com.espertech.esper.epl.core
Class ResultSetProcessorRowPerGroupFactory

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

All Implemented Interfaces:

ResultSetProcessorFactory

public class ResultSetProcessorRowPerGroupFactory
extends java.lang.Object
implements ResultSetProcessorFactory

Result set processor prototype for the fully-grouped case: there is a group-by and all non-aggregation event properties in the select clause are listed in the group by, and there are aggregation functions.

Constructor Summary

ResultSetProcessorRowPerGroupFactory(SelectExprProcessor selectExprProcessor, ExprNode[] groupKeyNodeExpressions, ExprEvaluator[] groupKeyNodes, ExprEvaluator optionalHavingNode, boolean isSelectRStream, boolean isUnidirectional, OutputLimitSpec outputLimitSpec, boolean isSorting, boolean noDataWindowSingleStream, boolean isHistoricalOnly, boolean iterateUnbounded)
Ctor.

Method Summary

ExprEvaluator	getGroupKeyNode()
ExprNode[]	getGroupKeyNodeExpressions()
ExprEvaluator[]	getGroupKeyNodes()
ExprEvaluator	getOptionalHavingNode()
OutputLimitSpec	getOutputLimitSpec()
EventType	getResultEventType() Returns the event type of processed results.
boolean	hasAggregation()
ResultSetProcessor	instantiate(OrderByProcessor orderByProcessor, AggregationService aggregationService, AgentInstanceContext agentInstanceContext)
boolean	isHistoricalOnly()
boolean	isSelectRStream()
boolean	isSorting()
boolean	isUnidirectional()

Methods inherited from class java.lang.Object

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

Constructor Detail

ResultSetProcessorRowPerGroupFactory

public ResultSetProcessorRowPerGroupFactory(SelectExprProcessor selectExprProcessor,
                                            ExprNode[] groupKeyNodeExpressions,
                                            ExprEvaluator[] groupKeyNodes,
                                            ExprEvaluator optionalHavingNode,
                                            boolean isSelectRStream,
                                            boolean isUnidirectional,
                                            OutputLimitSpec outputLimitSpec,
                                            boolean isSorting,
                                            boolean noDataWindowSingleStream,
                                            boolean isHistoricalOnly,
                                            boolean iterateUnbounded)

Ctor.

Parameters:

selectExprProcessor - - for processing the select expression and generting the final output rows

groupKeyNodes - - list of group-by expression nodes needed for building the group-by keys

optionalHavingNode - - expression node representing validated HAVING clause, or null if none given. Aggregation functions in the having node must have been pointed to the AggregationService for evaluation.

isSelectRStream - - true if remove stream events should be generated

isUnidirectional - - true if unidirectional join

Method Detail

instantiate

public ResultSetProcessor instantiate(OrderByProcessor orderByProcessor,
                                      AggregationService aggregationService,
                                      AgentInstanceContext agentInstanceContext)

Specified by:

instantiate in interface ResultSetProcessorFactory

getResultEventType

public EventType getResultEventType()

Description copied from interface: ResultSetProcessorFactory

Returns the event type of processed results.

Specified by:

getResultEventType in interface ResultSetProcessorFactory

Returns:

event type of the resulting events posted by the processor.

hasAggregation

public boolean hasAggregation()

Specified by:

hasAggregation in interface ResultSetProcessorFactory

getGroupKeyNodes

public ExprEvaluator[] getGroupKeyNodes()

getGroupKeyNode

public ExprEvaluator getGroupKeyNode()

getOptionalHavingNode

public ExprEvaluator getOptionalHavingNode()

isSorting

public boolean isSorting()

isSelectRStream

public boolean isSelectRStream()

isUnidirectional

public boolean isUnidirectional()

getOutputLimitSpec

public OutputLimitSpec getOutputLimitSpec()

getGroupKeyNodeExpressions

public ExprNode[] getGroupKeyNodeExpressions()

isHistoricalOnly

public boolean isHistoricalOnly()