UPCEReader class

Implements decoding of the UPC-E format.

This is a great reference for UPC-E information.

@author Sean Owen

Inheritance

• Object
• OneDReader
• UPCEANReader
• UPCEReader

Constructors

UPCEReader()

Properties

barcodeFormat → BarcodeFormat

Get the format of this decoder.

no setter, override

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

checkChecksum(String s) → bool

@param s string of digits to check @return {@link #checkStandardUPCEANChecksum(CharSequence)} @throws FormatException if the string does not contain only digits

override

decode(BinaryBitmap image, [DecodeHint? hints]) → Result

Locates and decodes a barcode in some format within an image. This method also accepts hints, each possibly associated to some data, which may help the implementation decode.

inherited

decodeEnd(BitArray row, int endStart) → List<int>

override

decodeMiddle(BitArray row, List<int> startRange, StringBuilder result) → int

Subclasses override this to decode the portion of a barcode between the start and end guard patterns.

override

decodeRow(int rowNumber, BitArray row, DecodeHint? hints, [List<int>? startGuardRange]) → Result

Like {@link #decodeRow(int, BitArray, Map)}, but allows caller to inform method about where the UPC/EAN start pattern is found. This allows this to be computed once and reused across many implementations.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

reset() → void

Resets any internal state the implementation has after a decode, to prepare it for reuse.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

convertUPCEtoUPCA(String upce) → String

Expands a UPC-E value back into its full, equivalent UPC-A code value.

Constants

numsysAndCheckDigitPatterns → const List<List<int>>

See {@link #L_AND_G_PATTERNS}; these values similarly represent patterns of even-odd parity encodings of digits that imply both the number system (0 or 1) used, and the check digit.