[Sparql4j-devel] M1 reached?

[Samppa S. <sam...@pr...>]

Hi all,

I just committed SparqlPreparedStatement implementation, it uses lone 
questionmarks as parameter placeholders, e.g.

select * where {?subject rdfs:label ?; rdfs:comment ?comment . filter 
?comment < ? .}

has 2 parameter slots.

It uses quite naive parsing that differs from the spec at least in IRI 
handling, by disallowing IRIs starting with a digit, ? or " to avoid 
mixing operators with IRIs. I don't see this as a grave limitation.

It implements most of the PreparedStatement.set*(int, *) methods. 
Date/time handling is one to beaware of: for simplicity I 
process/normalize all time-related values using UTC-time zone. It would 
probably be better to use the provided Calendar or JVM default to 
process the time zones but this is a bit more complex to implement since 
XSD time (zone) format is not directly supported by the 
SimpleDateformat. Any opinions about this: should setDate/Time/Timestamp 
retain the given or implicit time zone?

What more is needed for M1? System/integration tests? ResultSet handler 
for RDF/XML?

Tests include one system/integration test that uses server URL defined 
in test/conf/connection.properties (note: test/conf needs to be in 
classpath). It just addresses (?s ?p ?o) -query, checks headers and 
scrolls through the  results.

We should discuss about how to actually implement the system/integration 
tests. How to ensure that the server contains some particular data set 
to query over and validate the results?

Br
  Samppa

-- 

Samppa Saarela <samppa.saarela at profium.com> Profium, Lars Sonckin kaari 12, 02600 Espoo, Finland Tel. +358 (0)9 855 98 000 Fax. +358 (0)9 855 98 002 Mob. +358 (0)41 515 1412  Internet: http://www.profium.com