JAX-RS Validator NPEs with wildcard type arguments -------------------------------------------------- Key: JBIDE-19734 URL: https://issues.jboss.org/browse/JBIDE-19734 Project: Tools (JBoss Tools) Issue Type: Bug Components: webservices Environment: Eclipse Mars, JDK 1.7 32-bit Reporter: Kory Markevich Assignee: Xavier Coulon Fix For: 4.3.0.Beta2 JBoss JAX-RS Tools feature version: 1.8.0.Beta1-v20150417-0152-B698 The JAX-RS validator throws an NPE when using generic types with wildcards. Specifically, the call to typeArgumentBinding.getJavaElement() in SourceType.from(VariableDeclaration) can return null, which the SourceType constructor then tries to use, resulting in the following stack trace. Depending on the code, the validator could trigger this exception as frequently as every pause in typing, resulting in a modal error box popping up constantly. The sample code provided only triggers it on save though. java.lang.NullPointerException at org.jboss.tools.ws.jaxrs.core.jdt.SourceType.<init>(SourceType.java:157) at org.jboss.tools.ws.jaxrs.core.jdt.SourceType.from(SourceType.java:49) at org.jboss.tools.ws.jaxrs.core.jdt.JdtUtils.resolveMethodSignature(JdtUtils.java:1109) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.domain.JaxrsResource$Builder.build(JaxrsResource.java:169) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.domain.JaxrsResource.update(JaxrsResource.java:273) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.domain.JaxrsMetamodel.processJavaElement(JaxrsMetamodel.java:647) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.domain.JaxrsMetamodel.processResourceChange(JaxrsMetamodel.java:608) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.domain.JaxrsMetamodel.processAffectedResources(JaxrsMetamodel.java:574) at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.ResourceChangedBuildJob.run(ResourceChangedBuildJob.java:77) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)