How does one edit the avatar of a user using java api for jira 5.1.x?

[S]

I want to edit the avatar of a user using a job which can be scheduled everday. The job should be able to read pictures from a repository and upload as avatar pictures

[S · Accepted solution]

One can do it using AvatarService.

avatarService.setCustomUserAvatar(remoteUser, username, avatarId);