Zlib (EU Digital Covid Certificate - Issuance and Validation - 1.0.2)

java.lang.Object
- se.digg.dgc.encoding.Zlib

```
public class Zlib
extends Object
```
Compression/de-compression support.

Author:

Martin Lindström (martin@idsec.se), Henrik Bengtsson (extern.henrik.bengtsson@digg.se), Henric Norlander (extern.henric.norlander@digg.se)

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static byte[]`	`compress(byte[] data)`	Compresses the supplied data.
`static byte[]`	`decompress(byte[] data, boolean requireCompressed)`	De-compresses the supplied data.
`static boolean`	`isCompressed(byte[] data)`	Predicate that checks if the supplied data is compressed using the ZLIB algorithm.

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

- Method Detail
  - compress
```
public static byte[] compress(byte[] data)
```
    Compresses the supplied data.
    
    Parameters:
    
    data - the data to compress
    
    Returns:
    
    the compressed data
  - decompress
```
public static byte[] decompress(byte[] data,
                                boolean requireCompressed)
                         throws ZipException
```
    De-compresses the supplied data.
    If requireCompressed is true we require the input data to contain a ZLIB header (i.e., be compressed using the ZLIB algorithm). If it is false and a ZipException is caught, the input data is assumed to be un-compressed, and the method will return data.
    
    Parameters:
    
    data - the data to de-compress
    
    requireCompressed - boolean telling whether we require the supplied data to be compressed
    
    Returns:
    
    the de-compressed data
    
    Throws:
    
    ZipException - if requireCompressed is true and an inflate error occurs
  - isCompressed
```
public static boolean isCompressed(byte[] data)
```
    Predicate that checks if the supplied data is compressed using the ZLIB algorithm.
    
    Parameters:
    
    data - the data to check
    
    Returns:
    
    true if the supplied data is compressed and false otherwise