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/*
* $Id: PdfEFStream.java 3735 2009-02-26 01:44:03Z 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.aowagie.text.pdf;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
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
*/
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(final InputStream in, final PdfWriter writer) {
super(in, writer);
}
/**
* Creates a Stream object using a byte array
* @param fileStore the bytes for the stream
*/
public PdfEFStream(final byte[] fileStore) {
super(fileStore);
}
/**
* @see com.aowagie.text.pdf.PdfDictionary#toPdf(com.aowagie.text.pdf.PdfWriter, java.io.OutputStream)
*/
@Override
public void toPdf(final PdfWriter writer, final OutputStream os) throws IOException {
if (this.inputStream != null && this.compressed) {
put(PdfName.FILTER, PdfName.FLATEDECODE);
}
PdfEncryption crypto = null;
if (writer != null) {
crypto = writer.getEncryption();
}
if (crypto != null) {
final PdfObject filter = get(PdfName.FILTER);
if (filter != null) {
if (PdfName.CRYPT.equals(filter)) {
crypto = null;
} else if (filter.isArray()) {
final PdfArray a = (PdfArray)filter;
if (!a.isEmpty() && PdfName.CRYPT.equals(a.getPdfObject(0))) {
crypto = null;
}
}
}
}
if (crypto != null && crypto.isEmbeddedFilesOnly()) {
final PdfArray filter = new PdfArray();
final PdfArray decodeparms = new PdfArray();
final PdfDictionary crypt = new PdfDictionary();
crypt.put(PdfName.NAME, PdfName.STDCF);
filter.add(PdfName.CRYPT);
decodeparms.add(crypt);
if (this.compressed) {
filter.add(PdfName.FLATEDECODE);
decodeparms.add(new PdfNull());
}
put(PdfName.FILTER, filter);
put(PdfName.DECODEPARMS, decodeparms);
}
final PdfObject nn = get(PdfName.LENGTH);
if (crypto != null && nn != null && nn.isNumber()) {
final 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 (this.inputStream != null) {
this.rawLength = 0;
DeflaterOutputStream def = null;
final OutputStreamCounter osc = new OutputStreamCounter(os);
OutputStreamEncryption ose = null;
OutputStream fout = osc;
if (crypto != null) {
fout = ose = crypto.getEncryptionStream(fout);
}
Deflater deflater = null;
if (this.compressed) {
deflater = new Deflater(this.compressionLevel);
fout = def = new DeflaterOutputStream(fout, deflater, 0x8000);
}
final byte buf[] = new byte[4192];
while (true) {
final int n = this.inputStream.read(buf);
if (n <= 0) {
break;
}
fout.write(buf, 0, n);
this.rawLength += n;
}
if (def != null) {
def.finish();
deflater.end();
}
if (ose != null) {
ose.finish();
}
this.inputStreamLength = osc.getCounter();
}
else {
if (crypto == null) {
if (this.streamBytes != null) {
this.streamBytes.writeTo(os);
} else {
os.write(this.bytes);
}
}
else {
byte b[];
if (this.streamBytes != null) {
b = crypto.encryptByteArray(this.streamBytes.toByteArray());
}
else {
b = crypto.encryptByteArray(this.bytes);
}
os.write(b);
}
}
os.write(ENDSTREAM);
}
}
