XCASParsingException while trying to deserialize xmi into CAS object

Question

I have made Ruta scripts run from Java and have converted the resulting CAS object into an xmi file as below;

FileOutputStream fileOutputStream = new FileOutputStream(outputXmiFile);
XmiCasSerializer.serialize(cas, fileOutputStream);

When I try to convert it back into a CAS object (on another server), as below;

FileInputStream fileInputStream = new FileInputStream(xmiFile);
XmlCasDeserializer.deserialize(fileInputStream, cas);

I get the below exception ;

XCASParsingException: Error parsing XCAS or XMI-CAS from source <unknown> at line <unknown>, column <unknown>: unknown type: NULL.

A snapshot of the exception.

Answer 1

Ya Thanks ! It worked !

import org.apache.uima.util.CasIOUtils;

CAS to XMI

CasIOUtils.save(cas, fileOutputStream, SerialFormat.XMI);

XMI to CAS

CasIOUtils.load(fileInputStream, cas);

Answer 2

This issue occurs when there's really something wrong with your XMI file.

Tip: Another way of opening XMI files might be by using XmiReader .

File xmlFile = new File("/path/to/file.xmi");
CollectionReaderDescription description = createReaderDescription(
   XmiReader.class,
   XmiReader.PARAM_SOURCE_LOCATION, xmlFile
);