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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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package org.optaplanner.examples.tsp.persistence;

import java.io.IOException;

import org.optaplanner.examples.common.persistence.AbstractTxtSolutionExporter;
import org.optaplanner.examples.tsp.domain.Standstill;
import org.optaplanner.examples.tsp.domain.TspSolution;
import org.optaplanner.examples.tsp.domain.Visit;
import org.optaplanner.examples.tsp.domain.location.Location;

/**
 * Common base for the SVG exporters with some helpers
 *
 * @author hrupp
 */
public abstract class AbstractSvgTspOutputBuilder extends AbstractTxtSolutionExporter.TxtOutputBuilder {

    double width = 0;
    double height = 0;
    double offsetX = 0;
    double offsetY = 0;

    void writeSvgHeader() throws IOException {
        bufferedWriter.write("\n");
        bufferedWriter.write(
                "\n");
    }

    void determineSizeAndOffset(TspSolution solution) {
        Standstill standstill = solution.getDomicile();
        while (standstill != null) {
            Location location = standstill.getLocation();
            if (location.getLongitude() > width) {
                width = location.getLongitude();
            }
            if (location.getLatitude() > height) {
                height = location.getLatitude();
            }
            if (location.getLongitude() < offsetX) {
                offsetX = location.getLongitude();
            }
            if (location.getLatitude() < offsetY) {
                offsetY = location.getLatitude();
            }
            standstill = findNextVisit(standstill);
        }
        // We provide a slightly bigger canvas
        height *= 1.05;
        width *= 1.05;
        offsetY = -offsetY;
        offsetX = -offsetX;
    }

    Visit findNextVisit(Standstill standstill) {
        for (Visit visit : solution.getVisitList()) {
            if (visit.getPreviousStandstill() == standstill) {
                return visit;
            }
        }
        return null;
    }

}




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