[SOLVED] Unable to convert ODT to PDF with xdocreport

Unable to convert ODT to PDF with xdocreport

I'm trying to use the xdocreport package to convert an ODT file into a PDF. I've tried 2 different variations. Here is the code and error for both variations:

Options options = Options.getFrom(DocumentKind.ODT).to(ConverterTypeTo.PDF);

InputStream raw = this.getResources().openRawResource(R.raw.timesheet_template);
IXDocReport xdocGenerator = XDocReportRegistry.getRegistry().loadReport(raw, TemplateEngineKind.Freemarker);

IContext context = xdocGenerator.createContext();
IConverter converter = ConverterRegistry.getRegistry().getConverter(options);

OutputStream out = new FileOutputStream(HOME_PATH+"/test.pdf");

xdocGenerator.convert(context, options, out);

raw.close();
out.close();

ERROR:

fr.opensagres.xdocreport.core.XDocReportException: Null template engine. Set template engine with IXDocReport#setTemplateEngine.

Other method:

Options options = Options.getFrom(DocumentKind.ODT).to(ConverterTypeTo.PDF);

IConverter converter = ConverterRegistry.getRegistry().getConverter(options);

InputStream raw = this.getResources().openRawResource(R.raw.timesheet_template);
OutputStream out = new FileOutputStream(HOME_PATH+"/test.pdf");

converter.convert(raw, out, options);

raw.close();
out.close();

ERROR:

java.lang.NullPointerException: Attempt to invoke interface method 'void fr.opensagres.xdocreport.converter.IConverter.convert(java.io.InputStream, java.io.OutputStream, fr.opensagres.xdocreport.converter.Options)' on a null object reference

From reading online and the errors themselves I believe there is an underlying dependency that is not available by default in android. I don't know what it is or how to include it though.

An important thing to note is I was able to accomplish this without issue using Aspose library. They have a water mark though which is why I want to use xdocreport.

I'm importing the following in gradle:

implementation 'fr.opensagres.xdocreport:fr.opensagres.xdocreport.document.odt:2.1.0'

Any help would be appreciated.

ANSWER: Based on the accepted answer, here's how I made it work. First the gradle dependencies are as fallows:

implementation 'fr.opensagres.xdocreport:fr.opensagres.xdocreport.document.odt:2.1.0'
implementation 'fr.opensagres.xdocreport:fr.opensagres.xdocreport.template.freemarker:2.1.0'
implementation 'fr.opensagres.xdocreport:fr.opensagres.xdocreport.converter.odt.odfdom:2.1.0'
implementation 'ro.andob.androidawt:androidawt:1.0.4'

You will also need the following in android section:

configurations {
    all { // You should exclude one of them not both of them
        exclude group: "com.sun.activation", module: "jakarta.activation"
    }
}

In settings.gradle under repositories for both pluginManagement and dependencyResolutionManagement add the following:

maven { url "https://andob.io/repository/open_source" }

I'm not sure if this is required, but I added the following in proguard-rules.pro:

-dontwarn org.bouncycastle.**
-dontwarn java.lang.invoke.**

The code is the same as in the question. This setup will resolve the duplicate class issue, add the converter for XDocReport to use and add the java.awt dependencies.

Solution

Your errors happen because required dependencies are missing. To fix it add these to your build.gradle

implementation 'fr.opensagres.xdocreport:fr.opensagres.xdocreport.template.freemarker:2.1.0'
implementation 'fr.opensagres.xdocreport:fr.opensagres.xdocreport.converter.odt.odfdom:2.1.0'

These provide the Freemarker engine and ODT→PDF converter. Once added, your code should work unless it hits AWT-related classes not supported on Android, in which case XDocReport may not be usable on-device.