pluf/workflow

<?php
namespace Pluf\Workflow;

/**
 * The type of transition.
 * According to the UML specification (2.5 b1 pag. 377), state machine transition
 * can be divided into three type.
 *
 * @author Henry.He
 *        
 */
class TransitionType
{

    /**
     * Implies that the Transition, if triggered, occurs without exiting or entering the source State
     * (i.e., it does not cause a state change).
     * This means that the entry or exit condition of the source
     * State will not be invoked. An internal Transition can be taken even if the SateMachine is in one or
     * more Regions nested within the associated State.
     */
    public const INTERNAL = 'INTERNAL';

    /**
     * Implies that the Transition, if triggered, will not exit the composite (source) State, but it
     * will exit and re-enter any state within the composite State that is in the current state configuration.
     */
    public const LOCAL = 'LOCAL';

    /**
     * Implies that the Transition, if triggered, will exit the composite (source) State.
     */
    public const EXTERNAL = 'EXTERNAL';
}