[
https://issues.apache.org/jira/browse/MARMOTTA-393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Alan updated MARMOTTA-393:
--------------------------
Description:
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}
was:
When loading a literal value that already exists as a URI the
KiWiConnection.loadLiteral throws an ClassCastException as the return ed 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 loadLiteral 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}
> 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
>
> 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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