Reads the value of a file store attribute.
attribute parameter identifies the attribute to be read
and takes the form:
view-name:attribute-namewhere the character
':'stands for itself.
Usage Example: Suppose we want to know if ZFS compression is enabled (assuming the "zfs" view is supported):
boolean compression = (Boolean)fs.getAttribute("zfs:compression");
|the attribute to read|
null may be a valid valid for some
|if the attribute view is not available or it does not support reading the attribute|
|if an I/O error occurs|