com.espertech.esper.pattern

Class EvalObserverNode

java.lang.Object

com.espertech.esper.pattern.EvalNodeBase

com.espertech.esper.pattern.EvalObserverNode

All Implemented Interfaces:

EvalNode

public class EvalObserverNode
extends EvalNodeBase

This class represents an observer expression in the evaluation tree representing an pattern expression.

Field Summary

Fields

Modifier and Type	Field and Description
protected EvalObserverFactoryNode	factoryNode

Constructor Summary

Constructors

Constructor and Description
EvalObserverNode(PatternAgentInstanceContext context, EvalObserverFactoryNode factoryNode)

Method Summary

Modifier and Type	Method and Description
EvalObserverFactoryNode	getFactoryNode()
EvalStateNode	newState(Evaluator parentNode, EvalStateNodeNumber stateNodeNumber, long stateNodeId) Create the evaluation state node containing the truth value state for each operator in an event expression.

Methods inherited from class com.espertech.esper.pattern.EvalNodeBase

getContext

Methods inherited from class java.lang.Object

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

Field Detail

factoryNode

protected final EvalObserverFactoryNode factoryNode

Constructor Detail

EvalObserverNode

public EvalObserverNode(PatternAgentInstanceContext context,
                        EvalObserverFactoryNode factoryNode)

Method Detail

getFactoryNode

public EvalObserverFactoryNode getFactoryNode()

newState

public EvalStateNode newState(Evaluator parentNode,
                              EvalStateNodeNumber stateNodeNumber,
                              long stateNodeId)

Description copied from class: EvalNodeBase

Create the evaluation state node containing the truth value state for each operator in an event expression.

Specified by:

newState in interface EvalNode

Specified by:

newState in class EvalNodeBase

Parameters:

parentNode - is the parent evaluator node that this node indicates a change in truth value to

stateNodeNumber - node number

stateNodeId - node id

Returns:

state node containing the truth value state for the operator