HuffmanTreeGroup

java.lang.Object
- com.itextpdf.io.codec.brotli.dec.HuffmanTreeGroup

```
final class HuffmanTreeGroup
extends java.lang.Object
```
Contains a collection of huffman trees with the same alphabet size.

Field Summary

Fields
Modifier and Type	Field	Description
`private int`	`alphabetSize`	The maximal alphabet size in this group.
`(package private) int[]`	`codes`	Storage for Huffman lookup tables.
`(package private) int[]`	`trees`	Offsets of distinct lookup tables in `codes` storage.

Constructor Summary

Constructors
Constructor Description

HuffmanTreeGroup()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) static void`	`decode(HuffmanTreeGroup group, BitReader br)`	Decodes Huffman trees from input stream and constructs lookup tables.
`(package private) static void`	`init(HuffmanTreeGroup group, int alphabetSize, int n)`	Initializes the Huffman tree group.

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

- Field Detail
  - alphabetSize
```
private int alphabetSize
```
    The maximal alphabet size in this group.
  - codes
```
int[] codes
```
    Storage for Huffman lookup tables.
  - trees
```
int[] trees
```
    Offsets of distinct lookup tables in codes storage.
- Constructor Detail
  - HuffmanTreeGroup
```
HuffmanTreeGroup()
```
- Method Detail
  - init
```
static void init(HuffmanTreeGroup group,
                 int alphabetSize,
                 int n)
```
    Initializes the Huffman tree group.
    
    Parameters:
    
    group - POJO to be initialised
    
    alphabetSize - the maximal alphabet size in this group
    
    n - number of Huffman codes
  - decode
```
static void decode(HuffmanTreeGroup group,
                   BitReader br)
```
    Decodes Huffman trees from input stream and constructs lookup tables.
    
    Parameters:
    
    group - target POJO
    
    br - data source