LinkedDataSailGraph-没有解析器工厂可用于RDF格式JSON-LD

Question

We're trying to use the LinkedDataSailGraph along with Gremlin to do some funky stuff with traversals, inference. Unfortunately, just instantiating the class causes this error. Any ideas?

new LinkedDataSailGraph(new MemoryStoreSailGraph());

java.lang.RuntimeException: No parser factory available for RDF format JSON-LD (mimeTypes=application/ld+json; ext=jsonld) at com.tinkerpop.blueprints.impls.sail.impls.LinkedDataSailGraph.createSail(LinkedDataSailGraph.java:22) at com.tinkerpop.blueprints.impls.sail.impls.LinkedDataSailGraph.(LinkedDataSailGraph.java:14) at org.isatools.bii.benchmarking.QueryBenchmark.testLoading(QueryBenchmark.java:71) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.RunBef ores.evaluate(RunBefores.java:27) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTest s(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) Caused by: org.openrdf.rio.UnsupportedRDFormatException: No parser factory available for RDF format JSON-LD (mimeTypes=application/ld+json; ext=jsonld) at org.openrdf.rio.Rio.createParser(Rio.java:184) at net.fortytwo.linkeddata.rdfizers.VerbatimRdfizer.(VerbatimRdfizer.java:26) at net.fortytwo.linkeddata.LinkedDataCache.createDefault(LinkedDataCache.java:139) at net.fortytwo.linkeddata.sail.LinkedDataSail.(LinkedDataSail.java:50) at com.tinkerpop.blueprints.impls.sail.impls.LinkedDataSailGraph.createSail(LinkedDataSailGraph.java:20) ... 25 more

Answer 1

我不知道为什么，但是它希望拥有JSON-LD解析器： http : //search.maven.org/#artifactdetails%7Ccom.github.jsonld-java%7Cjsonld-java%7C0.2%7Cjar

Answer 2

Hi hi I had the same problem, I have resolved as suggested by @wikier.

here there are the working dependencies for maven:

<!-- json-ld -->
<dependency>
    <groupId>com.github.jsonld-java</groupId>
    <artifactId>jsonld-java</artifactId>
    <version>0.3</version>
</dependency>
<dependency>
    <groupId>com.github.jsonld-java</groupId>
    <artifactId>jsonld-java-sesame</artifactId>
    <version>0.3</version>
</dependency>

or if you need them for other systems (sbt, etc), you can check them here: http://mvnrepository.com/artifact/com.github.jsonld-java