Hello Ofer, the CAS cannot be serialized immediately, but there is a helper class which is serializable.
To write: ObjectOutputStream docOS = ... CASCompleteSerializer serializer = Serialization.serializeCASComplete(aJCas.getCasImpl()); docOS.writeObject(serializer); To read: ObjectInputStream is = ... CASCompleteSerializer serializer = (CASCompleteSerializer) is.readObject(); Serialization.deserializeCASComplete(serializer, (CASImpl) aCAS); However, there are newer and more efficient binary formats that you might want to use [1]. If you want to dig into the topic or if you want to use a ready-made pair of readers/writers for the binary formats, you could consider taking a look at the BinaryCasReader/Writer in the DKPro Core [2,3] (non-ASF). Cheers, -- Richard [1] http://uima.apache.org/d/uimaj-2.6.0/tutorials_and_users_guides.html#ugr.tug.type_filtering.compressed_file [2] https://code.google.com/p/dkpro-core-asl/source/browse/de.tudarmstadt.ukp.dkpro.core-asl/trunk/de.tudarmstadt.ukp.dkpro.core.io.bincas-asl/src/main/java/de/tudarmstadt/ukp/dkpro/core/io/bincas/BinaryCasReader.java [3] https://code.google.com/p/dkpro-core-asl/source/browse/de.tudarmstadt.ukp.dkpro.core-asl/trunk/de.tudarmstadt.ukp.dkpro.core.io.bincas-asl/src/main/java/de/tudarmstadt/ukp/dkpro/core/io/bincas/BinaryCasWriter.java On 19.05.2014, at 11:03, Ofer Bronstein <[email protected]> wrote: > Hi Guys, > > I am an Israeli Master's Student, and have been happily working with UIMA > for the past two years. > I hope this is the right place for my question - > > I have a Document object I created, which has a JCas member with > annotations over a document. > I also have a Sentence object, with a member referencing its Sentence > Annotation in the corresponding JCas. Each Document object references all > of its Sentence objects. > I would like to dump each Document object as a file on disk, using the > default Java serialization. Later they would also be deserialized back into > the Java objects. I understand I would need some special treatment for the > JCases and the Sentence Annotations as they are not serializable (now I get > NotSerializableException). Hopefully the treatment could be as minimal as > possible. > > How do you suggest to do this, regarding serialization of JCas and > combining it with Java serialization? > > I am working on Windows, with Java 1.6 and UIMA 2.4.0. I am using the same > type system and the same 3 views for all JCases and annotations. > > Thank you, > Ofer Bronstein
