[JENA-1030] Rule.toString() prevents roundtripping rules between objects and strings

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Jena 2.11.0
• Fix Version/s: Jena 3.0.1
• Component/s: Reasoners
• Assignee: Dave Reynolds
• Reporter: Martynas Jusevičius
• Created: 18/Sep/15 10:58
• Updated: 12/Dec/15 18:01
• Resolved: 25/Oct/15 11:01

Description

I have a List<Rule> created using Rule.parseRules from a string:

[inheritance: (?template rdf:type <http://graphity.org/gp#Template>),
(?template ?p ?o), (?p rdf:type owl:AnnotationProperty), (?p
rdfs:isDefinedBy <http://graphity.org/gp#>), (?subClass
rdfs:subClassOf ?template), noValue(?subClass ?p) -> (?subClass ?p ?o)
]

When the list is serialized using toString(), I get

[[ inheritance: (?template rdf:type http://graphity.org/gp#Template)
(?template ?p ?o) (?p rdf:type owl:AnnotationProperty) (?p
rdfs:isDefinedBy http://graphity.org/gp#) (?subClass rdfs:subClassOf
?template) noValue(?subClass ?p) -> (?subClass ?p ?o) ]]

Notice the missing < > brackets on URIs. Reparsing the string gives an
exception:

com.hp.hpl.jena.reasoner.rulesys.Rule$ParserException: Malformed rule
At 'http://graphity.org/gp# ) ( ?subClass rdfs:subClassOf ?template )
noValue ( ?subClass ?p ) -> ( ?subClass ?p ?o ) ] ] '