com.itextpdf.text.pdf.util

Class PdfResourceCounter

java.lang.Object

com.itextpdf.text.pdf.util.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.

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<Integer,PdfObject>	resources A map of the resources that are already taken into account

Constructor Summary

Constructors

Constructor and Description
PdfResourceCounter(PdfObject object) 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 and 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 void	loopOver(PdfObject object) 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 void	process(PdfObject object) Processes an object.

Methods inherited from class java.lang.Object

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

Field Detail

resources

protected Map<Integer,PdfObject> resources

A map of the resources that are already taken into account

Constructor Detail

PdfResourceCounter

public PdfResourceCounter(PdfObject object)

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:

object - the object we want to examine

Method Detail

process

protected final void process(PdfObject object)

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

Parameters:

object - the object to process

loopOver

protected final void loopOver(PdfObject object)

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:

object - 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)
               throws IOException

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

Throws:

IOException