ListEditor question.

[Daniel Mauricio Patino León]

Hello Every one.

I have a problem with ListEditor. The case is this:

I have a main editor for AProxy then AProxy has a list of BProxy 's

so in the main view i have this:

@UiField RespositorioUsuario archivos;

Then i have a sub view with something like this:

public class RespositorioUsuario extends Composite implements IsEditor<ListEditor<ArchivoProxy, RepositoryItem>> , HasRequestContext<List<ArchivoProxy>> {

   // i manage a list of RepositoryItem editors

   private class RepositorioEditorSource extends EditorSource<RepositoryItem> {

        @Override

        public RepositoryItem create(int index) {

         RepositoryItem item = new RepositoryItem();

         container.insert(item, index);

            return item;

        }

        

        @Override

        public void dispose(RepositoryItem subEditor) {

            subEditor.removeFromParent();

        }

        @Override

        public void setIndex(RepositoryItem subEditor, int index) {

         container.insert(subEditor, index);

        }

    }

 

    private ListEditor<ArchivoProxy, RepositoryItem> subeditors = ListEditor.of(new RepositorioEditorSource());

     @Override

public ListEditor<ArchivoProxy, RepositoryItem> asEditor() {

return subeditors;

      }

private AlumnoRequest request;

@Override

public void setRequestContext(RequestContext ctx) {

request = (AlumnoRequest) ctx;

}

}

Then the BProxy editor is RepositoryItem

public class RepositoryItem extends Composite implements Editor<ArchivoProxy> {

  // iam the editor of BProxy

}

So finally i want to add one Item the the list with something like this:

ArchivoProxy a = request.create(ArchivoProxy.class);

subeditors.getList().add(a);

But i cant, and dont know why... i got a NullPointerException.

Caused by: java.lang.NullPointerException: null

    at x.y.z.client.Alumnos.Editor.RespositorioUsuario$1.onChange(RespositorioUsuario.java:160)

    at com.google.gwt.event.dom.client.ChangeEvent.dispatch(ChangeEvent.java:54)

    at com.google.gwt.event.dom.client.ChangeEvent.dispatch(ChangeEvent.java:1)

    at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)

    at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)

    at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)

    at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)

    at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)

    at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)

etc ....

So the getList() is returning nulll

Why?

Any help would be apreciated.

Thank you.

[Daniel Mauricio Patino León]

My bad. 

Of course i need to initialize the ArrayList on the main Proxy when create a new one. So proxy.setArchivos(new ArrayList<ArchivoProxy>());

solved this issue.

Great GWT.

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ISC. Daniel Mauricio Patiño León.

Liondev S.A. de C.V.