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iText, a free Java-PDF library
/*
* $Id: XmpWriter.java 6286 2014-02-21 16:46:34Z rafhens $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2014 iText Group NV
* 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
* ITEXT GROUP. ITEXT GROUP 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.util.Map;
import com.itextpdf.text.Version;
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.xmp.*;
import com.itextpdf.xmp.options.PropertyOptions;
import com.itextpdf.xmp.options.SerializeOptions;
/**
* 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";
protected XMPMeta xmpMeta;
protected OutputStream outputStream;
protected SerializeOptions serializeOptions;
/**
* Creates an XmpWriter.
* @param os
* @param utfEncoding
* @param extraSpace
* @throws IOException
*/
public XmpWriter(OutputStream os, String utfEncoding, int extraSpace) throws IOException {
outputStream = os;
serializeOptions = new SerializeOptions();
if (UTF16BE.equals(utfEncoding) || UTF16.equals(utfEncoding))
serializeOptions.setEncodeUTF16BE(true);
else if (UTF16LE.equals(utfEncoding))
serializeOptions.setEncodeUTF16LE(true);
serializeOptions.setPadding(extraSpace);
xmpMeta = XMPMetaFactory.create();
xmpMeta.setObjectName(XMPConst.TAG_XMPMETA);
xmpMeta.setObjectName("");
try {
xmpMeta.setProperty(XMPConst.NS_DC, DublinCoreProperties.FORMAT, "application/pdf");
xmpMeta.setProperty(XMPConst.NS_PDF, PdfProperties.PRODUCER, Version.getInstance().getVersion());
} catch (XMPException xmpExc) {}
}
/**
* Creates an XmpWriter.
* @param os
* @throws IOException
*/
public XmpWriter(OutputStream os) throws IOException {
this(os, UTF8, 2000);
}
/**
* @param os
* @param info
* @throws IOException
*/
public XmpWriter(OutputStream os, PdfDictionary info) throws IOException {
this(os);
if (info != null) {
PdfName key;
PdfObject obj;
String value;
for (PdfName pdfName : info.getKeys()) {
key = pdfName;
obj = info.get(key);
if (obj == null)
continue;
if (!obj.isString())
continue;
value = ((PdfString) obj).toUnicodeString();
try {
addDocInfoProperty(key, value);
} catch (XMPException xmpExc) {
throw new IOException(xmpExc.getMessage());
}
}
}
}
/**
* @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) {
String key;
String value;
for (Map.Entry entry : info.entrySet()) {
key = entry.getKey();
value = entry.getValue();
if (value == null)
continue;
try {
addDocInfoProperty(key, value);
} catch (XMPException xmpExc) {
throw new IOException(xmpExc.getMessage());
}
}
}
}
public XMPMeta getXmpMeta() {
return xmpMeta;
}
/** Sets the XMP to read-only */
public void setReadOnly() {
serializeOptions.setReadOnlyPacket(true);
}
/**
* @param about The about to set.
*/
public void setAbout(String about) {
xmpMeta.setObjectName(about);
}
/**
* Adds an rdf:Description.
* @param xmlns
* @param content
* @throws IOException
*/
@Deprecated
public void addRdfDescription(String xmlns, String content) throws IOException {
try {
String str = "" +
"" +
content +
" \n";
XMPMeta extMeta = XMPMetaFactory.parseFromString(str);
XMPUtils.appendProperties(extMeta, xmpMeta, true, true);
} catch (XMPException xmpExc) {
throw new IOException(xmpExc.getMessage());
}
}
/**
* Adds an rdf:Description.
* @param s
* @throws IOException
*/
@Deprecated
public void addRdfDescription(XmpSchema s) throws IOException {
try {
String str = "" +
"" +
s.toString() +
" \n";
XMPMeta extMeta = XMPMetaFactory.parseFromString(str);
XMPUtils.appendProperties(extMeta, xmpMeta, true, true);
} catch (XMPException xmpExc) {
throw new IOException(xmpExc.getMessage());
}
}
/**
* @param schemaNS The namespace URI for the property. Has the same usage as in getProperty.
* @param propName The name of the property.
* Has the same usage as in getProperty().
* @param value the value for the property (only leaf properties have a value).
* Arrays and non-leaf levels of structs do not have values.
* Must be null if the value is not relevant.
* The value is automatically detected: Boolean, Integer, Long, Double, XMPDateTime and
* byte[] are handled, on all other toString() is called.
* @throws XMPException Wraps all errors and exceptions that may occur.
