Thank you for your response, Matthew.
I confirmed that the calls work right in curl, browser and my jersey client application if I calls readEntity(String.class).
However, when I calls readEntity(GoogleDriveMetadata.class), I get NPE.
--
Noritaka Sekiyama
Twitter: @moomindani
Blog: mooapp
http://moomindani.wordpress.com (
http://moomindani.wordpress.com/)
日付：2013年7月15日月曜日、時刻：0:44、差出人：Matthew Hall：
> Do the calls work right in curl, or a browser REST client testing plugin, or some other place? Do they return what's really expected?
>
> Matthew.
> --
> Sent from my mobile device.
>
> Noritaka Sekiyama <moomindani_at_gmail.com (mailto:moomindani_at_gmail.com)> wrote:
>
> > Hello Jersey Users,
> >
> > I'm trying to implement REST Client for 3 online strage services
> > (Dropbox, GoogleDrive and SkyDrive) with Jersey 2.0.
> > In order to get JSON metadata and convert JSON to DTO by MOXy, I made
> > following code.
> >
> > -----------------------------------------
> > Client client = ClientBuilder.newBuilder()
> > .register(MoxyJsonFeature.class)
> > .register(JsonMoxyConfigurationContextResolver.class)
> > .build();
> > WebTarget target = client.target(targetUrl);
> > Response response =
> > target.request(MediaType.APPLICATION_JSON_TYPE).get();
> > assert response.getStatus() == 200;
> > //System.out.println(response.readEntity(String.class));
> > GoogleDriveMetadata metadata =
> > response.readEntity(GoogleDriveMetadata.class);
> > -----------------------------------------
> >
> > I confirm that this code works fine in Dropbox, but does not work in
> > GoogleDrive and SkyDrive because of NPE.
> > (Stack trace in case of GoogleDrive is shown at the end of this
> > message. )
> >
> > Please tell me how to avoid NPE in the method Response.readEntity().
> >
> > -----------------------------------------
> > java.lang.reflect.InvocationTargetException
> > 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:606)
> > at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:297)
> > at java.lang.Thread.run(Thread.java:724)
> > Caused by: java.lang.NullPointerException
> > at
> > org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:264)
> > at
> > org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:443)
> > at
> > org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:296)
> > at
> > org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:443)
> > at
> > org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:424)
> > at
> > org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:241)
> > at
> > org.eclipse.persistence.internal.oxm.record.json.JSONReader.parseRoot(JSONReader.java:179)
> > at
> > org.eclipse.persistence.internal.oxm.record.json.JSONReader.parse(JSONReader.java:125)
> > at
> > org.eclipse.persistence.internal.oxm.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:972)
> > at
> > org.eclipse.persistence.internal.oxm.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:425)
> > at
> > org.eclipse.persistence.internal.oxm.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:635)
> > at
> > org.eclipse.persistence.internal.oxm.record.SAXUnmarshaller.unmarshal(SAXUnmarshaller.java:703)
> > at
> > org.eclipse.persistence.oxm.XMLUnmarshaller.unmarshal(XMLUnmarshaller.java:655)
> > at
> > org.eclipse.persistence.jaxb.JAXBUnmarshaller.unmarshal(JAXBUnmarshaller.java:301)
> > at
> > org.eclipse.persistence.jaxb.rs.MOXyJsonProvider.readFrom(MOXyJsonProvider.java:580)
> > at
> > org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.aroundReadFrom(ReaderInterceptorExecutor.java:188)
> > at
> > org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:134)
> > at
> > org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:988)
> > at
> > org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:833)
> > at
> > org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:768)
> > at
> > org.glassfish.jersey.client.InboundJaxrsResponse.readEntity(InboundJaxrsResponse.java:96)
> > at
> > org.glassfish.jersey.client.ScopedJaxrsResponse.access$001(ScopedJaxrsResponse.java:56)
> > at
> > org.glassfish.jersey.client.ScopedJaxrsResponse$1.call(ScopedJaxrsResponse.java:77)
> > at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
> > at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
> > at org.glassfish.jersey.internal.Errors.process(Errors.java:228)
> > at
> > org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:396)
> > at
> > org.glassfish.jersey.client.ScopedJaxrsResponse.readEntity(ScopedJaxrsResponse.java:74)
> > at
> > com.clouddrive.google.GoogleDriveController.getFileList(GoogleDriveController.java:113)
> > at
> > com.clouddrive.google.GoogleDriveController.main(GoogleDriveController.java:182)
> > ... 6 more
>