Package com.itextpdf.pdfoptimizer.handlers

Class PdfXObjectDuplicationOptimizer

java.lang.Object

com.itextpdf.pdfoptimizer.AbstractOptimizationHandler

com.itextpdf.pdfoptimizer.handlers.PdfXObjectDuplicationOptimizer

       public class PdfXObjectDuplicationOptimizer extends AbstractOptimizationHandler
      

Looks for equal streams and performs optimization by replacing them with a reference to a single stream.

Constructor Summary

Constructors

Constructor	Description
PdfXObjectDuplicationOptimizer()	Creates an empty xObject duplication optimizer.

Method Summary

Modifier and Type	Method	Description
protected void	optimizePdf(com.itextpdf.kernel.pdf.PdfDocument document, OptimizationSession session)	The method searches for streams in PdfDocument and compares them.

Methods inherited from class java.lang.Object

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

Constructor Details

PdfXObjectDuplicationOptimizer

             public PdfXObjectDuplicationOptimizer()
            

Creates an empty xObject duplication optimizer.

Method Details

optimizePdf

             protected void optimizePdf
             (com.itextpdf.kernel.pdf.PdfDocument document, OptimizationSession session)
            

The method searches for streams in PdfDocument and compares them. If two streams are same (dictionaries and stream bytes) and can be merged into one then optimizer does it and replace all old pdf streams with indirect reference. Duplicated direct objects will be removed. Definitions of indirect objects will be left, however if PdfDocument.isFlushUnusedObjects() returns false then they will be ignored during flushing.

Specified by:

optimizePdf in class AbstractOptimizationHandler

Parameters:

document - is the PDF document to optimize. Invocation of the method can change the state of the object

session - is an auxiliary object used to support share data between stages of optimization process