jpel.language
Class UnaryExpression

java.lang.Object
  |
  +--jpel.language.AbstractExpression
        |
        +--jpel.language.AbstractNamedExpression
              |
              +--jpel.language.UnaryExpression

All Implemented Interfaces:

Expression, NamedExpression, java.io.Serializable

Direct Known Subclasses:

ExpressionEcho, ExpressionHead, ExpressionLength, ExpressionNegative, ExpressionNot, ExpressionTail, ExpressionTrim

public abstract class UnaryExpression

extends AbstractNamedExpression

Representa uma expressão que possui apenas um operando.

See Also:

Serialized Form

Constructor Summary

UnaryExpression(java.lang.String unaryOperator, jpel.language.ExpressionType type, jpel.language.Expression expression)

Method Summary

boolean	equivalent(jpel.language.Expression expression) Indica se uma expressão pode ser considerada equivalente à outra.
void	freeVariable(jpel.language.ExpressionList list) Guarda as variáveis livres da expressão em uma lista.
jpel.language.Expression	getExpression()
void	setExpression(jpel.language.Expression expression)
java.lang.String	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, eval, getData, getData, getSource, getType, rebuild, setData, setSource, setType

Constructor Detail

UnaryExpression

public UnaryExpression(java.lang.String unaryOperator,
                       jpel.language.ExpressionType type,
                       jpel.language.Expression expression)

Method Detail

setExpression

public void setExpression(jpel.language.Expression expression)

getExpression

public jpel.language.Expression getExpression()

freeVariable

public void freeVariable(jpel.language.ExpressionList list)

Description copied from interface: Expression

Guarda as variáveis livres da expressão em uma lista.

Parameters:

list - A lista onde as variáveis livres vão ser inseridas.

equivalent

public boolean equivalent(jpel.language.Expression expression)

Description copied from interface: Expression

Indica se uma expressão pode ser considerada equivalente à outra.

Specified by:

equivalent in interface Expression

Overrides:

equivalent in class AbstractExpression

Parameters:

expression - Expressão ao qual se deseja verificar a equivalência.

Returns:

true, caso as expressões possam ser consideradas equivalentes, false, caso contrário.

toString

public java.lang.String toString()

Overrides:

toString in class AbstractExpression