SubtypeCondition (Flink : 2.0-SNAPSHOT API)

java.lang.Object
- org.apache.flink.cep.pattern.conditions.IterativeCondition<T>
- - org.apache.flink.cep.pattern.conditions.SimpleCondition<T>
  - - org.apache.flink.cep.pattern.conditions.SubtypeCondition<T>

Type Parameters:

T - Type of the elements to be filtered

All Implemented Interfaces:

Serializable, FilterFunction<T>, Function
```
@Internal
public class SubtypeCondition<T>
extends SimpleCondition<T>
```
A condition which filters elements of the given type. An element is filtered out iff it is not assignable to the given subtype of T.

See Also:

Serialized Form

- Nested Class Summary
  - Nested classes/interfaces inherited from class org.apache.flink.cep.pattern.conditions.IterativeCondition
    IterativeCondition.Context<T>
- Constructor Summary
  
  Constructors
  Constructor Description
  
  SubtypeCondition(Class<? extends T> subtype)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  boolean filter(T value)
  The filter function that evaluates the predicate.
  - Methods inherited from class org.apache.flink.cep.pattern.conditions.SimpleCondition
    filter, of
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SubtypeCondition
```
public SubtypeCondition(Class<? extends T> subtype)
```
- Method Detail
  - filter
```
public boolean filter(T value)
               throws Exception
```
    Description copied from interface: FilterFunction
    
    The filter function that evaluates the predicate.
    IMPORTANT: The system assumes that the function does not modify the elements on which the predicate is applied. Violating this assumption can lead to incorrect results.
    
    Parameters:
    
    value - The value to be filtered.
    
    Returns:
    
    True for values that should be retained, false for values to be filtered out.
    
    Throws:
    
    Exception - This method may throw exceptions. Throwing an exception will cause the operation to fail and may trigger recovery.