[jira] [Created] (UIMA-5588) uv3: NPE during deserialization under certain circumstances

[Richard Eckart de Castilho (JIRA)]

Richard Eckart de Castilho created UIMA-5588:
------------------------------------------------

             Summary: uv3: NPE during deserialization under certain 
circumstances
                 Key: UIMA-5588
                 URL: https://issues.apache.org/jira/browse/UIMA-5588
             Project: UIMA
          Issue Type: Bug
          Components: Core Java Framework
    Affects Versions: 3.0.0SDK-beta
            Reporter: Richard Eckart de Castilho


When deserializing some binary CAS formats, there is a NPE in certain cases. 
Here is an example that might serve for reproduction:

{noformat}
    @Test
    public void test6LenientPlainUima() throws Exception
    {
        CAS source = JCasFactory.createJCas().getCas();
        CAS target = JCasFactory.createJCas().getCas();

        new DocumentMetaData(source.getJCas(), 0, 0).addToIndexes();

        @SuppressWarnings("resource")
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        CasIOUtils.save(source, bos, COMPRESSED_FILTERED);
        bos.close();
        
        CasIOUtils.load(new ByteArrayInputStream(bos.toByteArray()), target);
    }
{noformat}

Mind this is a minimal code for reproduction. The same happens when 
deserializing within the context of an initialized AnalysisEngine.

The NPE only seems to be thrown when the `DocumentMetaData` is added via JCas:

{noformat}
java.lang.NullPointerException
        at org.apache.uima.cas.impl.CASImpl.getView(CASImpl.java:2224)
        at 
org.apache.uima.cas.impl.BinaryCasSerDes6.deserializeAfterVersion(BinaryCasSerDes6.java:1892)
        at 
org.apache.uima.cas.impl.BinaryCasSerDes.reinit(BinaryCasSerDes.java:595)
        at org.apache.uima.util.CasIOUtils.load(CasIOUtils.java:382)
        at org.apache.uima.util.CasIOUtils.load(CasIOUtils.java:313)
        at org.apache.uima.util.CasIOUtils.load(CasIOUtils.java:237)
        ...
{noformat}

I have set up a similar test using only the plain CAS API which seems to work 
fine:

{noformat}
    @Test
    public void test6LenientPlainUima2() throws Exception
    {
        TypeSystemDescription tsd = new TypeSystemDescription_impl();
        TypeDescription td = tsd.addType("DocumentMetaData", "", 
CAS.TYPE_NAME_DOCUMENT_ANNOTATION);
        td.addFeature("feat", "", CAS.TYPE_NAME_STRING);
        
        CAS source = CasCreationUtils.createCas(tsd, null, null, null);
        CAS target = CasCreationUtils.createCas(tsd, null, null, null);

        AnnotationFS dmd = source
                
.createAnnotation(source.getTypeSystem().getType("DocumentMetaData"), 0, 0);
        source.addFsToIndexes(dmd);
        assertEquals("DocumentMetaData", 
source.getDocumentAnnotation().getType().getName());

        @SuppressWarnings("resource")
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        CasIOUtils.save(source, bos, COMPRESSED_FILTERED);
        bos.close();
        
        CasIOUtils.load(new ByteArrayInputStream(bos.toByteArray()), target);
    }
{noformat}




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