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

I implemented SPARQL Java - a kind of DSL for writing SPARQL queries in Java.

It solves the problem with IDE's auto formatting of concatenated SPARQL query strings and things like that.

As for example:

String shortQuery = Q.prefix("books", "http://example.org/books#")
            .select("?book ?authorName", new where() {
                {
                    $("?book books:author ?author");
                    $("?author books:authorName ?authorName");
                }
            }).get();

Answer 2

Jena provides a QueryBuilder in the Extras package.

https://jena.apache.org/documentation/extras/querybuilder/index.html

It does what you want.