Package com.espertech.esper.common.internal.epl.pattern.every

Class EvalEveryStateSpawnEvaluator

java.lang.Object

com.espertech.esper.common.internal.epl.pattern.every.EvalEveryStateSpawnEvaluator

All Implemented Interfaces:

Evaluator

public final class EvalEveryStateSpawnEvaluator
extends Object
implements Evaluator

This class contains the state of an 'every' operator in the evaluation state tree. EVERY nodes work as a factory for new state subnodes. When a child node of an EVERY node calls the evaluateTrue method on the EVERY node, the EVERY node will call newState on its child node BEFORE it calls evaluateTrue on its parent node. It keeps a reference to the new child in its list. (BEFORE because the root node could call quit on child nodes for stopping all listeners).

Constructor Summary

Constructors

Constructor	Description
EvalEveryStateSpawnEvaluator(String statementName)

Method Summary

Modifier and Type	Method	Description
final void	evaluateFalse(EvalStateNode fromNode, boolean restartable)	Indicate a change in truth value to false.
final void	evaluateTrue(MatchedEventMap matchEvent, EvalStateNode fromNode, boolean isQuitted, EventBean optionalTriggeringEvent)	Indicate a change in truth value to true.
final boolean	isEvaluatedTrue()
boolean	isFilterChildNonQuitting()

Methods inherited from class java.lang.Object

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

Constructor Details

EvalEveryStateSpawnEvaluator

public EvalEveryStateSpawnEvaluator(String statementName)

Method Details

isEvaluatedTrue

public final boolean isEvaluatedTrue()

evaluateTrue

public final void evaluateTrue(MatchedEventMap matchEvent,
 EvalStateNode fromNode,
 boolean isQuitted,
 EventBean optionalTriggeringEvent)

Description copied from interface: Evaluator

Indicate a change in truth value to true.

Specified by:

evaluateTrue in interface Evaluator

Parameters:

matchEvent - is the container for events that caused the change in truth value

fromNode - is the node that indicates the change

isQuitted - is an indication of whether the node continues listenening or stops listening

optionalTriggeringEvent - in case the truth value changed to true in direct response to an event arriving, provides that event

evaluateFalse

public final void evaluateFalse(EvalStateNode fromNode,
 boolean restartable)

Description copied from interface: Evaluator

Indicate a change in truth value to false.

Specified by:

evaluateFalse in interface Evaluator

Parameters:

fromNode - is the node that indicates the change

restartable - whether the evaluator can be restarted

isFilterChildNonQuitting

public boolean isFilterChildNonQuitting()

Specified by:

isFilterChildNonQuitting in interface Evaluator