Working With Attachments

Represents an attachment and can be used to insert the associated attachment into a document at a specific key.

These objects are returned by calls to fetchAttachment on DittoCollections. They must be kept alive for the fetching of the attachment to proceed and for you to be notified once the status of the fetch request has changed.

Serves as a token for a specific attachment that you can pass to a call to fetchAttachment on a DittoCollection.

A representation of the events that can occur in relation to an attachment fetch.

There are three different attachment fetch events: completed, progress, or deleted.

There will be at most one completed or deleted event per attachment fetch. There can be many progress events delivered for each attachment fetch.

Updates relating to an attachment fetch are delivered by registering a DittoAttachmentFetcher through a call to fetchAttachment on a DittoCollection instance.