Package com.itextpdf.kernel.di.pagetree

Class DefaultPageTreeListFactory

java.lang.Object

com.itextpdf.kernel.di.pagetree.DefaultPageTreeListFactory

All Implemented Interfaces:

IPageTreeListFactory

       public class DefaultPageTreeListFactory extends Object implements IPageTreeListFactory
      

This class is a default implementation of IPageTreeListFactory that is used as a default.

This class will create an arraylist when in creation mode. In reading and editing mode, it will create a NullUnlimitedList if the count is greater than the maxEntriesBeforeSwitchingToNullUnlimitedList. This is to prevent potential OOM exceptions when loading a document with a large number of pages where only a few pages are needed.

Constructor Summary

Constructors

Constructor	Description
DefaultPageTreeListFactory(int maxEntriesBeforeSwitchingToNullUnlimitedList)	Creates a new instance of DefaultPageTreeListFactory.

Method Summary

Modifier and Type	Method	Description
ISimpleList	createList(PdfDictionary pagesDictionary)	Creates a list based on the count value in the pages dictionary.

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultPageTreeListFactory

             public DefaultPageTreeListFactory
             (int maxEntriesBeforeSwitchingToNullUnlimitedList)
            

Creates a new instance of DefaultPageTreeListFactory.

Parameters:

maxEntriesBeforeSwitchingToNullUnlimitedList - the maximum number of entries before switching to a NullUnlimitedList.

Method Details

createList

             public  ISimpleList createList
             (PdfDictionary pagesDictionary)
            

Creates a list based on the count value in the pages dictionary. If the count value is greater than the maxEntriesBeforeSwitchingToNullUnlimitedList, a NullUnlimitedList is created. This is to optimize memory usage when loading a document with a large number of pages where only a few pages are needed.

Specified by:

createList in interface IPageTreeListFactory

Type Parameters:

T - The type of the list

Parameters:

pagesDictionary - The pages dictionary

Returns:

The list