Pdf not being generated when using Dita OT in a Java Server ( utilising the Java API)

[IbrahimBhatty-Emumba]

Hi, I am facing an issue when trying to convert dita to pdf/html in a java server I have made specifically for transformations. Currently, I am working with absolute local directories as right now my goal is to simply see if the transformation works correctly. This is my code for the server:

package org.example;

import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpExchange;


import org.dita.dost.Processor;
import org.dita.dost.ProcessorFactory;

import java.io.*;
import java.net.InetSocketAddress;
import java.nio.file.Files;
import java.nio.file.StandardCopyOption;

public class DitaServer {
    private static final File OUTPUT_DIR = new File("output").getAbsoluteFile();

    public static void main(String[] args) throws IOException {
        if (!OUTPUT_DIR.exists()) {
            OUTPUT_DIR.mkdirs();
        }

        // Set the DITA_HOME environment variable
        String ditaHome = "C:/Users/Emumba/Desktop/Dita POC/dita-ot-4.2.3";
        System.out.println("DITA_HOME: " + ditaHome);
        System.setProperty("DITA_HOME", ditaHome);

        HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
        server.createContext("/convert", new ConvertHandler());
        server.setExecutor(null);
        server.start();
        System.out.println("Server started on port 8000");

        // Convert the hardcoded DITA map file
        convertDitaMap("sequence.ditamap");
    }
  private static void convertDitaMap(String ditaMapName) {
        // Set up the input DITA map file
        File inputDitaMapFile = new File("input", ditaMapName).getAbsoluteFile();
        if (!inputDitaMapFile.exists()) {
            // DITA map file not found
            System.err.println("DITA map file not found: " + ditaMapName);
            return;
        }

        // Set up the output directory (generic, in the root directory of the project)
        File outputDir = OUTPUT_DIR;

        // Set up DITA-OT Processor
        File ditaDir = new File("C:/Users/Emumba/Desktop/Dita POC/dita-ot-4.2.3");
        ProcessorFactory pf = ProcessorFactory.newInstance(ditaDir);
        pf.setBaseTempDir(OUTPUT_DIR); // Use the output directory as the temporary directory

        try {
            Processor pdfProcessor = pf.newProcessor("pdf")
                    .setInput(inputDitaMapFile)
                    .setOutputDir(outputDir)
                    .setProperty("nav-toc", "partial");
            pdfProcessor.run();
            System.out.println("Conversion to PDF completed");
        } catch (Exception e) {
            System.err.println("Error occurred during conversion to PDF: " + e.getMessage());
            e.printStackTrace();
        }

        // Convert to PDF2
        try {
            Processor pdf2Processor = pf.newProcessor("pdf2")
                    .setInput(inputDitaMapFile)
                    .setOutputDir(outputDir)
                    .setProperty("nav-toc", "partial");
            pdf2Processor.run();
            System.out.println("Conversion to PDF2 completed");
        } catch (Exception e) {
            System.err.println("Error occurred during conversion to PDF2: " + e.getMessage());
            e.printStackTrace();
        }
    }

}

This is my pom.xml file:

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>dita-java-server</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>22</maven.compiler.source>
        <maven.compiler.target>22</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <ditahome>C:/Users/Emumba/Desktop/Dita POC/dita-ot-4.2.3</ditahome>
    </properties>
    <scm>
        <connection>scm:git:https://github.com/dita-ot/dita-ot.git</connection>
        <developerConnection>scm:git:[email protected]:dita-ot/dita-ot.git</developerConnection>
        <url>https://github.com/dita-ot/dita-ot/</url>
    </scm>
    <dependencies>
        <!-- DITA-OT dependencies -->
        <dependency>
            <groupId>org.dita-ot</groupId>
            <artifactId>dost</artifactId>
            <version>${project.version}</version>
            <scope>system</scope>
            <systemPath>${ditahome}/lib/dost.jar</systemPath>
        </dependency>
        <!-- DITA-OT PDF plugin -->
        <dependency>
            <groupId>org.dita.plugin</groupId>
            <artifactId>fo</artifactId>
            <version>${project.version}</version>
            <scope>system</scope>
            <systemPath>${ditahome}/plugins/org.dita.pdf2/lib/fo.jar</systemPath>
        </dependency>
        <dependency>
            <groupId>org.dita.plugin</groupId>
            <artifactId>axf</artifactId>
            <version>${project.version}</version>
            <scope>system</scope>
            <systemPath>${ditahome}/plugins/org.dita.pdf2.axf/lib/axf.jar</systemPath>
        </dependency>
        <!-- DITA-OT HTML plugin -->
        <dependency>
            <groupId>org.dita.plugin</groupId>
            <artifactId>html</artifactId>
            <version>${project.version}</version>
            <scope>system</scope>
            <systemPath>${ditahome}/plugins/org.dita.html5/build_dita2html5.xml</systemPath>
        </dependency>
        <!-- Add other plugin dependencies if needed -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.8.0</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>xerces</groupId>
            <artifactId>xercesImpl</artifactId>
            <version>2.12.2</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>xml-apis</groupId>
            <artifactId>xml-apis</artifactId>
            <version>1.4.01</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>xml-resolver</groupId>
            <artifactId>xml-resolver</artifactId>
            <version>1.2</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>net.sf.saxon</groupId>
            <artifactId>Saxon-HE</artifactId>
            <version>12.4</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.xmlresolver</groupId>
            <artifactId>xmlresolver</artifactId>
            <version>5.2.3</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.ibm.icu</groupId>
            <artifactId>icu4j</artifactId>
            <version>74.2</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.10.14</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant-launcher</artifactId>
            <version>1.10.14</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>32.1.1-jre</version>
            <scope>runtime</scope>
            <exclusions>
                <exclusion>
                    <artifactId>j2objc-annotations</artifactId>
                    <groupId>com.google.j2objc</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>jsr305</artifactId>
                    <groupId>com.google.code.findbugs</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>listenablefuture</artifactId>
                    <groupId>com.google.guava</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>checker-qual</artifactId>
                    <groupId>org.checkerframework</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>error_prone_annotations</artifactId>
                    <groupId>com.google.errorprone</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>failureaccess</artifactId>
                    <groupId>com.google.guava</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>2.0.12</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.4.14</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.16.1</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.16.1</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-yaml</artifactId>
            <version>2.16.1</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.relaxng</groupId>
            <artifactId>jing</artifactId>
            <version>20220510</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant-apache-resolver</artifactId>
            <version>1.10.14</version>
            <scope>runtime</scope>
        </dependency>
    </dependencies>

    <!-- Add the dependencyManagement section here -->
    <!-- It should contain all the dependencies and their versions from the first pom.xml -->
</project>

Now I have dita installed and referenced as I know that the api needs the proper classpaths to work based on other discussions I have read on here. But when I run this code I get the error below:

Failed to read print transtypes from configuration, using defaults.
Failed to read transtypes from configuration, using empty list.
Error occurred during conversion to PDF: Transtype pdf not supported
java.lang.IllegalArgumentException: Transtype pdf not supported

I have checked the transtypes using the console and they are there. Any help or clarification would be greatly appreciated.

Regards,
Ibrahim