/ 
Class-Workflow-0.11
River stage one • 1 direct dependent • 1 total dependent
/ Class::Workflow::Transition

NAME

Class::Workflow::Transition - A function over an instance.

SYNOPSIS

package MyTransition;
use Moose;
with 'Class::Workflow::Transition';

DESCRIPTION

This is the base role for transition implementations.

every transition object must comply to it's interface, and furthermore must also use the derive_and_accept_instance method to return a derived instance at the end of the operation.

METHODS

derive_and_accept_instance $instance, \%attrs, @args

This method calls $instance->derive with the attrs, and then calls the instance accept_instance on the new instance's state.

%attrs must contain the key state, which should do the role Class::Workflow::State.

@args are passed (along with the derived instance) to "accept_instance" in Class::Workflow::State.

REQUIRED METHODS

apply $insatnce, @args

This method accepts a Class::Workflow::Instance as it's first argument, and is expected to call $self->derive_and_accept_instance( $instance, \%attrs, @args ), with %attrs containing the state that the instance is being transferred to (it doesn't have to be different than the current state).