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/fonts/cmaps/CMapToUnicode.java

/**
 * Copyright (c) 2005, www.fontbox.org
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of fontbox; nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * http://www.fontbox.org
 *
 */
package com.itextpdf.text.pdf.fonts.cmaps;

import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.Utilities;
import com.itextpdf.text.pdf.PdfObject;
import com.itextpdf.text.pdf.PdfString;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import com.itextpdf.text.error_messages.MessageLocalization;

/**
 * This class represents a CMap file.
 *
 * @author Ben Litchfield (ben@benlitchfield.com)
 * @since	2.1.4
 */
public class CMapToUnicode extends AbstractCMap {

    private Map<Integer, String> singleByteMappings = new HashMap<Integer, String>();
    private Map<Integer, String> doubleByteMappings = new HashMap<Integer, String>();

    /**
     * Creates a new instance of CMap.
     */
    public CMapToUnicode() {
        //default constructor
    }

    /**
     * This will tell if this cmap has any one byte mappings.
     *
     * @return true If there are any one byte mappings, false otherwise.
     */
    public boolean hasOneByteMappings() {
        return !singleByteMappings.isEmpty();
    }

    /**
     * This will tell if this cmap has any two byte mappings.
     *
     * @return true If there are any two byte mappings, false otherwise.
     */
    public boolean hasTwoByteMappings() {
        return !doubleByteMappings.isEmpty();
    }

    /**
     * This will perform a lookup into the map.
     *
     * @param code The code used to lookup.
     * @param offset The offset into the byte array.
     * @param length The length of the data we are getting.
     *
     * @return The string that matches the lookup.
     */
    public String lookup(byte[] code, int offset, int length) {

        String result = null;
        Integer key = null;
        if (length == 1) {

            key = Integer.valueOf(code[offset] & 0xff);
            result = singleByteMappings.get(key);
        } else if (length == 2) {
            int intKey = code[offset] & 0xff;
            intKey <<= 8;
            intKey += code[offset + 1] & 0xff;
            key = Integer.valueOf(intKey);

            result = doubleByteMappings.get(key);
        }

        return result;
    }

    public Map<Integer, Integer> createReverseMapping() throws IOException {
        Map<Integer, Integer> result = new HashMap<Integer, Integer>();
        for (Map.Entry<Integer, String> entry : singleByteMappings.entrySet()) {
            result.put(convertToInt(entry.getValue()), entry.getKey());
        }
        for (Map.Entry<Integer, String> entry : doubleByteMappings.entrySet()) {
            result.put(convertToInt(entry.getValue()), entry.getKey());
        }
        return result;
    }

    public Map<Integer, Integer> createDirectMapping() throws IOException {
        Map<Integer, Integer> result = new HashMap<Integer, Integer>();
        for (Map.Entry<Integer, String> entry : singleByteMappings.entrySet()) {
            result.put(entry.getKey(), convertToInt(entry.getValue()));
        }
        for (Map.Entry<Integer, String> entry : doubleByteMappings.entrySet()) {
            result.put(entry.getKey(), convertToInt(entry.getValue()));
        }
        return result;
    }

    private int convertToInt(String s) throws IOException {
        byte[] b = s.getBytes("UTF-16BE");
        int value = 0;
        for (int i = 0; i < b.length - 1; i++) {
            value += b[i] & 0xff;
            value <<= 8;
        }
        value += b[b.length - 1] & 0xff;
        return value;
    }

    void addChar(int cid, String uni) {
        doubleByteMappings.put(Integer.valueOf(cid), uni);
    }
    
    @Override
    void addChar(PdfString mark, PdfObject code) {
        try {
            byte[] src = mark.getBytes();
            String dest = createStringFromBytes(code.getBytes());
            if (src.length == 1) {
                singleByteMappings.put(Integer.valueOf(src[0] & 0xff), dest);
            } else if (src.length == 2) {
                int intSrc = src[0] & 0xFF;
                intSrc <<= 8;
                intSrc |= src[1] & 0xFF;
                doubleByteMappings.put(Integer.valueOf(intSrc), dest);
            } else {
                throw new IOException(MessageLocalization.getComposedMessage("mapping.code.should.be.1.or.two.bytes.and.not.1", src.length));
            }
        }
        catch (Exception ex) {
            throw new ExceptionConverter(ex);
        }
    }
    
    private String createStringFromBytes(byte[] bytes) throws IOException {
        String retval = null;
        if (bytes.length == 1) {
            retval = new String(bytes);
        } else {
            retval = new String(bytes, "UTF-16BE");
        }
        return retval;
    }

    public static CMapToUnicode getIdentity() {
        CMapToUnicode uni = new CMapToUnicode();
        for (int i = 0; i < 65537; i++) {
            uni.addChar(i, Utilities.convertFromUtf32(i));
        }
        return uni;
    }
}

⏎ com/itextpdf/text/pdf/fonts/cmaps/CMapToUnicode.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

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⇑⇑ iText for PDF Generation