COSNull (pdfbox-1.8.16 API)

java.lang.Object
- org.apache.pdfbox.cos.COSBase
- - org.apache.pdfbox.cos.COSNull

All Implemented Interfaces:

COSObjectable
```
public class COSNull
extends COSBase
```
This class represents a null PDF object.

Version:

$Revision: 1.13 $

Author:

Ben Litchfield

Field Summary

Fields
Modifier and Type Field Description

static COSNull NULL
The one null object in the system.

static byte[] NULL_BYTES
The null token.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`accept(ICOSVisitor visitor)`	visitor pattern double dispatch method.
`void`	`writePDF(java.io.OutputStream output)`	This will output this string as a PDF object.

Methods inherited from class org.apache.pdfbox.cos.COSBase
getCOSObject, getFilterManager, isDirect, isNeedToBeUpdate, setDirect, setNeedToBeUpdate

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

- Field Detail
  - NULL_BYTES
```
public static final byte[] NULL_BYTES
```
    The null token.
  - NULL
```
public static final COSNull NULL
```
    The one null object in the system.
- Method Detail
  - accept
```
public java.lang.Object accept(ICOSVisitor visitor)
                        throws COSVisitorException
```
    visitor pattern double dispatch method.
    
    Specified by:
    
    accept in class COSBase
    
    Parameters:
    
    visitor - The object to notify when visiting this object.
    
    Returns:
    
    any object, depending on the visitor implementation, or null
    
    Throws:
    
    COSVisitorException - If an error occurs while visiting this object.
  - writePDF
```
public void writePDF(java.io.OutputStream output)
              throws java.io.IOException
```
    This will output this string as a PDF object.
    
    Parameters:
    
    output - The stream to write to.
    
    Throws:
    
    java.io.IOException - If there is an error writing to the stream.