RML Mapper Java embedded - example not working

[ghost]

Hi!

I'd like to use the rml-mapper as part of a Java project. I included the rmlmapper 4.10 in my pom.xml and tried to run the example provided here.

Unfortunately, it does not produce a turtle file, but fails on QuadStore result = executor.executeV5(null).get(new NamedNode("rmlmapper://default.store")); with this error message:

Exception in thread "main" java.lang.NullPointerException at java.base/java.io.File.<init>(File.java:276) at org.apache.commons.io.FileUtils.getFile(FileUtils.java:212) at be.ugent.rml.access.LocalFileAccess.getInputStream(LocalFileAccess.java:40) at be.ugent.rml.records.IteratorFormat.getRecords(IteratorFormat.java:41) at be.ugent.rml.records.RecordsFactory.getRecords(RecordsFactory.java:136) at be.ugent.rml.records.RecordsFactory.createRecords(RecordsFactory.java:70) at be.ugent.rml.Executor.getRecords(Executor.java:409) at be.ugent.rml.Executor.executeWithFunctionV5(Executor.java:153) at be.ugent.rml.Executor.executeV5(Executor.java:140) at be.ugent.rml.Executor.executeV5(Executor.java:230) at start.rmlMapperExample(start.java:116) at start.main(start.java:23)

I also tried to replace to the inputStream with directly reading the file, which results in the same error. It works perfectly fine when I run the jar on the commandline.

Could you please advise on how to get the code running?

Thank you!

[DylanVanAssche]

Hi @airkangoo, Thank you for your interest in RML!

The Java file you linked is an unit test, could you share your example code itself which you try to get running?

[ghost]

@DylanVanAssche

Thanks for your response. In the meantime I got it running!