PreserveWatermarks (Flink : Table : Common 2.1.0 API)

java.lang.Object
- org.apache.flink.table.sources.wmstrategies.WatermarkStrategy
- - org.apache.flink.table.sources.wmstrategies.PreserveWatermarks

All Implemented Interfaces:

Serializable, Descriptor
```
@PublicEvolving
public final class PreserveWatermarks
extends WatermarkStrategy
```
A strategy which indicates the watermarks should be preserved from the underlying datastream.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

static PreserveWatermarks INSTANCE

Constructor Summary

Constructors
Constructor Description

PreserveWatermarks()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object obj)`
`int`	`hashCode()`
`Map<String,String>`	`toProperties()`	This method is a default implementation that uses java serialization and it is discouraged.

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

- Field Detail
  - INSTANCE
```
public static final PreserveWatermarks INSTANCE
```
- Constructor Detail
  - PreserveWatermarks
```
public PreserveWatermarks()
```
- Method Detail
  - equals
```
public boolean equals(Object obj)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toProperties
```
public Map<String,String> toProperties()
```
    Description copied from class: WatermarkStrategy
    
    This method is a default implementation that uses java serialization and it is discouraged. All implementation should provide a more specific set of properties.
    
    Specified by:
    
    toProperties in interface Descriptor
    
    Overrides:
    
    toProperties in class WatermarkStrategy