[2.0.x - Java] Index Out of Bounds Exception when binding form data

[Anthony Luxton]

Hi, I have spent most of the day debugging an IndexOutOfBoundsException resulting when binding a posted form with a large number of inputs to a Class containing a list. The error occurs when indices larger than the list size are used on add. The default size seems to be 255.

I have resolved the issue using the apache Commons Collections GrowthList which dynamically grows the list:

 

import org.apache.commons.collections.list.GrowthList;
import org.apache.commons.collections.*;
...
  public static Result maxFormPost() { 
    Form<AddForm> filledForm = form(AddForm.class).bindFromRequest();
    return TODO;
  }
  
  public static class AddForm {
    //public List<String> form = GrowthList.decorate( new ArrayList() );
    
  }

 I thought I would post it here as firstly I found no reference to the problem when searching and hope it might be helpful for others troubleshooting and also as I am wondering if this is the correct fix. Or have I missed something obvious?

Thanks

Ant

[juhi jariwala]

Hi, I am facing same problem can you give me more description about this solution.

Thanks

Juhi 

[Mateusz Szczap]

I have seen a similar problem when binding arrays but when I switched an array to a list problem disappeared. I was debugging the code and I would say it wasn't clear to me why play + spring binding cannot handle Arrays of primitives, e.g. strings.

[co...@eyeviewdigital.com]

Hi Anthony,
Here we had the same issue regarding a list and the bind method. The only solution turned out to be using a hashmap instead of a list. For some reason play framework cannot handle indexes greater than 255. Not exactly sure why. Sorry this answer isn't very informative as I'm not exactly sure about the internal reasons.

[Shweta Turakhia]

I have a similar issue and I cannot change the list to map as that is not owned by my team. Was anyone else able to fix this without changing the data structure ? 

[Thiago Lima]

This seems to be the exact same issue as described in http://forum.spring.io/forum/spring-projects/web/119266-setautogrowcollectionlimit-more-than-256-records. The pure Spring solution is described in the link, but I have no idea how to apply it to Play. Btw, I'm facing the same problem, even using Play 2.2.1 (Java).

[Erol Merdanović]

This was already discussed https://github.com/playframework/playframework/issues/3334

As my recommended solution, user request.body and manually parse values.