ExtraField.SubField

java.lang.Object
- kala.compress.compressors.gzip.ExtraField.SubField

Enclosing class:

ExtraField
```
public static class ExtraField.SubField
extends java.lang.Object
```
If the FLG.FEXTRA bit is set, an "extra field" is present in the header, with total length XLEN bytes. It consists of a series of subfields, each of the form:
```
 +---+---+---+---+==================================+
 |SI1|SI2|  LEN  |... LEN bytes of subfield data ...|
 +---+---+---+---+==================================+
 
```
The reserved IDs are:
```
 SI1         SI2         Data
 ----------  ----------  ----
 0x41 ('A')  0x70 ('P')  Apollo file type information
 
```
Subfield IDs with SI2 = 0 are reserved for future use.

LEN gives the length of the subfield data, excluding the 4 initial bytes.
See Also:

RFC 1952 GZIP File Format Specification

Field Summary

Fields
Modifier and Type Field Description

private byte[] payload

private byte si1

private byte si2

Constructor Summary

Constructors
Constructor Description

SubField(byte si1, byte si2, byte[] payload)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`getId()`	The 2 character ISO-8859-1 string made from the si1 and si2 bytes of the sub field id.
`byte[]`	`getPayload()`	The subfield payload.

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

- Field Detail
  - si1
```
private final byte si1
```
  - si2
```
private final byte si2
```
  - payload
```
private final byte[] payload
```
- Constructor Detail
  - SubField
```
SubField(byte si1,
         byte si2,
         byte[] payload)
```
- Method Detail
  - getId
```
public java.lang.String getId()
```
    The 2 character ISO-8859-1 string made from the si1 and si2 bytes of the sub field id.
    
    Returns:
    
    Two character ID.
  - getPayload
```
public byte[] getPayload()
```
    The subfield payload.
    
    Returns:
    
    The payload.