com.espertech.esper.filter
Class FilterSpecParamEventProp

java.lang.Object
  com.espertech.esper.filter.FilterSpecParam
      com.espertech.esper.filter.FilterSpecParamEventProp

All Implemented Interfaces:

MetaDefItem, java.io.Serializable

public final class FilterSpecParamEventProp
extends FilterSpecParam

This class represents a filter parameter containing a reference to another event's property in the event pattern result, for use to describe a filter parameter in a FilterSpecCompiled filter specification.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.espertech.esper.filter.FilterSpecParam

EMPTY_PARAM_ARRAY, lookupable

Constructor Summary

FilterSpecParamEventProp(FilterSpecLookupable lookupable, FilterOperator filterOperator, java.lang.String resultEventAsName, java.lang.String resultEventProperty, boolean isMustCoerce, SimpleNumberCoercer numberCoercer, java.lang.Class coercionType, java.lang.String statementName)
Constructor.

Method Summary

boolean	equals(java.lang.Object obj)
java.lang.Class	getCoercionType() Returns the numeric coercion type.
java.lang.Object	getFilterValue(MatchedEventMap matchedEvents, ExprEvaluatorContext evaluatorContext) Return the filter parameter constant to filter for.
java.lang.String	getResultEventAsName() Returns tag for result event.
java.lang.String	getResultEventProperty() Returns the property of the result event.
int	hashCode()
boolean	isMustCoerce() Returns true if numeric coercion is required, or false if not
java.lang.String	toString()

Methods inherited from class com.espertech.esper.filter.FilterSpecParam

getFilterOperator, getLookupable, toArray

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

FilterSpecParamEventProp

public FilterSpecParamEventProp(FilterSpecLookupable lookupable,
                                FilterOperator filterOperator,
                                java.lang.String resultEventAsName,
                                java.lang.String resultEventProperty,
                                boolean isMustCoerce,
                                SimpleNumberCoercer numberCoercer,
                                java.lang.Class coercionType,
                                java.lang.String statementName)
                         throws java.lang.IllegalArgumentException

Constructor.

Parameters:

lookupable - is the property or function to get a lookup value

filterOperator - is the type of compare

resultEventAsName - is the name of the result event from which to get a property value to compare

resultEventProperty - is the name of the property to get from the named result event

isMustCoerce - indicates on whether numeric coercion must be performed

coercionType - indicates the numeric coercion type to use

numberCoercer - interface to use to perform coercion

Throws:

java.lang.IllegalArgumentException - if an operator was supplied that does not take a single constant value

Method Detail

isMustCoerce

public boolean isMustCoerce()

Returns true if numeric coercion is required, or false if not

Returns:

true to coerce at runtime

getCoercionType

public java.lang.Class getCoercionType()

Returns the numeric coercion type.

Returns:

type to coerce to

getResultEventAsName

public java.lang.String getResultEventAsName()

Returns tag for result event.

Returns:

tag

getResultEventProperty

public java.lang.String getResultEventProperty()

Returns the property of the result event.

Returns:

property name

getFilterValue

public java.lang.Object getFilterValue(MatchedEventMap matchedEvents,
                                       ExprEvaluatorContext evaluatorContext)

Description copied from class: FilterSpecParam

Return the filter parameter constant to filter for.

Specified by:

getFilterValue in class FilterSpecParam

Parameters:

matchedEvents - is the prior results that can be used to determine filter parameters

Returns:

filter parameter constant's value

toString

public final java.lang.String toString()

Overrides:

toString in class FilterSpecParam

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class FilterSpecParam

hashCode

public int hashCode()

Overrides:

hashCode in class FilterSpecParam