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/Element.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;

import java.util.List;

/**
 * Interface for a text element.
 * <P>
 * Remark: I looked at the interface javax.swing.text.Element, but I decided to
 * write my own text-classes for two reasons:
 * <OL>
 * <LI>The javax.swing.text-classes may be very generic, I think they are
 * overkill: they are to heavy for what they have to do.
 * <LI>A lot of people using iText (formerly known as rugPdf), still use
 * JDK1.1.x. I try to keep the Java2 requirements limited to the Collection
 * classes (I think they're really great). However, if I use the
 * javax.swing.text classes, it will become very difficult to downgrade rugPdf.
 * </OL>
 *
 * @see Anchor
 * @see Chapter
 * @see Chunk
 * @see Header
 * @see Image
 * @see Jpeg
 * @see List
 * @see ListItem
 * @see Meta
 * @see Paragraph
 * @see Phrase
 * @see Rectangle
 * @see Section
 */

public interface Element {

	// static membervariables (meta information)

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int HEADER = 0;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int TITLE = 1;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int SUBJECT = 2;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int KEYWORDS = 3;

	/** This is a possible type of <CODE>Element </CODE>. */
	public static final int AUTHOR = 4;

	/** This is a possible type of <CODE>Element </CODE>. */
	public static final int PRODUCER = 5;

	/** This is a possible type of <CODE>Element </CODE>. */
	public static final int CREATIONDATE = 6;

	/** This is a possible type of <CODE>Element </CODE>. */
	public static final int CREATOR = 7;

    /** This is a possible type of <CODE>Element </CODE>. */
    public static final int LANGUAGE = 8;

	// static membervariables (content)

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int CHUNK = 10;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int PHRASE = 11;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int PARAGRAPH = 12;

	/** This is a possible type of <CODE>Element</CODE> */
	public static final int SECTION = 13;

	/** This is a possible type of <CODE>Element</CODE> */
	public static final int LIST = 14;

	/** This is a possible type of <CODE>Element</CODE> */
	public static final int LISTITEM = 15;

	/** This is a possible type of <CODE>Element</CODE> */
	public static final int CHAPTER = 16;

	/** This is a possible type of <CODE>Element</CODE> */
	public static final int ANCHOR = 17;

	// static membervariables (tables)

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int PTABLE = 23;

	// static membervariables (annotations)

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int ANNOTATION = 29;

	// static membervariables (geometric figures)

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int RECTANGLE = 30;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int JPEG = 32;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int JPEG2000 = 33;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int IMGRAW = 34;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int IMGTEMPLATE = 35;

	/**
	 * This is a possible type of <CODE>Element</CODE>.
	 * @since	2.1.5
	 */
	public static final int JBIG2 = 36;

    /** This is a possible type of <CODE>Element</CODE>. */
	public static final int DIV = 37;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int BODY = 38;

	/** This is a possible type of <CODE>Element</CODE>. */
	public static final int MARKED = 50;

	/** This is a possible type of <CODE>Element</CODE>.
	 * @since 2.1.2
	 */
	public static final int YMARK = 55;

	/**
	 * This is an element thats not an element.
	 * @see WritableDirectElement
	 */
	public static final int WRITABLE_DIRECT = 666;

	// static membervariables (alignment)

	/**
	 * A possible value for paragraph alignment. This specifies that the text is
	 * aligned to the left indent and extra whitespace should be placed on the
	 * right.
	 */
	public static final int ALIGN_UNDEFINED = -1;

	/**
	 * A possible value for paragraph alignment. This specifies that the text is
	 * aligned to the left indent and extra whitespace should be placed on the
	 * right.
	 */
	public static final int ALIGN_LEFT = 0;

	/**
	 * A possible value for paragraph alignment. This specifies that the text is
	 * aligned to the center and extra whitespace should be placed equally on
	 * the left and right.
	 */
	public static final int ALIGN_CENTER = 1;

	/**
	 * A possible value for paragraph alignment. This specifies that the text is
	 * aligned to the right indent and extra whitespace should be placed on the
	 * left.
	 */
	public static final int ALIGN_RIGHT = 2;

	/**
	 * A possible value for paragraph alignment. This specifies that extra
	 * whitespace should be spread out through the rows of the paragraph with
	 * the text lined up with the left and right indent except on the last line
	 * which should be aligned to the left.
	 */
	public static final int ALIGN_JUSTIFIED = 3;

	/**
	 * A possible value for vertical alignment.
	 */

	public static final int ALIGN_TOP = 4;

	/**
	 * A possible value for vertical alignment.
	 */

	public static final int ALIGN_MIDDLE = 5;

	/**
	 * A possible value for vertical alignment.
	 */

	public static final int ALIGN_BOTTOM = 6;

	/**
	 * A possible value for vertical alignment.
	 */
	public static final int ALIGN_BASELINE = 7;

	/**
	 * Does the same as ALIGN_JUSTIFIED but the last line is also spread out.
	 */
	public static final int ALIGN_JUSTIFIED_ALL = 8;

	// static member variables for CCITT compression

	/**
	 * Pure two-dimensional encoding (Group 4)
	 */
	public static final int CCITTG4 = 0x100;

	/**
	 * Pure one-dimensional encoding (Group 3, 1-D)
	 */
	public static final int CCITTG3_1D = 0x101;

	/**
	 * Mixed one- and two-dimensional encoding (Group 3, 2-D)
	 */
	public static final int CCITTG3_2D = 0x102;

	/**
	 * A flag indicating whether 1-bits are to be interpreted as black pixels
	 * and 0-bits as white pixels,
	 */
	public static final int CCITT_BLACKIS1 = 1;

	/**
	 * A flag indicating whether the filter expects extra 0-bits before each
	 * encoded line so that the line begins on a byte boundary.
	 */
	public static final int CCITT_ENCODEDBYTEALIGN = 2;

	/**
	 * A flag indicating whether end-of-line bit patterns are required to be
	 * present in the encoding.
	 */
	public static final int CCITT_ENDOFLINE = 4;

	/**
	 * A flag indicating whether the filter expects the encoded data to be
	 * terminated by an end-of-block pattern, overriding the Rows parameter. The
	 * use of this flag will set the key /EndOfBlock to false.
	 */
	public static final int CCITT_ENDOFBLOCK = 8;

	// methods

	/**
	 * Processes the element by adding it (or the different parts) to an <CODE>
	 * ElementListener</CODE>.
	 *
	 * @param listener
	 *            an <CODE>ElementListener</CODE>
	 * @return <CODE>true</CODE> if the element was processed successfully
	 */

	public boolean process(ElementListener listener);

	/**
	 * Gets the type of the text element.
	 *
	 * @return a type
	 */

	public int type();

	/**
	 * Checks if this element is a content object.
	 * If not, it's a metadata object.
	 * @since	iText 2.0.8
	 * @return	true if this is a 'content' element; false if this is a 'metadata' element
	 */

	public boolean isContent();

	/**
	 * Checks if this element is nestable.
	 * @since	iText 2.0.8
	 * @return	true if this element can be nested inside other elements.
	 */

	public boolean isNestable();

	/**
	 * Gets all the chunks in this element.
	 *
	 * @return an <CODE>ArrayList</CODE>
	 */

	public List<Chunk> getChunks();

	/**
	 * Gets the content of the text element.
	 *
	 * @return a type
	 */

	public String toString();
}

⏎ com/itextpdf/text/Element.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

⇐ iText layout.jar Source Code

⇑ Download and Install iText Java Library

⇑⇑ iText for PDF Generation