Fragment with provided data help

Support
1

Hi,

  1. supposing of having a view with multiple instance data container of the same type
<instance id="tipoA_1" property="tipoa1"></instance>
<instance id="tipoA_2" property="tipoa2"></instance>

where tipoa1 and tipoa2 are properties of type TipoA

  1. supposing of creating a fragment for TipoA with provided data
<instance id="tipoA_1"
                  class="TipoA"
                  provided="true">

How can I reuse the fragment for instance tipoA_1 and tipoA_2?

Thanks for helping!

2

Hi @m.russo

Reusable fragments for one type of entity are available for components displaying a list of entities (see docs).

In your case, you need to customize the implementation of the fragment. Perhaps the way described below will be helpful:

  1. Save an instance container for one of the properties as a fragment property:
    Add a fragment property in the view descriptor:

           <fragment id="tipoA1Fragment" class="com.company.sample.view.typoafragment.TypoAFragment">
            <properties>
                <property name="sourceEntityDc" value="tipoA_1" type="CONTAINER_REF"/>
            </properties>
        </fragment>
        <fragment id="tipoA2Fragment" class="com.company.sample.view.typoafragment.TypoAFragment">
            <properties>
                <property name="sourceEntityDc" value="tipoA_2" type="CONTAINER_REF"/>
            </properties>
        </fragment>

    Add a field and setter to your fragment controller class:

      private InstanceContainer<TipoA> sourceEntityDc;
 
  public void setSourceEntityDc(InstanceContainer<TipoA> sourceEntityDc) {
    this.sourceEntityDc = sourceEntityDc;
  }

  2. Add an instance container to your fragment descriptor:

     <data>
     <instance id="entityDc" class="com.company.sample.entity.TipoA"/>
 </data>

  3. Set the item in the container from the previous step using the instance container from the view:

    @Subscribe(target = Target.HOST_CONTROLLER)
public void onHostBeforeShow(final View.BeforeShowEvent event) {
    entityDc.setItem(sourceEntityDc.getItem());
 }

Regards,
Maria.

3

Thanks Maria,

i was able to deal with my problem with a solution very close to your proposal, and i think it would be better

public void setSourceEntityDc(InstanceContainer<TipoA> sourceEntityDc) {
    sourceEntityDc.addItemChangeListener(e -> {
            entityDc.setItem(e.getItem());
        });
  }