Package com.google.zxing.qrcode.decoder

Class FormatInformation

java.lang.Object

com.google.zxing.qrcode.decoder.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:

DataMask, ErrorCorrectionLevel

Field Summary

Fields

Modifier and Type	Field	Description
private byte	dataMask
private ErrorCorrectionLevel	errorCorrectionLevel
private static int[][]	FORMAT_INFO_DECODE_LOOKUP	See ISO 18004:2006, Annex C, Table C.1
private static int	FORMAT_INFO_MASK_QR

Constructor Summary

Constructors

Modifier	Constructor	Description
private	FormatInformation(int formatInfo)

Method Summary

Modifier and Type	Method	Description
(package private) static FormatInformation	decodeFormatInformation(int maskedFormatInfo1, int maskedFormatInfo2)
private static FormatInformation	doDecodeFormatInformation(int maskedFormatInfo1, int maskedFormatInfo2)
boolean	equals(java.lang.Object o)
(package private) byte	getDataMask()
(package private) ErrorCorrectionLevel	getErrorCorrectionLevel()
int	hashCode()
(package private) static int	numBitsDiffering(int a, int b)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

FORMAT_INFO_MASK_QR

private static final int FORMAT_INFO_MASK_QR

See Also:

Constant Field Values

FORMAT_INFO_DECODE_LOOKUP

private static final int[][] FORMAT_INFO_DECODE_LOOKUP

See ISO 18004:2006, Annex C, Table C.1

errorCorrectionLevel

private final ErrorCorrectionLevel errorCorrectionLevel

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)

getErrorCorrectionLevel

ErrorCorrectionLevel getErrorCorrectionLevel()

getDataMask

byte getDataMask()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object