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

protected EvalObserverFactoryNode

factoryNode

Constructor Summary

EvalObserverNode(PatternAgentInstanceContext context, EvalObserverFactoryNode factoryNode)

Method Summary

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

Returns:

state node containing the truth value state for the operator