com.espertech.esper.epl.expression.accessagg

Class ExprAggCountMinSketchNode

java.lang.Object

com.espertech.esper.epl.expression.core.ExprNodeBase

com.espertech.esper.epl.expression.baseagg.ExprAggregateNodeBase

com.espertech.esper.epl.expression.accessagg.ExprAggCountMinSketchNode

All Implemented Interfaces:

ExprAggregateAccessMultiValueNode, ExprAggregateNode, ExprEvaluator, ExprEvaluatorEnumeration, ExprNode, ExprValidator, MetaDefItem, Serializable

public class ExprAggCountMinSketchNode
extends ExprAggregateNodeBase
implements ExprAggregateAccessMultiValueNode

Represents the Count-min sketch aggregate function.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.espertech.esper.epl.expression.baseagg.ExprAggregateNodeBase

aggregationResultFuture, column, isDistinct, optionalAggregateLocalGroupByDesc, optionalFilter, positionalParams

Constructor Summary

Constructors

Constructor and Description
ExprAggCountMinSketchNode(boolean distinct, CountMinSketchAggType aggType)

Method Summary

Modifier and Type	Method and Description
boolean	equalsNodeAggregateMethodOnly(ExprAggregateNode node) Return true if a expression aggregate node semantically equals the current node, or false if not.
EventBean	evaluateGetEventBean(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
Collection<EventBean>	evaluateGetROCollectionEvents(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
Collection	evaluateGetROCollectionScalar(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
String	getAggregationFunctionName() Returns the aggregation function name for representation in a generate expression string.
CountMinSketchAggType	getAggType()
Class	getComponentTypeCollection()
ExprValidationException	getDeclaredWrongParameterExpr()
EventType	getEventTypeCollection(EventAdapterService eventAdapterService, int statementId)
EventType	getEventTypeSingle(EventAdapterService eventAdapterService, int statementId)
protected boolean	isExprTextWildcardWhenNoParams()
protected boolean	isFilterExpressionAsLastParameter()
AggregationMethodFactory	validateAggregationChild(ExprValidationContext validationContext) Gives the aggregation node a chance to validate the sub-expression types.
AggregationMethodFactory	validateAggregationParamsWBinding(ExprValidationContext context, TableMetadataColumnAggregation tableAccessColumn)

Methods inherited from class com.espertech.esper.epl.expression.baseagg.ExprAggregateNodeBase

equalsNode, evaluate, getExprEvaluator, getFactory, getOptionalFilter, getOptionalLocalGroupBy, getPositionalParams, getPrecedence, getType, isConstantResult, isDistinct, makeExceptionExpectedParamNum, setAggregationResultFuture, toPrecedenceFreeEPL, validate, validateFilter, validateNumericChildAllowFilter, validatePositionals

Methods inherited from class com.espertech.esper.epl.expression.core.ExprNodeBase

accept, accept, acceptChildnodes, addChildNode, addChildNodes, addChildNodeToFront, getChildNodes, replaceUnlistedChildNode, setChildNode, setChildNodes, toEPL

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.epl.expression.accessagg.ExprAggregateAccessMultiValueNode

validatePositionals

Methods inherited from interface com.espertech.esper.epl.expression.core.ExprNode

accept, accept, acceptChildnodes, addChildNode, addChildNodes, getChildNodes, replaceUnlistedChildNode, setChildNode, setChildNodes, toEPL

Constructor Detail

ExprAggCountMinSketchNode

public ExprAggCountMinSketchNode(boolean distinct,
                                 CountMinSketchAggType aggType)

Method Detail

validateAggregationChild

public AggregationMethodFactory validateAggregationChild(ExprValidationContext validationContext)
                                                  throws ExprValidationException

Description copied from class: ExprAggregateNodeBase

Gives the aggregation node a chance to validate the sub-expression types.

Specified by:

validateAggregationChild in class ExprAggregateNodeBase

Parameters:

validationContext - validation information

Returns:

aggregation function factory to use

Throws:

ExprValidationException - when expression validation failed

validateAggregationParamsWBinding

public AggregationMethodFactory validateAggregationParamsWBinding(ExprValidationContext context,
                                                                  TableMetadataColumnAggregation tableAccessColumn)
                                                           throws ExprValidationException

Specified by:

validateAggregationParamsWBinding in interface ExprAggregateAccessMultiValueNode

Throws:

ExprValidationException

getAggregationFunctionName

public String getAggregationFunctionName()

Description copied from class: ExprAggregateNodeBase

Returns the aggregation function name for representation in a generate expression string.

Specified by:

getAggregationFunctionName in class ExprAggregateNodeBase

Returns:

aggregation function name

equalsNodeAggregateMethodOnly

public final boolean equalsNodeAggregateMethodOnly(ExprAggregateNode node)

Description copied from class: ExprAggregateNodeBase

Return true if a expression aggregate node semantically equals the current node, or false if not.

For use by the equalsNode implementation which compares the distinct flag.

Specified by:

equalsNodeAggregateMethodOnly in class ExprAggregateNodeBase

Parameters:

node - to compare to

Returns:

true if semantically equal, or false if not equals

getAggType

public CountMinSketchAggType getAggType()

getEventTypeCollection

public EventType getEventTypeCollection(EventAdapterService eventAdapterService,
                                        int statementId)
                                 throws ExprValidationException

Specified by:

getEventTypeCollection in interface ExprEvaluatorEnumeration

Throws:

ExprValidationException

evaluateGetROCollectionEvents

public Collection<EventBean> evaluateGetROCollectionEvents(EventBean[] eventsPerStream,
                                                           boolean isNewData,
                                                           ExprEvaluatorContext context)

Specified by:

evaluateGetROCollectionEvents in interface ExprEvaluatorEnumeration

getComponentTypeCollection

public Class getComponentTypeCollection()
                                 throws ExprValidationException

Specified by:

getComponentTypeCollection in interface ExprEvaluatorEnumeration

Throws:

ExprValidationException

evaluateGetROCollectionScalar

public Collection evaluateGetROCollectionScalar(EventBean[] eventsPerStream,
                                                boolean isNewData,
                                                ExprEvaluatorContext context)

Specified by:

evaluateGetROCollectionScalar in interface ExprEvaluatorEnumeration

getEventTypeSingle

public EventType getEventTypeSingle(EventAdapterService eventAdapterService,
                                    int statementId)
                             throws ExprValidationException

Specified by:

getEventTypeSingle in interface ExprEvaluatorEnumeration

Throws:

ExprValidationException

evaluateGetEventBean

public EventBean evaluateGetEventBean(EventBean[] eventsPerStream,
                                      boolean isNewData,
                                      ExprEvaluatorContext context)

Specified by:

evaluateGetEventBean in interface ExprEvaluatorEnumeration

isExprTextWildcardWhenNoParams

protected boolean isExprTextWildcardWhenNoParams()

Overrides:

isExprTextWildcardWhenNoParams in class ExprAggregateNodeBase

getDeclaredWrongParameterExpr

public ExprValidationException getDeclaredWrongParameterExpr()
                                                      throws ExprValidationException

Throws:

ExprValidationException

isFilterExpressionAsLastParameter

protected boolean isFilterExpressionAsLastParameter()

Specified by:

isFilterExpressionAsLastParameter in class ExprAggregateNodeBase