*/
public void setProperty(String schemaNS, String propName, Object value) throws XMPException {
xmpMeta.setProperty(schemaNS, propName, value);
}
/**
* Simplifies the construction of an array by not requiring that you pre-create an empty array.
* The array that is assigned is created automatically if it does not yet exist. Each call to
* appendArrayItem() appends an item to the array.
*
* @param schemaNS The namespace URI for the array.
* @param arrayName The name of the array. May be a general path expression, must not be null or
* the empty string.
* @param value the value of the array item.
* @throws XMPException Wraps all errors and exceptions that may occur.
*/
public void appendArrayItem(String schemaNS, String arrayName, String value) throws XMPException {
xmpMeta.appendArrayItem(schemaNS, arrayName, new PropertyOptions(PropertyOptions.ARRAY), value, null);
}
/**
* Simplifies the construction of an ordered array by not requiring that you pre-create an empty array.
* The array that is assigned is created automatically if it does not yet exist. Each call to
* appendArrayItem() appends an item to the array.
*
* @param schemaNS The namespace URI for the array.
* @param arrayName The name of the array. May be a general path expression, must not be null or
* the empty string.
* @param value the value of the array item.
* @throws XMPException Wraps all errors and exceptions that may occur.
*/
public void appendOrderedArrayItem(String schemaNS, String arrayName, String value) throws XMPException {
xmpMeta.appendArrayItem(schemaNS, arrayName, new PropertyOptions(PropertyOptions.ARRAY_ORDERED), value, null);
}
/**
* Simplifies the construction of an alternate array by not requiring that you pre-create an empty array.
* The array that is assigned is created automatically if it does not yet exist. Each call to
* appendArrayItem() appends an item to the array.
*
* @param schemaNS The namespace URI for the array.
* @param arrayName The name of the array. May be a general path expression, must not be null or
* the empty string.
* @param value the value of the array item.
* @throws XMPException Wraps all errors and exceptions that may occur.
*/
public void appendAlternateArrayItem(String schemaNS, String arrayName, String value) throws XMPException {
xmpMeta.appendArrayItem(schemaNS, arrayName, new PropertyOptions(PropertyOptions.ARRAY_ALTERNATE), value, null);
}
/**
* Flushes and closes the XmpWriter.
* @throws IOException
*/
public void serialize(OutputStream externalOutputStream) throws XMPException {
XMPMetaFactory.serialize(xmpMeta, externalOutputStream, serializeOptions);
}
/**
* Flushes and closes the XmpWriter.
* @throws IOException
*/
public void close() throws IOException {
if (outputStream == null)
return;
try {
XMPMetaFactory.serialize(xmpMeta, outputStream, serializeOptions);
outputStream = null;
} catch (XMPException xmpExc) {
throw new IOException(xmpExc.getMessage());
}
}
public void addDocInfoProperty(Object key, String value) throws XMPException {
if (key instanceof String)
key = new PdfName((String) key);
if (PdfName.TITLE.equals(key)) {
xmpMeta.setLocalizedText(XMPConst.NS_DC, DublinCoreProperties.TITLE, XMPConst.X_DEFAULT, XMPConst.X_DEFAULT, value);
} else if (PdfName.AUTHOR.equals(key)) {
xmpMeta.appendArrayItem(XMPConst.NS_DC, DublinCoreProperties.CREATOR, new PropertyOptions(PropertyOptions.ARRAY_ORDERED), value, null);
} else if (PdfName.SUBJECT.equals(key)) {
xmpMeta.setLocalizedText(XMPConst.NS_DC, DublinCoreProperties.DESCRIPTION, XMPConst.X_DEFAULT, XMPConst.X_DEFAULT, value);
} else if (PdfName.KEYWORDS.equals(key)) {
for (String v : value.split(",|;"))
if (v.trim().length() > 0)
xmpMeta.appendArrayItem(XMPConst.NS_DC, DublinCoreProperties.SUBJECT, new PropertyOptions(PropertyOptions.ARRAY), v.trim(), null);
xmpMeta.setProperty(XMPConst.NS_PDF, PdfProperties.KEYWORDS, value);
} else if (PdfName.PRODUCER.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_PDF, PdfProperties.PRODUCER, value);
} else if (PdfName.CREATOR.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_XMP, XmpBasicProperties.CREATORTOOL, value);
} else if (PdfName.CREATIONDATE.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_XMP, XmpBasicProperties.CREATEDATE, PdfDate.getW3CDate(value));
} else if (PdfName.MODDATE.equals(key)) {
xmpMeta.setProperty(XMPConst.NS_XMP, XmpBasicProperties.MODIFYDATE, PdfDate.getW3CDate(value));
}
}
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