[JENA-1863] ARQ formats query with wrong padding when rdf:type is present

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: Jena 3.14.0
• Fix Version/s: Jena 3.15.0
• Component/s: ARQ
• Assignee: Andy Seaborne
• Reporter: David Ruszkai
• Created: 13/Mar/20 15:57
• Updated: 19/May/20 10:26
• Resolved: 10/Apr/20 13:11

Description

Description
Creating a query with any QueryBuilder (SelectBuilder, AskBuilder etc.) when an RDF.type predicate is present will result in a query that contains the character 'a' followed by 19 spaces instead of a single 'a' (shortcut to the RDF.type predicate) or "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>" (the URI of the RDF.type predicate).

Example:

new SelectBuilder().addWhere(createVariable("subject"), org.apache.jena.vocabulary.RDF.type, createVariable("object")).buildString()

OR

new SelectBuilder().addWhere(createVariable("subject"), createURI("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"), createVariable("object")).buildString()

OR

new SelectBuilder().addWhere(createVariable("subject"), "a", createVariable("object")).buildString()

will create the following query

SELECT  *
WHERE
  { ?subject  a                     ?object}

Probably caused by:
https://github.com/apache/jena/commit/6570c25be8c6e958a5647a7d2c1e23466498b332

Summary
The formatting of the query is invalid when the rdf:type predicate is present.

Steps to reproduce
Check the result of

new SelectBuilder().addWhere(createVariable("subject"), "a", createVariable("object")).buildString()

Expected results

SELECT  *
WHERE
  { ?subject  a  ?object}

Actual results

SELECT  *
WHERE
  { ?subject  a                     ?object}

Issue Links

• links to: GitHub Pull Request #723