Package com.espertech.esper.common.client.soda

Class FirstProjectionExpression

java.lang.Object

com.espertech.esper.common.client.soda.ExpressionBase

com.espertech.esper.common.client.soda.AccessProjectionExpressionBase

com.espertech.esper.common.client.soda.FirstProjectionExpression

All Implemented Interfaces:

Expression, Serializable

public class FirstProjectionExpression
extends AccessProjectionExpressionBase

Represents the "first" aggregation function.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
FirstProjectionExpression()	Ctor.
FirstProjectionExpression(Expression expression)	Ctor.

Method Summary

Modifier and Type	Method	Description
String	getAggregationFunctionName()	Returns the function name of the aggregation function.

Methods inherited from class com.espertech.esper.common.client.soda.AccessProjectionExpressionBase

getPrecedence, toPrecedenceFreeEPL

Methods inherited from class com.espertech.esper.common.client.soda.ExpressionBase

addChild, getChildren, getTreeObjectName, renderAggregation, setChildren, setTreeObjectName, toEPL, toPrecedenceFreeEPL, toPrecedenceFreeEPL

Methods inherited from class java.lang.Object

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

Constructor Details

FirstProjectionExpression

public FirstProjectionExpression()

Ctor.

FirstProjectionExpression

public FirstProjectionExpression(Expression expression)

Ctor.

Parameters:

expression - to aggregate

Method Details

getAggregationFunctionName

public String getAggregationFunctionName()

Description copied from class: AccessProjectionExpressionBase

Returns the function name of the aggregation function.

Specified by:

getAggregationFunctionName in class AccessProjectionExpressionBase

Returns:

function name