How to convert a Model to a DTO in resource for platformwebservices?

[Former Member]

I'm working with Hybris 6.2, I created a custom extension with web nature to expose custom resources.

In my method, I'm trying to return a List but as far as I know, I have to convert this to a List since those are the POJOs annotated to be sent through Jersey.

My method looks like this:

 @GET
 @Path("/search/{spareparts}")
 public Response getAllSparepartsesByParam(@PathParam("spareparts") final String param)
 {
     Collection<SparepartsModel> sparepartsCollection = super.getResourceValue();

     List<SparepartsModel> filteredCollection = sparepartsCollection.stream()
             .filter(sparepart -> sparepart.getCode().contains(param) || sparepart.getDescription().contains(param))
             .collect(Collectors.toList());
     List<SparepartsDTO> dtos = getObjectGraph().transform(filteredCollection);
     SparepartsesDTO response = new SparepartsesDTO();
     response.setSparepartses(dtos);
     getResponse().entity(filteredCollection);
     return getResponse().build();
 }

I though using the getObjectGraph().transform method I could accomplish this, but when this is executed I get the following error:

 feb 01, 2018 12:03:31 PM com.sun.jersey.spi.container.ContainerResponse mapMappableContainerException
 GRAVE: The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
 de.hybris.platform.webservices.util.objectgraphtransformer.GraphException: Can't create a GraphContext
         at de.hybris.platform.webservices.util.objectgraphtransformer.impl.BidiGraphTransformer.transform(BidiGraphTransformer.java:58)
         at de.hybris.platform.webservices.util.objectgraphtransformer.impl.AbstractGraphTransformer.transform(AbstractGraphTransformer.java:115)
         at de.hybris.platform.yacceleratorcore.resource.SparepartsesResource.getAllSparepartsesByParam(SparepartsesResource.java:125)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
         at java.lang.reflect.Method.invoke(Method.java:498)
         at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
         at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
         at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
         at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
         at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
         at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
         at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
         at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
         at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1480)
         at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1411)
         at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1360)
         at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1350)
         at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
         at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
         at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
         at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:316)
         at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126)
         at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:122)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:157)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:48)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:213)
         at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)
         at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:53)
         at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:91)
         at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
         at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213)
         at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176)
         at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
         at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
         at de.hybris.platform.util.RootRequestFilter.doFilter(RootRequestFilter.java:871)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
         at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
         at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
         at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
         at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
         at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
         at java.lang.Thread.run(Thread.java:748)

How can I convert this into a list of DTOs?

[Former Member]

Let say you added a new Item called NewItem(in your case it's Sparepartses)

Steps: You need to add a bean in customextension-beans.xml for the DTO to be autogenerated

 <bean class="com.custom.dto.MyItemDTO">
     <property name="myAttribute" type="java.lang.String"/>
 </bean>

Create a populator for MyItem which populates MyItemModel to MyItemDTO

  public class MyItemDTOPopulator implements Populator <MyItemModel, MyItemDTO>{
 
 @Override
 public void populate(final MyItemModel source, final MyItemDTO target) {
    ///do your stuff
    target.setMyAttribute(source.getMyAttribute());
  }

}

Inject populator in your facade and use facade in your controller.