java - JAXB List as top level XML -

update: tried suggested here , seemed have progress api on engineered intended purpose , ran out of time, switched hard coding "student-list" in string response of /student call more enough proof of concept needed for.

i working on simple rest service uses xml work student records.

when on /student get:

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <students>     <student>         <grade>b</grade>         <name>jane</name>     </student>     ... </students> 

however, output be:

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <student-list>     <student>         <grade>b</grade>         <name>jane</name>     </student>     ... </student-list> 

here student.java snippet:

@xmlrootelement(name = "student") public class student {     private string name;     private string grade;      public student() {     }      public student(string name, string grade) {         super();         this.name = name;         this.grade = grade;     }      // getters/setters ...  } 

i have tried change xmlrootelement "student-list", makes every sub element of list student-list type, , ignores top level element list.

the project uses jax-rs studentsresource class have tried setting xmlrootelement name on resource class, did not affect output.

it seems automatically naming top level list based on studentsresource class, , cannot figure out how override name.

i have been combing documentation on java not strongest language these days having trouble understanding how pieces fit jaxb , jax-rs.

any ideas, or push in right direction ?

edit: added studentsresource.java snippet:

@path("/student") public class studentsresource {     // mapper class     @context     uriinfo uriinfo;     @context     request request;      studentservice studentservice;      public studentsresource() {         studentservice = new studentservice();     }      @get     @produces("text/xml;charset=utf-8")     public list<student> getstudents() {         return studentservice.getstudentaslist();     }     ...         } 

based on mateen momin's feedback, have outputting rest service on /student:

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <studentdao_students>     <student>         <name>jane</name>         <grade>b</grade>     </student>     ... </studentdao_students> 

i have studentdao, gets wrapped studentservice, gets called resource classes make http calls possible. have moved student class studentdao, made me realize studentservice getting marshalled, here updated snippets:

studentdao.java:

public enum studentdao {     instance;     private map<string, student> students = new hashmap<string, student>();      private studentdao() {          //pre-populate testing purposes         student student = new student("john", "a");         students.put("john", student);         student = new student("jane", "b");         students.put("jane", student);         student = new student("testuser", "f");         students.put("testuser", student);     }      public map<string, student> getstudents() {         return students;     }      @xmlrootelement(name="student")     @xmlaccessortype(xmlaccesstype.field)     public static class student {         private string name;         private string grade;          public student() {         }          public student(string name, string grade) {             super();             this.name = name;             this.grade = grade;         }         // getters/setters here...     } } 

studentservice.java:

@xmlrootelement(name = "student-list") @xmlaccessortype(xmlaccesstype.field) public class studentservice {      studentdao studentdao;      public studentservice() {         studentdao = studentdao.instance;     }     // crud methods here call studentdao hashmap } 

studentsresource.java:

@path("/student") public class studentsresource {     @context     uriinfo uriinfo;     @context     request request;      studentservice studentservice;      public studentsresource() {         studentservice = new studentservice();     }      @get     @produces("text/xml;charset=utf-8")     public list<student> getstudents() {         return studentservice.getstudentaslist();     }      // other http calls, post,put,etc. here         } 

i created main function see happens if specify jaxbcontext:

main testing console output:

public class main {     public static void main(string[] args) {         studentservice studentdao = new studentservice();                  studentdao.student stu1 = new studentdao.student();         stu1.setname("marc");         stu1.setgrade("a");         studentdao.student stu2 = new studentdao.student();         stu2.setname("jacob");         stu2.setgrade("b");         studentdao.student stu3 = new studentdao.student();         stu3.setname("anthony");         stu3.setgrade("a");          studentdao.createstudent(stu1);         studentdao.createstudent(stu2);         studentdao.createstudent(stu3);           try {              file file = new file("out.xml");             jaxbcontext jaxbcontext = jaxbcontext.newinstance(studentservice.class);             marshaller jaxbmarshaller = jaxbcontext.createmarshaller();              // output pretty printed             jaxbmarshaller.setproperty(marshaller.jaxb_formatted_output, true);              jaxbmarshaller.marshal(studentdao, file);             jaxbmarshaller.marshal(studentdao, system.out);          } catch (jaxbexception e) {             e.printstacktrace();         }     } } 

when run main function see output this, not match rest output of course:

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <student-list>     <studentdao>instance</studentdao> </student-list> 

which seems promising, cannot seem top level class name overridden in rest calls, need.

any other ideas of i'm doing wrong here ?

students class

import java.util.arraylist;  import javax.xml.bind.annotation.xmlaccesstype; import javax.xml.bind.annotation.xmlaccessortype; import javax.xml.bind.annotation.xmlelement; import javax.xml.bind.annotation.xmlrootelement;   @xmlrootelement(name = "student-list") @xmlaccessortype(xmlaccesstype.field) public class students{ //students     @xmlelement(name = "student")     public arraylist<student> studentslst;      //getters , setters     public arraylist<student> getstudentslst() {         return studentslst;     }      public void setstudentslst(arraylist<student> studentslst) {         this.studentslst = studentslst;     }      @xmlrootelement     @xmlaccessortype(xmlaccesstype.field)     public static class student {         private string name;         private string grade;          public student() {         }          public student(string name, string grade) {             super();             this.name = name;             this.grade = grade;         }          // getters/setters ...         public string getname() {             return name;         }          public void setname(string name) {             this.name = name;         }          public string getgrade() {             return grade;         }          public void setgrade(string grade) {             this.grade = grade;         }      }  } 

main method /marshaller use:

public static void main(string[] args) {         students.student stu1 = new students.student();         stu1.setname("marc");         stu1.setgrade("a");         students.student stu2 = new students.student();         stu2.setname("jacob");         stu2.setgrade("b");         students.student stu3 = new students.student();         stu3.setname("anthony");         stu3.setgrade("a");          arraylist<students.student> studentslst = new arraylist<>();         studentslst.add(stu1);         studentslst.add(stu2);         studentslst.add(stu3);          students students = new students();          students.setstudentslst(studentslst);           try {              file file = new file("c:\\file.xml");             jaxbcontext jaxbcontext = jaxbcontext.newinstance(students.class);             marshaller jaxbmarshaller = jaxbcontext.createmarshaller();              // output pretty printed             jaxbmarshaller.setproperty(marshaller.jaxb_formatted_output, true);              jaxbmarshaller.marshal(students, file);             jaxbmarshaller.marshal(students, system.out);                } catch (jaxbexception e) {             e.printstacktrace();               } } 

output generated:

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <student-list>     <student>         <name>marc</name>         <grade>a</grade>     </student>     <student>         <name>jacob</name>         <grade>b</grade>     </student>     <student>         <name>anthony</name>         <grade>a</grade>     </student> </student-list> 

ps: since using rest, main method given above can used fyi. use main method build studentservice.getstudentaslist() method accordingly. (my assumption shall pretty give same xml.) :)