Examples of org.springframework.webflow.engine.Transition

Package org.springframework.webflow.engine

Examples of org.springframework.webflow.engine.Transition

org.springframework.webflow.engine.Transition
A path from one {@link TransitionableState state} to another {@link State state}.
When executed a transition takes a flow execution from its current state, called the source state, to another state, called the target state. A transition may become eligible for execution on the occurrence of an {@link Event} from within a transitionable source state.
When an event occurs within this transition's source TransitionableState the determination of the eligibility of this transition is made by a TransitionCriteria object called the matching criteria. If the matching criteria returns true this transition is marked eligible for execution for that event.
Determination as to whether an eligible transition should be allowed to execute is made by a TransitionCriteria object called the execution criteria. If the execution criteria test fails this transition will roll back and reenter its source state. If the execution criteria test succeeds this transition will execute and take the flow to the transition's target state.
The target state of this transition is typically specified at configuration time in a static manner. If the target state of this transition needs to be calculated in a dynamic fashion at runtime configure a {@link TargetStateResolver} that supports such calculations. @see TransitionableState @see TransitionCriteria @see TargetStateResolver @author Keith Donald @author Erwin Vervaet

  }


  public void testTransitionExecutingWithSecurity() {
    SecurityFlowExecutionListener listener = new SecurityFlowExecutionListener();
    RequestContext context = new MockRequestContext();
    Transition transition = new Transition(new DefaultTargetStateResolver("target"));
    SecurityRule rule = getSecurityRuleAnyAuthorized();
    transition.getAttributes().put(SecurityRule.SECURITY_ATTRIBUTE_NAME, rule);
    configureSecurityContext();
    listener.transitionExecuting(context, transition);
  }

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    ViewState state = new ViewState(flow, "view", new StubViewFactory()) {
      public void resume(RequestControlContext context) {
        context.execute(getRequiredTransition(context));
      }
    };
    state.getTransitionSet().add(new Transition(new DefaultTargetStateResolver("finish")));
    new EndState(flow, "finish");
    MockFlowExecutionListener mockListener = new MockFlowExecutionListener();
    FlowExecutionListener[] listeners = new FlowExecutionListener[] { mockListener };
    FlowExecutionImpl execution = new FlowExecutionImpl(flow);
    execution.setListeners(listeners);

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    assertTrue(validator.hints.length > 0);
    assertEquals(Model.State1.class, validator.hints[0]);
  }


  public void testSmartValidatorWithHintOnTransition() {
    Transition transition = new Transition();
    transition.setMatchingCriteria(new DefaultTransitionCriteria(new StaticExpression(eventId)));
    transition.getAttributes().put("validationHints", new StaticExpression("State1"));


    ViewState state = new ViewState(requestContext.getRootFlow(), "state2", new StubViewFactory());
    state.getTransitionSet().add(transition);
    requestContext.setCurrentState(state);

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  FlowExecutionImplFactory executionFactory = new FlowExecutionImplFactory();


  protected void setUp() throws Exception {
    flow = new Flow("myFlow");
    ViewState s1 = new ViewState(flow, "state", new StubViewFactory());
    s1.getTransitionSet().add(new Transition(new DefaultTargetStateResolver("state2")));
    new ViewState(flow, "state2", new StubViewFactory());


    conversationManager = new StubConversationManager();
    FlowDefinitionLocator locator = new FlowDefinitionLocator() {
      public FlowDefinition getFlowDefinition(String flowId) throws NoSuchFlowDefinitionException,

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    factoryBean.setFlowDefinitionLocator(new FlowDefinitionLocator() {
      public FlowDefinition getFlowDefinition(String id) throws NoSuchFlowDefinitionException,
          FlowDefinitionConstructionException {
        Flow flow = new Flow(id);
        ViewState view = new ViewState(flow, "view", new StubViewFactory());
        view.getTransitionSet().add(new Transition(new DefaultTargetStateResolver("end")));
        new EndState(flow, "end");
        return flow;
      }
    });
    factoryBean.afterPropertiesSet();

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    factoryBean.setFlowDefinitionLocator(new FlowDefinitionLocator() {
      public FlowDefinition getFlowDefinition(String id) throws NoSuchFlowDefinitionException,
          FlowDefinitionConstructionException {
        Flow flow = new Flow(id);
        ViewState view = new ViewState(flow, "view", new StubViewFactory());
        view.getTransitionSet().add(new Transition(new DefaultTargetStateResolver("end")));
        new EndState(flow, "end");
        return flow;
      }
    });
    Set<FlowElementAttribute> attributes = new HashSet<FlowElementAttribute>();

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   * construction; may be null
   * @return the fully initialized transition instance
   */
  public Transition createTransition(TargetStateResolver targetStateResolver, TransitionCriteria matchingCriteria,
      TransitionCriteria executionCriteria, AttributeMap<?> attributes) {
    Transition transition = new Transition(targetStateResolver);
    if (matchingCriteria != null) {
      transition.setMatchingCriteria(matchingCriteria);
    }
    if (executionCriteria != null) {
      transition.setExecutionCriteria(executionCriteria);
    }
    transition.getAttributes().putAll(attributes);
    return transition;
  }

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      return new Transition[0];
    }
  }


  private Transition[] parseIf(IfModel ifModel) {
    Transition thenTransition = parseThen(ifModel);
    if (StringUtils.hasText(ifModel.getElse())) {
      Transition elseTransition = parseElse(ifModel);
      return new Transition[] { thenTransition, elseTransition };
    } else {
      return new Transition[] { thenTransition };
    }
  }

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    if (logger.isDebugEnabled()) {
      logger.debug("Handling flow execution exception " + exception, exception);
    }
    exposeException(context, exception, findRootCause(exception));
    actionList.execute(context);
    context.execute(new Transition(getTargetStateResolver(exception)));
  }

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