DownloadIndex

Kotlin |Java

@WorkerThread
@UnstableApi
public interface DownloadIndex

Known direct subclasses

WritableDownloadIndex

A writable index of Downloads.

Known indirect subclasses

DefaultDownloadIndex

A DownloadIndex that uses SQLite to persist Downloads.

An index of Downloads.

Summary

Public methods
`abstract @Nullable Download`	`getDownload(String id)` Returns the `Download` with the given `id`, or null.
`abstract DownloadCursor`	`getDownloads(@Download.State int[] states)` Returns a `DownloadCursor` to `Download`s with the given `states`.

abstract @Nullable Download getDownload(String id)

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
`String id`	ID of a `Download`.

Returns
`@Nullable Download`	The `Download` with the given `id`, or null if a download state with this id doesn't exist.

Throws
`java.io.IOException`	If an error occurs reading the state.

abstract DownloadCursor getDownloads(@Download.State int[] states)

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
`@Download.State int[] states`	Returns only the `Download`s with this states. If empty, returns all.

Returns
`DownloadCursor`	A cursor to `Download`s with the given `states`.

Throws
`java.io.IOException`	If an error occurs reading the state.