Add support for deferred events

- Relates to #262

spring-statemachine-data/jpa/src/main/java/org/springframework/statemachine/data/jpa/JpaRepositoryState.java

@@ -17,6 +17,7 @@ package org.springframework.statemachine.data.jpa;
 
 import java.util.Set;
 
+import javax.persistence.ElementCollection;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
@@ -63,6 +64,9 @@ public class JpaRepositoryState extends RepositoryState {
 	@OneToMany(fetch = FetchType.EAGER)
 	private Set<JpaRepositoryAction> exitActions;
 
+	@ElementCollection(fetch = FetchType.EAGER, targetClass = String.class)
+	private Set<String> deferredEvents;
+
 	/**
 	 * Instantiates a new jpa repository state.
 	 */
@@ -214,10 +218,20 @@ public class JpaRepositoryState extends RepositoryState {
 		this.exitActions = exitActions;
 	}
 
+	@Override
+	public Set<String> getDeferredEvents() {
+		return deferredEvents;
+	}
+
+	public void setDeferredEvents(Set<String> deferredEvents) {
+		this.deferredEvents = deferredEvents;
+	}
+
 	@Override
 	public String toString() {
-		return "JpaRepositoryState [id=" + id + ", machineId=" + machineId + ", parentState=" + parentState + ", state=" + state
-				+ ", initial=" + initial + ", stateActions=" + stateActions + ", entryActions=" + entryActions + ", exitActions="
-				+ exitActions + "]";
+		return "JpaRepositoryState [id=" + id + ", machineId=" + machineId + ", state=" + state + ", region=" + region
+				+ ", initial=" + initial + ", kind=" + kind + ", parentState=" + parentState + ", stateActions="
+				+ stateActions + ", entryActions=" + entryActions + ", exitActions=" + exitActions + ", deferredEvents="
+				+ deferredEvents + "]";
 	}
 }

spring-statemachine-data/jpa/src/test/java/org/springframework/statemachine/data/jpa/JpaRepositoryTests.java

@@ -496,6 +496,25 @@ public class JpaRepositoryTests extends AbstractJpaRepositoryTests {
 		plan.test();
 	}
 
+	@SuppressWarnings("unchecked")
+	@Test
+	public void testMachine12() throws Exception {
+		context.register(Config12.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("READY").and()
+					.step().sendEvent("E3").expectStates("S3").and()
+					.step().sendEvent("E1").expectStates("S3").and()
+					.step().sendEvent("E6").expectStates("S1").and()
+					.build();
+		plan.test();
+	}
+
 	@Test
 	public void testPopulate1() {
 		context.register(Config2.class);
@@ -699,6 +718,17 @@ public class JpaRepositoryTests extends AbstractJpaRepositoryTests {
 		}
 	}
 
+	@EnableAutoConfiguration
+	static class Config12 {
+
+		@Bean
+		public StateMachineJackson2RepositoryPopulatorFactoryBean jackson2RepositoryPopulatorFactoryBean() {
+			StateMachineJackson2RepositoryPopulatorFactoryBean factoryBean = new StateMachineJackson2RepositoryPopulatorFactoryBean();
+			factoryBean.setResources(new Resource[]{new ClassPathResource("data12.json")});
+			return factoryBean;
+		}
+	}
+
 	@Configuration
 	@EnableStateMachineFactory
 	public static class FactoryConfig extends StateMachineConfigurerAdapter<String, String> {

spring-statemachine-data/jpa/src/test/resources/data12.json

@@ -0,0 +1,60 @@
+[
+	{
+		"@id": "1",
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryState",
+		"initial": true,
+		"state": "READY"
+	},
+	{
+		"@id": "2",
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryState",
+		"state": "S1"
+	},
+	{
+		"@id": "3",
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryState",
+		"state": "S2"
+	},
+	{
+		"@id": "4",
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryState",
+		"state": "S3",
+		"deferredEvents": ["E1", "E2"]
+	},
+	{
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryTransition",
+		"source": "1",
+		"target": "2",
+		"event": "E1"
+	},
+	{
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryTransition",
+		"source": "1",
+		"target": "3",
+		"event": "E2"
+	},
+	{
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryTransition",
+		"source": "1",
+		"target": "4",
+		"event": "E3"
+	},
+	{
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryTransition",
+		"source": "4",
+		"target": "2",
+		"event": "E4"
+	},
+	{
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryTransition",
+		"source": "4",
+		"target": "3",
+		"event": "E5"
+	},
+	{
+		"_class": "org.springframework.statemachine.data.jpa.JpaRepositoryTransition",
+		"source": "4",
+		"target": "1",
+		"event": "E6"
+	}
+]

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

@@ -89,4 +89,11 @@ public abstract class RepositoryState extends BaseRepositoryEntity {
 	 * @return the pseudo state kind
 	 */
 	public abstract PseudoStateKind getKind();
+
+	/**
+	 * Gets the deferred events.
+	 *
+	 * @return the deferred events
+	 */
+	public abstract Set<String> getDeferredEvents();
 }

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

@@ -155,6 +155,7 @@ public class RepositoryStateMachineModelFactory extends AbstractStateMachineMode
 					stateData.setEnd(true);
 				}
 			}
+			stateData.setDeferred(s.getDeferredEvents());
 			stateDatas.add(stateData);
 		}
 		StatesData<String, String> statesData = new StatesData<>(stateDatas);