diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PdfStream.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PdfStream.java | 313 |
1 files changed, 0 insertions, 313 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/PdfStream.java b/src/main/java/com/lowagie/text/pdf/PdfStream.java deleted file mode 100644 index 3d3b9dd..0000000 --- a/src/main/java/com/lowagie/text/pdf/PdfStream.java +++ /dev/null @@ -1,313 +0,0 @@ -/*
- * $Id: PdfStream.java,v 1.57 2005/11/01 12:27:05 psoares33 Exp $
- * $Name: $
- *
- * Copyright 1999, 2000, 2001, 2002 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.ByteArrayOutputStream;
-import java.io.OutputStream;
-import java.io.InputStream;
-import java.io.IOException;
-import java.util.zip.DeflaterOutputStream;
-import java.util.zip.Deflater;
-import com.lowagie.text.Document;
-import com.lowagie.text.DocWriter;
-import com.lowagie.text.ExceptionConverter;
-
-/**
- * <CODE>PdfStream</CODE> is the Pdf stream object.
- * <P>
- * A stream, like a string, is a sequence of characters. However, an application can
- * read a small portion of a stream at a time, while a string must be read in its entirety.
- * For this reason, objects with potentially large amounts of data, such as images and
- * page descriptions, are represented as streams.<BR>
- * A stream consists of a dictionary that describes a sequence of characters, followed by
- * the keyword <B>stream</B>, followed by zero or more lines of characters, followed by
- * the keyword <B>endstream</B>.<BR>
- * All streams must be <CODE>PdfIndirectObject</CODE>s. The stream dictionary must be a direct
- * object. The keyword <B>stream</B> that follows the stream dictionary should be followed by
- * a carriage return and linefeed or just a linefeed.<BR>
- * Remark: In this version only the FLATEDECODE-filter is supported.<BR>
- * This object is described in the 'Portable Document Format Reference Manual version 1.3'
- * section 4.8 (page 41-53).<BR>
- *
- * @see PdfObject
- * @see PdfDictionary
- */
-
-public class PdfStream extends PdfDictionary {
-
- // membervariables
-
-/** is the stream compressed? */
- protected boolean compressed = false;
-
- protected ByteArrayOutputStream streamBytes = null;
- protected InputStream inputStream;
- protected PdfIndirectReference ref;
- protected int inputStreamLength = -1;
- protected PdfWriter writer;
- protected int rawLength;
-
- static final byte STARTSTREAM[] = DocWriter.getISOBytes("stream\n");
- static final byte ENDSTREAM[] = DocWriter.getISOBytes("\nendstream");
- static final int SIZESTREAM = STARTSTREAM.length + ENDSTREAM.length;
-
- // constructors
-
-/**
- * Constructs a <CODE>PdfStream</CODE>-object.
- *
- * @param bytes content of the new <CODE>PdfObject</CODE> as an array of <CODE>byte</CODE>.
- */
-
- public PdfStream(byte[] bytes) {
- super();
- type = STREAM;
- this.bytes = bytes;
- rawLength = bytes.length;
- put(PdfName.LENGTH, new PdfNumber(bytes.length));
- }
-
- /**
- * Creates an efficient stream. No temporary array is ever created. The <CODE>InputStream</CODE>
- * is totally consumed but is not closed. The general usage is:
- * <p>
- * <pre>
- * InputStream in = ...;
- * PdfStream stream = new PdfStream(in, writer);
- * stream.flateCompress();
- * writer.addToBody(stream);
- * stream.writeLength();
- * in.close();
- * </pre>
- * @param inputStream the data to write to this stream
- * @param writer the <CODE>PdfWriter</CODE> for this stream
- */
- public PdfStream(InputStream inputStream, PdfWriter writer) {
- super();
- type = STREAM;
- this.inputStream = inputStream;
- this.writer = writer;
- ref = writer.getPdfIndirectReference();
- put(PdfName.LENGTH, ref);
- }
-
-/**
- * Constructs a <CODE>PdfStream</CODE>-object.
- */
-
- protected PdfStream() {
- super();
- type = STREAM;
- }
-
- /**
- * Writes the stream length to the <CODE>PdfWriter</CODE>.
- * <p>
- * This method must be called and can only be called if the contructor {@link #PdfStream(InputStream,PdfWriter)}
- * is used to create the stream.
