List of usage examples for org.apache.commons.scxml.model SCXML getId
public String getId()
From source file:de.dfki.iui.mmds.scxml.engine.impl.SCXMLEngineImpl.java
/** * Instantiate and initialize the underlying executor instance. * /*from w ww . jav a 2s .c o m*/ * @param stateMachine * The state machine * @param topicInfix * @param rootCtx * The root context * @param evaluator * The expression evaluator * @param dispatcher */ private void initialize(final SCXML stateMachine, String idSuffix, final Context rootCtx, final Evaluator evaluator, EventDispatcher dispatcher, final ErrorReporter errorReporter) { engine = new SCXMLExecutor(evaluator, dispatcher, new SimpleErrorReporter()); engine.setStateMachine(stateMachine); engine.setSuperStep(true); engine.setRootContext(rootCtx); engine.addListener(stateMachine, new EntryListener()); engine.registerInvokerClass("scxml", SimpleSCXMLInvoker.class); // engine.registerInvokerClass("grounding", GroundingInvoker.class); // setId(stateMachine.getId()); String topicId = stateMachine.getId() + idSuffix; setId(topicId); EventHandler handler = new EventHandler() { @Override public void handleEvent(Event event) { if (event instanceof SCXMLEventFiredEvent) { // logInfo( "Scxml event 'SCXMLEventFiredEvent' received!" // ); fireEvent(((SCXMLEventFiredEvent) event).getEvent(), null); } } }; serviceRegs.add(SCXMLEngineActivator.registerEventHandler(handler, SCXMLEventFiredEvent.getTopic(topicId))); handlers.add(handler); // One event handler to listen for macro/micro step instructions handler = new EventHandler() { @Override public void handleEvent(Event event) { // logInfo( "Scxml event 'SCXMLMacroMicroStepEvent' received!" // ); engine.setSuperStep(SCXMLMacroMicroStepEvent.isMacroStepEvent(event)); String ev = ((SCXMLMacroMicroStepEvent) event).getEvent(); if (ev == null) { resume(); } else { fireEvent(ev, null); } } }; serviceRegs.add(SCXMLEngineActivator.registerEventHandler(handler, SCXMLMacroMicroStepEvent.getTopic(topicId, SCXMLMacroMicroStepEvent.TOPIC_SUFFIX_MACRO))); serviceRegs.add(SCXMLEngineActivator.registerEventHandler(handler, SCXMLMacroMicroStepEvent.getTopic(topicId, SCXMLMacroMicroStepEvent.TOPIC_SUFFIX_MICRO))); handlers.add(handler); // a handler for the transition cond evaluation/change events handler = new EventHandler() { public Transition findTransition(SCXMLTransitionEvent ev) { String stateId = ev.getStateId(); for (TransitionTarget tt : engine.getCurrentStatus().getAllStates()) { if (tt.getId().equals(stateId)) { try { // the state is found, now take a look at the // transitions return tt.getTransitionsList().get(ev.getTransPos()); } catch (IndexOutOfBoundsException e) { logError(e); } } } return null; } @Override public void handleEvent(Event event) { if (SCXMLTransitionEvent.isEvalTransitionCondEvent(event)) { // logInfo( "Scxml event 'SCXMLTransitionEvent' received!" // ); SCXMLTransitionEvent ev = (SCXMLTransitionEvent) event; Transition t = findTransition(ev); if (t != null) { try { String cond = t.getCond(); boolean evalResult = engine.getEvaluator() .evalCond(engine.getSCInstance().getContext(t.getParent()), cond); // now send the complete current state Map<String, Map<String, List<Object[]>>> currentState = getAvailableEventsStates(); for (Map<String, List<Object[]>> evVal : currentState.values()) { for (List<Object[]> stateVal : evVal.values()) { for (Object[] values : stateVal) { if (values[0] instanceof Integer && values[1].equals(cond)) { // set the evaluation result values[2] = evalResult ? 1 : 0; } } } } // logInfo( "Send 'Active states'" ); SCXMLEngineActivator.sendActiveStates(id, getActiveStates(), getAllActiveStates()); // logInfo( "Send 'Scxml state'" ); SCXMLEngineActivator.sendScxmlState(id, State.IDLE, currentState); } catch (SCXMLExpressionException e) { logError(e); } } } else if (SCXMLChangeTransitionCondEvent.isChangeTransitionCondEvent(event)) { // logInfo( // "Scxml event 'SCXMLChangeTransitionCondEvent' received!" // ); SCXMLChangeTransitionCondEvent ev = (SCXMLChangeTransitionCondEvent) event; Transition t = findTransition(ev); if (t != null) { t.setCond(ev.getNewCond()); } } } }; serviceRegs.add(SCXMLEngineActivator.registerEventHandler(handler, SCXMLTransitionEvent.getTopic(topicId, SCXMLTransitionEvent.Sort.COND))); handlers.add(handler); // a handler for the change of data values handler = new EventHandler() { @Override public void handleEvent(Event event) { if (event instanceof SCXMLChangeDataValueEvent) { // logInfo( // "Scxml event 'SCXMLChangeDataValueEvent' received!" ); SCXMLChangeDataValueEvent ev = (SCXMLChangeDataValueEvent) event; String stateId = ev.getStateId(); for (TransitionTarget tt : engine.getCurrentStatus().getAllStates()) { if (tt.getId().equals(stateId)) { try { // here comes a 'silent' change of the content, // i.e. there is no event 'dataId.change' sent Context ctxt = engine.getSCInstance().getContext(tt); Object result = engine.getEvaluator().eval(ctxt, ev.getValueScript()); String dataId = ev.getDataId(); ctxt.set(dataId, result); // now send the complete current state Map<String, Map<String, List<Object[]>>> currentState = getAvailableEventsStates(); for (Map<String, List<Object[]>> val : currentState.values()) { for (List<Object[]> state : val.values()) { for (Object[] values : state) { if (values[0].equals(dataId)) { // indicate that the value // changed values[2] = true; } } } } // logInfo( "Send 'Active states'" ); SCXMLEngineActivator.sendActiveStates(id, getActiveStates(), getAllActiveStates()); // logInfo( "Send 'Scxml state'" ); SCXMLEngineActivator.sendScxmlState(id, State.IDLE, currentState); return; } catch (SCXMLExpressionException e) { e.printStackTrace(); } } } } } }; serviceRegs.add( SCXMLEngineActivator.registerEventHandler(handler, SCXMLChangeDataValueEvent.getTopic(topicId))); handlers.add(handler); }