Package com.itextpdf.kernel.utils

Class PdfResourceCounter

java.lang.Object

com.itextpdf.kernel.utils.PdfResourceCounter

       public class PdfResourceCounter extends Object
      

This class can be used to count the number of bytes needed when copying pages from an existing PDF into a newly created PDF.

Constructor Summary

Constructors

Constructor	Description
PdfResourceCounter(PdfObject obj)	Creates a PdfResourceCounter instance to be used to count the resources needed for either a page (in this case pass a page dictionary) or the trailer (root and info dictionary) of a PDF file.

Method Summary

Modifier and Type	Method	Description
long	getLength(Map<Integer,PdfObject> res)	Returns the resources needed for the object that was used to create this PdfResourceCounter.
Map<Integer,PdfObject>	getResources()	Returns a map with the resources.
protected final void	loopOver(PdfObject obj)	In case an object is an array, a dictionary or a stream, we need to loop over the entries and process them one by one.
protected final void	process(PdfObject obj)	Processes an object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PdfResourceCounter

             public PdfResourceCounter
             (PdfObject obj)
            

Creates a PdfResourceCounter instance to be used to count the resources needed for either a page (in this case pass a page dictionary) or the trailer (root and info dictionary) of a PDF file.

Parameters:

obj - the object we want to examine

Method Details

process

             protected final void process
             (PdfObject obj)
            

Processes an object. If the object is indirect, it is added to the list of resources. If not, it is just processed.

Parameters:

obj - the object to process

loopOver

             protected final void loopOver
             (PdfObject obj)
            

In case an object is an array, a dictionary or a stream, we need to loop over the entries and process them one by one.

Parameters:

obj - the object to examine

getResources

             public Map<Integer,PdfObject> getResources()
            

Returns a map with the resources.

Returns:

the resources

getLength

             public long getLength
             (Map<Integer,PdfObject> res)
            

Returns the resources needed for the object that was used to create this PdfResourceCounter. If you pass a Map with resources that were already used by other objects, these objects will not be taken into account.

Parameters:

res - The resources that can be excluded when counting the bytes.

Returns:

The number of bytes needed for an object.