Added xml support for event listener and made minor cleanup

spring-data-mongodb/src/main/java/org/baeldung/config/MongoConfig.java

@@ -3,9 +3,8 @@ package org.baeldung.config;
 import java.util.ArrayList;
 import java.util.List;
 
-
 import org.baeldung.converter.UserWriterConverter;
-import org.baeldung.event.CascadingMongoEventListener;
+import org.baeldung.event.CascadeSaveMongoEventListener;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
@@ -20,7 +19,7 @@ import com.mongodb.MongoClient;
 @EnableMongoRepositories(basePackages = "org.baeldung.repository")
 public class MongoConfig extends AbstractMongoConfiguration {
 
-    private List<Converter<?,?>> converters = new ArrayList<Converter<?,?>>();
+    private List<Converter<?, ?>> converters = new ArrayList<Converter<?, ?>>();
 
     @Override
     protected String getDatabaseName() {
@@ -36,15 +35,15 @@ public class MongoConfig extends AbstractMongoConfiguration {
     public String getMappingBasePackage() {
         return "org.baeldung";
     }
-    
+
     @Bean
-    public CascadingMongoEventListener cascadingMongoEventListener(){
-        return new CascadingMongoEventListener();
+    public CascadeSaveMongoEventListener cascadingMongoEventListener() {
+        return new CascadeSaveMongoEventListener();
     }
-    
+
     @Override
     public CustomConversions customConversions() {
-       converters.add(new UserWriterConverter());
-       return new CustomConversions(converters);
+        converters.add(new UserWriterConverter());
+        return new CustomConversions(converters);
     }
 }

spring-data-mongodb/src/main/java/org/baeldung/event/CascadeSaveMongoEventListener.java

@@ -9,7 +9,7 @@ import org.springframework.util.ReflectionUtils;
 
 import java.lang.reflect.Field;
 
-public class CascadingMongoEventListener extends AbstractMongoEventListener<Object> {
+public class CascadeSaveMongoEventListener extends AbstractMongoEventListener<Object> {
     @Autowired
     private MongoOperations mongoOperations;
 
@@ -24,7 +24,7 @@ public class CascadingMongoEventListener extends AbstractMongoEventListener<Obje
                     final Object fieldValue = field.get(source);
 
                     if (fieldValue != null) {
-                        DbRefFieldCallback callback = new DbRefFieldCallback();
+                        FieldCallback callback = new FieldCallback();
 
                         ReflectionUtils.doWithFields(fieldValue.getClass(), callback);
 

spring-data-mongodb/src/main/java/org/baeldung/event/FieldCallback.java

@@ -5,7 +5,7 @@ import java.lang.reflect.Field;
 import org.springframework.data.annotation.Id;
 import org.springframework.util.ReflectionUtils;
 
-public class DbRefFieldCallback implements ReflectionUtils.FieldCallback {
+public class FieldCallback implements ReflectionUtils.FieldCallback {
     private boolean idFound;
 
     public void doWith(Field field) throws IllegalArgumentException, IllegalAccessException {

spring-data-mongodb/src/main/java/org/baeldung/model/EmailAddress.java

@@ -8,12 +8,12 @@ public class EmailAddress {
     @Id
     private String id;
     private String value;
-    
-    public EmailAddress(){
+
+    public EmailAddress() {
     }
-    
+
     public EmailAddress(String value) {
-        this.value =  value;
+        this.value = value;
     }
 
     public String getId() {

spring-data-mongodb/src/main/java/org/baeldung/model/User.java

@@ -20,17 +20,16 @@ public class User {
     private String name;
 
     private Integer age;
-    
+
     @DBRef
     @Field("email")
     @CascadeSave
     private EmailAddress emailAddress;
-    
-    public User(){
+
+    public User() {
     }
 
-    
-    public User(String name, Integer age, String value){
+    public User(String name, Integer age, String value) {
         this.name = name;
         this.age = age;
         this.emailAddress = new EmailAddress(value);