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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.persistence;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.io.InputStream;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.converters.reflection.FieldDictionary;
import com.thoughtworks.xstream.converters.reflection.NativeFieldKeySorter;
import com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider;
import org.drools.planner.benchmark.core.XStreamProblemIO;
import org.drools.planner.core.solution.Solution;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public abstract class XStreamSolutionDaoImpl implements SolutionDao {

    protected final transient Logger logger = LoggerFactory.getLogger(getClass());

    private XStreamProblemIO xStreamProblemIO;
    private String dirName;
    private File dataDir;

    public XStreamSolutionDaoImpl(String dirName, Class... xstreamAnnotations) {
        this.dirName = dirName;
        dataDir = new File("data/" + dirName);
        xStreamProblemIO = new XStreamProblemIO(xstreamAnnotations);
    }

    public String getDirName() {
        return dirName;
    }

    public File getDataDir() {
        return dataDir;
    }

    public Solution readSolution(File inputSolutionFile) {
        Solution solution = xStreamProblemIO.read(inputSolutionFile);
        postRead(solution);
        logger.info("Loaded: {}", inputSolutionFile);
        return solution;
    }

    protected void postRead(Solution solution) {
        // Do nothing
    }

    public void writeSolution(Solution solution, File outputSolutionFile) {
        xStreamProblemIO.write(solution, outputSolutionFile);
        logger.info("Saved: {}", outputSolutionFile);
    }

}