper.moveEmployee(workingMemory, leftAssignment, rightEmployee);
NurseRosteringMoveHelper.moveEmployee(workingMemory, rightAssignment, leftEmployee);
localSearchSolverScope.calculateScoreFromWorkingMemory();
// undo AssignmentSwitchMove;
NurseRosteringMoveHelper.moveEmployee(workingMemory, rightAssignment, rightEmployee);
NurseRosteringMoveHelper.moveEmployee(workingMemory, leftAssignment, leftEmployee);
Score secondScore = localSearchSolverScope.calculateScoreFromWorkingMemory();
assertEquals(firstScore, secondScore);
}
private RuleBase buildRuleBase() {
PackageBuilder packageBuilder = new PackageBuilder();
InputStream scoreDrlIn = getClass().getResourceAsStream("/org/drools/planner/examples/nurserostering/solver/nurseRosteringScoreRules.drl");
try {
packageBuilder.addPackageFromDrl(new InputStreamReader(scoreDrlIn, "utf-8"));
} catch (DroolsParserException e) {
throw new IllegalArgumentException("scoreDrl could not be loaded.", e);
} catch (IOException e) {
throw new IllegalArgumentException("scoreDrl could not be loaded.", e);
} finally {
IOUtils.closeQuietly(scoreDrlIn);
}
RuleBaseConfiguration ruleBaseConfiguration = new RuleBaseConfiguration();
RuleBase ruleBase = RuleBaseFactory.newRuleBase(ruleBaseConfiguration);
if (packageBuilder.hasErrors()) {
throw new IllegalStateException("There are errors in the scoreDrl:"
+ packageBuilder.getErrors().toString());
}
ruleBase.addPackage(packageBuilder.getPackage());
return ruleBase;
}
private Employee findEmployeeById(NurseRoster nurseRoster, long id) {
for (Employee employee : nurseRoster.getEmployeeList()) {
if (employee.getId() == id) {
return employee;
}
}
throw new IllegalArgumentException("Invalid id (" + id + ")");
}
private Assignment findAssignmentById(NurseRoster nurseRoster, long id) {
for (Assignment assignment : nurseRoster.getAssignmentList()) {
if (assignment.getId() == id) {
return assignment;
}
}
throw new IllegalArgumentException("Invalid id (" + id + ")");
}
}