com.espertech.esper.filter
Class FilterSpecParamExprNode

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

All Implemented Interfaces:

MetaDefItem, java.io.Serializable

public final class FilterSpecParamExprNode
extends FilterSpecParam

This class represents an arbitrary expression node returning a boolean value as a 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

FilterSpecParamExprNode(FilterSpecLookupable lookupable, FilterOperator filterOperator, ExprNode exprNode, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes, java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes, VariableService variableService, TableService tableService, EventAdapterService eventAdapterService, ConfigurationInformation configurationInformation, java.lang.String statementName, boolean hasSubquery, boolean hasTableAccess)
Ctor.

Method Summary

boolean	equals(java.lang.Object obj)
ExprNode	getExprNode() Returns the expression node of the boolean expression this filter parameter represents.
ExprNodeAdapterBase	getFilterValue(MatchedEventMap matchedEvents, ExprEvaluatorContext exprEvaluatorContext) Return the filter parameter constant to filter for.
java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>>	getTaggedEventTypes() Returns the map of tag/stream names to event types that the filter expressions map use (for patterns)
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

FilterSpecParamExprNode

public FilterSpecParamExprNode(FilterSpecLookupable lookupable,
                               FilterOperator filterOperator,
                               ExprNode exprNode,
                               java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> taggedEventTypes,
                               java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> arrayEventTypes,
                               VariableService variableService,
                               TableService tableService,
                               EventAdapterService eventAdapterService,
                               ConfigurationInformation configurationInformation,
                               java.lang.String statementName,
                               boolean hasSubquery,
                               boolean hasTableAccess)
                        throws java.lang.IllegalArgumentException

Ctor.

Parameters:

lookupable - is the lookup-able

filterOperator - is expected to be the BOOLEAN_EXPR operator

exprNode - represents the boolean expression

taggedEventTypes - is null if the expression doesn't need other streams, or is filled with a ordered list of stream names and types

arrayEventTypes - is a map of name tags and event type per tag for repeat-expressions that generate an array of events

variableService - - provides access to variables

eventAdapterService - for creating event types and event beans

Throws:

java.lang.IllegalArgumentException - for illegal args

Method Detail

getExprNode

public ExprNode getExprNode()

Returns the expression node of the boolean expression this filter parameter represents.

Returns:

expression node

getTaggedEventTypes

public java.util.LinkedHashMap<java.lang.String,Pair<EventType,java.lang.String>> getTaggedEventTypes()

Returns the map of tag/stream names to event types that the filter expressions map use (for patterns)

Returns:

map

getFilterValue

public final ExprNodeAdapterBase getFilterValue(MatchedEventMap matchedEvents,
                                                ExprEvaluatorContext exprEvaluatorContext)

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