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/mongodb/src/main/java/org/springframework/statemachine/data/mongodb/MongoDbRepositoryState.java

@@ -20,6 +20,7 @@ import java.util.Set;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.annotation.Reference;
 import org.springframework.data.mongodb.core.mapping.Document;
+import org.springframework.statemachine.data.RepositoryAction;
 import org.springframework.statemachine.data.RepositoryState;
 import org.springframework.statemachine.state.PseudoStateKind;
 
@@ -49,6 +50,9 @@ public class MongoDbRepositoryState extends RepositoryState {
 	@Reference
 	private MongoDbRepositoryState parentState;
 
+	@Reference
+	private MongoDbRepositoryAction initialAction;
+
 	@Reference
 	private Set<MongoDbRepositoryAction> stateActions;
 
@@ -184,6 +188,15 @@ public class MongoDbRepositoryState extends RepositoryState {
 		this.initial = initial;
 	}
 
+	@Override
+	public RepositoryAction getInitialAction() {
+		return initialAction;
+	}
+
+	public void setInitialAction(MongoDbRepositoryAction initialAction) {
+		this.initialAction = initialAction;
+	}
+
 	@Override
 	public Set<MongoDbRepositoryAction> getStateActions() {
 		return stateActions;

spring-statemachine-data/mongodb/src/test/resources/data14.json

@@ -0,0 +1,27 @@
+[
+	{
+		"@id": "1",
+		"_class": "org.springframework.statemachine.data.mongodb.MongoDbRepositoryAction",
+		"spel": "extendedState.variables.put('foo', 0)"
+	},
+	{
+		"@id": "2",
+		"_class": "org.springframework.statemachine.data.mongodb.MongoDbRepositoryState",
+		"initial": true,
+		"initialAction" : "1",
+		"state": "S1"
+	},
+	{
+		"@id": "3",
+		"_class": "org.springframework.statemachine.data.mongodb.MongoDbRepositoryState",
+		"initial": false,
+		"state": "S2"
+	},
+	{
+		"_class": "org.springframework.statemachine.data.mongodb.MongoDbRepositoryTransition",
+		"source": "2",
+		"target": "3",
+		"event": "E1",
+		"kind": "EXTERNAL"
+	}
+]