/*
* $Id: PdfEFStream.java 3564 2008-07-15 22:26:03Z xlv $
*
* Copyright (c) 2008 by Bruno Lowagie
*
* 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.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
/**
* Extends PdfStream and should be used to create Streams for Embedded Files
* (file attachments).
* @since 2.1.3
*/
public class PdfEFStream extends PdfStream {
/**
* Creates a Stream object using an InputStream and a PdfWriter object
* @param in the InputStream that will be read to get the Stream object
* @param writer the writer to which the stream will be added
*/
public PdfEFStream(InputStream in, PdfWriter writer) {
super(in, writer);
}
/**
* Creates a Stream object using a byte array
* @param fileStore the bytes for the stream
*/
public PdfEFStream(byte[] fileStore) {
super(fileStore);
}
/**
* @see com.lowagie.text.pdf.PdfDictionary#toPdf(com.lowagie.text.pdf.PdfWriter, java.io.OutputStream)
*/
public void toPdf(PdfWriter writer, OutputStream os) throws IOException {
if (inputStream != null && compressed)
put(PdfName.FILTER, PdfName.FLATEDECODE);
PdfEncryption crypto = null;
if (writer != null)
crypto = writer.getEncryption();
if (crypto != null) {
PdfObject filter = get(PdfName.FILTER);
if (filter != null) {
if (PdfName.CRYPT.equals(filter))
crypto = null;
else if (filter.isArray()) {
ArrayList af = ((PdfArray)filter).getArrayList();
if (!af.isEmpty() && PdfName.CRYPT.equals(af.get(0)))
crypto = null;
}
}
}
if (crypto != null && crypto.isEmbeddedFilesOnly()) {
PdfArray filter = new PdfArray();
PdfArray decodeparms = new PdfArray();
PdfDictionary crypt = new PdfDictionary();
crypt.put(PdfName.NAME, PdfName.STDCF);
filter.add(PdfName.CRYPT);
decodeparms.add(crypt);
if (compressed) {
filter.add(PdfName.FLATEDECODE);
decodeparms.add(new PdfNull());
}
put(PdfName.FILTER, filter);
put(PdfName.DECODEPARMS, decodeparms);
}
PdfObject nn = get(PdfName.LENGTH);
if (crypto != null && nn != null && nn.isNumber()) {
int sz = ((PdfNumber)nn).intValue();
put(PdfName.LENGTH, new PdfNumber(crypto.calculateStreamSize(sz)));
superToPdf(writer, os);
put(PdfName.LENGTH, nn);
}
else
superToPdf(writer, os);
os.write(STARTSTREAM);
if (inputStream != null) {
rawLength = 0;
DeflaterOutputStream def = null;
OutputStreamCounter osc = new OutputStreamCounter(os);
OutputStreamEncryption ose = null;
OutputStream fout = osc;
if (crypto != null)
fout = ose = crypto.getEncryptionStream(fout);
if (compressed)
fout = def = new DeflaterOutputStream(fout, new Deflater(compressionLevel), 0x8000);
byte buf[] = new byte[4192];
while (true) {
int n = inputStream.read(buf);
if (n <= 0)
break;
fout.write(buf, 0, n);
rawLength += n;
}
if (def != null)
def.finish();
if (ose != null)
ose.finish();
inputStreamLength = osc.getCounter();
}
else {
if (crypto == null) {
if (streamBytes != null)
streamBytes.writeTo(os);
else
os.write(bytes);
}
else {
byte b[];
if (streamBytes != null) {
b = crypto.encryptByteArray(streamBytes.toByteArray());
}
else {
b = crypto.encryptByteArray(bytes);
}
os.write(b);
}
}
os.write(ENDSTREAM);
}
}