2.7. コンテンツマーシャリングおよびプロバイダー

@Provider
public class JsonFilterWriteInterceptor implements WriterInterceptor{

	private ObjectFilterModifier modifier = new ObjectFilterModifier();
	@Override
	public void aroundWriteTo(WriterInterceptorContext context)
		throws IOException, WebApplicationException {
	    	//set a threadlocal modifier
            ObjectWriterInjector.set(modifier);
                context.proceed();
	}

}

public class ObjectWriterModifierFilter implements Filter {
	private static ObjectFilterModifier modifier = new ObjectFilterModifier();

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
		FilterChain chain) throws IOException, ServletException {
		    ObjectWriterInjector.set(modifier);
		    chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
	}

}

import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.Provider;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.json.JsonMapper;

@Provider
@Produces(MediaType.APPLICATION_JSON)
public class JacksonDatatypeJacksonProducer implements ContextResolver<ObjectMapper> {

    private final ObjectMapper json;

    public JacksonDatatypeJacksonProducer() throws Exception {
        this.json = JsonMapper.builder()
                .findAndAddModules()
                .build();
    }

    @Override
    public ObjectMapper getContext(Class<?> objectType) {
        return json;
    }
}

@XmlRootElement
public static class Thing {
   private String name;

   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }
}

@Path("/test")
public static class TestService {

   @GET
   @Path("/header")
   @Produces("application/xml")
   @XmlHeader("<?xml-stylesheet type='text/xsl' href='${baseuri}foo.xsl' ?>")
   public Thing get() {
      Thing thing = new Thing();
      thing.setName("bill");
      return thing;
   }
}

@XmlRootElement
public static class Thing {
   private String name;

   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }
}

@Path("/test")
public static class TestService {

   @GET
   @Path("/stylesheet")
   @Produces("application/xml")
   @Stylesheet(type="text/css", href="${basepath}foo.xsl")
   @Junk
   public Thing getStyle() {
      Thing thing = new Thing();
      thing.setName("bill");
      return thing;
   }
}

<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-jackson2-provider</artifactId>
    <version>${version.org.jboss.resteasy}</version>
    <scope>provided</scope>
</dependency>

@XmlRootElement
public static class Thing {
  private String name;

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }
}

@Path("/test")
public static class TestService {
  @GET
  @Path("/thing")
  @Produces("application/json")
  public Thing get() {
    Thing thing = new Thing();
    thing.setName("the thing");
    return thing;
  }
}

@Path("/multipart")
public class MyService {

    @GET
    @Produces("multipart/mixed")
    public MultipartOutput get() {

        MultipartOutput output = new MultipartOutput();
        output.addPart(new Customer("bill"), MediaType.APPLICATION_XML_TYPE);
        output.addPart(new Customer("monica"), MediaType.APPLICATION_XML_TYPE);
        return output;
    }
}

public class CustomerProblemForm {

    @FormParam("customer")
    @PartType("application/xml")
    private Customer customer;

    @FormParam("problem")
    @PartType("text/plain")
    private String problem;

    public Customer getCustomer() { return customer; }
    public void setCustomer(Customer cust) { this.customer = cust; }
    public String getProblem() { return problem; }
    public void setProblem(String problem) { this.problem = problem; }
}

@Path("portal")
public interface CustomerPortal {

    @Path("issues/{id}")
    @Consumes("multipart/form-data")
    @PUT
    public void putProblem(@MultipartForm CustomerProblemForm,
                           @PathParam("id") int id);
}

// Somewhere using it:
{
    CustomerPortal portal = ProxyFactory.create(CustomerPortal.class, "http://example.com");
    CustomerProblemForm form = new CustomerProblemForm();
    form.setCustomer(...);
    form.setProblem(...);

    portal.putProblem(form, 333);
}

@Path("portal")
public class CustomerPortalServer {

    @Path("issues/{id})
    @Consumes("multipart/form-data")
    @PUT
    public void putIssue(@MultipartForm CustomerProblemForm,
                         @PathParam("id") int id) {
       ... write to database...
    }
}

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public static class Xop {

    private Customer bill;
    private Customer monica;

    @XmlMimeType(MediaType.APPLICATION_OCTET_STREAM)
    private byte[] myBinary;

    @XmlMimeType(MediaType.APPLICATION_OCTET_STREAM)
    private DataHandler myDataHandler;

