Solstice::State::Machine - Representation of a finite state machine for Solstice. See Solstice::State::Tracker to run through a state machine.

use Solstice::State::Machine;

my $machine = new Solstice::State::Machine();

This is the main state machine representation for the Solstice tools. The Solstice::State::Tracker uses this representation to keep track of state. A Solstice::State::Machine's data is stored only once in the main apache thread via Solstice::Service::Memory;

No symbols exported.

new()

Creates a new Solstice::State::Machine object.

returns - a new state machine object.

initialize()

Initializes the state machine using the XML files given.

$xmlFiles - a reference to a hash of XML filenames.

_loadStateFile($xmlFile)

Builds the state graph from the XML file.

$xmlFile - the path to the xml file.

returns - whether successful.

_validateStateXML($xmlDoc)

_fullyQualify($name, [$namespace])

Fully qualifies a state or flow name by prefixing it with the application namespace.

_loadStates($xmlNode)

Given the parsed XML node for the states section of the Xml file, create and store the corresponding State objects.

$xmlNode - the XML node to load from.

_loadTransition($pageflow, $transition_start, $xmlNode)

Loads a single transition from the $xmlNode.

$pageflow - the page flow to add the transition to. $transition_start - the start state of the transition. $xmlNode - the XML to load from.

_loadPageFlowInclude($pageflow, $transition_start, $xmlNode)

Loads a page flow include and adds it to the $pageflow

$pageflow - the page flow to include the page flow include into. $transition_start - the start state of the transition that takes you to the new flow. $xmlNode - the XML node to load from.

_loadFailovers($state, $xmlNode)

Loads the failovers for a given state out of the Xml node.

$pageflow - the pageflow object to put the failovers in. $state - the name of the state to load the failovers for. $xmlNode - the Xml node to load from.

_stateExists($stateName)

$stateName - the name of the state.

returns - whether the state exists in the machine.

_addState($stateName, $controller)

Adds a state to the machine.

$stateName - the name of the state to add. $controller - the controller for the state.

_getState($stateName)

Gets the Solstice::State::Node object by name.

$stateName - the name of the state to return.

returns - the state with the given $stateName.

_addPageFlow($pageflow)

Adds a page flow to the machine.

transition($flow, $state, $action)

Gets the target state given a page flow, an initial state, and a transition action from it.

$flow - the page flow to use. $state - the state name to transition from. $action - the transition to take.

returns - ($do_pop, $new_flow, $new_state)

$do_pop - whether the transition exited a flow. $new_flow - the new flow. $new_state - the new state.

getMainFlow($appNamespace)

Gets the main page flow for the machine.

getStartState($appNamespace)

Gets the start state for an application.

getPageFlow($pageflow_name)

Gets the page flow given the app namespace and its name.

getPageFlows()

Gets a reference to a hash of all the page flows.

_parseXml()

Parses the XML file.

returns - the parsed xml document.

canUseBackButton($flow, $state, $transition)

Returns whether the user should be able to use the back button after this transition.

getBackErrorMessage($flow, $state, $transition)

Returns the error message if a the back button is used and it is not allowed.

requires*($flow, $state, $transition)

Given a state and action from the state, returns whether a: -validation -revert -commit -freshen -update is required.

$flow - the page flow. $state - the start state. $action - the action out of the state.

get*FailoverState*($flow, $state)

Gets the name of the failover state.

getController($state, $application)

Gets the controller for the given state.

$state - the state to get the controller for. $application - the application.

returns - the controller object for the $state.

getControllerName($state)

Gets the name of the controller for the given state.

$state - the state to get the controller name for.

returns - the controller name (string).

_createNode($stateName, $controller)

Creates a new node object.

_createPageFlow($namespace, $pageflow_name, $entrance)

Creates a new page flow object.

_createTransition($action, $transition_final, $on_back, $lifecycle_stages)

Creates a new transition object.

_createFlowTransition($action, $namespace, $flowname, $on_back, $lifecycle_stages)

Creates a new flow transition object.

_getFlowTransitionPackageName()

Returns the package name of the flow transition object.

_toXml()

Returns a string containing the xml serialization of the machine.

Copyright 1998-2007 Office of Learning Technologies, University of Washington

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