Use version information to test whether class is current
This generic function uses Versioned-class information
to ask whether an instance of a class (e.g., read from disk) has
current version information.
By default, isCurrent has the following behaviors:
isCurrent(Versioned-instance)Returns a vector of logicals, indicating whether each version matches the current version from the class prototype.
isCurrent(ANY)Return NA, indicating that the
version cannot be determined
isCurrent(Versioned-instance, "class")Returns a
logical vector indicating whether version identifiers shared between
Versioned-instance and "class" are current.
Starting with R-2.6 / Bioconductor 2.1 / Biobase 1.15.1,
isCurrent(Versioned-instance, ...) returns an element S4
indicating whether the class has the ‘S4’ bit set; a value of
FALSE indicates that the object needs to be recreated.
isCurrent(object, value)
object |
Object whose version is to be determined, as described above. |
value |
(Optional) character string identifying a class with which to compare versions. |
isCurrent returns a logical vector.
Biocore team
obj <- new("VersionedBiobase")
isCurrent(obj)
isCurrent(1:10) # NA
A <- setClass("A", contains="VersionedBiobase",
prototype=prototype(new("VersionedBiobase", versions=c(A="1.0.0"))))
a <- A()
classVersion(a)
isCurrent(a, "VersionedBiobase") # is the 'VersionedBiobase' portion current?
classVersion(a)["A"] <- "1.0.1"
classVersion(a)
isCurrent(a, "VersionedBiobase")
isCurrent(a) # more recent, so does not match 'current' defined by prototype
removeClass("A")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.