    // methods, other fields ...
}

// our client interface:
@Path("mime")
public static interface MultipartClient {
    @Path("xop")
    @PUT
    @Consumes(MultipartConstants.MULTIPART_RELATED)
    public void putXop(@XopWithMultipartRelated Xop bean);
}

// Somewhere using it:
{
    MultipartClient client = ProxyFactory.create(MultipartClient.class,
        "http://www.example.org");
    Xop xop = new Xop(new Customer("bill"), new Customer("monica"),
        "Hello Xop World!".getBytes("UTF-8"),
        new DataHandler(new ByteArrayDataSource("Hello Xop World!".getBytes("UTF-8"),
        MediaType.APPLICATION_OCTET_STREAM)));
    client.putXop(xop);
}

@Path("/mime")
public class XopService {
    @PUT
    @Path("xop")
    @Consumes(MultipartConstants.MULTIPART_RELATED)
    public void putXopWithMultipartRelated(@XopWithMultipartRelated Xop xop) {
        // do very important things here
    }
}

import org.jboss.resteasy.plugins.providers.multipart.InputPart;

@Provider
@ServerInterceptor
public class ContentTypeSetterPreProcessorInterceptor implements PreProcessInterceptor {

    public ServerResponse preProcess(HttpRequest request, ResourceMethod method)
            throws Failure, WebApplicationException {
        request.setAttribute(InputPart.DEFAULT_CONTENT_TYPE_PROPERTY, "*/*; charset=UTF-8");
        return null;
    }
}

@POST
@Path("query")
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_PLAIN)
public Response setMediaType(MultipartInput input) throws IOException {

    List<InputPart> parts = input.getParts();
    InputPart part = parts.get(0);
    part.setMediaType(MediaType.valueOf("application/foo+xml"));
    String s = part.getBody(String.class, null);
    ...
}

import org.jboss.resteasy.plugins.providers.multipart.InputPart;

@Provider
@ServerInterceptor
public class ContentTypeSetterPreProcessorInterceptor implements PreProcessInterceptor {

    public ServerResponse preProcess(HttpRequest request, ResourceMethod method)
            throws Failure, WebApplicationException {
        request.setAttribute(InputPart.DEFAULT_CHARSET_PROPERTY, "UTF-8");
        return null;
    }
}

<dependency>
  <groupId>org.jboss.resteasy</groupId>
  <artifactId>resteasy-client</artifactId>
  <version>${version.org.jboss.resteasy}</version>
  <scope>provided</scope>
</dependency>
<dependency>
  <groupId>org.jboss.resteasy</groupId>
  <artifactId>resteasy-multipart-provider</artifactId>
  <version>${version.org.jboss.resteasy}</version>
  <scope>provided</scope>
</dependency>

ResteasyClient client = new ResteasyClientBuilder().build();
ResteasyWebTarget target = client.target("http://foo.com/resource");

MultipartFormDataOutput formOutputData = new MultipartFormDataOutput();
formOutputData.addFormData("part1", "this is part 1", MediaType.TEXT_PLAIN);
formOutputData.addFormData("part2", "this is part 2", MediaType.TEXT_PLAIN);

GenericEntity<MultipartFormDataOutput> data = new GenericEntity<MultipartFormDataOutput>(formOutputData) { };

Response response = target.request().put(Entity.entity(data, MediaType.MULTIPART_FORM_DATA_TYPE));

response.close();

@XmlRootElement(namespace = "http://jboss.org/Customer")
@XmlAccessorType(XmlAccessType.FIELD)
public class Customer {
   @XmlElement
   private String name;

   public Customer() {
   }

   public Customer(String name) {
      this.name = name;
   }

   public String getName() {
      return name;
   }
}

@Path("atom")
public static class AtomServer {
   @GET
   @Path("entry")
   @Produces("application/atom+xml")
   public Entry getEntry() {
      Entry entry = new Entry();
      entry.setTitle("Hello World");
      Content content = new Content();
      content.setJAXBObject(new Customer("bill"));
      entry.setContent(content);
      return entry;
   }
}

@Path("atom")
public static class AtomServer {
   @PUT
   @Path("entry")
   @Produces("application/atom+xml")
   public void putCustomer(Entry entry) {
      Content content = entry.getContent();
      Customer cust = content.getJAXBObject(Customer.class);
   }
}