Package com.lowagie.rups.model
Class IndirectObjectFactory
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- com.lowagie.rups.model.IndirectObjectFactory
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public class IndirectObjectFactory extends java.lang.Object
A factory that can produce all the indirect objects in a PDF file.
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Field Summary
Fields Modifier and Type Field Description protected int
current
The current xref number.protected IntHashtable
idxToRef
Mapping between the index in the objects list and the reference number in the xref table.protected int
n
The highest xref number.protected java.util.ArrayList<PdfObject>
objects
A list of all the indirect objects in a PDF file.protected PdfReader
reader
The reader object.protected IntHashtable
refToIdx
Mapping between the reference number in the xref table and the index in the objects list .
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Constructor Summary
Constructors Constructor Description IndirectObjectFactory(PdfReader reader)
Creates a list that will contain all the indirect objects in a PDF document.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
getCurrent()
Gets the last object that has been registered.int
getIndexByRef(int ref)
Gets the index of an object based on its number in the xref table.PdfObject
getObjectByIndex(int i)
Gets an object based on its index in the indirect object list.PdfObject
getObjectByReference(int ref)
Gets an object based on its reference number in the xref table.int
getRefByIndex(int i)
Gets the reference number in the xref table based on the index in the indirect object list.int
getXRefMaximum()
Gets the highest possible object number in the XRef table.PdfObject
loadObjectByReference(int ref)
Loads an object based on its reference number in the xref table.int
size()
Gets the total number of indirect objects in the PDF file.private void
store(PdfObject object)
If we store all the objects, we might run out of memory; that's why we'll only store the objects that are necessary to construct other objects (for instance the page table).boolean
storeNextObject()
Stores the next object of the XRef table.
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Field Detail
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reader
protected PdfReader reader
The reader object.
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current
protected int current
The current xref number.
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n
protected int n
The highest xref number.
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objects
protected java.util.ArrayList<PdfObject> objects
A list of all the indirect objects in a PDF file.
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idxToRef
protected IntHashtable idxToRef
Mapping between the index in the objects list and the reference number in the xref table.
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refToIdx
protected IntHashtable refToIdx
Mapping between the reference number in the xref table and the index in the objects list .
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Constructor Detail
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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
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Method Detail
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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
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getXRefMaximum
public int getXRefMaximum()
Gets the highest possible object number in the XRef table.- Returns:
- an object number
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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.
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store
private void store(PdfObject object)
If we store all the objects, we might run out of memory; that's why we'll only store the objects that are necessary to construct other objects (for instance the page table).- Parameters:
object
- an object we might want to store
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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.
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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
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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
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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
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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
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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
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