itextpdf.jar is a component in iText 5 Java library to provide core functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided at iText GitHub site.

You can compile it to generate your JAR file, using pom.xml as the build configuration file.

The source code of itextpdf-5.5.14.jar is provided below:

⏎ com/itextpdf/text/pdf/PdfCopyForms.java

/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2020 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: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import java.io.IOException;
import java.io.OutputStream;
import java.security.cert.Certificate;
import java.util.HashMap;
import java.util.List;

import com.itextpdf.text.DocWriter;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.interfaces.PdfEncryptionSettings;
import com.itextpdf.text.pdf.interfaces.PdfViewerPreferences;

/**
 * Allows you to add one (or more) existing PDF document(s) to
 * create a new PDF and add the form of another PDF document to
 * this new PDF.
 * @since 2.1.5
 * @deprecated since 5.5.2
 */
public class PdfCopyForms
	implements PdfViewerPreferences, PdfEncryptionSettings {

	/** The class with the actual implementations. */
    private PdfCopyFormsImp fc;

    /**
     * Creates a new instance.
     * @param os the output stream
     * @throws DocumentException on error
     */
    public PdfCopyForms(OutputStream os) throws DocumentException {
        fc = new PdfCopyFormsImp(os);
    }

    /**
     * Concatenates a PDF document.
     * @param reader the PDF document
     * @throws DocumentException on error
     */
    public void addDocument(PdfReader reader) throws DocumentException, IOException {
        fc.addDocument(reader);
    }

    /**
     * Concatenates a PDF document selecting the pages to keep. The pages are described as a
     * <CODE>List</CODE> of <CODE>Integer</CODE>. The page ordering can be changed but
     * no page repetitions are allowed.
     * @param reader the PDF document
     * @param pagesToKeep the pages to keep
     * @throws DocumentException on error
     */
    public void addDocument(PdfReader reader, List<Integer> pagesToKeep) throws DocumentException, IOException {
        fc.addDocument(reader, pagesToKeep);
    }

    /**
     * Concatenates a PDF document selecting the pages to keep. The pages are described as
     * ranges. The page ordering can be changed but
     * no page repetitions are allowed.
     * @param reader the PDF document
     * @param ranges the comma separated ranges as described in {@link SequenceList}
     * @throws DocumentException on error
     */
    public void addDocument(PdfReader reader, String ranges) throws DocumentException, IOException {
        fc.addDocument(reader, SequenceList.expand(ranges, reader.getNumberOfPages()));
    }

    /**
     *Copies the form fields of this PDFDocument onto the PDF-Document which was added
     * @param reader the PDF document
     * @throws DocumentException on error
     */
    public void copyDocumentFields(PdfReader reader) throws DocumentException{
        fc.copyDocumentFields(reader);
    }

    /** Sets the encryption options for this document. The userPassword and the
     *  ownerPassword can be null or have zero length. In this case the ownerPassword
     *  is replaced by a random string. The open permissions for the document can be
     *  AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
     *  AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
     *  The permissions can be combined by ORing them.
     * @param userPassword the user password. Can be null or empty
     * @param ownerPassword the owner password. Can be null or empty
     * @param permissions the user permissions
     * @param strength128Bits <code>true</code> for 128 bit key length, <code>false</code> for 40 bit key length
     * @throws DocumentException if the document is already open
     */
    public void setEncryption(byte userPassword[], byte ownerPassword[], int permissions, boolean strength128Bits) throws DocumentException {
    	fc.setEncryption(userPassword, ownerPassword, permissions, strength128Bits ? PdfWriter.STANDARD_ENCRYPTION_128 : PdfWriter.STANDARD_ENCRYPTION_40);
    }

    /**
     * Sets the encryption options for this document. The userPassword and the
     *  ownerPassword can be null or have zero length. In this case the ownerPassword
     *  is replaced by a random string. The open permissions for the document can be
     *  AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
     *  AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
     *  The permissions can be combined by ORing them.
     * @param strength true for 128 bit key length. false for 40 bit key length
     * @param userPassword the user password. Can be null or empty
     * @param ownerPassword the owner password. Can be null or empty
     * @param permissions the user permissions
     * @throws DocumentException if the document is already open
     */
    public void setEncryption(boolean strength, String userPassword, String ownerPassword, int permissions) throws DocumentException {
        setEncryption(DocWriter.getISOBytes(userPassword), DocWriter.getISOBytes(ownerPassword), permissions, strength);
    }

    /**
     * Closes the output document.
     */
    public void close() {
        fc.close();
    }

    /**
     * Opens the document. This is usually not needed as addDocument() will do it
     * automatically.
     */
    public void open() {
        fc.openDoc();
    }

    /**
     * Adds JavaScript to the global document
     * @param js the JavaScript
     */
    public void addJavaScript(String js) {
        fc.addJavaScript(js, !PdfEncodings.isPdfDocEncoding(js));
    }

    /**
     * Sets the bookmarks. The list structure is defined in
     * <CODE>SimpleBookmark#</CODE>.
     * @param outlines the bookmarks or <CODE>null</CODE> to remove any
     */
    public void setOutlines(List<HashMap<String, Object>> outlines) {
        fc.setOutlines(outlines);
    }

    /** Gets the underlying PdfWriter.
     * @return the underlying PdfWriter
     */
    public PdfWriter getWriter() {
        return fc;
    }

    /**
     * Gets the 1.5 compression status.
     * @return <code>true</code> if the 1.5 compression is on
     */
    public boolean isFullCompression() {
        return fc.isFullCompression();
    }

    /**
     * Sets the document's compression to the new 1.5 mode with object streams and xref
     * streams. It can be set at any time but once set it can't be unset.
     * <p>
     * If set before opening the document it will also set the pdf version to 1.5.
     */
    public void setFullCompression() throws DocumentException {
        fc.setFullCompression();
    }

	/**
	 * @see com.itextpdf.text.pdf.interfaces.PdfEncryptionSettings#setEncryption(byte[], byte[], int, int)
	 */
	public void setEncryption(byte[] userPassword, byte[] ownerPassword, int permissions, int encryptionType) throws DocumentException {
		fc.setEncryption(userPassword, ownerPassword, permissions, encryptionType);
	}

	/**
	 * @see com.itextpdf.text.pdf.interfaces.PdfViewerPreferences#addViewerPreference(com.itextpdf.text.pdf.PdfName, com.itextpdf.text.pdf.PdfObject)
	 */
	public void addViewerPreference(PdfName key, PdfObject value) {
		fc.addViewerPreference(key, value);
	}

	/**
	 * @see com.itextpdf.text.pdf.interfaces.PdfViewerPreferences#setViewerPreferences(int)
	 */
	public void setViewerPreferences(int preferences) {
		fc.setViewerPreferences(preferences);
	}

	/**
	 * @see com.itextpdf.text.pdf.interfaces.PdfEncryptionSettings#setEncryption(java.security.cert.Certificate[], int[], int)
	 */
	public void setEncryption(Certificate[] certs, int[] permissions, int encryptionType) throws DocumentException {
		fc.setEncryption(certs, permissions, encryptionType);
	}
}

⏎ com/itextpdf/text/pdf/PdfCopyForms.java

Or download all of them as a single archive file:

File name: itextpdf-5.5.14-fyi.zip
File size: 2163839 bytes
Release date: 2009-10-09
Download 

⇒ iText-2.1.6.jar - iText, a JAVA-PDF library

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