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iText, a free Java-PDF library
/*
* $Id: XmpWriter.java 4784 2011-03-15 08:33:00Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 1T3XT BVBA
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.xml.xmp;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.Map;
import com.itextpdf.text.pdf.PdfDate;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfObject;
import com.itextpdf.text.pdf.PdfString;
import com.itextpdf.text.pdf.PdfWriter;
/**
* 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 {
/** 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
* @param utfEncoding
* @param extraSpace
* @throws IOException
*/
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
* @throws IOException
*/
public XmpWriter(OutputStream os) throws IOException {
this(os, UTF8, 20);
}
/** 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
* @param content
* @throws IOException
*/
public void addRdfDescription(String xmlns, String content) throws IOException {
writer.write("");
writer.write(content);
writer.write(" \n");
}
/**
* Adds an rdf:Description.
* @param s
* @throws IOException
*/
public void addRdfDescription(XmpSchema s) throws IOException {
writer.write("");
writer.write(s.toString());
writer.write(" \n");
}
/**
* Flushes and closes the XmpWriter.
* @throws IOException
*/
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();
}
/**
* @param os
* @param info
* @throws IOException
*/
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
* @param info
* @throws IOException
* @since 5.0.1 (generic type in signature)
*/
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 (Map.Entry entry: info.entrySet()) {
key = entry.getKey();
value = 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);
}
}
}