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Drools Planner optimizes automated planning by combining metaheuristic search algorithms with rule engine powered score calculation. This is the drools-planner-examples module which contains examples on how to use Drools Planner.

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/*
 * 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.common.app;

import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

import org.drools.planner.core.Solver;
import org.drools.planner.examples.common.business.SolutionBusiness;
import org.drools.planner.examples.common.persistence.AbstractSolutionExporter;
import org.drools.planner.examples.common.persistence.AbstractSolutionImporter;
import org.drools.planner.examples.common.persistence.SolutionDao;
import org.drools.planner.examples.common.swingui.SolutionPanel;
import org.drools.planner.examples.common.swingui.SolverAndPersistenceFrame;
import org.drools.planner.examples.nurserostering.swingui.NurseRosteringPanel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.awt.*;

public abstract class CommonApp extends LoggingMain {

    protected static final Logger logger = LoggerFactory.getLogger(CommonApp.class);

    /**
     * Some examples are not compatible with every native LookAndFeel.
     * For example, {@link NurseRosteringPanel} is incompatible with Mac.
     */
    public static void fixateLookAndFeel() {
        String lookAndFeelName = "Metal"; // "Nimbus" is nicer but incompatible
        Exception lookAndFeelException;
        try {
            for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
                if (lookAndFeelName.equals(info.getName())) {
                    UIManager.setLookAndFeel(info.getClassName());
                    return;
                }
            }
            lookAndFeelException = null;
        } catch (UnsupportedLookAndFeelException e) {
            lookAndFeelException = e;
        } catch (ClassNotFoundException e) {
            lookAndFeelException = e;
        } catch (InstantiationException e) {
            lookAndFeelException = e;
        } catch (IllegalAccessException e) {
            lookAndFeelException = e;
        }
        logger.warn("Could not switch to lookAndFeel (" + lookAndFeelName + "). Layout might be incorrect.",
                lookAndFeelException);
    }

    private SolverAndPersistenceFrame solverAndPersistenceFrame;
    private SolutionBusiness solutionBusiness;

    public CommonApp() {
        solutionBusiness = createSolutionBusiness();
        solverAndPersistenceFrame = new SolverAndPersistenceFrame(
                solutionBusiness, createSolutionPanel(), solutionBusiness.getDirName());
    }

    public void init() {
        init(null, true);
    }

    public void init(Component centerForComponent, boolean exitOnClose) {
        solverAndPersistenceFrame.setDefaultCloseOperation(exitOnClose ? JFrame.EXIT_ON_CLOSE : JFrame.DISPOSE_ON_CLOSE);
        solverAndPersistenceFrame.init(centerForComponent);
        solverAndPersistenceFrame.setVisible(true);
    }

    public SolutionBusiness createSolutionBusiness() {
        SolutionDao solutionDao = createSolutionDao();
        SolutionBusiness solutionBusiness = new SolutionBusiness();
        solutionBusiness.setSolutionDao(solutionDao);
        solutionBusiness.setImporter(createSolutionImporter());
        solutionBusiness.setExporter(createSolutionExporter());
        solutionBusiness.updateDataDirs();
        solutionBusiness.setSolver(createSolver());
        return solutionBusiness;
    }

    protected abstract Solver createSolver();

    protected abstract SolutionPanel createSolutionPanel();

    protected abstract SolutionDao createSolutionDao();

    protected AbstractSolutionImporter createSolutionImporter() {
        return null;
    }

    protected AbstractSolutionExporter createSolutionExporter() {
        return null;
    }

}