Package com.itextpdf.kernel.pdf

Class PdfStream

java.lang.Object

com.itextpdf.kernel.pdf.PdfObject

com.itextpdf.kernel.pdf.PdfDictionary

com.itextpdf.kernel.pdf.PdfStream

Direct Known Subclasses:

PdfObjectStream

public class PdfStream
extends PdfDictionary

Representation of a stream as described in the PDF Specification.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	compressionLevel
private java.io.InputStream	inputStream
private int	length
private long	offset
protected PdfOutputStream	outputStream

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

Modifier	Constructor	Description
	PdfStream()	Creates an empty PdfStream instance.
	PdfStream(byte[] bytes)	Creates a PdfStream instance.
	PdfStream(byte[] bytes, int compressionLevel)	Constructs a PdfStream-object.
	PdfStream(int compressionLevel)	Constructs a PdfStream-object.
(package private)	PdfStream(long offset, PdfDictionary keys)
	PdfStream(PdfDocument doc, java.io.InputStream inputStream)	Creates an efficient stream.
	PdfStream(PdfDocument doc, java.io.InputStream inputStream, int compressionLevel)	Creates an efficient stream.
protected	PdfStream(java.io.OutputStream outputStream)

Method Summary

Modifier and Type	Method	Description
protected void	copyContent(PdfObject from, PdfDocument document)	Copies object content from object 'from'.
protected void	copyContent(PdfObject from, PdfDocument document, ICopyFilter copyFilter)	Copies object content from object 'from'.
byte[]	getBytes()	Gets decoded stream bytes.
byte[]	getBytes(boolean decoded)	Gets stream bytes.
int	getCompressionLevel()	Gets compression level of this PdfStream.
protected java.io.InputStream	getInputStream()
int	getLength()
protected long	getOffset()
PdfOutputStream	getOutputStream()	Gets output stream.
byte	getType()	Gets object type.
protected void	initOutputStream(java.io.OutputStream stream)
protected PdfObject	newInstance()	Creates new instance of object.
protected void	releaseContent()	Release content of PdfStream.
void	setCompressionLevel(int compressionLevel)	Sets compression level of this PdfStream.
void	setData(byte[] bytes)	Sets bytes as stream's content.
void	setData(byte[] bytes, boolean append)	Sets or appends bytes to stream content.
protected void	updateLength(int length)	Update length manually in case its correction.

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

clear, clone, containsKey, containsValue, copyTo, copyTo, entrySet, get, get, getAsArray, getAsBool, getAsBoolean, getAsDictionary, getAsFloat, getAsInt, getAsName, getAsNumber, getAsRectangle, getAsStream, getAsString, isEmpty, keySet, mergeDifferent, put, putAll, remove, size, toString, values, values

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

checkState, clearState, clone, clone, containsIndirectReference, copyTo, copyTo, copyTo, copyTo, equalContent, flush, flush, getIndirectReference, isArray, isBoolean, isDictionary, isFlushed, isIndirect, isIndirectReference, isLiteral, isModified, isName, isNull, isNumber, isReleaseForbidden, isStream, isString, makeIndirect, makeIndirect, processCopying, processCopying, release, setIndirectReference, setModified, setState

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

compressionLevel

protected int compressionLevel

outputStream

protected PdfOutputStream outputStream

inputStream

private java.io.InputStream inputStream

offset

private long offset

length

private int length

Constructor Detail

PdfStream

public PdfStream(byte[] bytes,
                 int compressionLevel)

Constructs a PdfStream-object.

Parameters:

bytes - initial content of PdfOutputStream.

compressionLevel - the compression level (0 = best speed, 9 = best compression, -1 is default)

PdfStream

public PdfStream(byte[] bytes)

Creates a PdfStream instance.

