Package com.itextpdf.barcodes.qrcode

Class FormatInformation

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

    • Field Detail

      • 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

      • dataMask

        private final byte dataMask

    • Constructor Detail

      • FormatInformation

        private FormatInformation​(int formatInfo)

    • Method Detail

      • 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)

      • getDataMask

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

      • hashCode

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

      • equals

        public boolean equals​(java.lang.Object o)
        Compares the Format Information of this and o
        Overrides:
        equals in class java.lang.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