it.amattioli.workstate.actions
Class NegatedGuard

Show UML class diagram

java.lang.Object
  it.amattioli.workstate.actions.NegatedGuard

All Implemented Interfaces:

Guard

public class NegatedGuard
extends Object
implements Guard

A decorator that negates a guard. The result of the check(AttributeReader, AttributeReader) method on this guard corresponds to the "not" operator applied to the result of the check(AttributeReader, AttributeReader) method on the guard passed to the constructor.

Constructor Summary

NegatedGuard(Guard negatingGuard)
Build a guard that negates the result of the guard passed as parameter.

Method Summary

boolean	check(AttributeReader event, AttributeReader state) Check if the condition is satisfied or not.
boolean	equals(Object o)
Integer	getPriority() The priority of this guard is equals to the priority of the negating guard passed to the constructor
int	hashCode()
boolean	negates(Guard guard) Check if this guard is the negation of the guard passed as the parameter

Methods inherited from class java.lang.Object

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

Constructor Detail

NegatedGuard

public NegatedGuard(Guard negatingGuard)

Build a guard that negates the result of the guard passed as parameter.

Parameters:

negatingGuard - the negating guard

Throws:

NullPointerException - if the negating guard is null

Method Detail

check

public boolean check(AttributeReader event,
                     AttributeReader state)

Description copied from interface: Guard

Check if the condition is satisfied or not. The check can be performed using event parameters and state attributes.

Specified by:

check in interface Guard

Parameters:

event - the event that triggered the transition to which this guard is associated

state - the state that completely contains the transition to which this guard is associated

getPriority

public Integer getPriority()

The priority of this guard is equals to the priority of the negating guard passed to the constructor

Specified by:

getPriority in interface Guard

negates

public boolean negates(Guard guard)

Check if this guard is the negation of the guard passed as the parameter

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object