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© 2005 BEA Systems, Inc. | |||||||||
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java.lang.Objectcom.beasys.commerce.ebusiness.order.StateMachine
A class for implementing finite state machines. The
state machine is created by parsing an XML document,
classes\orderstatus.xml.
The state machine helps get valid transitions based
on a current transition, so that an Order Status
can be moved to a valid new state.
Constructor Summary | |
StateMachine(String domDocFile)
Constructor that takes as a parameter the name of an XML specification for the state machine. |
Method Summary | |
String |
getFirstState()
Gets the first state an order can be set to, which should correspond to a SUBMITTED state. |
String |
getNextStateName(String currStateName,
String event)
Gets the state that results from sending a specified event to a specified state. |
String[] |
getValidEvents(String stateName)
Gets the names of the events associated with transitions that lead from a specified state |
String |
handleEvent(Object targetObject,
String currStateName,
String event)
Handles an event for a given object, in particular invokes the onExitMethod, onEntryMethod, and doMethod if they exists |
static void |
main(String[] argv)
A testing 'main' that uses the classes\orderstatus.xml and show a tree of the possible transitions |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public StateMachine(String domDocFile) throws Exception
Exception
Method Detail |
public String getFirstState() throws StateTransitionException
StateTransitionException
public String getNextStateName(String currStateName, String event) throws StateTransitionException
currStateName
- The name of the current stateevent
- The event to be sent to the current state
StateTransitionException
public String[] getValidEvents(String stateName)
public String handleEvent(Object targetObject, String currStateName, String event) throws StateTransitionException
StateTransitionException
public static void main(String[] argv)
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