java.lang.Object
- org.apache.flink.streaming.runtime.watermark.AbstractInternalWatermarkDeclaration<T>

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.watermark.WatermarkDeclaration

Direct Known Subclasses:

InternalBoolWatermarkDeclaration, InternalLongWatermarkDeclaration
```
public abstract class AbstractInternalWatermarkDeclaration<T>
extends Object
implements org.apache.flink.api.common.watermark.WatermarkDeclaration
```
The AbstractInternalWatermarkDeclaration class implements the WatermarkDeclaration interface and provides some internal-oriented methods, such as getting/setting the align flag and creating the WatermarkCombiner.

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`protected org.apache.flink.api.common.watermark.WatermarkCombinationPolicy`	`combinationPolicy`
`protected org.apache.flink.api.common.watermark.WatermarkHandlingStrategy`	`defaultHandlingStrategy`
`protected String`	`identifier`
`protected boolean`	`isAligned`

Constructor Summary

Constructors
Constructor	Description
`AbstractInternalWatermarkDeclaration(String identifier, org.apache.flink.api.common.watermark.WatermarkCombinationPolicy combinationPolicy, org.apache.flink.api.common.watermark.WatermarkHandlingStrategy defaultHandlingStrategy, boolean isAligned)`

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract WatermarkCombiner`	`createWatermarkCombiner(int numberOfInputChannels, Runnable gateResumer)`	Creates a new `WatermarkCombiner` instance.
`static AbstractInternalWatermarkDeclaration<?>`	`from(org.apache.flink.api.common.watermark.WatermarkDeclaration watermarkDeclaration)`	Converts a user-oriented `WatermarkDeclaration` to an internal-oriented `AbstractInternalWatermarkDeclaration`.
`org.apache.flink.api.common.watermark.WatermarkCombinationPolicy`	`getCombinationPolicy()`
`org.apache.flink.api.common.watermark.WatermarkHandlingStrategy`	`getDefaultHandlingStrategy()`
`String`	`getIdentifier()`
`boolean`	`isAligned()`
`abstract org.apache.flink.api.common.watermark.Watermark`	`newWatermark(T val)`	Creates a new `Watermark` with the specified value.

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

Field Detail

identifier
```
protected final String identifier
```

combinationPolicy

protected final org.apache.flink.api.common.watermark.WatermarkCombinationPolicy combinationPolicy

defaultHandlingStrategy

protected final org.apache.flink.api.common.watermark.WatermarkHandlingStrategy defaultHandlingStrategy

isAligned
```
protected final boolean isAligned
```

Constructor Detail

AbstractInternalWatermarkDeclaration

public AbstractInternalWatermarkDeclaration(String identifier,
                                            org.apache.flink.api.common.watermark.WatermarkCombinationPolicy combinationPolicy,
                                            org.apache.flink.api.common.watermark.WatermarkHandlingStrategy defaultHandlingStrategy,
                                            boolean isAligned)

Method Detail

getIdentifier
```
public String getIdentifier()
```
Specified by:

getIdentifier in interface org.apache.flink.api.common.watermark.WatermarkDeclaration

newWatermark

public abstract org.apache.flink.api.common.watermark.Watermark newWatermark(T val)

Creates a new Watermark with the specified value.

getCombinationPolicy

public org.apache.flink.api.common.watermark.WatermarkCombinationPolicy getCombinationPolicy()

getDefaultHandlingStrategy

public org.apache.flink.api.common.watermark.WatermarkHandlingStrategy getDefaultHandlingStrategy()

isAligned
```
public boolean isAligned()
```

createWatermarkCombiner

public abstract WatermarkCombiner createWatermarkCombiner(int numberOfInputChannels,
                                                          Runnable gateResumer)

Creates a new WatermarkCombiner instance.

from

public static AbstractInternalWatermarkDeclaration<?> from(org.apache.flink.api.common.watermark.WatermarkDeclaration watermarkDeclaration)

Converts a user-oriented WatermarkDeclaration to an internal-oriented AbstractInternalWatermarkDeclaration.

Class AbstractInternalWatermarkDeclaration<T>