ExtraField.SubField

java.lang.Object
- org.apache.commons.compress.compressors.gzip.ExtraField.SubField

Enclosing class:

ExtraField
```
public static final 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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(java.lang.Object obj)`
`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.
`int`	`hashCode()`

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

- Method Detail
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Overrides:
    
    equals in class java.lang.Object
  - 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.
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object