How to build SPARQL queries in java?

Question

Is there a library, which is able to build SPARQL queries programmatically like the CriteriaBuilder in JPA or to build the queries like with a PreparedStateme

Answer 1

The Eclipse RDF4J framework (the successor of Sesame) offers a Repository API which is somewhat similar to JDBC - it allows you to create a prepared Query object and inject variable bindings before executing it:

String query = "SELECT * WHERE {?X ?P ?Y }";
TupleQuery preparedQuery = conn.prepareQuery(QuerLanguage.SPARQL, query);
preparedQuery.setBinding("X", someValue);
...
TupleQueryResult result = preparedQuery.evaluate();

In addition, RDF4J has a SparqlBuilder (originally known as spanqit) - a Java DSL for SPARQL which allows you to create SPARQL queries in code like this:

query.prefix(foaf).select(name)
    .where(x.has(foaf.iri("name"), name))
    .orderBy(name)
    .limit(5)
    .offset(10);