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/QRCode.java

/*
 * Copyright 2008 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;


/**
 * @author satorux@google.com (Satoru Takabayashi) - creator
 * @author dswitkin@google.com (Daniel Switkin) - ported from C++
 * @since 5.0.2
 */
public final class QRCode {

  public static final int NUM_MASK_PATTERNS = 8;

  private Mode mode;
  private ErrorCorrectionLevel ecLevel;
  private int version;
  private int matrixWidth;
  private int maskPattern;
  private int numTotalBytes;
  private int numDataBytes;
  private int numECBytes;
  private int numRSBlocks;
  private ByteMatrix matrix;

  public QRCode() {
    mode = null;
    ecLevel = null;
    version = -1;
    matrixWidth = -1;
    maskPattern = -1;
    numTotalBytes = -1;
    numDataBytes = -1;
    numECBytes = -1;
    numRSBlocks = -1;
    matrix = null;
  }

  // Mode of the QR Code.
  public Mode getMode() {
    return mode;
  }

  // Error correction level of the QR Code.
  public ErrorCorrectionLevel getECLevel() {
    return ecLevel;
  }

  // Version of the QR Code.  The bigger size, the bigger version.
  public int getVersion() {
    return version;
  }

  // ByteMatrix width of the QR Code.
  public int getMatrixWidth() {
    return matrixWidth;
  }

  // Mask pattern of the QR Code.
  public int getMaskPattern() {
    return maskPattern;
  }

  // Number of total bytes in the QR Code.
  public int getNumTotalBytes() {
    return numTotalBytes;
  }

  // Number of data bytes in the QR Code.
  public int getNumDataBytes() {
    return numDataBytes;
  }

  // Number of error correction bytes in the QR Code.
  public int getNumECBytes() {
    return numECBytes;
  }

  // Number of Reedsolomon blocks in the QR Code.
  public int getNumRSBlocks() {
    return numRSBlocks;
  }

  // ByteMatrix data of the QR Code.
  public ByteMatrix getMatrix() {
    return matrix;
  }
  

  // Return the value of the module (cell) pointed by "x" and "y" in the matrix of the QR Code. They
  // call cells in the matrix "modules". 1 represents a black cell, and 0 represents a white cell.
  public int at(int x, int y) {
    // The value must be zero or one.
    int value = matrix.get(x, y);
    if (!(value == 0 || value == 1)) {
      // this is really like an assert... not sure what better exception to use?
      throw new RuntimeException("Bad value");
    }
    return value;
  }

  // Checks all the member variables are set properly. Returns true on success. Otherwise, returns
  // false.
  public boolean isValid() {
    return
        // First check if all version are not uninitialized.
        mode != null &&
        ecLevel != null &&
        version != -1 &&
        matrixWidth != -1 &&
        maskPattern != -1 &&
        numTotalBytes != -1 &&
        numDataBytes != -1 &&
        numECBytes != -1 &&
        numRSBlocks != -1 &&
        // Then check them in other ways..
        isValidMaskPattern(maskPattern) &&
        numTotalBytes == numDataBytes + numECBytes &&
        // ByteMatrix stuff.
        matrix != null &&
        matrixWidth == matrix.getWidth() &&
        // See 7.3.1 of JISX0510:2004 (p.5).
        matrix.getWidth() == matrix.getHeight(); // Must be square.
  }

  // Return debug String.
  public String toString() {
    StringBuffer result = new StringBuffer(200);
    result.append("<<\n");
    result.append(" mode: ");
    result.append(mode);
    result.append("\n ecLevel: ");
    result.append(ecLevel);
    result.append("\n version: ");
    result.append(version);
    result.append("\n matrixWidth: ");
    result.append(matrixWidth);
    result.append("\n maskPattern: ");
    result.append(maskPattern);
    result.append("\n numTotalBytes: ");
    result.append(numTotalBytes);
    result.append("\n numDataBytes: ");
    result.append(numDataBytes);
    result.append("\n numECBytes: ");
    result.append(numECBytes);
    result.append("\n numRSBlocks: ");
    result.append(numRSBlocks);
    if (matrix == null) {
      result.append("\n matrix: null\n");
    } else {
      result.append("\n matrix:\n");
      result.append(matrix.toString());
    }
    result.append(">>\n");
    return result.toString();
  }

  public void setMode(Mode value) {
    mode = value;
  }

  public void setECLevel(ErrorCorrectionLevel value) {
    ecLevel = value;
  }

  public void setVersion(int value) {
    version = value;
  }

  public void setMatrixWidth(int value) {
    matrixWidth = value;
  }

  public void setMaskPattern(int value) {
    maskPattern = value;
  }

  public void setNumTotalBytes(int value) {
    numTotalBytes = value;
  }

  public void setNumDataBytes(int value) {
    numDataBytes = value;
  }

  public void setNumECBytes(int value) {
    numECBytes = value;
  }

  public void setNumRSBlocks(int value) {
    numRSBlocks = value;
  }

  // This takes ownership of the 2D array.
  public void setMatrix(ByteMatrix value) {
    matrix = value;
  }

  // Check if "mask_pattern" is valid.
  public static boolean isValidMaskPattern(int maskPattern) {
    return maskPattern >= 0 && maskPattern < NUM_MASK_PATTERNS;
  }

  // Return true if the all values in the matrix are binary numbers.
  //
  // JAVAPORT: This is going to be super expensive and unnecessary, we should not call this in
  // production. I'm leaving it because it may be useful for testing. It should be removed entirely
  // if ByteMatrix is changed never to contain a -1.
  /*
  private static boolean EverythingIsBinary(final ByteMatrix matrix) {
    for (int y = 0; y < matrix.height(); ++y) {
      for (int x = 0; x < matrix.width(); ++x) {
        int value = matrix.get(y, x);
        if (!(value == 0 || value == 1)) {
          // Found non zero/one value.
          return false;
        }
      }
    }
    return true;
  }
   */

}

⏎ com/itextpdf/text/pdf/qrcode/QRCode.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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