[CXF-6060] Calling readEntity() on Response created by Response.build() causes NullPointerException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.1
• Fix Version/s: 3.0.3, 3.1
• Component/s: JAX-RS

Environment

Ubuntu 14.04.1 LTS, x86_64.
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)

• Estimated Complexity: Unknown
• Assignee: Sergey Beryozkin
• Reporter: Nikolai Amelichev
• Created: 23/Oct/14 17:36
• Updated: 16/Feb/15 16:09
• Resolved: 28/Oct/14 17:41

Description

This small test:

@Test
public void should_read_entity() {
    final String str = "ouch";

    Response response = Response.status(Response.Status.INTERNAL_SERVER_ERROR)
              .entity(str)
              .build();
    Assert.assertEquals(str, response.readEntity(String.class));
}

unexpectedly throws `NullPointerException` with the following stacktrace:

at org.apache.cxf.jaxrs.provider.ProviderFactory.getInstance(ProviderFactory.java:950)
at org.apache.cxf.jaxrs.impl.ResponseImpl.doReadEntity(ResponseImpl.java:357)
at org.apache.cxf.jaxrs.impl.ResponseImpl.readEntity(ResponseImpl.java:319)
at
org.apache.cxf.jaxrs.impl.ResponseImpl.readEntity(ResponseImpl.java:309)

(because Response created by Response.build() has outMessage == null).

JAX-RS specifies that Response.readEntity() throws only ProcessingException and IllegalStateException. None of them apply: response entity can be converted to String, and response is not closed. So this test should pass (with Response.readEntity() returning "ouch").