com.espertech.esper.epl.expression.funcs

Class ExprCastNodeConstEval

java.lang.Object

com.espertech.esper.epl.expression.funcs.ExprCastNodeConstEval

All Implemented Interfaces:

ExprEvaluator

public class ExprCastNodeConstEval
extends Object
implements ExprEvaluator

Constructor Summary

Constructors

Constructor and Description
ExprCastNodeConstEval(ExprCastNode parent, Object theConstant)

Method Summary

Modifier and Type	Method and Description
Object	evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) Evaluate event tuple and return result.
Class	getType() Returns the type that the node's evaluate method returns an instance of.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprCastNodeConstEval

public ExprCastNodeConstEval(ExprCastNode parent,
                             Object theConstant)

Method Detail

evaluate

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

Description copied from interface: ExprEvaluator

Evaluate event tuple and return result.

Specified by:

evaluate in interface ExprEvaluator

Parameters:

eventsPerStream - - event tuple

isNewData - - indicates whether we are dealing with new data (istream) or old data (rstream)

context - context for expression evaluation

Returns:

evaluation result, a boolean value for OR/AND-type evalution nodes.

getType

public Class getType()

Description copied from interface: ExprEvaluator

Returns the type that the node's evaluate method returns an instance of.

Specified by:

getType in interface ExprEvaluator

Returns:

type returned when evaluated