Metadata

Metadata can be updated by the GridFSDAO object.

Update complete Metadata

UpdateMetadata function will replace the whole metadata for one file.

val value = Map("index"->11, "category"->"templates")
ImageFilesDAO.updateMetadata(oid, value)

Update Metadata elements

UpdateMetadataElement/s update some part of the metadata by a given filter.

 val elements =  Map("category"->"logos")
 val filter = Map() // all files
 ImageFilesDAO.updateMetadataElements(filter, elements)