GenericGF

com.google.zxing.common.reedsolomon

Class GenericGF

java.lang.Object
- com.google.zxing.common.reedsolomon.GenericGF

```
public final class GenericGF
extends Object
```
This class contains utility methods for performing mathematical operations over the Galois Fields. Operations use a given primitive polynomial in calculations.

Throughout this package, elements of the GF are represented as an int for convenience and speed (but at the cost of memory).

Field Summary

Fields

Modifier and Type	Field and Description
`static GenericGF`	`AZTEC_DATA_10`
`static GenericGF`	`AZTEC_DATA_12`
`static GenericGF`	`AZTEC_DATA_6`
`static GenericGF`	`AZTEC_DATA_8`
`static GenericGF`	`AZTEC_PARAM`
`static GenericGF`	`DATA_MATRIX_FIELD_256`
`static GenericGF`	`MAXICODE_FIELD_64`
`static GenericGF`	`QR_CODE_FIELD_256`

Constructor Summary

Constructors

Constructor and Description
`GenericGF(int primitive, int size, int b)` Create a representation of GF(size) using the given primitive polynomial.

Method Summary

All Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`int`	`getGeneratorBase()`
`int`	`getSize()`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - AZTEC_DATA_12
```
public static final GenericGF AZTEC_DATA_12
```
  - AZTEC_DATA_10
```
public static final GenericGF AZTEC_DATA_10
```
  - AZTEC_DATA_6
```
public static final GenericGF AZTEC_DATA_6
```
  - AZTEC_PARAM
```
public static final GenericGF AZTEC_PARAM
```
  - QR_CODE_FIELD_256
```
public static final GenericGF QR_CODE_FIELD_256
```
  - DATA_MATRIX_FIELD_256
```
public static final GenericGF DATA_MATRIX_FIELD_256
```
  - AZTEC_DATA_8
```
public static final GenericGF AZTEC_DATA_8
```
  - MAXICODE_FIELD_64
```
public static final GenericGF MAXICODE_FIELD_64
```
- Constructor Detail
  - GenericGF
```
public GenericGF(int primitive,
                 int size,
                 int b)
```
    Create a representation of GF(size) using the given primitive polynomial.
    
    Parameters:
    
    primitive - irreducible polynomial whose coefficients are represented by the bits of an int, where the least-significant bit represents the constant coefficient
    
    size - the size of the field
    
    b - the factor b in the generator polynomial can be 0- or 1-based (g(x) = (x+a^b)(x+a^(b+1))...(x+a^(b+2t-1))). In most cases it should be 1, but for QR code it is 0.
- Method Detail
  - getSize
```
public int getSize()
```
  - getGeneratorBase
```
public int getGeneratorBase()
```
  - toString
```
public String toString()
```