Add initial action to repository config

- Now RepositoryState can have initial action
  if it is an initial state.
- Implement all needed tests.
- Fixes #281

spring-statemachine-data/src/main/java/org/springframework/statemachine/data/RepositoryState.java

@@ -62,6 +62,14 @@ public abstract class RepositoryState extends BaseRepositoryEntity {
 	 */
 	public abstract boolean isInitial();
 
+	/**
+	 * Gets the initial action. This is any meaningful if
+	 * state is initial state.
+	 *
+	 * @return the initial action
+	 */
+	public abstract RepositoryAction getInitialAction();
+
 	/**
 	 * Gets the state actions.
 	 *

spring-statemachine-data/src/main/java/org/springframework/statemachine/data/RepositoryStateMachineModelFactory.java

@@ -153,6 +153,18 @@ public class RepositoryStateMachineModelFactory extends AbstractStateMachineMode
 			Object region = s.getRegion();
 			StateData<String, String> stateData = new StateData<String, String>(parentState != null ? parentState.getState() : null, region,
 					s.getState(), s.isInitial());
+			Action<String, String> initialAction = null;
+			if (s.getInitialAction() != null) {
+				if (StringUtils.hasText(s.getInitialAction().getName())) {
+					initialAction = resolveAction(s.getInitialAction().getName());
+				} else if (StringUtils.hasText(s.getInitialAction().getSpel())) {
+					SpelExpressionParser parser = new SpelExpressionParser(
+							new SpelParserConfiguration(SpelCompilerMode.MIXED, null));
+
+					initialAction = new SpelExpressionAction<String, String>(parser.parseExpression(s.getInitialAction().getSpel()));
+				}
+			}
+			stateData.setInitialAction(initialAction);
 			stateData.setStateActions(stateActions);
 			stateData.setEntryActions(entryActions);
 			stateData.setExitActions(exitActions);
@@ -170,7 +182,7 @@ public class RepositoryStateMachineModelFactory extends AbstractStateMachineMode
 				Collection<StateData<String, String>> submachineStateDataOrig = subStateMachineModel.getStatesData().getStateData();
 				for (StateData<String, String> sd : submachineStateDataOrig) {
 					submachineStateData.add(new StateData<String, String>(s.getState(), sd.getRegion(), sd.getState(),
-							sd.getDeferred(), sd.getEntryActions(), sd.getExitActions(), sd.isInitial()));
+							sd.getDeferred(), sd.getEntryActions(), sd.getExitActions(), sd.isInitial(), sd.getInitialAction()));
 				}
 				stateData.setSubmachineStateData(submachineStateData);
 			}

spring-statemachine-data/src/test/java/org/springframework/statemachine/data/AbstractRepositoryTests.java

@@ -412,6 +412,24 @@ public abstract class AbstractRepositoryTests {
 		plan.test();
 	}
 
+	@SuppressWarnings("unchecked")
+	@Test
+	public void testMachine14() throws Exception {
+		context.register(getRegisteredClasses());
+		context.register(Config14.class, FactoryConfig.class);
+		context.refresh();
+		StateMachineFactory<String, String> stateMachineFactory = context.getBean(StateMachineFactory.class);
+		StateMachine<String, String> stateMachine = stateMachineFactory.getStateMachine();
+
+		StateMachineTestPlan<String, String> plan =
+				StateMachineTestPlanBuilder.<String, String>builder()
+					.stateMachine(stateMachine)
+					.step().expectStates("S1").expectVariable("foo", 0).and()
+					.step().sendEvent("E1").expectStates("S2").and()
+					.build();
+		plan.test();
+	}
+
 	@Configuration
 	public static class Config2 {
 
@@ -576,6 +594,17 @@ public abstract class AbstractRepositoryTests {
 		}
 	}
 
+	@Configuration
+	public static class Config14 {
+
+		@Bean
+		public StateMachineJackson2RepositoryPopulatorFactoryBean jackson2RepositoryPopulatorFactoryBean() {
+			StateMachineJackson2RepositoryPopulatorFactoryBean factoryBean = new StateMachineJackson2RepositoryPopulatorFactoryBean();
+			factoryBean.setResources(new Resource[]{new ClassPathResource("data14.json")});
+			return factoryBean;
+		}
+	}
+
 	@Configuration
 	@EnableStateMachineFactory
 	public static class FactoryConfig extends StateMachineConfigurerAdapter<String, String> {