Package org.apache.flink.cep.pattern.conditions

Class RichAndCondition<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.RichAndCondition<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 RichAndCondition<T>
extends RichCompositeIterativeCondition<T>

A condition which combines two conditions with a logical AND and returns true if both are true.

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
RichAndCondition(IterativeCondition<T> left, IterativeCondition<T> right)

Method Summary

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

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 Details

RichAndCondition

public RichAndCondition(IterativeCondition<T> left,
 IterativeCondition<T> right)

Method Details

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.

getLeft

public IterativeCondition<T> getLeft()

Returns:

One of the conditions combined in this condition.

getRight

public IterativeCondition<T> getRight()

Returns:

One of the conditions combined in this condition.