WatermarkStrategyOperator (nebulastream-java-client 0.0.86 API)

java.lang.Object
- stream.nebula.operators.Operator
- - stream.nebula.operators.WatermarkStrategyOperator

```
public class WatermarkStrategyOperator
extends Operator
```
Operator class that corresponds to WatermarkAssignerLogicalOperatorNode in the C++ API.
Joins and window do not produce results unless the children contain WatermarkAssignerLogicalOperatorNode. When submitting queries using protobuf, we need to replicate the behavior of the C++ Query API and add these operators. However, they are currently not in the Java query API.

Field Summary
- Fields inherited from class stream.nebula.operators.Operator
  childOperator

Constructor Summary

Constructors
Constructor	Description
`WatermarkStrategyOperator(@NonNull Operator childOperator)`	Create a new operator and set its child.
`WatermarkStrategyOperator(@NonNull Operator childOperator, @Nullable WindowDefinition windowDefinition)`	Create a new operator and set its child.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`WindowDefinition`	`getWindowDefinition()`
`void`	`setWindowDefinition(WindowDefinition windowDefinition)`

Methods inherited from class stream.nebula.operators.Operator
getChildOperator

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

- Constructor Detail
  - WatermarkStrategyOperator
```
public WatermarkStrategyOperator(@NonNull Operator childOperator)
```
    Create a new operator and set its child. This constructor leaves the window definition uninitialized, so it must be set later with setWindowDefinition(stream.nebula.operators.window.WindowDefinition) before the operator is deserialized.
    
    Parameters:
    
    childOperator - The child operator in a singly linked operator chain.
  - WatermarkStrategyOperator
```
public WatermarkStrategyOperator(@NonNull Operator childOperator,
                                 @Nullable WindowDefinition windowDefinition)
```
    Create a new operator and set its child.
    
    Parameters:
    
    childOperator - The child operator in a singly linked operator chain.
    
    windowDefinition - The window definition for the watermark strategy. If it is null, it must be set later with setWindowDefinition(stream.nebula.operators.window.WindowDefinition).
- Method Detail
  - getWindowDefinition
```
public WindowDefinition getWindowDefinition()
```
  - setWindowDefinition
```
public void setWindowDefinition(WindowDefinition windowDefinition)
```