[2.0] how to bind a LocalTime in a Form

[Daniel Berndt]

Hello again,

I am trying to create a form wrapping a class which contains a field
with a LocalTime.
Now I can't see how to tell what format the input has to be in order
to be bound to a LocalTime.

if I use "form.fill(new ClassWithLocalTime(LocalTime.now())" the field
will be filled with a string like that: "17:35:11.249"
However, when I submit this form it constantly claims that the
LocalTime field has an "Invalid value"

So is there a way to properly bind the LocalTime field?

Cheers,
Daniel

[Guillaume Bort]

Are you using Java or Scala? Both use different approach. The Java API
use the Spring data binder.

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[Daniel Berndt]

Yes, I am using Java. Is there any nice resource/code sample of how to
apply the DataBinder for a play form? I did not find the spring api
docs too enlightening...

Cheers,
Daniel

[Guillaume Bort]

You can use:

play.data.format.Formatters.register(...) methods to register you own
formatter. You can use both SimpleFormatter (that will use a formatter
for all LocalTime members) or AnnotationFormatter that will also check
an annotation.

[Daniel Berndt]

Excellent! I got it working now.

In case anyone else is interested, here is the code:

Formatters.register(LocalTime.class, new
Formatters.SimpleFormatter<LocalTime>() {

private Pattern timePattern = Pattern.compile("([012]?\\d)[\\s:._-]+
([012345]?\\d)");

@Override
public LocalTime parse(String input, Locale l) throws ParseException
{
Matcher m = timePattern.matcher(input);
if (!m.find()) throw new ParseException("No valid Input",0);
return new LocalTime(Integer.valueOf(m.group(1)),
Integer.valueOf(m.group(2)));
}

@Override
public String print(LocalTime localTime, Locale l) {
return localTime.toString("HH:mm");
}
});


I've put it into the "public void onStart(Application app)" method of
the Global.java

[­Abhishek ­Pande]

How to do this in scala? Do we need to implement any trait?

[­Abhishek ­Pande]

-------------------------

package helpers

import play.api.data.format.Formatter

import play.api.data.format.Formats._

import scala.Some

import play.api.data.FormError

object Formats extends play.data.format.Formats{

  /**

   * Formatter for the `org.joda.time.LocalTime` type.

   *

   * @param pattern a date pattern as specified in `org.joda.time.format.DateTimeFormat`.

   */

  def jodaLocalTimeFormat(pattern: String): Formatter[org.joda.time.LocalTime] = new Formatter[org.joda.time.LocalTime] {

    import org.joda.time.LocalTime

    override val format = Some(("format.date", Seq(pattern)))

    def bind(key: String, data: Map[String, String]) = {

      stringFormat.bind(key, data).right.flatMap { s =>

        scala.util.control.Exception.allCatch[LocalTime]

          .either(LocalTime.parse(s, org.joda.time.format.DateTimeFormat.forPattern(pattern)))

          .left.map(e => Seq(FormError(key, "error.time", Nil)))

      }

    }

    def unbind(key: String, value: LocalTime) = Map(key -> value.toString(pattern))

  }

  /**

   * Default formatter for `org.joda.time.LocalTime` type with pattern `HH:mm:ss`.

   *

   * @param pattern a date pattern as specified in `org.joda.time.format.DateTimeFormat`.

   */

  implicit val jodaLocalTimeFormat: Formatter[org.joda.time.LocalTime] = jodaLocalTimeFormat("HH:mm:ss")

}

------------------------

Test it and let me know if it is working for you.

Regards,

Abhishek

On Friday, April 5, 2013 2:22:12 PM UTC+5:30, ANUBHAV SINGH wrote:

In terms of scala how can i do this ?