XML Support - Web Services Quiz - 10 questions

1.

Which low level data types does Jersey support?

StreamSource, SAXSource, DOMSource and Document.

2.

Which XML representations does Jersey support?

- Low level (StreamSource, SAXSource, DOMSource and Document);

- JAXB;

- with using JAXBElement.

3.

Write the jersey client to test this resource:

@Path("exams")
public class ExamService {
    @POST
    @Path("StreamSource")
    public StreamSource getStreamSource(StreamSource streamSource) {
        return streamSource;
    }
}

Client client = Client.create();
WebResource resource = client.resource(".../exams/StreamSource");
String result = resource.type(MediaType.APPLICATION_XML_TYPE).post(String.class, "<exam/>");
System.out.println(result);

4.

Can the resource be accessed by GET .../exam?

@XmlRootElement
public class Exam {
    public int id;
    public String name;
}

@Path("exam")
public class ExamService {
    @GET
    @Produces(MediaType.APPLICATION_XML)
    public Exam getExam() {
        Exam exam = new Exam();
        exam.id = 3;
        exam.name = "OCEJWSD6";
        return exam;
    }
}

Yes.

5.

Write Jersey client to test the resource:

@XmlRootElement
public class Exam {
    public int id;
    public String name;
}

@Path("exam")
public class ExamService {
    @GET
    @Produces(MediaType.APPLICATION_XML)
    public Exam getExam() {
        Exam exam = new Exam();
        exam.id = 3;
        exam.name = "OCEJWSD6";
        return exam;
    }
}

Client client = Client.create();
WebResource resource = client.resource("../exam");
Exam result = resource.accept(MediaType.APPLICATION_XML_TYPE).get(Exam.class);

6.

When it is necessary to use JAXBElement class?

If there isn't possibility to add JAXB annotations to the source.

7.

Is it possible to access the resource by GET .../exam?

public class Exam {
    public int id;
    public String name;
}

@Path("exam")
public class ExamService {
    @GET
    @Produces(MediaType.APPLICATION_XML)
    public JAXBElement<Exam> getExam() {
        Exam exam = new Exam();
        exam.id = 3;
        exam.name = "OCEJWSD6";
        return new JAXBElement<Exam>(new QName("exam"), Exam.class, exam);
    }
}

Yes.

8.

Write Jersey client to test the resource:

public class Exam {
    public int id;
    public String name;
}

@Path("exam")
public class ExamService {
    @GET
    @Produces(MediaType.APPLICATION_XML)
    public JAXBElement<Exam> getExam() {
        Exam exam = new Exam();
        exam.id = 3;
        exam.name = "OCEJWSD6";
        return new JAXBElement<Exam>(new QName("exam"), Exam.class, exam);
    }
}

Client client = Client.create();
WebResource resource = client.resource(".../exam");
// GET
GenericType<JAXBElement<Exam>> examType = new GenericType<JAXBElement<Exam>>() {};
Exam exam1 =  resource.accept(MediaType.APPLICATION_XML_TYPE).get(examType).getValue();
System.out.println(exam1.name);
System.out.println(exam1.id);

9.

Write Jersey client to test the resource:

public class Exam {
    public int id;
    public String name;
}

@Path("exam")
public class ExamService {
    @POST
    @Consumes(MediaType.APPLICATION_XML)
    public void setExam(JAXBElement<Exam> exam) {
        System.out.println("setExam " + exam.getValue().name);
        System.out.println("setExam " + exam.getValue().id);
    }
}

Client client = Client.create();
WebResource resource = client.resource(".../exam");

// POST
Exam exam = new Exam();
exam.id = 1;
exam.name = "OCJP 6";
resource.post(new JAXBElement<Exam>(new QName("exam"), Exam.class, exam));

10.

When it can be necessary to use custom JAXBContext?

To set some specific things, for example different classloader.

XML Support - Quiz