| a cross reference representing a line in the PDF cross referencing
table.
There are two forms of the PDFXref, destinguished by absolutely nothing.
The first type of PDFXref is used as indirect references in a PDFObject.
In this type, the id is an index number into the object cross reference
table. The id will range from 0 to the size of the cross reference
table.
The second form is used in the Java representation of the cross reference
table. In this form, the id is the file position of the start of the
object in the PDF file. See the use of both of these in the
PDFFile.dereference() method, which takes a PDFXref of the first form,
and uses (internally) a PDFXref of the second form.
This is an unhappy state of affairs, and should be fixed. Fortunatly,
the two uses have already been factored out as two different methods.
author:
Mike Wessler | 