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Atoms
come in two basic types. Data atoms like NumAtoms
and NameAtoms
contain actual data. RefAtoms
contain a reference to an IndirectObject which contains another
Atom.
Quite often you will want to resolve any RefAtoms and just obtain
the Atom within the final IndirectObject - you want the final item
of data rather than a reference to a piece of data.
This function takes an Atom. If it is a RefAtom it finds the Atom
to which it points. It keeps doing this until it finds and returns
the final data Atom in the chain.
This method may return null if null is passed in, if a RefAtom
cannot be resolved or if a circular dependency is detected.
The reason this function is a member of the IndirectObject is because
resolving RefAtoms requires access to the ObjectSoup.
The ObjectSoup is taken from the IndirectObject.
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Syntax