com.espertech.esper.epl.property

Class PropertyEvaluatorNested

java.lang.Object

com.espertech.esper.epl.property.PropertyEvaluatorNested

All Implemented Interfaces:

PropertyEvaluator

public class PropertyEvaluatorNested
extends Object
implements PropertyEvaluator

A property evaluator that considers nested properties and that considers where-clauses but does not consider select-clauses.

Constructor Summary

Constructors

Constructor and Description
PropertyEvaluatorNested(ContainedEventEval[] containedEventEvals, FragmentEventType[] fragmentEventType, ExprEvaluator[] whereClauses, List<String> expressionTexts) Ctor.

Method Summary

Modifier and Type	Method and Description
boolean	compareTo(PropertyEvaluator otherEval) Compare to another property evaluator.
EventType	getFragmentEventType() Returns the result type of the events generated by evaluating a property expression.
EventBean[]	getProperty(EventBean theEvent, ExprEvaluatorContext exprEvaluatorContext) Returns the result events based on property values, or null if none found.

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyEvaluatorNested

public PropertyEvaluatorNested(ContainedEventEval[] containedEventEvals,
                               FragmentEventType[] fragmentEventType,
                               ExprEvaluator[] whereClauses,
                               List<String> expressionTexts)

Ctor.

Parameters:

containedEventEvals - property getters or other evaluators

fragmentEventType - the fragments

whereClauses - the where clauses

expressionTexts - the property names that are staggered

Method Detail

getProperty

public EventBean[] getProperty(EventBean theEvent,
                               ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: PropertyEvaluator

Returns the result events based on property values, or null if none found.

Specified by:

getProperty in interface PropertyEvaluator

Parameters:

theEvent - to inspect

exprEvaluatorContext - expression evaluation context

Returns:

events representing property(s)

getFragmentEventType

public EventType getFragmentEventType()

Description copied from interface: PropertyEvaluator

Returns the result type of the events generated by evaluating a property expression.

Specified by:

getFragmentEventType in interface PropertyEvaluator

Returns:

result event type

compareTo

public boolean compareTo(PropertyEvaluator otherEval)

Description copied from interface: PropertyEvaluator

Compare to another property evaluator.

Specified by:

compareTo in interface PropertyEvaluator

Parameters:

otherEval - other

Returns:

equals or not