com.lowagie.text.pdf.PRStream Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of itext Show documentation
Show all versions of itext Show documentation
This is a build of the last MPL version of iText.
The newest version!
/*
* $Id: PRStream.java 3633 2008-12-23 18:42:06Z xlv $
*
* Copyright 2001, 2002 by Paulo Soares.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.ExceptionConverter;
public class PRStream extends PdfStream {
protected PdfReader reader;
protected int offset;
protected int length;
//added by ujihara for decryption
protected int objNum = 0;
protected int objGen = 0;
public PRStream(PRStream stream, PdfDictionary newDic) {
reader = stream.reader;
offset = stream.offset;
length = stream.length;
compressed = stream.compressed;
compressionLevel = stream.compressionLevel;
streamBytes = stream.streamBytes;
bytes = stream.bytes;
objNum = stream.objNum;
objGen = stream.objGen;
if (newDic != null)
putAll(newDic);
else
hashMap.putAll(stream.hashMap);
}
public PRStream(PRStream stream, PdfDictionary newDic, PdfReader reader) {
this(stream, newDic);
this.reader = reader;
}
public PRStream(PdfReader reader, int offset) {
this.reader = reader;
this.offset = offset;
}
public PRStream(PdfReader reader, byte conts[]) {
this(reader, conts, DEFAULT_COMPRESSION);
}
/**
* Creates a new PDF stream object that will replace a stream
* in a existing PDF file.
* @param reader the reader that holds the existing PDF
* @param conts the new content
* @param compressionLevel the compression level for the content
* @since 2.1.3 (replacing the existing constructor without param compressionLevel)
*/
public PRStream(PdfReader reader, byte[] conts, int compressionLevel) {
this.reader = reader;
this.offset = -1;
if (Document.compress) {
try {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Deflater deflater = new Deflater(compressionLevel);
DeflaterOutputStream zip = new DeflaterOutputStream(stream, deflater);
zip.write(conts);
zip.close();
deflater.end();
bytes = stream.toByteArray();
}
catch (IOException ioe) {
throw new ExceptionConverter(ioe);
}
put(PdfName.FILTER, PdfName.FLATEDECODE);
}
else
bytes = conts;
setLength(bytes.length);
}
/**
* Sets the data associated with the stream, either compressed or
* uncompressed. Note that the data will never be compressed if
* Document.compress is set to false.
*
* @param data raw data, decrypted and uncompressed.
* @param compress true if you want the stream to be compressed.
* @since iText 2.1.1
*/
public void setData(byte[] data, boolean compress) {
setData(data, compress, DEFAULT_COMPRESSION);
}
/**
* Sets the data associated with the stream, either compressed or
* uncompressed. Note that the data will never be compressed if
* Document.compress is set to false.
*
* @param data raw data, decrypted and uncompressed.
* @param compress true if you want the stream to be compressed.
* @param compressionLevel a value between -1 and 9 (ignored if compress == false)
* @since iText 2.1.3
*/
public void setData(byte[] data, boolean compress, int compressionLevel) {
remove(PdfName.FILTER);
this.offset = -1;
if (Document.compress && compress) {
try {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Deflater deflater = new Deflater(compressionLevel);
DeflaterOutputStream zip = new DeflaterOutputStream(stream, deflater);
zip.write(data);
zip.close();
deflater.end();
bytes = stream.toByteArray();
this.compressionLevel = compressionLevel;
}
catch (IOException ioe) {
throw new ExceptionConverter(ioe);
}
put(PdfName.FILTER, PdfName.FLATEDECODE);
}
else
bytes = data;
setLength(bytes.length);
}
/**Sets the data associated with the stream
* @param data raw data, decrypted and uncompressed.
*/
public void setData(byte[] data) {
setData(data, true);
}
public void setLength(int length) {
this.length = length;
put(PdfName.LENGTH, new PdfNumber(length));
}
public int getOffset() {
return offset;
}
public int getLength() {
return length;
}
public PdfReader getReader() {
return reader;
}
public byte[] getBytes() {
return bytes;
}
public void setObjNum(int objNum, int objGen) {
this.objNum = objNum;
this.objGen = objGen;
}
int getObjNum() {
return objNum;
}
int getObjGen() {
return objGen;
}
public void toPdf(PdfWriter writer, OutputStream os) throws IOException {
byte[] b = PdfReader.getStreamBytesRaw(this);
PdfEncryption crypto = null;
if (writer != null)
crypto = writer.getEncryption();
PdfObject objLen = get(PdfName.LENGTH);
int nn = b.length;
if (crypto != null)
nn = crypto.calculateStreamSize(nn);
put(PdfName.LENGTH, new PdfNumber(nn));
superToPdf(writer, os);
put(PdfName.LENGTH, objLen);
os.write(STARTSTREAM);
if (length > 0) {
if (crypto != null && !crypto.isEmbeddedFilesOnly())
b = crypto.encryptByteArray(b);
os.write(b);
}
os.write(ENDSTREAM);
}
}