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Posted to dev@marmotta.apache.org by "Sergio Fernández (JIRA)" <ji...@apache.org> on 2013/11/29 11:04:35 UTC

[jira] [Comment Edited] (MARMOTTA-393) ClassCastException when loading Literal thats stored as a URI

    [ https://issues.apache.org/jira/browse/MARMOTTA-393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13835251#comment-13835251 ] 

Sergio Fernández edited comment on MARMOTTA-393 at 11/29/13 10:04 AM:
----------------------------------------------------------------------

Sorry, but I don't understand the pat of "when loading a literal value that already exists as a URI"; could you please clarified what that means?

A sample of the raw RDF causing such problem would also help to write a test.


was (Author: wikier):
Sorry, but I don't understand the pat of "when loading a literal value that already exists as a URI"; could you please clarified what that means?

A sample of the raw RDF causing such problem would also help to right a test.

> ClassCastException when loading Literal thats stored as a URI
> -------------------------------------------------------------
>
>                 Key: MARMOTTA-393
>                 URL: https://issues.apache.org/jira/browse/MARMOTTA-393
>             Project: Marmotta
>          Issue Type: Bug
>          Components: KiWi Triple Store
>    Affects Versions: 3.1-incubating
>            Reporter: Alan
>            Assignee: Sebastian Schaffert
>            Priority: Minor
>
> When loading a literal value that already exists as a URI the KiWiConnection.loadLiteral throws an ClassCastException as the returned node is a URI. 
> {noformat}
> Caused by: java.lang.ClassCastException: org.apache.marmotta.kiwi.model.rdf.KiWiUriResource cannot be cast to org.apache.marmotta.kiwi.model.rdf.KiWiLiteral
> 	at org.apache.marmotta.kiwi.persistence.KiWiConnection.loadLiteral(KiWiConnection.java:627)
> 	at org.apache.marmotta.kiwi.sail.KiWiValueFactory.createLiteral(KiWiValueFactory.java:435)
> 	at org.apache.marmotta.kiwi.sail.KiWiValueFactory.createLiteral(KiWiValueFactory.java:350)
> 	at org.openrdf.rio.helpers.RDFParserHelper.createLiteral(RDFParserHelper.java:250)
> {noformat}
> Perhaps KiWiConnection.loadLiteral(String value, String lang, KiWiUriResource ltype) could validate the type and return null e.g.
> From this:
> {noformat}
> return (KiWiLiteral)constructNodeFromDatabase(result);
> {noformat}
> To this:
> {noformat}
> KiWiNode node = constructNodeFromDatabase(result);
> KiWiNode kiWiNode = constructNodeFromDatabase(result);
> if(kiWiNode.isLiteral()) {
>     return (KiWiLiteral)kiWiNode;
> } else {
>     return null;
> }
> {noformat}



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