Class FormatInformation

java.lang.Object
com.itextpdf.barcodes.qrcode.FormatInformation
final class FormatInformation extends Object
Encapsulates a QR Code's format information, including the data mask used and error correction level.
See Also:

  • Field Details

    • FORMAT_INFO_MASK_QR

      private static final int FORMAT_INFO_MASK_QR
      See Also:

    • FORMAT_INFO_DECODE_LOOKUP

      private static final int[][] FORMAT_INFO_DECODE_LOOKUP
      See ISO 18004:2006, Annex C, Table C.1

    • BITS_SET_IN_HALF_BYTE

      private static final int[] BITS_SET_IN_HALF_BYTE
      Offset i holds the number of 1 bits in the binary representation of i

    • errorCorrectionLevel

      private final ErrorCorrectionLevel errorCorrectionLevel

    • dataMask

      private final byte dataMask

  • Constructor Details

    • FormatInformation

      private FormatInformation(int formatInfo)

  • Method Details

    • numBitsDiffering

      static int numBitsDiffering(int a, int b)

    • decodeFormatInformation

      static FormatInformation decodeFormatInformation(int maskedFormatInfo1, int maskedFormatInfo2)
      Parameters:
      maskedFormatInfo1 - format info indicator, with mask still applied
      maskedFormatInfo2 - second copy of same info; both are checked at the same time to establish best match
      Returns:
      information about the format it specifies, or null if doesn't seem to match any known pattern

    • doDecodeFormatInformation

      private static FormatInformation doDecodeFormatInformation(int maskedFormatInfo1, int maskedFormatInfo2)

    • getErrorCorrectionLevel

      ErrorCorrectionLevel getErrorCorrectionLevel()

    • getDataMask

      byte getDataMask()
      Returns:
      The datamask in byte-format

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object
      Returns:
      the hashcode of the QR-code format information

    • equals

      public boolean equals(Object o)
      Compares the Format Information of this and o
      Overrides:
      equals in class Object
      Parameters:
      o - object to compare to
      Returns:
      True if o is a FormatInformationObject and the error-correction level and the datamask are equal, false otherwise