Fixed serialization for collections made by utilities

README.MD

@@ -20,7 +20,7 @@ maven {
     url = 'https://repo.mikigal.pl/releases'
 }
 
-compile group: 'pl.mikigal', name: 'ConfigAPI', version: '1.1.2'
+compile group: 'pl.mikigal', name: 'ConfigAPI', version: '1.1.3'
 ```
 
 #### Maven
@@ -33,7 +33,7 @@ compile group: 'pl.mikigal', name: 'ConfigAPI', version: '1.1.2'
 <dependency>
     <groupId>pl.mikigal</groupId>
     <artifactId>ConfigAPI</artifactId>
-    <version>1.1.2</version>
+    <version>1.1.3</version>
     <scope>compile</scope>
 </dependency>
 ```

build.gradle

@@ -4,7 +4,7 @@ plugins {
 }
 
 group 'pl.mikigal'
-version '1.1.2'
+version '1.1.3'
 
 publishing {
     repositories {

src/main/java/pl/mikigal/config/serializer/universal/UniversalCollectionSerializer.java

@@ -27,6 +27,11 @@ protected void saveObject(String path, Collection object, BukkitConfiguration co
 			throw new IllegalStateException("Can't set empty Collection to config");
 		}
 
+		if (object.getClass().isMemberClass()) {
+			// Workaround for utilities, e. g. Arrays.asList()
+			object = new ArrayList(object);
+		}
+
 		Class<?> generic = TypeUtils.getCollectionGeneric(object);
 		Serializer<?> serializer = Serializers.of(generic);
 		if (serializer == null && !TypeUtils.isSimpleType(generic)) {

src/main/java/pl/mikigal/config/serializer/universal/UniversalMapSerializer.java

@@ -26,6 +26,11 @@ protected void saveObject(String path, Map object, BukkitConfiguration configura
 			throw new IllegalStateException("Can't set empty Map to config");
 		}
 
+		if (object.getClass().isMemberClass()) {
+			// Workaround for utilities, e. g. Collections.singletonMap()
+			object = new HashMap(object);
+		}
+
 		Class<?> generic = TypeUtils.getMapGeneric(object)[1];
 		Serializer<?> serializer = Serializers.of(generic);
 		if (serializer == null && !TypeUtils.isSimpleType(generic)) {