Cyparkler (SPARQL Factory Framework)

Cyparkler 1.0 is a SPARQL and SeRQL software framework which implements a query factory. Sesame 2 onejar.jar required (included in the download). This software is under GNU, you're free to make modifications and build on it.

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Usage:

HTTPRepository repository = new HTTPRepository(url, rid);
  QueryFactory query = new QueryFactory(repository);
  // select a language type
  query.setLanguage(QueryLangauge.SPARQL);

// add a variable to the projection item list
  ProjectionItemFactory subject = query.addVariable("subject"); 
  // ask for all resources with explicit path
  Path p = query.addPath(subject, RDF.TYPE, "type"); 
  //make the path optional
  p.setOptional(true);

// create a condition
  qf.addCondition("subject", ConditionFactory.INEQUALITY_OPERATOR_TYPE, RDF.TYPE);
  ConditionFactory cf = qf.addCondition("type", ConditionFactory.EQUALITY_OPERATOR_TYPE, RDF.SUBCLASSOF);
  // negate the condition
  cf.setNot(true);
  query.setLogicalConnector(SPARQLConstants.AND_LOGICAL_CONNECTOR);

// build the query string, add namespace clause
  query.build(true);
  String str = query.getQueryString();

// execute the query (automatically builds the query string)
  // results[i] = result row, results[i][j] = column (variable)
  Value[][] results = query.execute();

Documentation can be found here. The Cypher forum provides a place to submit questions, contribute to discussion, etc.

Wishlist (June 24, 2007)

Create Jave Bean (POJO) abstraction layer similar to Hibernate
Create SPARQL Endpoint adapter See SPARQLEndpoint Provider
Connect to other triples stores (e.g. Virtuoso) through a JDBC-like connection
reconcile with the Tripresso project

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Get the latest build here »

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Last modified 2008-09-12 18:36

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Cyparkler (SPARQL Factory Framework)

Documentation and Help

Wishlist (June 24, 2007)

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