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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 2021 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * 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.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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