[jira] [Created] (UIMA-4487) Position lost on FSIterator copy

[Richard Eckart de Castilho (JIRA)]

Richard Eckart de Castilho created UIMA-4487:
------------------------------------------------

             Summary: Position lost on FSIterator copy
                 Key: UIMA-4487
                 URL: https://issues.apache.org/jira/browse/UIMA-4487
             Project: UIMA
          Issue Type: Bug
          Components: Core Java Framework
            Reporter: Richard Eckart de Castilho
             Fix For: 2.8.0SDK


Apparently, in some cases, a FSIterator becomes invalid/looses its position 
after a copy(). Unfortunately, I haven't been able to quickly create a plain 
UIMA test case (I tried reproducing the effect in GetAllIndexedTest, but 
couldn't.

So the following snipped is works (fails) when pasted into the uimaFIT 
CasUtilTest after upgrading uimaFIT to 2.8.0 RC 1:

{noformat}
  @Test
  public void lala() throws Exception {
    String text = "Rot wood cheeses dew?";
    tokenBuilder.buildTokens(jCas, text);

    CAS cas = jCas.getCas();
    // Option 1: remove the ".copy()"
    FSIterator<FeatureStructure> fses = cas.getIndexRepository()
            .getAllIndexedFS(cas.getTypeSystem().getTopType()).copy();

    // Option 2: explicitly moveToFirst 
    // fses.moveToFirst();
    
    int i = 0;
    while (fses.hasNext()) {
      fses.next();
      i++;
    }
    
    assertEquals(6, i);
  }
{noformat}

Maybe you have some idea or can highlight another UIMA core test case where 
this could be conveniently tried out. (Unfortunately, setting up a test CAS in 
plain UIMA is a bit painful/verbose)



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