com.espertech.esper.epl.property

Class PropertyEvaluatorSimple

java.lang.Object

com.espertech.esper.epl.property.PropertyEvaluatorSimple

All Implemented Interfaces:

PropertyEvaluator

public class PropertyEvaluatorSimple
extends Object
implements PropertyEvaluator

Property evaluator that considers only level one and considers a where-clause, but does not consider a select clause or N-level.

Constructor Summary

Constructors

Constructor and Description
PropertyEvaluatorSimple(ContainedEventEval containedEventEval, FragmentEventType fragmentEventType, ExprEvaluator filter, String expressionText) Ctor.

Method Summary

Modifier and Type	Method and Description
boolean	compareTo(PropertyEvaluator otherEval) Compare to another property evaluator.
String	getExpressionText() Returns the property name.
ExprEvaluator	getFilter() Returns the filter.
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

PropertyEvaluatorSimple

public PropertyEvaluatorSimple(ContainedEventEval containedEventEval,
                               FragmentEventType fragmentEventType,
                               ExprEvaluator filter,
                               String expressionText)

Ctor.

Parameters:

containedEventEval - property getter or other evaluator

fragmentEventType - property event type

filter - optional where-clause expression

expressionText - the property name

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

getExpressionText

public String getExpressionText()

Returns the property name.

Returns:

property name

getFilter

public ExprEvaluator getFilter()

Returns the filter.

Returns:

filter

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