com.itextpdf.kernel.pdf

Class PdfNull

java.lang.Object

com.itextpdf.kernel.pdf.PdfObject

com.itextpdf.kernel.pdf.PdfPrimitiveObject

com.itextpdf.kernel.pdf.PdfNull

All Implemented Interfaces:

Serializable

public class PdfNull
extends PdfPrimitiveObject

Representation of the null object in the PDF specification.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static PdfNull	PDF_NULL

Fields inherited from class com.itextpdf.kernel.pdf.PdfPrimitiveObject

content, directOnly

Fields inherited from class com.itextpdf.kernel.pdf.PdfObject

ARRAY, BOOLEAN, DICTIONARY, FLUSHED, FORBID_RELEASE, FREE, INDIRECT_REFERENCE, indirectReference, LITERAL, MODIFIED, MUST_BE_FLUSHED, MUST_BE_INDIRECT, NAME, NULL, NUMBER, ORIGINAL_OBJECT_STREAM, READ_ONLY, READING, STREAM, STRING, UNENCRYPTED

Constructor Summary

Constructors

Constructor and Description
PdfNull() Creates a PdfNull instance.

Method Summary

Modifier and Type	Method and Description
protected void	copyContent(PdfObject from, PdfDocument document) Copies object content from object 'from'.
PdfNull	copyTo(PdfDocument document) Copies object to a specified document.
PdfNull	copyTo(PdfDocument document, boolean allowDuplicating) Copies object to a specified document.
boolean	equals(Object obj)
protected void	generateContent()
byte	getType() Gets object type.
int	hashCode()
PdfNull	makeIndirect(PdfDocument document) Marks object to be saved as indirect.
PdfNull	makeIndirect(PdfDocument document, PdfIndirectReference reference) Marks object to be saved as indirect.
protected PdfNull	newInstance() Creates new instance of object.
String	toString()

Methods inherited from class com.itextpdf.kernel.pdf.PdfPrimitiveObject

compareContent, getInternalContent, hasContent, setIndirectReference

Methods inherited from class com.itextpdf.kernel.pdf.PdfObject

checkState, clearState, clone, flush, flush, getIndirectReference, isArray, isBoolean, isDictionary, isFlushed, isIndirect, isIndirectReference, isLiteral, isModified, isName, isNull, isNumber, isStream, isString, release, setModified, setState

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

PDF_NULL

public static final PdfNull PDF_NULL

Constructor Detail

PdfNull

public PdfNull()

Creates a PdfNull instance.

Method Detail

getType

public byte getType()

Description copied from class: PdfObject

Gets object type.

Specified by:

getType in class PdfObject

Returns:

object type.

makeIndirect

public PdfNull makeIndirect(PdfDocument document)

Marks object to be saved as indirect.

Overrides:

makeIndirect in class PdfObject

Parameters:

document - a document the indirect reference will belong to.

Returns:

object itself.

makeIndirect

public PdfNull makeIndirect(PdfDocument document,
                            PdfIndirectReference reference)

Marks object to be saved as indirect.

Overrides:

makeIndirect in class PdfPrimitiveObject

Parameters:

document - a document the indirect reference will belong to.

Returns:

object itself.

copyTo

public PdfNull copyTo(PdfDocument document)

Copies object to a specified document. Works only for objects that are read from existing document, otherwise an exception is thrown.

Overrides:

copyTo in class PdfObject

Parameters:

document - document to copy object to.

Returns:

copied object.

copyTo

public PdfNull copyTo(PdfDocument document,
                      boolean allowDuplicating)

Copies object to a specified document. Works only for objects that are read from existing document, otherwise an exception is thrown.

Overrides:

copyTo in class PdfObject

Parameters:

document - document to copy object to.

allowDuplicating - indicates if to allow copy objects which already have been copied. If object is associated with any indirect reference and allowDuplicating is false then already existing reference will be returned instead of copying object. If allowDuplicating is true then object will be copied and new indirect reference will be assigned.

Returns:

copied object.

toString

public String toString()

Overrides:

toString in class Object

generateContent

protected void generateContent()

Specified by:

generateContent in class PdfPrimitiveObject

newInstance

protected PdfNull newInstance()

Description copied from class: PdfObject

Creates new instance of object.

Specified by:

newInstance in class PdfObject

Returns:

new instance of object.

copyContent

protected void copyContent(PdfObject from,
                           PdfDocument document)

Description copied from class: PdfObject

Copies object content from object 'from'.

Overrides:

copyContent in class PdfPrimitiveObject

Parameters:

from - object to copy content from.

document - document to copy object to.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object