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/ErrorCorrectionLevel.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, 6.5.1. This enum encapsulates the four error correction levels
 * defined by the QR code standard.</p>
 *
 * @author Sean Owen
 * @since 5.0.2
 */
public final class ErrorCorrectionLevel {

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

  /**
   * L = ~7% correction
   */
  public static final ErrorCorrectionLevel L = new ErrorCorrectionLevel(0, 0x01, "L");
  /**
   * M = ~15% correction
   */
  public static final ErrorCorrectionLevel M = new ErrorCorrectionLevel(1, 0x00, "M");
  /**
   * Q = ~25% correction
   */
  public static final ErrorCorrectionLevel Q = new ErrorCorrectionLevel(2, 0x03, "Q");
  /**
   * H = ~30% correction
   */
  public static final ErrorCorrectionLevel H = new ErrorCorrectionLevel(3, 0x02, "H");

  private static final ErrorCorrectionLevel[] FOR_BITS = {M, L, H, Q};

  private final int ordinal;
  private final int bits;
  private final String name;

  private ErrorCorrectionLevel(int ordinal, int bits, String name) {
    this.ordinal = ordinal;
    this.bits = bits;
    this.name = name;
  }

  public int ordinal() {
    return ordinal;
  }

  public int getBits() {
    return bits;
  }

  public String getName() {
    return name;
  }

  public String toString() {
    return name;
  }

  /**
   * @param bits int containing the two bits encoding a QR Code's error correction level
   * @return {@link ErrorCorrectionLevel} representing the encoded error correction level
   */
  public static ErrorCorrectionLevel forBits(int bits) {
    if (bits < 0 || bits >= FOR_BITS.length) {
      throw new IllegalArgumentException();
    }
    return FOR_BITS[bits];
  }


}

⏎ com/itextpdf/text/pdf/qrcode/ErrorCorrectionLevel.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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⇒ iText-2.1.6.jar - iText, a JAVA-PDF library

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