- * @throws IOException on error
- * @see #PdfStream(InputStream,PdfWriter)
- */
- public void writeLength() throws IOException {
- if (inputStream == null)
- throw new UnsupportedOperationException("writeLength() can only be called in a contructed PdfStream(InputStream,PdfWriter).");
- if (inputStreamLength == -1)
- throw new IOException("writeLength() can only be called after output of the stream body.");
- writer.addToBody(new PdfNumber(inputStreamLength), ref, false);
- }
-
- /**
- * Gets the raw length of the stream.
- * @return the raw length of the stream
- */
- public int getRawLength() {
- return rawLength;
- }
-
- /**
- * Compresses the stream.
- */
-
- public void flateCompress() {
- if (!Document.compress)
- return;
- // check if the flateCompress-method has already been
- if (compressed) {
- return;
- }
- if (inputStream != null) {
- compressed = true;
- return;
- }
- // check if a filter already exists
- PdfObject filter = get(PdfName.FILTER);
- if (filter != null) {
- if (filter.isName() && ((PdfName) filter).compareTo(PdfName.FLATEDECODE) == 0) {
- return;
- }
- else if (filter.isArray() && ((PdfArray) filter).contains(PdfName.FLATEDECODE)) {
- return;
- }
- else {
- throw new RuntimeException("Stream could not be compressed: filter is not a name or array.");
- }
- }
- try {
- // compress
- ByteArrayOutputStream stream = new ByteArrayOutputStream();
- DeflaterOutputStream zip = new DeflaterOutputStream(stream);
- if (streamBytes != null)
- streamBytes.writeTo(zip);
- else
- zip.write(bytes);
- zip.close();
- // update the object
- streamBytes = stream;
- bytes = null;
- put(PdfName.LENGTH, new PdfNumber(streamBytes.size()));
- if (filter == null) {
- put(PdfName.FILTER, PdfName.FLATEDECODE);
- }
- else {
- PdfArray filters = new PdfArray(filter);
- filters.add(PdfName.FLATEDECODE);
- put(PdfName.FILTER, filters);
- }
- compressed = true;
- }
- catch(IOException ioe) {
- throw new ExceptionConverter(ioe);
- }
- }
-
-// public int getStreamLength(PdfWriter writer) {
-// if (dicBytes == null)
-// toPdf(writer);
-// if (streamBytes != null)
-// return streamBytes.size() + dicBytes.length + SIZESTREAM;
-// else
-// return bytes.length + dicBytes.length + SIZESTREAM;
-// }
-
- protected void superToPdf(PdfWriter writer, OutputStream os) throws IOException {
- super.toPdf(writer, os);
- }
-
- /**
- * @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);
- superToPdf(writer, os);
- os.write(STARTSTREAM);
- PdfEncryption crypto = null;
- if (writer != null)
- crypto = writer.getEncryption();
- if (crypto != null)
- crypto.prepareKey();
- if (inputStream != null) {
- rawLength = 0;
- DeflaterOutputStream def = null;
- OutputStreamCounter osc = new OutputStreamCounter(os);
- OutputStream fout = osc;
- if (crypto != null)
- fout = new PdfEncryptionStream(fout, crypto);
- if (compressed)
- fout = def = new DeflaterOutputStream(fout, new Deflater(Deflater.BEST_COMPRESSION), 0x8000);
-
- byte buf[] = new byte[0x10000];
- while (true) {
- int n = inputStream.read(buf);
- if (n <= 0)
- break;
- fout.write(buf, 0, n);
- rawLength += n;
- }
- if (def != null)
- def.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 = streamBytes.toByteArray();
- crypto.encryptRC4(b);
- }
- else {
- b = new byte[bytes.length];
- crypto.encryptRC4(bytes, b);
- }
- os.write(b);
- }
- }
- os.write(ENDSTREAM);
- }
-
- /**
- * Writes the data content to an <CODE>OutputStream</CODE>.
- * @param os the destination to write to
- * @throws IOException on error
- */
- public void writeContent(OutputStream os) throws IOException {
- if (streamBytes != null)
- streamBytes.writeTo(os);
- else if (bytes != null)
- os.write(bytes);
- }
-}
\ No newline at end of file |