Class IndirectObjectFactory

java.lang.Object
org.openpdf.rups.model.IndirectObjectFactory
public class IndirectObjectFactory extends Object
A factory that can produce all the indirect objects in a PDF file.

  • Field Details

    • reader

      protected PdfReader reader
      The reader object.

    • current

      protected int current
      The current xref number.

    • n

      protected int n
      The highest xref number.

    • objects

      protected ArrayList<PdfObject> objects
      A list of all the indirect objects in a PDF file.

    • idxToRef

      protected IntHashtable idxToRef
      Mapping between the index in the objects list and the reference number in the xref table.

    • refToIdx

      protected IntHashtable refToIdx
      Mapping between the reference number in the xref table and the index in the objects list .

  • Constructor Details

    • IndirectObjectFactory

      public IndirectObjectFactory(PdfReader reader)
      Creates a list that will contain all the indirect objects in a PDF document.
      Parameters:
      reader - the reader that will read the PDF document

  • Method Details

    • getCurrent

      public int getCurrent()
      Gets the last object that has been registered. This method only makes sense while loading the factory. with loadNextObject().
      Returns:
      the number of the last object that was stored

    • getXRefMaximum

      public int getXRefMaximum()
      Gets the highest possible object number in the XRef table.
      Returns:
      an object number

    • storeNextObject

      public boolean storeNextObject()
      Stores the next object of the XRef table. As soon as this method returns false, it makes no longer sense calling it as all the objects have been stored.
      Returns:
      false if there are no objects left to check.

    • size

      public int size()
      Gets the total number of indirect objects in the PDF file. This isn't necessarily the same number as returned by getXRefMaximum(). The PDF specification allows gaps between object numbers.
      Returns:
      the total number of indirect objects in the PDF.

    • getIndexByRef

      public int getIndexByRef(int ref)
      Gets the index of an object based on its number in the xref table.
      Parameters:
      ref - a number in the xref table
      Returns:
      the index in the list of indirect objects

    • getRefByIndex

      public int getRefByIndex(int i)
      Gets the reference number in the xref table based on the index in the indirect object list.
      Parameters:
      i - the index of an object in the indirect object list
      Returns:
      the corresponding reference number in the xref table

    • getObjectByIndex

      public PdfObject getObjectByIndex(int i)
      Gets an object based on its index in the indirect object list.
      Parameters:
      i - an index in the indirect object list
      Returns:
      a PDF object

    • getObjectByReference

      public PdfObject getObjectByReference(int ref)
      Gets an object based on its reference number in the xref table.
      Parameters:
      ref - a number in the xref table
      Returns:
      a PDF object

    • loadObjectByReference

      public PdfObject loadObjectByReference(int ref)
      Loads an object based on its reference number in the xref table.
      Parameters:
      ref - a reference number in the xref table.
      Returns:
      a PDF object