org.apache.flink.cep.pattern.conditions

Class SubtypeCondition<T>

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 and Description
SubtypeCondition(Class<? extends T> subtype)

Method Summary

Modifier and Type	Method and 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.