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/qrcode/Mode.java

/*
 * Copyright 2007 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.itextpdf.text.pdf.qrcode;

/**
 * <p>See ISO 18004:2006, 6.4.1, Tables 2 and 3. This enum encapsulates the various modes in which
 * data can be encoded to bits in the QR code standard.</p>
 *
 * @author Sean Owen
 * @since 5.0.2
 */
public final class Mode {

  // No, we can't use an enum here. J2ME doesn't support it.

  public static final Mode TERMINATOR = new Mode(new int[]{0, 0, 0}, 0x00, "TERMINATOR"); // Not really a mode...
  public static final Mode NUMERIC = new Mode(new int[]{10, 12, 14}, 0x01, "NUMERIC");
  public static final Mode ALPHANUMERIC = new Mode(new int[]{9, 11, 13}, 0x02, "ALPHANUMERIC");
  public static final Mode STRUCTURED_APPEND = new Mode(new int[]{0, 0, 0}, 0x03, "STRUCTURED_APPEND"); // Not supported
  public static final Mode BYTE = new Mode(new int[]{8, 16, 16}, 0x04, "BYTE");
  public static final Mode ECI = new Mode(null, 0x07, "ECI"); // character counts don't apply
  public static final Mode KANJI = new Mode(new int[]{8, 10, 12}, 0x08, "KANJI");
  public static final Mode FNC1_FIRST_POSITION = new Mode(null, 0x05, "FNC1_FIRST_POSITION");
  public static final Mode FNC1_SECOND_POSITION = new Mode(null, 0x09, "FNC1_SECOND_POSITION");

  private final int[] characterCountBitsForVersions;
  private final int bits;
  private final String name;

  private Mode(int[] characterCountBitsForVersions, int bits, String name) {
    this.characterCountBitsForVersions = characterCountBitsForVersions;
    this.bits = bits;
    this.name = name;
  }

  /**
   * @param bits four bits encoding a QR Code data mode
   * @return {@link Mode} encoded by these bits
   * @throws IllegalArgumentException if bits do not correspond to a known mode
   */
  public static Mode forBits(int bits) {
    switch (bits) {
      case 0x0:
        return TERMINATOR;
      case 0x1:
        return NUMERIC;
      case 0x2:
        return ALPHANUMERIC;
      case 0x3:
        return STRUCTURED_APPEND;
      case 0x4:
        return BYTE;
      case 0x5:
        return FNC1_FIRST_POSITION;
      case 0x7:
        return ECI;
      case 0x8:
        return KANJI;
      case 0x9:
        return FNC1_SECOND_POSITION;
      default:
        throw new IllegalArgumentException();
    }
  }

  /**
   * @param version version in question
   * @return number of bits used, in this QR Code symbol {@link Version}, to encode the
   *         count of characters that will follow encoded in this {@link Mode}
   */
  public int getCharacterCountBits(Version version) {
    if (characterCountBitsForVersions == null) {
      throw new IllegalArgumentException("Character count doesn't apply to this mode");
    }
    int number = version.getVersionNumber();
    int offset;
    if (number <= 9) {
      offset = 0;
    } else if (number <= 26) {
      offset = 1;
    } else {
      offset = 2;
    }
    return characterCountBitsForVersions[offset];
  }

  public int getBits() {
    return bits;
  }

  public String getName() {
    return name;
  }

  public String toString() {
    return name;
  }

}

⏎ com/itextpdf/text/pdf/qrcode/Mode.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
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