com.espertech.esper.filter
Class FilterSpecParamConstant

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

All Implemented Interfaces:

MetaDefItem, java.io.Serializable

public final class FilterSpecParamConstant
extends FilterSpecParam

This class represents a single, constant value filter parameter in an FilterSpecCompiled filter specification.

See Also:

Serialized Form

Field Summary

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

EMPTY_PARAM_ARRAY, lookupable

Constructor Summary

FilterSpecParamConstant(FilterSpecLookupable lookupable, FilterOperator filterOperator, java.lang.Object filterConstant)
Constructor.

Method Summary

boolean	equals(java.lang.Object o)
java.lang.Object	getFilterConstant() Returns the constant value.
java.lang.Object	getFilterValue(MatchedEventMap matchedEvents, ExprEvaluatorContext evaluatorContext) Return the filter parameter constant to filter for.
int	hashCode()
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

FilterSpecParamConstant

public FilterSpecParamConstant(FilterSpecLookupable lookupable,
                               FilterOperator filterOperator,
                               java.lang.Object filterConstant)
                        throws java.lang.IllegalArgumentException

Constructor.

Parameters:

lookupable - is the lookupable

filterOperator - is the type of compare

filterConstant - contains the value to match against the event's property value

Throws:

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

Method Detail

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

getFilterConstant

public java.lang.Object getFilterConstant()

Returns the constant value.

Returns:

constant value

toString

public final java.lang.String toString()

Overrides:

toString in class FilterSpecParam

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class FilterSpecParam

hashCode

public int hashCode()

Overrides:

hashCode in class FilterSpecParam