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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2024 Apryse Group NV
Authors: Apryse Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 .
*/
package com.itextpdf.kernel.pdf;
/**
* Beginning with BaseVersion 1.7, the extensions dictionary lets developers
* designate that a given document contains extensions to PDF. The presence
* of the extension dictionary in a document indicates that it may contain
* developer-specific PDF properties that extend a particular base version
* of the PDF specification.
* The extensions dictionary enables developers to identify their own extensions
* relative to a base version of PDF. Additionally, the convention identifies
* extension levels relative to that base version. The intent of this dictionary
* is to enable developers of PDF-producing applications to identify company-specific
* specifications that PDF-consuming applications use to interpret the extensions.
*/
public class PdfDeveloperExtension {
/** An instance of this class for Adobe 1.7 Extension level 3. */
public static final PdfDeveloperExtension ADOBE_1_7_EXTENSIONLEVEL3 =
new PdfDeveloperExtension(PdfName.ADBE, PdfName.Pdf_Version_1_7, 3);
/** An instance of this class for ETSI 1.7 Extension level 2. */
public static final PdfDeveloperExtension ESIC_1_7_EXTENSIONLEVEL2 =
new PdfDeveloperExtension(PdfName.ESIC, PdfName.Pdf_Version_1_7, 2);
/** An instance of this class for ETSI 1.7 Extension level 5. */
public static final PdfDeveloperExtension ESIC_1_7_EXTENSIONLEVEL5 =
new PdfDeveloperExtension(PdfName.ESIC, PdfName.Pdf_Version_1_7, 5);
/** An instance of this class for ISO/TS 32001. */
public static final PdfDeveloperExtension ISO_32001 = new PdfDeveloperExtension(
PdfName.ISO_,
PdfName.Pdf_Version_2_0,
32001,
"https://www.iso.org/standard/45874.html",
":2022",
true);
/** An instance of this class for ISO/TS 32002. */
public static final PdfDeveloperExtension ISO_32002 = new PdfDeveloperExtension(
PdfName.ISO_,
PdfName.Pdf_Version_2_0,
32002,
"https://www.iso.org/standard/45875.html",
":2022",
true);
/** The prefix used in the Extensions dictionary added to the Catalog. */
protected PdfName prefix;
/** The base version. */
protected PdfName baseVersion;
/** The extension level within the base version. */
protected int extensionLevel;
/** The extension URL (ISO 32000-2:2020). */
private final String url;
/** The extension revision (ISO 32000-2:2020). */
private final String extensionRevision;
/** Whether the extension prefix is multivalued (ISO 32000-2:2020). */
private final boolean isMultiValued;
/**
* Creates a PdfDeveloperExtension object.
* @param prefix the prefix referring to the developer
* @param baseVersion the number of the base version
* @param extensionLevel the extension level within the base version
*/
public PdfDeveloperExtension(PdfName prefix, PdfName baseVersion, int extensionLevel) {
this(prefix, baseVersion, extensionLevel, null, null, false);
}
/**
* Creates a PdfDeveloperExtension object.
* @param prefix the prefix referring to the developer
* @param baseVersion the number of the base version
* @param extensionLevel the extension level within the base version
* @param extensionRevision the extension revision identifier
* @param url the URL specifying where to find more information about the extension
* @param isMultiValued flag indicating whether the extension prefix can have multiple values
*/
public PdfDeveloperExtension(PdfName prefix, PdfName baseVersion, int extensionLevel,
String url, String extensionRevision, boolean isMultiValued) {
this.prefix = prefix;
this.baseVersion = baseVersion;
this.extensionLevel = extensionLevel;
this.url = url;
this.extensionRevision = extensionRevision;
this.isMultiValued = isMultiValued;
}
/**
* Gets the prefix name.
* @return a PdfName
*/
public PdfName getPrefix() {
return prefix;
}
/**
* Gets the baseVersion name.
* @return a PdfName
*/
public PdfName getBaseVersion() {
return baseVersion;
}
/**
* Gets the extension level within the baseVersion.
* @return an integer
*/
public int getExtensionLevel() {
return extensionLevel;
}
/**
* Indicates whether the extension prefix is multivalued (ISO 32000-2:2020).
*
* @return true if multivalued
*/
public boolean isMultiValued() {
return isMultiValued;
}
/**
* Generations the developer extension dictionary corresponding
* with the prefix.
* @return a PdfDictionary
*/
public PdfDictionary getDeveloperExtensions() {
PdfDictionary developerextensions = new PdfDictionary();
developerextensions.put(PdfName.BaseVersion, baseVersion);
developerextensions.put(PdfName.ExtensionLevel, new PdfNumber(extensionLevel));
if (url != null) {
developerextensions.put(PdfName.URL, new PdfString(url));
}
if (extensionRevision != null) {
developerextensions.put(PdfName.ExtensionRevision, new PdfString(extensionRevision));
}
return developerextensions;
}
}
