java - Jhipster RequestMapping from many Entities at once -

i'm new jhipster , spring, aim make requestmapping obtain data multiple entities json, example did test understand little:

@restcontroller @requestmapping("/keras") public class kerasmodelresource {     private class test {         private final int id;         private final string test;          public test() {             this.id = 1;             this.test = "2";         }          public int getid() { return this.id; }         public string gettest() { return this.test; }     }      private class testobject {         private final int id;         private final string test;         private final test object;          public testobject(int id, string test) {             this.id = id;             this.test = test;             this.object = new test();         }          public int getid() { return this.id; }         public string gettest() { return this.test; }         public test getobject() { return this.object; }     }      private final logger log = loggerfactory.getlogger(accountresource.class);     private final testobject test;      public kerasmodelresource() {         this.test = new testobject(2, "3");     }      /**      *  /authenticate : check if user authenticated, , return login.      *      * @param request http request      * @return login if user authenticated      */     @requestmapping(method=requestmethod.get)     public @responsebody testobject gettest(httpservletrequest request) {         log.debug("rest request test object");         return this.test;     } } 

so when localhost:8080/keras following:

{   "id" : 2,   "test" : "3",   "object" : {     "id" : 1,     "test" : "2"   } } 

however big problem have no idea how data other entities 1 requestmapping

if have doubts concerning whole project or architecture please dont hesitate ask. enjoy day