com.espertech.esper.pattern
Class EvalObserverFactoryNode

java.lang.Object
  com.espertech.esper.pattern.EvalNodeFactoryBase
      com.espertech.esper.pattern.EvalObserverFactoryNode

All Implemented Interfaces:

EvalFactoryNode, java.io.Serializable

public class EvalObserverFactoryNode
extends EvalNodeFactoryBase

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

See Also:

Serialized Form

Constructor Summary

protected

EvalObserverFactoryNode(PatternObserverSpec patternObserverSpec) Constructor.

Method Summary

ObserverFactory	getObserverFactory() Returns the observer factory.
PatternObserverSpec	getPatternObserverSpec() Returns the observer object specification to use for instantiating the observer factory and observer.
PatternExpressionPrecedenceEnum	getPrecedence() Returns precendence.
boolean	isFilterChildNonQuitting()
boolean	isObserverStateNodeNonRestarting()
boolean	isStateful()
EvalNode	makeEvalNode(PatternAgentInstanceContext agentInstanceContext, EvalNode parentNode)
void	setObserverFactory(ObserverFactory observerFactory) Supplies the observer factory to the node.
java.lang.String	toPrecedenceFreeEPL()
void	toPrecedenceFreeEPL(java.io.StringWriter writer)
java.lang.String	toString()

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

addChildNode, addChildNodes, getChildNodes, getFactoryNodeId, setFactoryNodeId, toEPL

Methods inherited from class java.lang.Object

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

Constructor Detail

EvalObserverFactoryNode

protected EvalObserverFactoryNode(PatternObserverSpec patternObserverSpec)

Constructor.

Parameters:

patternObserverSpec - is the factory to use to get an observer instance

Method Detail

makeEvalNode

public EvalNode makeEvalNode(PatternAgentInstanceContext agentInstanceContext,
                             EvalNode parentNode)

Specified by:

makeEvalNode in interface EvalFactoryNode

Specified by:

makeEvalNode in class EvalNodeFactoryBase

getPatternObserverSpec

public PatternObserverSpec getPatternObserverSpec()

Returns the observer object specification to use for instantiating the observer factory and observer.

Returns:

observer specification

setObserverFactory

public void setObserverFactory(ObserverFactory observerFactory)

Supplies the observer factory to the node.

Parameters:

observerFactory - is the observer factory

getObserverFactory

public ObserverFactory getObserverFactory()

Returns the observer factory.

Returns:

factory for observer instances

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object

isFilterChildNonQuitting

public boolean isFilterChildNonQuitting()

isStateful

public boolean isStateful()

toPrecedenceFreeEPL

public void toPrecedenceFreeEPL(java.io.StringWriter writer)

Specified by:

toPrecedenceFreeEPL in class EvalNodeFactoryBase

toPrecedenceFreeEPL

public java.lang.String toPrecedenceFreeEPL()

getPrecedence

public PatternExpressionPrecedenceEnum getPrecedence()

Description copied from interface: EvalFactoryNode

Returns precendence.

Returns:

precendence

isObserverStateNodeNonRestarting

public boolean isObserverStateNodeNonRestarting()