COSFilterASCIIReader (veraPDF Validation 1.22.2 API)

java.lang.Object
- org.verapdf.as.filters.io.COSFilterASCIIReader

```
public class COSFilterASCIIReader
extends Object
```
This is class-helper for decoding ASCII85 and ASCII Hex strings. It reads next required amount of bytes and guarantees that white-space characters will be skipped. It also looks for end of data.

Author:

Sergey Shemyakov

Constructor Summary

Constructors
Constructor Description

COSFilterASCIIReader(ASInputStream stream, boolean isASCIIHex)
Constructor from encoded stream.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`byte[]`	`getNextBytes()`	Method gets next portion of bytes: two for ASCII Hex encoding and five for ASCII85 encoding.

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

- Constructor Detail
  - COSFilterASCIIReader
```
public COSFilterASCIIReader(ASInputStream stream,
                            boolean isASCIIHex)
```
    Constructor from encoded stream.
    
    Parameters:
    
    stream - is ASCII Hex or ASCII85 encoded stream.
    
    isASCIIHex - is true if stream ASCII Hex encoded, false if stream is ASCII85 encoded.
- Method Detail
  - getNextBytes
```
public byte[] getNextBytes()
                    throws IOException
```
    Method gets next portion of bytes: two for ASCII Hex encoding and five for ASCII85 encoding. It ignores all the white-space characters.
    
    Returns:
    
    null if end of stream is reached and next portion of bytes otherwise. If ASCII85 is chosen, method can return less than 5 bytes in case if they are last group of bytes in data string.
    
    Throws:
    
    IOException