com.espertech.esper.client.soda

Class LambdaExpression

java.lang.Object

com.espertech.esper.client.soda.ExpressionBase

com.espertech.esper.client.soda.LambdaExpression

All Implemented Interfaces:

Expression, Serializable

public class LambdaExpression
extends ExpressionBase

Lambda-expression is an expression of the form "parameter => body" where-in the "=>" reads as goes-to.

The form "x => x * x" reads as "x goes to x times x", for an example expression that yields x multiplied by x.

Used with expression declaration and with enumeration methods, for example, to parameterize by an expression.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LambdaExpression() Ctor.
LambdaExpression(List<String> parameters) Ctor.

Method Summary

Modifier and Type	Method and Description
List<String>	getParameters() Returns the lambda expression parameters.
ExpressionPrecedenceEnum	getPrecedence() Returns precedence.
void	setParameters(List<String> parameters) Sets the lambda expression parameters.
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.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 Detail

LambdaExpression

public LambdaExpression()

Ctor.

LambdaExpression

public LambdaExpression(List<String> parameters)

Ctor.

Parameters:

parameters - the lambda expression parameters

Method Detail

getParameters

public List<String> getParameters()

Returns the lambda expression parameters.

Returns:

lambda expression parameters

setParameters

public void setParameters(List<String> parameters)

Sets the lambda expression parameters.

Parameters:

parameters - lambda expression parameters

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