WatermarkDeclaration (Flink : Core API 2.1.2-cp1 API)

All Superinterfaces:

Serializable

All Known Implementing Classes:

BoolWatermarkDeclaration, LongWatermarkDeclaration
```
@Experimental
public interface WatermarkDeclaration
extends Serializable
```
This class represents the watermark creation and handling policy defined by the user.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  String getIdentifier()
  Returns the unique identifier for this watermark.

- Method Detail
  - getIdentifier
```
String getIdentifier()
```
    Returns the unique identifier for this watermark.
    
    Returns:
    
    a String representing the unique identifier of the watermark