javax.faces.component

## Interface UniqueIdVendor

- All Known Implementing Classes:
    HtmlDataTable, HtmlForm, UIData, UIForm, UINamingContainer, UIViewRoot

      public interface UniqueIdVendor

  UniqueIdVendor is an interface implemented by `UIComponents` that also implement `NamingContainer` so that they can provide unique ids based on their own clientId. This will reduce the amount of id generation variance between different renderings of the same view and is helpful for improved state saving.

  Since:
    2.0

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `String` | `createUniqueId(FacesContext context, String seed)` Generate an identifier for a component.

- - ### Method Detail

    - #### createUniqueId

          String createUniqueId(FacesContext context,
                              String seed)

      Generate an identifier for a component. The identifier will be prefixed with UNIQUE_ID_PREFIX, and will be unique within this component-container. Optionally, a unique seed value can be supplied by component creators which should be included in the generated unique id.

      Parameters:
        `context` - FacesContext
        `seed` - an optional seed value - e.g. based on the position of the component in the VDL-template
      Returns:
        a unique-id in this component-container

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