com.espertech.esper.epl.core
Class SelectExprProcessorHelper

java.lang.Object
  com.espertech.esper.epl.core.SelectExprProcessorHelper

public class SelectExprProcessorHelper
extends java.lang.Object

Processor for select-clause expressions that handles a list of selection items represented by expression nodes. Computes results based on matching events.

Constructor Summary

SelectExprProcessorHelper(java.util.Collection<java.lang.Integer> assignedTypeNumberStack, java.util.List<SelectClauseExprCompiledSpec> selectionList, java.util.List<SelectExprStreamDesc> selectedStreams, InsertIntoDesc insertIntoDesc, EventType optionalInsertIntoOverrideType, boolean isUsingWildcard, StreamTypeService typeService, EventAdapterService eventAdapterService, ValueAddEventService valueAddEventService, SelectExprEventTypeRegistry selectExprEventTypeRegistry, MethodResolutionService methodResolutionService, java.lang.String statementId, java.lang.annotation.Annotation[] annotations, ConfigurationInformation configuration, NamedWindowService namedWindowService, TableService tableService)
Ctor.

Method Summary

SelectExprProcessor

getEvaluator()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SelectExprProcessorHelper

public SelectExprProcessorHelper(java.util.Collection<java.lang.Integer> assignedTypeNumberStack,
                                 java.util.List<SelectClauseExprCompiledSpec> selectionList,
                                 java.util.List<SelectExprStreamDesc> selectedStreams,
                                 InsertIntoDesc insertIntoDesc,
                                 EventType optionalInsertIntoOverrideType,
                                 boolean isUsingWildcard,
                                 StreamTypeService typeService,
                                 EventAdapterService eventAdapterService,
                                 ValueAddEventService valueAddEventService,
                                 SelectExprEventTypeRegistry selectExprEventTypeRegistry,
                                 MethodResolutionService methodResolutionService,
                                 java.lang.String statementId,
                                 java.lang.annotation.Annotation[] annotations,
                                 ConfigurationInformation configuration,
                                 NamedWindowService namedWindowService,
                                 TableService tableService)
                          throws ExprValidationException

Ctor.

Parameters:

selectionList - - list of select-clause items

insertIntoDesc - - descriptor for insert-into clause contains column names overriding select clause names

isUsingWildcard - - true if the wildcard (*) appears in the select clause

typeService - -service for information about streams

eventAdapterService - - service for generating events and handling event types

valueAddEventService - - service that handles update events

selectExprEventTypeRegistry - - service for statement to type registry

methodResolutionService - - for resolving methods

Throws:

ExprValidationException - thrown if any of the expressions don't validate

Method Detail

getEvaluator

public SelectExprProcessor getEvaluator()
                                 throws ExprValidationException

Throws:

ExprValidationException