com.google.zxing.pdf417

Class PDF417Reader

java.lang.Object

com.google.zxing.pdf417.PDF417Reader

All Implemented Interfaces:

MultipleBarcodeReader, Reader

public final class PDF417Reader
extends Object
implements Reader, MultipleBarcodeReader

This implementation can detect and decode PDF417 codes in an image.

Author:

Guenther Grau

Constructor Summary

Constructors

Constructor and Description
PDF417Reader()

Method Summary

Methods

Modifier and Type	Method and Description
Result	decode(BinaryBitmap image) Locates and decodes a PDF417 code in an image.
Result	decode(BinaryBitmap image, Map<DecodeHintType,?> hints) Locates and decodes a barcode in some format within an image.
Result[]	decodeMultiple(BinaryBitmap image)
Result[]	decodeMultiple(BinaryBitmap image, Map<DecodeHintType,?> hints)
void	reset() Resets any internal state the implementation has after a decode, to prepare it for reuse.

Methods inherited from class java.lang.Object

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

Constructor Detail

PDF417Reader

public PDF417Reader()

Method Detail

decode

public Result decode(BinaryBitmap image)
              throws NotFoundException,
                     FormatException,
                     ChecksumException

Locates and decodes a PDF417 code in an image.

Specified by:

decode in interface Reader

Parameters:

image - image of barcode to decode

Returns:

a String representing the content encoded by the PDF417 code

Throws:

NotFoundException - if a PDF417 code cannot be found,

FormatException - if a PDF417 cannot be decoded

ChecksumException - if a potential barcode is found but does not pass its checksum

decode

public Result decode(BinaryBitmap image,
            Map<DecodeHintType,?> hints)
              throws NotFoundException,
                     FormatException,
                     ChecksumException

Description copied from interface: Reader

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.

Specified by:

decode in interface Reader

Parameters:

image - image of barcode to decode

hints - passed as a Map from DecodeHintType to arbitrary data. The meaning of the data depends upon the hint type. The implementation may or may not do anything with these hints.

Returns:

String which the barcode encodes

Throws:

NotFoundException - if no potential barcode is found

FormatException - if a potential barcode is found but format is invalid

ChecksumException - if a potential barcode is found but does not pass its checksum

decodeMultiple

public Result[] decodeMultiple(BinaryBitmap image)
                        throws NotFoundException

Specified by:

decodeMultiple in interface MultipleBarcodeReader

Throws:

NotFoundException

decodeMultiple

public Result[] decodeMultiple(BinaryBitmap image,
                      Map<DecodeHintType,?> hints)
                        throws NotFoundException

Specified by:

decodeMultiple in interface MultipleBarcodeReader

Throws:

NotFoundException

reset

public void reset()

Description copied from interface: Reader

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

Specified by:

reset in interface Reader