Parameters:

bytes - bytes to write to the PdfStream

PdfStream

public PdfStream(PdfDocument doc,
                 java.io.InputStream inputStream,
                 int compressionLevel)

Creates an efficient stream. No temporary array is ever created. The InputStream is totally consumed but is not closed. The general usage is:

 PdfDocument document = ?;
 InputStream in = ?;
 PdfStream stream = new PdfStream(document, in, PdfOutputStream.DEFAULT_COMPRESSION);
 ?
 stream.flush();
 in.close();
 

Parameters:

doc - the pdf document in which this stream lies

inputStream - the data to write to this stream

compressionLevel - the compression level (0 = best speed, 9 = best compression, -1 is default)

PdfStream

public PdfStream(PdfDocument doc,
                 java.io.InputStream inputStream)

Creates an efficient stream. No temporary array is ever created. The InputStream is totally consumed but is not closed. The general usage is:

 PdfDocument document = ?;
 InputStream in = ?;
 PdfStream stream = new PdfStream(document, in);
 stream.flush();
 in.close();
 

Parameters:

doc - the pdf document in which this stream lies

inputStream - the data to write to this stream

PdfStream

public PdfStream(int compressionLevel)

Constructs a PdfStream-object.

Parameters:

compressionLevel - the compression level (0 = best speed, 9 = best compression, -1 is default)

PdfStream

public PdfStream()

Creates an empty PdfStream instance.

PdfStream

protected PdfStream(java.io.OutputStream outputStream)

PdfStream

PdfStream(long offset,
          PdfDictionary keys)

Method Detail

getOutputStream

public PdfOutputStream getOutputStream()

Gets output stream.

Returns:

output stream

getCompressionLevel

public int getCompressionLevel()

Gets compression level of this PdfStream. For more details @see DeflaterOutputStream.

Returns:

compression level.

setCompressionLevel

public void setCompressionLevel(int compressionLevel)

Sets compression level of this PdfStream. For more details @see DeflaterOutputStream.

Parameters:

compressionLevel - the compression level (0 = best speed, 9 = best compression, -1 is default)

getType

public byte getType()

Description copied from class: PdfObject

Gets object type.

Overrides:

getType in class PdfDictionary

Returns:

object type.

getLength

public int getLength()

getBytes

public byte[] getBytes()

Gets decoded stream bytes. Note, PdfName.DCTDecode and PdfName.JPXDecode filters will be ignored.

Returns:

byte content of the PdfStream. Byte content will be null, if the PdfStream was created by InputStream.

getBytes

public byte[] getBytes(boolean decoded)

Gets stream bytes. Note, PdfName.DCTDecode and PdfName.JPXDecode filters will be ignored.

Parameters:

decoded - true if to get decoded stream bytes, otherwise false.

Returns:

byte content of the PdfStream. Byte content will be null, if the PdfStream was created by InputStream.

setData

public void setData(byte[] bytes)

Sets bytes as stream's content. Could not be used with streams which were created by InputStream.

Parameters:

bytes - new content for stream; if null then stream's content will be discarded

setData

public void setData(byte[] bytes,
                    boolean append)

Sets or appends bytes to stream content. Could not be used with streams which were created by InputStream.

Parameters:

bytes - New content for stream. These bytes are considered to be a raw data (i.e. not encoded/compressed/encrypted) and if it's not true, the corresponding filters shall be set to the PdfStream object manually. Data compression generally should be configured via setCompressionLevel(int) and is handled on stream writing to the output document. If null and append is false then stream's content will be discarded.

append - If set to true then bytes will be appended to the end, rather then replace original content. The original content will be decoded if needed.

newInstance

protected PdfObject newInstance()

Description copied from class: PdfObject

Creates new instance of object.

Overrides:

newInstance in class PdfDictionary

Returns:

new instance of object.

getOffset

protected long getOffset()

updateLength

protected void updateLength(int length)

Update length manually in case its correction.

Parameters:

length - the new length

See Also:

PdfReader.checkPdfStreamLength(PdfStream)

copyContent

protected void copyContent(PdfObject from,
                           PdfDocument document)

Description copied from class: PdfDictionary

Copies object content from object 'from'.

Overrides:

copyContent in class PdfDictionary

Parameters:

from - object to copy content from.

document - document to copy object to.

copyContent

protected void copyContent(PdfObject from,
                           PdfDocument document,
                           ICopyFilter copyFilter)

Description copied from class: PdfDictionary

Copies object content from object 'from'.

Overrides:

copyContent in class PdfDictionary

Parameters:

from - object to copy content from.

document - document to copy object to.

copyFilter - ICopyFilter a filter that will apply on dictionaries and array Use NullCopyFilter for no filtering

initOutputStream

protected void initOutputStream(java.io.OutputStream stream)

releaseContent

protected void releaseContent()

Release content of PdfStream.

Overrides:

releaseContent in class PdfDictionary

getInputStream

protected java.io.InputStream getInputStream()