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Posted to dev@uima.apache.org by "Marshall Schor (JIRA)" <de...@uima.apache.org> on 2019/07/15 18:28:00 UTC
[jira] [Updated] (UIMA-5845) Inconsistent behavior on going beyond
index limits in SelectFS
[ https://issues.apache.org/jira/browse/UIMA-5845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marshall Schor updated UIMA-5845:
---------------------------------
Fix Version/s: 3.0.1SDK
> Inconsistent behavior on going beyond index limits in SelectFS
> --------------------------------------------------------------
>
> Key: UIMA-5845
> URL: https://issues.apache.org/jira/browse/UIMA-5845
> Project: UIMA
> Issue Type: Bug
> Components: Core Java Framework
> Affects Versions: 3.0.0SDK
> Reporter: Richard Eckart de Castilho
> Priority: Major
> Fix For: 3.0.1SDK
>
>
> The behavior of trying to address annotations outside the index appears to be inconsistent.
> For example, the following call returns `null`:
> {code}
> String text = "one two three";
> tokenBuilder.buildTokens(jCas, text);
> List<Token> tokens = new ArrayList<Token>(select(jCas, Token.class));
>
> for (Token token : tokens) {
> new AnalyzedText(jCas, token.getBegin(), token.getEnd()).addToIndexes();
> }
>
> Token firstToken = tokens.get(0);
> AnalyzedText x = jCas.select(AnalyzedText.class).preceding(firstToken, 0).get();
> {code}
> However, this code trying go from the end of the index to before the first item throws a CASRuntime exception:
> {code}
> String text = "Rot wood cheeses dew?";
> tokenBuilder.buildTokens(jCas, text);
> assertThatExceptionOfType(CASRuntimeException.class)
> .isThrownBy(() -> jCas.select(Token.class).backwards().get(4))
> .withMessage("CAS does not contain any '" + Token.class.getName() + "' instances shifted by: 4.");
> {code}
> It would seem reasonably to either always return null or to always thrown an exception. If an exception is thrown, it would seem reasonable to introduce a subtype of the CASRuntimeException, e.g. a CASIndexOutOfBounds exception or something the likes. CASRuntimeException seems very general.
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