Class SelfRenderer<T>

java.lang.Object
com.vaadin.flow.data.renderer.Renderer<T>
com.vaadin.flow.data.renderer.LitRenderer<T>
com.vaadin.flow.data.renderer.ComponentRenderer<Component, T>
org.dellroad.stuff.vaadin25.util.SelfRenderer<T>
Type Parameters:
T - the type of the input model object
All Implemented Interfaces:
Serializable
public class SelfRenderer<T> extends ComponentRenderer<Component, T>
A "do nothing" ComponentRenderer used to render values that are already Component's.

This becomes the default renderer() for @GridColumn annotations on methods that return sub-types of Component: 

public class User {

    // Render username normally - no special Renderer is used
    @GridColumn(header = "Username", width = "50px")
    public String getUsername() { ... }

    // Render status with an Image - as if we had said "renderer = SelfRenderer.class"
    @GridColumn(header = "Status", width = "64px")
    public Image statusColumn() { ... }
}

This class includes graceful handling of null values; null values are converted into empty Text components.

See Also:

  • Constructor Details

    • SelfRenderer

      public SelfRenderer(ValueProvider<? super T, ? extends Component> valueProvider)
      Constructor.
      Parameters:
      valueProvider - creates a component from a model instance
      Throws:
      IllegalArgumentException - if valueProvider is null