Java Doc for StateMachine.java in  » Science » Cougaar12_4 » org » cougaar » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.util   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.cougaar.util.StateMachine All known Subclasses:   org.cougaar.util.StackMachine, StateMachine public class StateMachine (Code) A little state machine framework to allow proper sequencing of a set of logical states. Inner Class :abstract public static class State Inner Class :public static class IllegalStateException extends RuntimeException Field Summary final public static  State DONE      final public static  State ERROR      Error state. final public static  State UNINITIALIZED      Default state from which you cannot transit anywhere. Constructor Summary public   StateMachine()      Method Summary protected  void _set(State s)      public synchronized  State add(State s)      Add a State to the machine. public  void addLink(String startTag, String nextTag)      final public synchronized  State getState()      public synchronized  void go()      final public synchronized  boolean isDone()      public synchronized  void reset(State s)      like set, except allows a machine to jump states. final public synchronized  void reset(String k)      public synchronized  void set(State s)      Sets the State of the machine. final public synchronized  void set(String k)      public synchronized  boolean step()      Invoke a single step to see if we should transit out of the current state. public synchronized  void stepUntilDone()      final protected synchronized  void transit(State s)      final protected synchronized  void transit(String k)      protected synchronized  void transit(State oldState, State newState)      Transit from oldState to newState. Field Detail DONE final public static State DONE(Code) Machine is fulfilled - will not progress from this state * ERROR final public static State ERROR(Code) Error state. The Machine will require a reset in order to progress * UNINITIALIZED final public static State UNINITIALIZED(Code) Default state from which you cannot transit anywhere. * Constructor Detail StateMachine public StateMachine()(Code) Method Detail _set protected void _set(State s)(Code) add public synchronized State add(State s)(Code) Add a State to the machine. A state with the same key as an old state will be replaced and the old one returned. addLink public void addLink(String startTag, String nextTag)(Code) Add a direct link between two tags * getState final public synchronized State getState()(Code) Return the current state * go public synchronized void go()(Code) call step repeatedly until the machine doesn't transit * isDone final public synchronized boolean isDone()(Code) reset public synchronized void reset(State s)(Code) like set, except allows a machine to jump states. This is important primarily if you want to reset a machine to the initial state. reset final public synchronized void reset(String k)(Code) set public synchronized void set(State s)(Code) Sets the State of the machine. Use #reset(State) instead if explicitly skipping states or resetting a machine back to start. throws:   IllegalStateException - When entering ERROR or if skipping a state, e.g. if two sets are done in sequence without the opportunity to process the first one. set final public synchronized void set(String k)(Code) step public synchronized boolean step()(Code) Invoke a single step to see if we should transit out of the current state. If the machine is "DONE" then no state will be invoked: perpetual no-op unless the machine is rest. If the machine is in UNINITIALIZED or ERROR state, then an IllegalStateException will be thrown. true IFF the current state invoked a transit method. stepUntilDone public synchronized void stepUntilDone()(Code) Step until getState() returns DONE * transit final protected synchronized void transit(State s)(Code) transit final protected synchronized void transit(String k)(Code) transit protected synchronized void transit(State oldState, State newState)(Code) Transit from oldState to newState. Default implementation merely calls set(newState) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)