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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 2015 Red Hat, Inc. and/or its affiliates.
 *
 * 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.common.persistence;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.apache.commons.io.FilenameUtils;
import org.optaplanner.core.api.domain.solution.PlanningSolution;

/**
 * @param  the solution type, the class with the {@link PlanningSolution} annotation
 */
public abstract class AbstractPngSolutionImporter extends AbstractSolutionImporter {

    private static final String DEFAULT_INPUT_FILE_SUFFIX = "png";

    @Override
    public String getInputFileSuffix() {
        return DEFAULT_INPUT_FILE_SUFFIX;
    }

    public abstract PngInputBuilder createPngInputBuilder();

    @Override
    public Solution_ readSolution(File inputFile) {
        try {
            BufferedImage image = ImageIO.read(inputFile);
            PngInputBuilder pngInputBuilder = createPngInputBuilder();
            pngInputBuilder.setInputFile(inputFile);
            pngInputBuilder.setImage(image);
            try {
                Solution_ solution = pngInputBuilder.readSolution();
                logger.info("Imported: {}", inputFile);
                return solution;
            } catch (IllegalArgumentException | IllegalStateException e) {
                throw new IllegalArgumentException("Exception in inputFile (" + inputFile + ")", e);
            }
        } catch (IOException e) {
            throw new IllegalArgumentException("Could not read the file (" + inputFile.getName() + ").", e);
        }
    }

    public static abstract class PngInputBuilder extends InputBuilder {

        protected File inputFile;
        protected BufferedImage image;

        public void setInputFile(File inputFile) {
            this.inputFile = inputFile;
        }

        public void setImage(BufferedImage image) {
            this.image = image;
        }

        public abstract Solution_ readSolution() throws IOException;

        // ************************************************************************
        // Helper methods
        // ************************************************************************

        public String getInputId() {
            return FilenameUtils.getBaseName(inputFile.getPath());
        }
    }

}