Michael Cochez created JENA-1941:
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Summary: Parsed query cannot get serialized
Key: JENA-1941
URL: https://issues.apache.org/jira/browse/JENA-1941
Project: Apache Jena
Issue Type: Bug
Components: ARQ, Jena
Affects Versions: Jena 3.16.0
Environment: Oracle jdk-14.0.1
Reporter: Michael Cochez
The following query can be parsed, but cannot be serialized back:
{code:java}
import org.apache.jena.query.Query;
import org.apache.jena.query.QueryFactory;
public class MinimalTest {
public static void main(String[] args) {
String queryString = "SELECT ?a WHERE { <%s> <http://ex.com>
<http://ex.com> }";
Query q = QueryFactory.create(queryString);
String serialized = q.serialize();
System.out.println(serialized);
}
}
{code}
{noformat}
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: begin 0,
end 51, length 50
at java.base/java.lang.String.checkBoundsBeginEnd(String.java:3756)
at java.base/java.lang.String.substring(String.java:1902)
at
org.apache.jena.shared.impl.PrefixMappingImpl.qnameFor(PrefixMappingImpl.java:235)
at org.apache.jena.sparql.util.FmtUtils.prefixFor(FmtUtils.java:494)
at org.apache.jena.sparql.util.FmtUtils.stringForURI(FmtUtils.java:448)
at org.apache.jena.sparql.util.FmtUtils.stringForURI(FmtUtils.java:431)
at org.apache.jena.sparql.util.FmtUtils.stringForNode(FmtUtils.java:374)
at org.apache.jena.sparql.util.FmtUtils.stringForNode(FmtUtils.java:348)
at
org.apache.jena.sparql.serializer.FormatterBase.slotToString(FormatterBase.java:57)
at
org.apache.jena.sparql.serializer.FormatterElement.setWidths(FormatterElement.java:615)
at
org.apache.jena.sparql.serializer.FormatterElement.formatTriples(FormatterElement.java:503)
at
org.apache.jena.sparql.serializer.FormatterElement.flush(FormatterElement.java:558)
at
org.apache.jena.sparql.serializer.FormatterElement.visit(FormatterElement.java:165)
at
org.apache.jena.sparql.syntax.ElementPathBlock.visit(ElementPathBlock.java:94)
at
org.apache.jena.sparql.serializer.FormatterElement.visit(FormatterElement.java:321)
at
org.apache.jena.sparql.syntax.ElementGroup.visit(ElementGroup.java:120)
at
org.apache.jena.sparql.serializer.FormatterElement.visitAsGroup(FormatterElement.java:453)
at
org.apache.jena.sparql.serializer.QuerySerializer.visitQueryPattern(QuerySerializer.java:207)
at org.apache.jena.query.Query.visit(Query.java:770)
at org.apache.jena.query.Query.serialize(Query.java:928)
at org.apache.jena.query.Query.serialize(Query.java:905)
at org.apache.jena.query.Query.serialize(Query.java:895)
at org.apache.jena.query.Query.serialize(Query.java:856)
at MinimalTest.main(MinimalTest.java:10)
{noformat}
I am not entirely sure whether it is
# The query which is invalid, in which case there is a bug in the parser
# The serialization which should not fail, in which case the serializer has a
bug.
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