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From "Hasan (JIRA)" <j...@apache.org>
Subject [jira] Created: (CLEREZZA-15) Sparql query serialization error
Date Thu, 10 Dec 2009 18:08:18 GMT
Sparql query serialization error
--------------------------------

                 Key: CLEREZZA-15
                 URL: https://issues.apache.org/jira/browse/CLEREZZA-15
             Project: Clerezza
          Issue Type: Bug
            Reporter: Hasan


The following query after being parsed generates an error when serialized

PREFIX owl: <http://www.w3.org/2002/07/owl#> 
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> 
PREFIX skos: <http://www.w3.org/2008/05/skos#> 
CONSTRUCT {?concept a skos:Concept; skos:prefLabel ?prefLabel; rdfs:comment ?comment; owl:sameAs
?sameConcept .} 
WHERE { ?concept skos:inScheme <http://localhost:8080/concept-scheme/default>; skos:prefLabel
?prefLabel . 
OPTIONAL { ?concept skos:altLabel ?altLabel; rdfs:comment ?comment; owl:sameAs ?sameConcept
. } 
FILTER (STR(?prefLabel) = 'Linux' || STR(?altLabel) = 'Linux')}

=> error generated:

java.lang.ClassCastException: org.apache.clerezza.rdf.core.sparql.query.impl.SimpleBasicGraphPattern
cannot be cast to org.apache.clerezza.rdf.core.sparql.query.GroupGraphPattern
	at org.apache.clerezza.rdf.core.sparql.query.impl.SimpleStringQuerySerializer.appendQueryPattern(SimpleStringQuerySerializer.java:127)
	at org.apache.clerezza.rdf.core.sparql.query.impl.SimpleStringQuerySerializer.appendWhere(SimpleStringQuerySerializer.java:112)
	at org.apache.clerezza.rdf.core.sparql.query.impl.SimpleStringQuerySerializer.serialize(SimpleStringQuerySerializer.java:270)

affected bundle: org.apache.clerezza.rdf.core

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