com.espertech.esper.filter
Class FilterSpecParam

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

All Implemented Interfaces:

MetaDefItem, java.io.Serializable

Direct Known Subclasses:

FilterSpecParamConstant, FilterSpecParamContextProp, FilterSpecParamEventProp, FilterSpecParamEventPropIndexed, FilterSpecParamExprNode, FilterSpecParamIn, FilterSpecParamRange

public abstract class FilterSpecParam
extends java.lang.Object
implements MetaDefItem, java.io.Serializable

This class represents one filter parameter in an FilterSpecCompiled filter specification.

Each filerting parameter has an attribute name and operator type.

See Also:

Serialized Form

Field Summary

static FilterSpecParam[]	EMPTY_PARAM_ARRAY
protected FilterSpecLookupable	lookupable The property name of the filter parameter.

Method Summary

boolean	equals(java.lang.Object obj)
FilterOperator	getFilterOperator() Returns the filter operator type.
abstract java.lang.Object	getFilterValue(MatchedEventMap matchedEvents, ExprEvaluatorContext evaluatorContext) Return the filter parameter constant to filter for.
FilterSpecLookupable	getLookupable()
int	hashCode()
static FilterSpecParam[]	toArray(java.util.Collection<FilterSpecParam> coll)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_PARAM_ARRAY

public static final FilterSpecParam[] EMPTY_PARAM_ARRAY

lookupable

protected final FilterSpecLookupable lookupable

The property name of the filter parameter.

Method Detail

getFilterValue

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

Return the filter parameter constant to filter for.

Parameters:

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

Returns:

filter parameter constant's value

getLookupable

public FilterSpecLookupable getLookupable()

getFilterOperator

public FilterOperator getFilterOperator()

Returns the filter operator type.

Returns:

filter operator type

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toArray

public static FilterSpecParam[] toArray(java.util.Collection<FilterSpecParam> coll)