Binding Driver To A List

[paran...@gmail.com]

Hello all,

first of all I'm sorry if I sound incompetent but the truth is I'm fairly new to GWT. So here's what I want to do: I have a database with different itemtypes (Product, User, Country, etc...).
I want to make a GWT application that edits these item types. For that purpose I have created a dto called EntityDto which contains a list of SectionDto, which in itself contains a list of PropertyDto. So the PropertyDto is a representation of each of the item's properties (Product.code for instance). The PropertyDto has the following signature:

public class PropertyDto implements Serializable {

  private String id;
  private String value;

  /* getters/setters */
....
}

So I have managed to display a form with TextField for the Entity's properties and their values. Now I want to submit the changed values and persist them in the database. As I was reading on the internet this is achieved using a combination of a Driver and Editor. My problem is that I don't have a real POJO to use any of the existing drivers. All I want is to map the field with id code, for instance, to the String in EntityDto.PropertyDto.value (for whichever PropertyDto has the same id).

Is there any solution to this? How would you create a form that is not backed by a bean but instead by a dynamic map or a list for instance?

Thank you for you help.

[Thomas Broyer]

In any case, you'll have to do it manually.

If you need to use the Editor framework, and/or your scenario is complex enough to make it worth it, then you can use a ValueAwareEditor<SectionDto>: in setValue you loop over the PropertyDto-s and push their values to the corresponding text box, and in flush() you do the reverse (from text box to PropertyDto).

[paran...@gmail.com]

Hi Thomas,

yes that sounds like exactly what I need. What I don't really understand is:
------

you loop over the PropertyDto-s and push their values to the corresponding text box

------
how do I gain access to the text-boxes? Do you have any example I can refer to?

Many Thanks

[Thomas Broyer]

On Monday, January 7, 2013 8:39:40 AM UTC+1, paran...@gmail.com wrote:

Hi Thomas,

yes that sounds like exactly what I need. What I don't really understand is:
------
you loop over the PropertyDto-s and push their values to the corresponding text box
------
how do I gain access to the text-boxes?

They're fields in your editor.

 

Do you have any example I can refer to?

Something like:

public class SectionDtoEditor extends Composite implements ValueAwareEditor<SectionDto> {

   private SectionDto value;

   @Editor.Ignore TextBox foo;

   @Editor.Ignore TextBox bar;

   …

   @Override

   public void setValue(SectionDto value) {

      this.value = value;

      foo.setValue(getPropertyDtoValue(value, "foo");

      bar.setValue(getPropertyDtoValue(value, "bar"));

   }

   @Override

   public void flush() {

      setPropertyDtoValue(value, "foo", foo.getValue());

      setPropertyDtoValue(value, "bar", bar.getValue());

   }

   …

}

where getPropertyDtoValue extracts the value from the PropertyDto whose id is the one given as argument, and setPropertyDtoValue does the reverse.

[Petar Tahchiev]

It works great now.

Thanks

2013/1/7 Thomas Broyer <t.br...@gmail.com>:

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Regards, Petar!
Karlovo, Bulgaria.
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