org.apache.pdfbox.cos

Class 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.

Author:

Ben Litchfield

Field Summary

Fields

Modifier and Type	Field and Description
static COSNull	NULL The one null object in the system.
static byte[]	NULL_BYTES The null token.

Method Summary

Modifier and Type	Method and Description
Object	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, isDirect, setDirect

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, 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 Object 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.

Returns:

any object, depending on the visitor implementation, or null

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