com.lowagie.text.xml.xmp.XmpWriter Maven / Gradle / Ivy
/*
* $Id: XmpWriter.java 3949 2009-06-03 15:19:04Z blowagie $
*
* Copyright 2005 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) 1999-2005 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2005 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:
* https://github.com/LibrePDF/OpenPDF
*/
package com.lowagie.text.xml.xmp;
import com.lowagie.text.pdf.PdfDate;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfObject;
import com.lowagie.text.pdf.PdfString;
import com.lowagie.text.pdf.PdfWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.Map;
/**
* With this class you can create an Xmp Stream that can be used for adding
* Metadata to a PDF Dictionary. Remark that this class doesn't cover the
* complete XMP specification.
*/
public class XmpWriter implements AutoCloseable {
/** A possible charset for the XMP. */
public static final String UTF8 = "UTF-8";
/** A possible charset for the XMP. */
public static final String UTF16 = "UTF-16";
/** A possible charset for the XMP. */
public static final String UTF16BE = "UTF-16BE";
/** A possible charset for the XMP. */
public static final String UTF16LE = "UTF-16LE";
/** String used to fill the extra space. */
public static final String EXTRASPACE = " \n";
/** You can add some extra space in the XMP packet; 1 unit in this variable represents 100 spaces and a newline. */
protected int extraSpace;
/** The writer to which you can write bytes for the XMP stream. */
protected OutputStreamWriter writer;
/** The about string that goes into the rdf:Description tags. */
protected String about;
/**
* Processing Instruction required at the start of an XMP stream
* @since iText 2.1.6
*/
public static final String XPACKET_PI_BEGIN = "\n";
/**
* Processing Instruction required at the end of an XMP stream for XMP streams that can be updated
* @since iText 2.1.6
*/
public static final String XPACKET_PI_END_W = "";
/**
* Processing Instruction required at the end of an XMP stream for XMP streams that are read only
* @since iText 2.1.6
*/
public static final String XPACKET_PI_END_R = "";
/** The end attribute. */
protected char end = 'w';
/**
* Creates an XmpWriter.
* @param os output stream
* @param utfEncoding utf encoding to be used
* @param extraSpace extra space
* @throws IOException on error
*/
public XmpWriter(OutputStream os, String utfEncoding, int extraSpace) throws IOException {
this.extraSpace = extraSpace;
writer = new OutputStreamWriter(os, utfEncoding);
writer.write(XPACKET_PI_BEGIN);
writer.write("\n");
writer.write("\n");
about = "";
}
/**
* Creates an XmpWriter.
* @param os output stream
* @throws IOException on error
*/
public XmpWriter(OutputStream os) throws IOException {
this(os, UTF8, 20);
}
/**
* @param os output stream
* @param info {@link PdfDictionary}
* @param PdfXConformance pdf conformance
* eg. values {@link PdfWriter#PDFA1A}, {@link PdfWriter#PDFA1B}
* @throws IOException on error
*/
public XmpWriter(OutputStream os, PdfDictionary info, int PdfXConformance) throws IOException {
this(os);
if (info != null) {
DublinCoreSchema dc = new DublinCoreSchema();
PdfSchema p = new PdfSchema();
XmpBasicSchema basic = new XmpBasicSchema();
PdfName key;
PdfObject obj;
for (PdfName pdfName : info.getKeys()) {
key = pdfName;
obj = info.get(key);
if (obj == null)
continue;
if (PdfName.TITLE.equals(key)) {
dc.addTitle(((PdfString) obj).toUnicodeString());
}
if (PdfName.AUTHOR.equals(key)) {
dc.addAuthor(((PdfString) obj).toUnicodeString());
}
if (PdfName.SUBJECT.equals(key)) {
dc.addSubject(((PdfString) obj).toUnicodeString());
dc.addDescription(((PdfString) obj).toUnicodeString());
}
if (PdfName.KEYWORDS.equals(key)) {
p.addKeywords(((PdfString) obj).toUnicodeString());
}
if (PdfName.CREATOR.equals(key)) {
basic.addCreatorTool(((PdfString) obj).toUnicodeString());
}
if (PdfName.PRODUCER.equals(key)) {
p.addProducer(((PdfString) obj).toUnicodeString());
}
if (PdfName.CREATIONDATE.equals(key)) {
basic.addCreateDate(((PdfDate) obj).getW3CDate());
}
if (PdfName.MODDATE.equals(key)) {
basic.addModDate(((PdfDate) obj).getW3CDate());
}
}
if (dc.size() > 0) addRdfDescription(dc);
if (p.size() > 0) addRdfDescription(p);
if (basic.size() > 0) addRdfDescription(basic);
if (PdfXConformance == PdfWriter.PDFA1A || PdfXConformance == PdfWriter.PDFA1B) {
PdfA1Schema a1 = new PdfA1Schema();
if (PdfXConformance == PdfWriter.PDFA1A)
a1.addConformance("A");
else
a1.addConformance("B");
addRdfDescription(a1);
}
}
}
/**
* @param os output stream
* @param info map of info
* @throws IOException on error
*/
public XmpWriter(OutputStream os, Map info) throws IOException {
this(os);
if (info != null) {
DublinCoreSchema dc = new DublinCoreSchema();
PdfSchema p = new PdfSchema();
XmpBasicSchema basic = new XmpBasicSchema();
String key;
String value;
for (Object o : info.entrySet()) {
Map.Entry entry = (Map.Entry) o;
key = (String) entry.getKey();
value = (String) entry.getValue();
if (value == null)
continue;
if ("Title".equals(key)) {
dc.addTitle(value);
}
if ("Author".equals(key)) {
dc.addAuthor(value);
}
if ("Subject".equals(key)) {
dc.addSubject(value);
dc.addDescription(value);
}
if ("Keywords".equals(key)) {
p.addKeywords(value);
}
if ("Creator".equals(key)) {
basic.addCreatorTool(value);
}
if ("Producer".equals(key)) {
p.addProducer(value);
}
if ("CreationDate".equals(key)) {
basic.addCreateDate(PdfDate.getW3CDate(value));
}
if ("ModDate".equals(key)) {
basic.addModDate(PdfDate.getW3CDate(value));
}
}
if (dc.size() > 0) addRdfDescription(dc);
if (p.size() > 0) addRdfDescription(p);
if (basic.size() > 0) addRdfDescription(basic);
}
}
/** Sets the XMP to read-only */
public void setReadOnly() {
end = 'r';
}
/**
* @param about The about to set.
*/
public void setAbout(String about) {
this.about = about;
}
/**
* Adds an rdf:Description.
* @param xmlns xml namespace
* @param content content
* @throws IOException on error
*/
public void addRdfDescription(String xmlns, String content) throws IOException {
writer.write("");
writer.write(content);
writer.write(" \n");
}
/**
* Adds an rdf:Description.
* @param s xmp schema
* @throws IOException on error
*/
public void addRdfDescription(XmpSchema s) throws IOException {
writer.write("");
writer.write(s.toString());
writer.write(" \n");
}
/**
* Flushes and closes the XmpWriter.
* @throws IOException on error
*/
public void close() throws IOException {
writer.write(" ");
writer.write(" \n");
for (int i = 0; i < extraSpace; i++) {
writer.write(EXTRASPACE);
}
writer.write(end == 'r' ? XPACKET_PI_END_R : XPACKET_PI_END_W);
writer.flush();
writer.close();
}
}