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/parser/Path.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.parser;

import com.itextpdf.awt.geom.Point2D;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Paths define shapes, trajectories, and regions of all sorts. They shall be used
 * to draw lines, define the shapes of filled areas, and specify boundaries for clipping
 * other graphics. A path shall be composed of straight and curved line segments, which
 * may connect to one another or may be disconnected.
 *
 * @since 5.5.6
 */
public class Path {

    private static final String START_PATH_ERR_MSG = "Path shall start with \"re\" or \"m\" operator";

    private List<Subpath> subpaths = new ArrayList<Subpath>();
    private Point2D currentPoint;

    public Path() {
    }

    public Path(List<? extends Subpath> subpaths) {
        addSubpaths(subpaths);
    }

    /**
     * @return A {@link java.util.List} of subpaths forming this path.
     */
    public List<Subpath> getSubpaths() {
        return subpaths;
    }

    /**
     * Adds the subpath to this path.
     *
     * @param subpath The subpath to be added to this path.
     */
    public void addSubpath(Subpath subpath) {
        subpaths.add(subpath);
        currentPoint = subpath.getLastPoint();
    }

    /**
     * Adds the subpaths to this path.
     *
     * @param subpaths {@link java.util.List} of subpaths to be added to this path.
     */
    public void addSubpaths(List<? extends Subpath> subpaths) {
        if (subpaths.size() > 0) {
            this.subpaths.addAll(subpaths);
            currentPoint = this.subpaths.get(subpaths.size() - 1).getLastPoint();
        }
    }

    /**
     * The current point is the trailing endpoint of the segment most recently added to the current path.
     *
     * @return The current point.
     */
    public Point2D getCurrentPoint() {
        return currentPoint;
    }

    /**
     * Begins a new subpath by moving the current point to coordinates <CODE>(x, y)</CODE>.
     */
    public void moveTo(final float x, final float y) {
        currentPoint = new Point2D.Float(x, y);
        Subpath lastSubpath = getLastSubpath();

        if (lastSubpath != null && lastSubpath.isSinglePointOpen()) {
            lastSubpath.setStartPoint(currentPoint);
        } else {
            subpaths.add(new Subpath(currentPoint));
        }
    }

    /**
     * Appends a straight line segment from the current point to the point <CODE>(x, y)</CODE>.
     */
    public void lineTo(final float x, final float y) {
        if (currentPoint == null) {
            throw new RuntimeException(START_PATH_ERR_MSG);
        }

        Point2D targetPoint = new Point2D.Float(x, y);
        getLastSubpath().addSegment(new Line(currentPoint, targetPoint));
        currentPoint = targetPoint;
    }

    /**
     * Appends a cubic Bezier curve to the current path. The curve shall extend from
     * the current point to the point <CODE>(x3, y3)</CODE>.
     */
    public void curveTo(final float x1, final float y1, final float x2, final float y2, final float x3, final float y3) {
        if (currentPoint == null) {
            throw new RuntimeException(START_PATH_ERR_MSG);
        }
        // Numbered in natural order
        Point2D secondPoint = new Point2D.Float(x1, y1);
        Point2D thirdPoint = new Point2D.Float(x2, y2);
        Point2D fourthPoint = new Point2D.Float(x3, y3);

        List<Point2D> controlPoints = new ArrayList(Arrays.asList(currentPoint, secondPoint, thirdPoint, fourthPoint));
        getLastSubpath().addSegment(new BezierCurve(controlPoints));

        currentPoint = fourthPoint;
    }

    /**
     * Appends a cubic Bezier curve to the current path. The curve shall extend from
     * the current point to the point <CODE>(x3, y3)</CODE> with the note that the current
     * point represents two control points.
     */
    public void curveTo(final float x2, final float y2, final float x3, final float y3) {
        if (currentPoint == null) {
            throw new RuntimeException(START_PATH_ERR_MSG);
        }

        curveTo((float) currentPoint.getX(), (float) currentPoint.getY(), x2, y2, x3, y3);
    }

    /**
     * Appends a cubic Bezier curve to the current path. The curve shall extend from
     * the current point to the point <CODE>(x3, y3)</CODE> with the note that the (x3, y3)
     * point represents two control points.
     */
    public void curveFromTo(final float x1, final float y1, final float x3, final float y3) {
        if (currentPoint == null) {
            throw new RuntimeException(START_PATH_ERR_MSG);
        }

        curveTo(x1, y1, x3, y3, x3, y3);
    }

    /**
     * Appends a rectangle to the current path as a complete subpath.
     */
    public void rectangle(final float x, final float y, final float w, final float h) {
        moveTo(x, y);
        lineTo(x + w, y);
        lineTo(x + w, y + h);
        lineTo(x, y + h);
        closeSubpath();
    }

    /**
     * Closes the current subpath.
     */
    public void closeSubpath() {
        Subpath lastSubpath = getLastSubpath();
        lastSubpath.setClosed(true);

        Point2D startPoint = lastSubpath.getStartPoint();
        moveTo((float) startPoint.getX(), (float) startPoint.getY());
    }

    /**
     * Closes all subpathes contained in this path.
     */
    public void closeAllSubpaths() {
        for (Subpath subpath : subpaths) {
            subpath.setClosed(true);
        }
    }

    /**
     * Adds additional line to each closed subpath and makes the subpath unclosed.
     * The line connects the last and the first points of the subpaths.
     *
     * @returns Indices of modified subpaths.
     */
    public List<Integer> replaceCloseWithLine() {
        List<Integer> modifiedSubpathsIndices = new ArrayList<Integer>();
        int i = 0;

            /* It could be replaced with "for" cycle, because IList in C# provides effective
             * access by index. In Java List interface has at least one implementation (LinkedList)
             * which is "bad" for access elements by index.
             */
        for (Subpath subpath : subpaths) {
            if (subpath.isClosed()) {
                subpath.setClosed(false);
                subpath.addSegment(new Line(subpath.getLastPoint(), subpath.getStartPoint()));
                modifiedSubpathsIndices.add(i);
            }

            ++i;
        }

        return modifiedSubpathsIndices;
    }

    /**
     * Path is empty if it contains no subpaths.
     */
    public boolean isEmpty() {
        return subpaths.size() == 0;
    }

    private Subpath getLastSubpath() {
        return subpaths.size() > 0 ? subpaths.get(subpaths.size() - 1) : null;
    }
}

⏎ com/itextpdf/text/pdf/parser/Path.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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