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Paul Schaub 2019-08-31 16:10:53 +02:00
parent bd9625ea93
commit 25d64a439c
1 changed files with 29 additions and 2 deletions
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31
smack-extensions/src/main/java/org/jivesoftware/smackx/avatar/UserAvatarManager.java
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@ -55,8 +55,35 @@ import org.jivesoftware.smackx.pubsub.PubSubManager;
import org.jxmpp.jid.EntityBareJid;
/**
* User Avatar manager class.
*
* <h1>User Avatar manager class.</h1>
* This manager allows publication of user avatar images via PubSub, as well as publication of
* {@link MetadataExtension MetadataExtensions} containing {@link MetadataInfo} elements for avatars
* available via PubSub, HTTP or external third-party services via {@link MetadataPointer} elements.
* <p>
* The easiest way to publish a PNG avatar (support for PNG files is REQUIRED), is to use
* {@link #publishPNGAvatar(File, int, int)} which will publish the image data to PubSub and inform
* any subscribers via a metadata update.
* <p>
* Publishing avatars via HTTP is not in the scope of this manager (you could use Smacks
* HTTPFileUploadManager from smack-experimental for that), but publishing metadata updates pointing
* to HTTP resources is supported. Use {@link #publishHttpPNGAvatarMetadata(String, URL, long, int, int)} for that.
* <p>
* By calling {@link #enable()}, the {@link UserAvatarManager} will start receiving metadata updates from
* contacts and other entities. If you want to get informed about those updates, you can register listeners
* by calling {@link #addAvatarListener(AvatarListener)}.
* <p>
* If you store avatars locally, it is recommended to also set an {@link AvatarMetadataStore}, which is responsible
* for keeping track of which avatar files are locally available. If you register such a store via
* {@link #setAvatarMetadataStore(AvatarMetadataStore)}, your registered {@link AvatarListener AvatarListeners}
* will only inform you about those avatars that are not yet locally available.
* <p>
* To fetch an avatar from PubSub, use {@link #fetchAvatarFromPubSub(EntityBareJid, MetadataInfo)} which will
* retrieve the avatar data from PubSub and mark the avatar as locally available in the {@link AvatarMetadataStore}
* if one is registered.
* <p>
* Fetching avatars published via HTTP is out of scope of this manager. If you do implement it, remember to mark the
* avatar as locally available in your {@link AvatarMetadataStore} after you retrieved it.
*
* @author Fernando Ramirez
* @author Paul Schaub
* @see <a href="http://xmpp.org/extensions/xep-0084.html">XEP-0084: User