No parser factory available for RDF format JSON

2018-07-02 10:00:50

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

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

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

链接地址: http://www.djcxy.com/p/90366.html

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