DownloadIndex (ExoPlayer library)

All Known Subinterfaces:

WritableDownloadIndex

All Known Implementing Classes:

DefaultDownloadIndex
```
@WorkerThread
public interface DownloadIndex
```
An index of Downloads.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Download`	`getDownload(String id)`	Returns the `Download` with the given `id`, or null.
`DownloadCursor`	`getDownloads(int... states)`	Returns a `DownloadCursor` to `Download`s with the given `states`.

- Method Detail
  - getDownload
```
@Nullable
Download getDownload(String id)
              throws IOException
```
    Returns the Download with the given id, or null.
    This method may be slow and shouldn't normally be called on the main thread.
    
    Parameters:
    
    id - ID of a Download.
    
    Returns:
    
    The Download with the given id, or null if a download state with this id doesn't exist.
    
    Throws:
    
    IOException - If an error occurs reading the state.
  - getDownloads
```
DownloadCursor getDownloads(@State
                            int... states)
                     throws IOException
```
    Returns a DownloadCursor to Downloads with the given states.
    This method may be slow and shouldn't normally be called on the main thread.
    
    Parameters:
    
    states - Returns only the Downloads with this states. If empty, returns all.
    
    Returns:
    
    A cursor to Downloads with the given states.
    
    Throws:
    
    IOException - If an error occurs reading the state.