package com.atlassian.plugins.rest.sample.entities;
   
   import com.atlassian.sal.api.ApplicationProperties;
   import com.atlassian.sal.api.net.*;
   
   import javax.servlet.ServletException;
   import javax.servlet.http.HttpServlet;
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
  import javax.ws.rs.core.HttpHeaders;
  import java.io.IOException;
  import java.io.PrintWriter;
  
  public class EntityClientServlet extends HttpServlet {
      private final RequestFactory restRequestFactory;
      private final ApplicationProperties applicationProperties;
  
      public static final String P_ORANGE = "orange";
      public static final String P_CONTENT_TYPE = "contentType";
      public static final String P_ACCEPT = "accept";
  
      public EntityClientServlet(RequestFactory restRequestFactory, ApplicationProperties applicationProperties) {
          this.restRequestFactory = restRequestFactory;
          this.applicationProperties = applicationProperties;
      }
  
      @Override
      protected void doGet(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {
          resp.setContentType("text/plain");
          final PrintWriter out = resp.getWriter();
          try {
  
              String name = req.getParameter(P_ORANGE);
              if (name == null) {
                  out.write("name is a required parameter");
                  return;
              }
  
              Request restRequest = restRequestFactory.createRequest(Request.MethodType.POST, applicationProperties.getBaseUrl() + "/rest/entity/1/fruit");
  
              // leave Content-Type & Accept null if not otherwise specified
              String contentType = req.getParameter(P_CONTENT_TYPE);
              if (contentType != null) {
                  restRequest.setHeader(HttpHeaders.CONTENT_TYPE, contentType);
              }
              String[] accepts = req.getParameterValues(P_ACCEPT);
              if (accepts != null) {
                  for (String accept : accepts) {
                      restRequest.addHeader(HttpHeaders.ACCEPT, accept);
                  }
              }
  
              restRequest.setEntity(new Orange(name));
  
              restRequest.execute(new ResponseHandler<Response>() {
                  public void handle(final Response restResponse) throws ResponseException {
                      Apple apple = restResponse.getEntity(Apple.class);
                      out.write(apple.getName() + "\n");
                      out.write("Content-Type=" + apple.getReqContentType() + "\n");
                      out.write("Accept=" + apple.getReqAccept());
                  }
              });
              return;
          } catch (ResponseException e) {
              out.write(e.toString());
          } catch (RuntimeException e) {
              out.write(e.toString());
              throw e;
          } finally {
              out.close();
          }
      }
  
  }