jpel.language.operators
Class ExpressionSubtract

java.lang.Object
  |
  +--jpel.language.AbstractExpression
        |
        +--jpel.language.AbstractNamedExpression
              |
              +--jpel.language.BinaryExpression
                    |
                    +--jpel.language.operators.ExpressionSubtract

All Implemented Interfaces:

Expression, NamedExpression, java.io.Serializable

public class ExpressionSubtract

extends BinaryExpression

Operação de subtração entre numeros.

See Also:

Serialized Form

Constructor Summary

ExpressionSubtract(jpel.language.Expression left, jpel.language.Expression right)

ExpressionSubtract(java.lang.String identity, jpel.language.Expression left, jpel.language.Expression right)

Method Summary

jpel.language.Expression	eval(jpel.language.Environment environment) Executa uma expressão de acordo com o ambiente definido.
jpel.language.Expression	rebuild(jpel.language.MapReplace map) Permite que sub-expressões sejam substibuídas por outras, de acordo com o mapeamento dado.

Methods inherited from class jpel.language.BinaryExpression

equivalent, freeVariable, getLeftExpression, getRightExpression, setLeftExpression, setRightExpression, toString

Methods inherited from class jpel.language.AbstractNamedExpression

getName, setName

Methods inherited from class jpel.language.AbstractExpression

createClone, getData, getData, getSource, getType, setData, setSource, setType

Methods inherited from class java.lang.Object

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

Methods inherited from interface jpel.language.Expression

createClone, getData, getData, getSource, getType, setData, setSource, setType

Constructor Detail

ExpressionSubtract

public ExpressionSubtract(jpel.language.Expression left,
                          jpel.language.Expression right)

ExpressionSubtract

public ExpressionSubtract(java.lang.String identity,
                          jpel.language.Expression left,
                          jpel.language.Expression right)

Method Detail

eval

public jpel.language.Expression eval(jpel.language.Environment environment)
                              throws ExecutionException

Description copied from interface: Expression

Executa uma expressão de acordo com o ambiente definido.

Parameters:

environment - Ambiente no qual a expressão deve ser executada.

Returns:

A expressão avaliada.

Throws:

ExecutionException - Quando os tipos necessários para a correta avaliação da expressão não são respeitados.

rebuild

public jpel.language.Expression rebuild(jpel.language.MapReplace map)

Description copied from interface: Expression

Permite que sub-expressões sejam substibuídas por outras, de acordo com o mapeamento dado.

Parameters:

map - O mapeamento que guarda as substituições.

Returns:

Uma nova expressão com as devidas substituições.