playframework - Deserializing from JSON back to joda DateTime in Play 2.0 -

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i can't figure out magic words allow posting json datetime field in app. when queried, datetimes returned microseconds since epoch. when try post in format though ({"started":"1341006642000","task":{"id":1}}), "invalid value: started".

i tried adding @play.data.format.formats.datetime(pattern="yyyy-mm-dd hh:mm:ss") started field , posting {"started":"2012-07-02 09:24:45","task":{"id":1}} had same result.

the controller method is:

@bodyparser.of(play.mvc.bodyparser.json.class) public static result create(long task_id) {     form<run> runform = form(run.class).bindfromrequest();     (string key : runform.data().keyset()) {         system.err.println(key + " => " + runform.apply(key).value() + "\n");     }      if (runform.haserrors())         return badrequest(runform.errorsasjson());      run run = runform.get();     run.task = task.find.byid(task_id);     run.save();      objectnode result = json.newobject();     result.put("id", run.id);      return ok(result); }

i can see output values being received correctly. know how make work?

after reading "register custom databinder" section of handling form submission page along application global settings page , comparing this question came following solution:

i created custom annotation optional format attribute:

package models;  import java.lang.annotation.*;  @target({ elementtype.field }) @retention(retentionpolicy.runtime) @play.data.form.display(name = "format.joda.datetime", attributes = { "format" }) public @interface jodadatetime {     string format() default ""; }

and registered custom formatter onstart:

import java.text.parseexception; import java.util.locale;  import org.joda.time.datetime; import org.joda.time.format.datetimeformat;  import play.*; import play.data.format.formatters;   public class global extends globalsettings {      @override     public void onstart(application app) {         formatters.register(datetime.class, new formatters.annotationformatter<models.jodadatetime,datetime>() {                 @override                 public datetime parse(models.jodadatetime annotation, string input, locale locale) throws parseexception {                     if (input == null || input.trim().isempty())                         return null;                      if (annotation.format().isempty())                         return new datetime(long.parselong(input));                     else                         return datetimeformat.forpattern(annotation.format()).withlocale(locale).parsedatetime(input);                 }                  @override                 public string print(models.jodadatetime annotation, datetime time, locale locale) {                     if (time == null)                         return null;                      if (annotation.format().isempty())                         return time.getmillis() + "";                     else                         return time.tostring(annotation.format(), locale);                 }          });     }  }

you can specify format if want, or use milliseconds since epoch default. hoping there simpler way since joda included play distribution, got things working.

note: you'll need restart play app doesn't seem detect changes global class.


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