NullByteKeySelector (Flink : Core 1.20.1-cp1 API)

java.lang.Object
- org.apache.flink.api.java.functions.NullByteKeySelector<T>

Type Parameters:

T - The type of the input element.

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.java.functions.KeySelector<T,Byte>
```
@Internal
public class NullByteKeySelector<T>
extends Object
implements org.apache.flink.api.java.functions.KeySelector<T,Byte>
```
Used as a dummy KeySelector to allow using keyed operators for non-keyed use cases. Essentially, it gives all incoming records the same key, which is a (byte) 0 value.

See Also:

Serialized Form

- Constructor Summary
  
  Constructors
  Constructor Description
  
  NullByteKeySelector()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  Byte getKey(T value)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NullByteKeySelector
```
public NullByteKeySelector()
```
- Method Detail
  - getKey
```
public Byte getKey(T value)
            throws Exception
```
    Specified by:
    
    getKey in interface org.apache.flink.api.java.functions.KeySelector<T,Byte>
    
    Throws:
    
    Exception