17.7. Maps of JAXB Objects

@XmlRootElement(namespace = "http://foo.com")
public static class Foo
{
   @XmlAttribute
   private String name;

   public Foo()
   {
   }

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

   public String getName()
   {
      return name;
   }
}

@Path("/map")
public static class MyResource
{
   @POST
   @Produces("application/xml")
   @Consumes("application/xml")
   public Map<String, Foo> post(Map<String, Foo> map)
   {
      Assert.assertEquals(2, map.size());
      Assert.assertNotNull(map.get("bill"));
      Assert.assertNotNull(map.get("monica"));
      Assert.assertEquals(map.get("bill").getName(), "bill");
      Assert.assertEquals(map.get("monica").getName(), "monica");
      return map;
   }
 }

 <map>
<entry key="bill" xmlns="http://foo.com">
    <foo name="bill"/>
</entry>
<entry key="monica" xmlns="http://foo.com">
    <foo name="monica"/>
</entry>
 </map>

 @Target({ElementType.PARAMETER, ElementType.METHOD})
 @Retention(RetentionPolicy.RUNTIME)
 public @interface WrappedMap
 {
/**
 * map element name
 */
String map() default "map";

/**
 * entry element name *
 */
String entry() default "entry";

/**
 * entry's key attribute name
 */
String key() default "key";

String namespace() default "";

String prefix() default "";
 }

 <hashmap>
<hashentry hashkey="bill" xmlns:foo="http://foo.com">
    <foo:foo name="bill"/>
</hashentry>
 </map>

@Path("/map")
public static class MyResource
{
   @GET
   @Produces("application/xml")
   @WrappedMap(map="hashmap", entry="hashentry", key="hashkey")
   public Map<String, Foo> get()
   {
      ...
      return map;
   }