org.fourthline.cling.support.lastchange

## Interface LastChangeDelegator

- All Known Implementing Classes:
    AbstractAudioRenderingControl, AbstractAVTransportService, AVTransportService

      public interface LastChangeDelegator

  Any service implementation using the "LastChange" mechanism.

  Required by the `LastChangeAwareServiceManager` to handle state readouts of "LastChange"-using services for initial events GENA subscriptions. If you want a specification compliant AVTransport or RenderingControl UPnP service, your service implementation should implement this interface as well.

  Author:
    Christian Bauer

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `appendCurrentState(LastChange lc, UnsignedIntegerFourBytes instanceId)`
    `UnsignedIntegerFourBytes[]` | `getCurrentInstanceIds()`
    `LastChange` | `getLastChange()`

- - ### Method Detail

    - #### getLastChange

          LastChange getLastChange()

    - #### appendCurrentState

          void appendCurrentState(LastChange lc,
                                  UnsignedIntegerFourBytes instanceId)
                           throws Exception

      Throws:
        `Exception`

    - #### getCurrentInstanceIds

          UnsignedIntegerFourBytes[] getCurrentInstanceIds()

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