org.apache.flink.cep.pattern.conditions

Class RichNotCondition<T>

java.lang.Object

org.apache.flink.cep.pattern.conditions.IterativeCondition<T>

org.apache.flink.cep.pattern.conditions.RichIterativeCondition<T>

org.apache.flink.cep.pattern.conditions.RichCompositeIterativeCondition<T>

org.apache.flink.cep.pattern.conditions.RichNotCondition<T>

Type Parameters:

T - Type of the element to filter

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction

@Internal
public class RichNotCondition<T>
extends RichCompositeIterativeCondition<T>

A condition which negates the condition it wraps and returns true if the original condition returns false.

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
RichNotCondition(IterativeCondition<T> original)

Method Summary

Modifier and Type	Method and Description
boolean	filter(T value, IterativeCondition.Context<T> ctx) The filter function that evaluates the predicate.

Methods inherited from class org.apache.flink.cep.pattern.conditions.RichCompositeIterativeCondition

close, getNestedConditions, open, setRuntimeContext

Methods inherited from class org.apache.flink.cep.pattern.conditions.RichIterativeCondition

getIterationRuntimeContext, getRuntimeContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RichNotCondition

public RichNotCondition(IterativeCondition<T> original)

Method Detail

filter

public boolean filter(T value,
                      IterativeCondition.Context<T> ctx)
               throws Exception

Description copied from class: IterativeCondition

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.

Specified by:

filter in class IterativeCondition<T>

Parameters:

value - The value to be tested.

ctx - The IterativeCondition.Context used for the evaluation of the function and provides access to the already accepted events in the pattern (see IterativeCondition.Context.getEventsForPattern(String)).

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.