org.codehaus.aspectwerkz.expression
Class Undeterministic

java.lang.Object
  org.codehaus.aspectwerkz.expression.Undeterministic

public abstract class Undeterministic
extends Object

Helper class to have boolean operation on true / false and null, null is assumed to be undetermined, and "not null"="null" A "false && null" will stay false, but a "true && null" will become undetermined (null).

This is used when the expression cannot be resolved entirely (early matching, cflow, runtime check residuals)

Author:

Alexandre Vasseur

Constructor Summary

Undeterministic()

Method Summary

static Boolean	and(Boolean lhs, Boolean rhs) And operation
static Boolean	not(Boolean b) Not operation
static Boolean	or(Boolean lhs, Boolean rhs) Or operation

Methods inherited from class java.lang.Object

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

Constructor Detail

Undeterministic

public Undeterministic()

Method Detail

and

public static Boolean and(Boolean lhs,
                          Boolean rhs)

And operation

Parameters:

lhs -

rhs -

Returns:

or

public static Boolean or(Boolean lhs,
                         Boolean rhs)

Or operation

Parameters:

lhs -

rhs -

Returns:

not

public static Boolean not(Boolean b)

Not operation

Parameters:

b -

Returns: