jpel.language
Interface ComparableExpression

All Superinterfaces:

Expression, java.io.Serializable

All Known Implementing Classes:

ExpressionBoolean, ExpressionCharacter, ExpressionId, ExpressionListImpl, ExpressionListNumber, ExpressionNumber, ExpressionString

public interface ComparableExpression

extends Expression

Permite que expressões possuam uma relação de ordem. Esta interface é usada na definição das comparações.

Method Summary

int	compareTo(jpel.language.ComparableExpression expression) Indicates a order relation throught instances of the same type.

Methods inherited from interface jpel.language.Expression

createClone, equivalent, eval, freeVariable, getData, getData, getSource, getType, rebuild, setData, setSource, setType

Method Detail

compareTo

public int compareTo(jpel.language.ComparableExpression expression)
              throws BadTypedException

Indicates a order relation throught instances of the same type.

Returns:

-1 if it comes before then the give expression, 0 if is in the same leve, and 1 otherwise.

Throws:

BadTypedException - When a wrong comparation type is passed.