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

Class FirstEverProjectionExpression

java.lang.Object

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

com.espertech.esper.common.client.soda.FirstEverProjectionExpression

All Implemented Interfaces:

Expression, Serializable

public class FirstEverProjectionExpression
extends ExpressionBase

Represents the "firstever" aggregation function.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
FirstEverProjectionExpression()	Ctor.
FirstEverProjectionExpression(boolean isDistinct)	Ctor.
FirstEverProjectionExpression(Expression expression, boolean isDistinct)	Ctor.

Method Summary

Modifier and Type	Method	Description
boolean	getDistinct()	Returns true for distinct.
ExpressionPrecedenceEnum	getPrecedence()	Returns precedence.
boolean	isDistinct()	Returns true for distinct.
void	setDistinct(boolean distinct)	Set to true for distinct.
void	toPrecedenceFreeEPL(StringWriter writer)	Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

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

FirstEverProjectionExpression

public FirstEverProjectionExpression()

Ctor.

FirstEverProjectionExpression

public FirstEverProjectionExpression(boolean isDistinct)

Ctor.

Parameters:

isDistinct - true for distinct

FirstEverProjectionExpression

public FirstEverProjectionExpression(Expression expression,
 boolean isDistinct)

Ctor.

Parameters:

expression - to aggregate

isDistinct - true for distinct

Method Details

getPrecedence

public ExpressionPrecedenceEnum getPrecedence()

Description copied from interface: Expression

Returns precedence.

Returns:

precedence

toPrecedenceFreeEPL

public void toPrecedenceFreeEPL(StringWriter writer)

Description copied from class: ExpressionBase

Renders the expressions and all it's child expression, in full tree depth, as a string in language syntax.

Specified by:

toPrecedenceFreeEPL in class ExpressionBase

Parameters:

writer - is the output to use

isDistinct

public boolean isDistinct()

Returns true for distinct.

Returns:

boolean indicating distinct or not

getDistinct

public boolean getDistinct()

Returns true for distinct.

Returns:

boolean indicating distinct or not

setDistinct

public void setDistinct(boolean distinct)

Set to true for distinct.

Parameters:

distinct - indicating distinct or not