COSNull

java.lang.Object

org.apache.pdfbox.cos.COSBase

org.apache.pdfbox.cos.COSNull

All Implemented Interfaces:: COSObjectable

public final class COSNull extends COSBase

This class represents a null PDF object.

Field Summary

Fields

Modifier and Type

Field

Description

static final COSNull

NULL

The one null object in the system.

static final byte[]

NULL_BYTES

The null token.
Constructor Summary

Constructors

Modifier

Constructor

Description

private

COSNull()

Constructor.
Method Summary

Modifier and Type

Method

Description

void

accept(ICOSVisitor visitor)

Visitor pattern double dispatch method.

String

toString()

void

writePDF(OutputStream output)

This will output this string as a PDF object.

Methods inherited from class org.apache.pdfbox.cos.COSBase
getCOSObject, getKey, isDirect, setDirect, setKey

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details
- NULL_BYTES
  
  public static final byte[] NULL_BYTES
  
  The null token.
- NULL
  
  public static final COSNull NULL
  
  The one null object in the system.
Constructor Details
- COSNull
  
  private COSNull()
  
  Constructor.
Method Details
- accept
  
  public void accept(ICOSVisitor visitor) throws IOException
  
  Visitor pattern double dispatch method.
  
  Specified by:
  
  accept in class COSBase
  
  Parameters:
  
  visitor - The object to notify when visiting this object.
  
  Throws:
  
  IOException - If an error occurs while visiting this object.
- writePDF
  
  public void writePDF(OutputStream output) throws IOException
  
  This will output this string as a PDF object.
  
  Parameters:
  
  output - The stream to write to.
  
  Throws:
  
  IOException - If there is an error writing to the stream.
- toString
  
  public String toString()
  
  Overrides:
  
  toString in class Object