我们正在尝试使用 LinkedDataSailGraph 和 Gremlin 来完成一些遍历、推理等时髦的事情。不幸的是，仅仅实例化该类就会导致此错误。有什么想法吗？
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.RunBefores.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.runTests(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
最佳答案
我不知道为什么，但它期望有 JSON-LD 解析器:http://search.maven.org/#artifactdetails%7Ccom.github.jsonld-java%7Cjsonld-java%7C0.2%7Cjar
关于java - LinkedDataSailGraph - 没有可用于 RDF 格式 JSON-LD 的解析器工厂，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17837075/