com.espertech.esper.epl.core
Class BindProcessor

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

public class BindProcessor
extends java.lang.Object

Works in conjunction with SelectExprResultProcessor to present a result as an object array for 'natural' delivery.

Constructor Summary

BindProcessor(SelectClauseElementCompiled[] selectionList, EventType[] typesPerStream, java.lang.String[] streamNames, TableService tableService)
Ctor.

Method Summary

java.lang.String[]	getColumnNamesAssigned() Returns the column names of select-clause expressions.
java.lang.Class[]	getExpressionTypes() Returns the expression types generated by the select-clause expressions.
java.lang.Object[]	process(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) Process select expressions into columns for native dispatch.

Methods inherited from class java.lang.Object

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

Constructor Detail

BindProcessor

public BindProcessor(SelectClauseElementCompiled[] selectionList,
                     EventType[] typesPerStream,
                     java.lang.String[] streamNames,
                     TableService tableService)
              throws ExprValidationException

Ctor.

Parameters:

selectionList - the select clause

typesPerStream - the event types per stream

streamNames - the stream names

Throws:

ExprValidationException - when the validation of the select clause failed

Method Detail

process

public java.lang.Object[] process(EventBean[] eventsPerStream,
                                  boolean isNewData,
                                  ExprEvaluatorContext exprEvaluatorContext)

Process select expressions into columns for native dispatch.

Parameters:

eventsPerStream - each stream's events

isNewData - true for new events

exprEvaluatorContext - context for expression evaluatiom

Returns:

object array with select-clause results

getExpressionTypes

public java.lang.Class[] getExpressionTypes()

Returns the expression types generated by the select-clause expressions.

Returns:

types

getColumnNamesAssigned

public java.lang.String[] getColumnNamesAssigned()

Returns the column names of select-clause expressions.

Returns:

column names