Something is not working with the JSON parser

[matentzn]

ROBOT 1.8.4:

robot convert -I http://purl.obolibrary.org/obo/pato.owl -f json -o pato.json

causes:

Exception in thread "main" java.lang.NoSuchMethodError: 'java.util.stream.Collector com.google.common.collect.ImmutableSet.toImmutableSet()'
	at org.geneontology.obographs.owlapi.FromOwl.generateGraph(FromOwl.java:236)
	at org.geneontology.obographs.owlapi.FromOwl.generateGraphDocument(FromOwl.java:63)
	at org.obolibrary.robot.IOHelper.saveOntologyFile(IOHelper.java:1720)
	at org.obolibrary.robot.IOHelper.saveOntology(IOHelper.java:846)
	at org.obolibrary.robot.CommandLineHelper.maybeSaveOutput(CommandLineHelper.java:667)
	at org.obolibrary.robot.ConvertCommand.execute(ConvertCommand.java:141)
	at org.obolibrary.robot.CommandManager.executeCommand(CommandManager.java:244)
	at org.obolibrary.robot.CommandManager.execute(CommandManager.java:188)
	at org.obolibrary.robot.CommandManager.main(CommandManager.java:135)
	at org.obolibrary.robot.CommandLineInterface.main(CommandLineInterface.java:60)

[jamesaoverton]

Nico and I think this is a JAR packaging/shading problem with gson the combination of ROBOT and obographs.

Maybe related to our recent gson bump? #1003

It would be good to have a ROBOT integration test to cover this.

[julesjacobsen]

Since when has this been an issue? obographs-owlapi pulls in guava (the library where Google Immutable Collections lives) as a transitive dependency from obographs-core. Have you added the obographs-core dependency to robot-core/pom.xml too?

[jamesaoverton]

As far as ROBOT is concerned, the problem was introduced in #934. When I build 999ded2, Nico's robot convert example succeeds, and when I build c195f5b it fails with the error above.