PDF::API2::Basic::PDF::Objind - PDF indirect object reference. Also acts as an abstract superclass for all elements in a PDF file. |
PDF::API2::Basic::PDF::Objind - PDF indirect object reference. Also acts as an abstract superclass for all elements in a PDF file.
Instance variables differ from content variables in that they all start with a space.
There are other instance variables which are used by the parent for file control.
Returns a Unique id for this object, creating one if it didn't have one before
Releases ALL of the memory used by this indirect object, and all of its
component/child objects. This method is called automatically by
'PDF::API2::Basic::PDF::File->release
' (so you don't have to call it yourself).
NOTE, that it is important that this method get called at some point prior
to the actual destruction of the object. Internally, PDF files have an
enormous amount of cross-references and this causes circular references within
our own internal data structures. Calling 'release()
' forces these circular
references to be cleaned up and the entire internal data structure purged.
Developer note: As part of the brute-force cleanup done here, this method
will throw a warning message whenever unexpected key values are found within
the PDF::API2::Basic::PDF::Objind
object. This is done to help ensure that unexpected
and unfreed values are brought to your attention, so you can bug us to keep the
module updated properly; otherwise the potential for memory leaks due to
dangling circular references will exist.
Returns the val of this object or reads the object and then returns its value.
Note that all direct subclasses *must* make their own versions of this subroutine otherwise we could be in for a very deep loop!
Makes sure that the object is fully read in, etc.
If you really want to output this object, then you must need to read it first. This also means that all direct subclasses must subclass this method or loop forever!
PDF::API2::Basic::PDF::Objind - PDF indirect object reference. Also acts as an abstract superclass for all elements in a PDF file. |