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

Class PlugInProjectionExpression

java.lang.Object

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

com.espertech.esper.common.client.soda.PlugInProjectionExpression

All Implemented Interfaces:

Expression, Serializable

public class PlugInProjectionExpression
extends ExpressionBase

Represents a plug-in aggregation function.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
PlugInProjectionExpression()	Ctor.
PlugInProjectionExpression(String functionName, boolean isDistinct)	Ctor.
PlugInProjectionExpression(String functionName, boolean isDistinct, Expression... moreExpressions)	Ctor.

Method Summary

Modifier and Type	Method	Description
String	getFunctionName()	Returns the function name.
ExpressionPrecedenceEnum	getPrecedence()	Returns precedence.
boolean	isDistinct()	Returns true for distinct.
void	setDistinct(boolean distinct)	Set to true for distinct.
void	setFunctionName(String functionName)	Sets the function name.
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

PlugInProjectionExpression

public PlugInProjectionExpression()

Ctor.

PlugInProjectionExpression

public PlugInProjectionExpression(String functionName,
 boolean isDistinct)

Ctor.

Parameters:

functionName - the name of the function

isDistinct - true for distinct

PlugInProjectionExpression

public PlugInProjectionExpression(String functionName,
 boolean isDistinct,
 Expression... moreExpressions)

Ctor.

Parameters:

functionName - the name of the function

isDistinct - true for distinct

moreExpressions - provides aggregated values

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

getFunctionName

public String getFunctionName()

Returns the function name.

Returns:

name of function

setFunctionName

public void setFunctionName(String functionName)

Sets the function name.

Parameters:

functionName - name of function

isDistinct

public boolean isDistinct()

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