rdfman created JENA-2019:
----------------------------
Summary: Rule$ParserException in Jena rules when string literal
equals to open parenthesis
Key: JENA-2019
URL: https://issues.apache.org/jira/browse/JENA-2019
Project: Apache Jena
Issue Type: Bug
Components: Jena
Affects Versions: Jena 3.16.0
Environment: _> java -version_
openjdk version "1.8.0_232"
OpenJDK Runtime Environment (build 1.8.0_232-BellSoft-b10)
OpenJDK 64-Bit Server VM (build 25.232-b10, mixed mode)
Windows 8.1
Reporter: rdfman
I have some [Jena
rules|https://jena.apache.org/documentation/inference/#RULEsyntax] and I
{color:#172b4d}need {color}to test a string literal in them:
{code:java}
@prefix my: <http://test/expressions#> .
# Rule including string "("
[(?a my:text "(") -> ] # fails for '(' is single quotes too
{code}
And a call to
{code:java}
List<Rule> rules = Rule.rulesFromURL(my_rules_path)
{code}
throws:
{noformat}
Exception in thread "main"
org.apache.jena.reasoner.rulesys.Rule$ParserException: Expected ')' at end of
clause, found ]
At '[ ( ?a my:text " ( " ) -> ] '
at
org.apache.jena.reasoner.rulesys.Rule$Parser.parseNodeList(Rule.java:987)
at org.apache.jena.reasoner.rulesys.Rule$Parser.parseNode(Rule.java:906)
at
org.apache.jena.reasoner.rulesys.Rule$Parser.parseNodeList(Rule.java:983)
at
org.apache.jena.reasoner.rulesys.Rule$Parser.parseClause(Rule.java:998)
at
org.apache.jena.reasoner.rulesys.Rule$Parser.doParseRule(Rule.java:1057)
at
org.apache.jena.reasoner.rulesys.Rule$Parser.parseRule(Rule.java:1030)
at org.apache.jena.reasoner.rulesys.Rule.parseRules(Rule.java:666)
at org.apache.jena.reasoner.rulesys.Rule.rulesFromURL(Rule.java:515)
at org.apache.jena.reasoner.rulesys.Rule.rulesFromURL(Rule.java:526)
at ru.vstu.Main.runReasoning(Main.java:64){noformat}
This crash happens if the string is exactly equal to *"("* (the use of double
quotes or single quotes does not matter). Escaping also with backslash *"\("*
does not help.
Changing the original string from *"("* to *"()"* , *"(("* , *"-("* or *")"*
eliminates the exception (but this is not what i want).
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