Breaking News: Grepper is joining You.com. Read the official announcement!

plantuml java

Michal Janiš answered on June 28, 2022 Popularity 4/10 Helpfulness 3/10

answer plantuml java

plantuml java

Comment

import net.sourceforge.plantuml.FileFormat;
import net.sourceforge.plantuml.FileFormatOption;
import net.sourceforge.plantuml.SourceStringReader;
import net.sourceforge.plantuml.core.ImageData;
import net.sourceforge.plantuml.cucadiagram.Display;
import net.sourceforge.plantuml.sequencediagram.Message;
import net.sourceforge.plantuml.sequencediagram.Participant;
import net.sourceforge.plantuml.sequencediagram.SequenceDiagram;
import net.sourceforge.plantuml.sequencediagram.SequenceDiagramFactory;
import net.sourceforge.plantuml.skin.ArrowConfiguration;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import static com.google.common.base.Preconditions.checkState;

public class PlantUMLDemoMain {
    public static void main(String[] args) throws Exception {
        generateFromStringSource(new File("from-string.png"));
        generateFromApi(new File("from-api.png"));
    }

    private static void generateFromApi(File file) throws IOException {
        // 1. setup:
        SequenceDiagramFactory f = new SequenceDiagramFactory();
        SequenceDiagram diagram = f.createEmptyDiagram();

        // 2. Build the diagram:
        // "Bob -> Alice : hello"
        // See net.sourceforge.plantuml.sequencediagram.command.CommandArrow#executeArg
        Display bobD = Display.getWithNewlines("Bob");
        Participant bobP = diagram.getOrCreateParticipant("Bob", bobD);

        Display aliceD = Display.getWithNewlines("Alice");
        Participant aliceP = diagram.getOrCreateParticipant("Alice", aliceD);

        Display label = Display.getWithNewlines("hello");
        ArrowConfiguration config = ArrowConfiguration.withDirectionNormal();

        Message msg = new Message(bobP, aliceP, label, config, diagram.getNextMessageNumber());

        checkState(null == diagram.addMessage(msg));

        // 3. Output the diagram
        // See net.sourceforge.plantuml.SourceStringReader#generateImage
        diagram.makeDiagramReady();
        checkState(1 == diagram.getNbImages());
        try (OutputStream os = new FileOutputStream(file)) {
            ImageData imageData = diagram.exportDiagram(os, 0, new FileFormatOption(FileFormat.PNG));
            System.out.println("generateFromApi: " + diagram.getDescription().getDescription());
        }
    }

    private static void generateFromStringSource(File file) throws IOException {
        String source = "@startuml\n";
        source += "Bob -> Alice : hello\n";
        source += "@enduml\n";

        SourceStringReader reader = new SourceStringReader(source);
        // Write the first image to "png"
        String desc = reader.generateImage(file);
        // Return a null string if no generation
        System.out.println("generateFromStringSource: " + desc);
    }
}

Popularity 4/10 Helpfulness 3/10 Language java

Source: stackoverflow.com

Tags: java plantuml

Link to this answer
Share Copy Link

Contributed on Jun 28 2022

Michal Janiš

0 Answers Avg Quality 2/10

plantuml java

Contents

More Related Answers

plantuml java

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.