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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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/*
 * 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.optaplanner.examples.nqueens.domain;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.annotations.XStreamConverter;
import org.optaplanner.core.api.domain.solution.PlanningEntityCollectionProperty;
import org.optaplanner.core.api.domain.solution.PlanningSolution;
import org.optaplanner.core.api.domain.solution.Solution;
import org.optaplanner.core.api.domain.valuerange.ValueRangeProvider;
import org.optaplanner.core.api.score.buildin.simple.SimpleScore;
import org.optaplanner.core.impl.score.buildin.simple.SimpleScoreDefinition;
import org.optaplanner.examples.common.domain.AbstractPersistable;
import org.optaplanner.persistence.xstream.impl.score.XStreamScoreConverter;

@PlanningSolution
@XStreamAlias("NQueens")
public class NQueens extends AbstractPersistable implements Solution {

    private int n;

    // Problem facts
    private List columnList;
    private List rowList;

    // Planning entities
    private List queenList;

    @XStreamConverter(value = XStreamScoreConverter.class, types = {SimpleScoreDefinition.class})
    private SimpleScore score;

    public int getN() {
        return n;
    }

    public void setN(int n) {
        this.n = n;
    }

    public List getColumnList() {
        return columnList;
    }

    public void setColumnList(List columnList) {
        this.columnList = columnList;
    }

    @ValueRangeProvider(id = "rowRange")
    public List getRowList() {
        return rowList;
    }

    public void setRowList(List rowList) {
        this.rowList = rowList;
    }

    @PlanningEntityCollectionProperty
    public List getQueenList() {
        return queenList;
    }

    public void setQueenList(List queenList) {
        this.queenList = queenList;
    }

    public SimpleScore getScore() {
        return score;
    }

    public void setScore(SimpleScore score) {
        this.score = score;
    }

    // ************************************************************************
    // Complex methods
    // ************************************************************************

    public Collection getProblemFacts() {
        List