[RESTEASY-1471] (#936)

In ResteasyProviderFactory, user defined context providers should be
registered as "not builtin".

resteasy-jaxrs/src/main/java/org/jboss/resteasy/spi/ResteasyProviderFactory.java

@@ -1334,7 +1334,7 @@ public void registerProvider(Class provider, Integer priorityOverride, boolean i
       {
          try
          {
-            addContextResolver(provider, true);
+            addContextResolver(provider, isBuiltin);
             int priority = getPriority(priorityOverride, contracts, ContextResolver.class, provider);
             newContracts.put(ContextResolver.class, priority);
          }

testsuite/unit-tests/src/test/java/org/jboss/resteasy/test/providers/UserDefinedContextResolverTest.java

@@ -0,0 +1,73 @@
+package org.jboss.resteasy.test.providers;
+
+import java.lang.annotation.Annotation;
+
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.ext.ContextResolver;
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+
+import org.jboss.resteasy.plugins.providers.jaxb.JAXBContextFinder;
+import org.jboss.resteasy.spi.ResteasyProviderFactory;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * @tpSubChapter Providers
+ * @tpChapter Unit tests
+ * @tpTestCaseDetails Regression test for RESTEASY-1471
+ * @tpSince RESTEasy 3.1.0.Final
+ */
+public class UserDefinedContextResolverTest {
+
+   public static class TestException extends RuntimeException {
+      private static final long serialVersionUID = 1L;
+   }
+
+   @Produces({"text/*+xml", "application/*+xml"})
+   @SuppressWarnings("rawtypes")
+   public static class TestContextFinder implements JAXBContextFinder {
+
+      @Override
+      public JAXBContext findCachedContext(Class type, MediaType mediaType, Annotation[] parameterAnnotations) throws JAXBException {
+         return null;
+      }
+      @Override
+      public JAXBContext findCacheContext(MediaType mediaType, Annotation[] paraAnnotations, Class... classes) throws JAXBException {
+         return null;
+      }
+      @Override
+      public JAXBContext findCacheXmlTypeContext(MediaType mediaType, Annotation[] paraAnnotations, Class... classes) throws JAXBException {
+         return null;
+      }
+      @Override
+      public JAXBContext createContext(Annotation[] parameterAnnotations, Class... classes) throws JAXBException {
+         return null;
+      }
+   }
+
+   @Produces({"text/*+xml", "application/*+xml"})
+   public static class TestContextResolver implements ContextResolver<JAXBContextFinder> {
+
+      @Override
+      public JAXBContextFinder getContext(Class<?> type) {
+         return new TestContextFinder();
+      }
+   }
+
+   @Test
+   public void testUserDefinedContextResolver() {
+
+      ResteasyProviderFactory providerFactory = ResteasyProviderFactory.getInstance();
+      ContextResolver<JAXBContextFinder> finder1 = providerFactory.getContextResolver(JAXBContextFinder.class, MediaType.TEXT_XML_TYPE);
+      Assert.assertNotNull(finder1);
+      System.out.println(finder1);
+      providerFactory.register(TestContextResolver.class);
+      ContextResolver<JAXBContextFinder> finder2 = providerFactory.getContextResolver(JAXBContextFinder.class, MediaType.TEXT_XML_TYPE);
+      System.out.println(finder2);
+      JAXBContextFinder finder = finder2.getContext(JAXBContextFinder.class);
+      System.out.println(finder);
+      Assert.assertTrue(finder instanceof TestContextFinder);
+   }
+}