com.espertech.esper.client.soda

Class ArithmaticExpression

java.lang.Object

com.espertech.esper.client.soda.ExpressionBase

com.espertech.esper.client.soda.ArithmaticExpression

All Implemented Interfaces:

Expression, Serializable

public class ArithmaticExpression
extends ExpressionBase

Arithmatic expression for addition, subtraction, multiplication, division and modulo.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ArithmaticExpression() Ctor.
ArithmaticExpression(Expression left, String operator, Expression right) Ctor.
ArithmaticExpression(String operator) Ctor.

Method Summary

Modifier and Type	Method and Description
ArithmaticExpression	add(Expression expression) Add an expression to include in the computation.
ArithmaticExpression	add(Object object) Add a constant to include in the computation.
ArithmaticExpression	add(String propertyName) Add a property to include in the computation.
String	getOperator() Returns the arithmatic operator.
ExpressionPrecedenceEnum	getPrecedence() Returns precedence.
void	setOperator(String operator) Set operator
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

ArithmaticExpression

public ArithmaticExpression()

Ctor.

ArithmaticExpression

public ArithmaticExpression(String operator)

Ctor.

Parameters:

operator - can be any of '-', '+', '*', '/' or '%' (modulo).

ArithmaticExpression

public ArithmaticExpression(Expression left,
                            String operator,
                            Expression right)

Ctor.

Parameters:

left - the left hand side

operator - can be any of '-', '+', '*', '/' or '%' (modulo).

right - the right hand side

Method Detail

getOperator

public String getOperator()

Returns the arithmatic operator.

Returns:

operator

setOperator

public void setOperator(String operator)

Set operator

Parameters:

operator - new value

add

public ArithmaticExpression add(Object object)

Add a constant to include in the computation.

Parameters:

object - constant to add

Returns:

expression

add

public ArithmaticExpression add(Expression expression)

Add an expression to include in the computation.

Parameters:

expression - to add

Returns:

expression

add

public ArithmaticExpression add(String propertyName)

Add a property to include in the computation.

Parameters:

propertyName - is the name of the property

Returns:

expression

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