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 testTransitionExecutingNoSecurity() {
    SecurityFlowExecutionListener listener = new SecurityFlowExecutionListener();
    RequestContext context = new MockRequestContext();
    Transition transition = new Transition(new DefaultTargetStateResolver("target"));
    listener.transitionExecuting(context, transition);
  }

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  }


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

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    state = new TransitionableState(flow, "state1") {
      protected void doEnter(RequestControlContext context) {
        throw new FlowExecutionException(getFlow().getId(), getId(), "Oops!", new TestException());
      }
    };
    state.getTransitionSet().add(new Transition(toState("end")));
  }

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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")));
    EndState end = 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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  public void testStatic() throws Exception {
    String expression = "mockState";
    TargetStateResolver resolver = (TargetStateResolver) converter.convertSourceToTargetClass(expression,
        TargetStateResolver.class);
    MockRequestContext context = new MockRequestContext();
    Transition transition = new Transition();
    assertEquals("mockState", resolver.resolveTargetState(transition, null, context).getId());
  }

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    String expression = "${flowScope.lastState}";
    TargetStateResolver resolver = (TargetStateResolver) converter.convertSourceToTargetClass(expression,
        TargetStateResolver.class);
    MockRequestContext context = new MockRequestContext();
    context.getFlowScope().put("lastState", "mockState");
    Transition transition = new Transition();
    assertEquals("mockState", resolver.resolveTargetState(transition, null, context).getId());
  }

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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 attributes = new HashSet();

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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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        final Flow flow = new Flow(id);
        final ActionState state1 = new ActionState(flow, "state1-action");
        final ViewState state2 = new ViewState(flow, "state2-view", new MockViewFactory("view"));
        new EndState(flow, "state3-end");
        state1.getActionList().add(new MockAction("state1-result"));
        state1.getTransitionSet().add(new Transition(new DefaultTargetStateResolver("state2-view")));
        state2.getTransitionSet().add(new Transition(new DefaultTargetStateResolver("state3-end")));
        return flow;
    }

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