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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