Added functionality to add customConverters.

Added functionality to register custom converters in the list + cleaned up the code a little and.

Author: bipoool

src/main/java/org/springframework/data/couchbase/config/AbstractCouchbaseConfiguration.java

@@ -431,15 +431,11 @@ public CustomConversions customConversions() {
 	 * and {@link #couchbaseMappingContext(CustomConversions)}.
 	 *
 	 * @param cryptoManager
+	 * @param objectMapper
 	 * @return must not be {@literal null}.
 	 */
 	public CustomConversions customConversions(CryptoManager cryptoManager, ObjectMapper objectMapper) {
-		List<Object> newConverters = new ArrayList();
-		// The following
-		newConverters.add(new OtherConverters.EnumToObject(getObjectMapper()));
-		newConverters.add(new IntegerToEnumConverterFactory(getObjectMapper()));
-		newConverters.add(new StringToEnumConverterFactory(getObjectMapper()));
-		newConverters.add(new BooleanToEnumConverterFactory(getObjectMapper()));
+		List<Object> newConverters = additionalConverters();
 		CustomConversions customConversions = CouchbaseCustomConversions.create(configurationAdapter -> {
 			SimplePropertyValueConversions valueConversions = new SimplePropertyValueConversions();
 			valueConversions.setConverterFactory(
@@ -452,6 +448,34 @@ public CustomConversions customConversions(CryptoManager cryptoManager, ObjectMa
 		return customConversions;
 	}
 
+	/**
+	 * This function makes a list of custom converters.
+	 * This list can be updated via {@link #registerAdditionalConverters(List)}
+	 *
+	 * @return additionalConverters - must not be {@literal null}.
+	 */
+	public List<Object> additionalConverters() {
+
+		List<Object> additionalConverters = new ArrayList();
+		additionalConverters.add(new OtherConverters.EnumToObject(getObjectMapper()));
+		additionalConverters.add(new IntegerToEnumConverterFactory(getObjectMapper()));
+		additionalConverters.add(new StringToEnumConverterFactory(getObjectMapper()));
+		additionalConverters.add(new BooleanToEnumConverterFactory(getObjectMapper()));
+
+		// Register more converters
+		registerAdditionalConverters(additionalConverters);
+
+		return additionalConverters;
+
+	}
+
+	/**
+	 * This should be overridden in order to update the {@link #additionalConverters()} List
+	 */
+	protected void registerAdditionalConverters(List<Object> converters) {
+		// NO_OP
+	}
+
 	public static Map<Class<? extends Annotation>, Class<?>> annotationToConverterMap() {
 		Map<Class<? extends Annotation>, Class<?>> map = new HashMap();
 		map.put(Encrypted.class, CryptoConverter.class);