Fixes comments not applying when inside nested classes.

omega-config-base/src/main/java/draylar/omegaconfig/OmegaConfig.java

@@ -23,7 +23,12 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
 
 public class OmegaConfig {
 
@@ -109,10 +114,9 @@ public static <T extends Config> void writeConfig(Class<T> configClass, T instan
             addFieldComments(field, keyToComments);
         }
 
-        // get inner-class fields
-        // TODO: recursively get inner classes?
-        for (Class<?> innerClass : configClass.getDeclaredClasses()) {
-            for (Field field : innerClass.getDeclaredFields()) {
+        // "flattens" all the inner classes of the Config class into a single list
+        for (Class<?> clazz : flatten(configClass.getDeclaredClasses())) {
+            for (Field field : clazz.getDeclaredFields()) {
                 addFieldComments(field, keyToComments);
             }
         }
@@ -154,6 +158,28 @@ public static <T extends Config> void writeConfig(Class<T> configClass, T instan
         }
     }
 
+    private static List<Class<?>> flatten(Class<?>[] array) {
+        List<Class<?>> list = new ArrayList<>();
+
+        for (Class<?> clazz : array) {
+            populateRecursively(list, clazz);
+        }
+
+        return list;
+    }
+
+    private static void populateRecursively(List<Class<?>> list, Class<?> aClass) {
+        list.add(aClass);
+
+        Class<?>[] classes = aClass.getDeclaredClasses();
+
+        if (classes.length != 0) {
+            for (Class<?> clazz : classes) {
+                populateRecursively(list, clazz);
+            }
+        }
+    }
+
     private static void addFieldComments(Field field, Map<String, String> keyToComments) {
         String fieldName = field.getName();
         Annotation[] annotations = field.getDeclaredAnnotations();

src/testmod/java/draylar/omegatest/OmegaTestMain.java

@@ -2,6 +2,7 @@
 
 import draylar.omegaconfig.OmegaConfig;
 import draylar.omegatest.config.ClassConfigTest;
+import draylar.omegatest.config.CommentedNestedClassConfig;
 import draylar.omegatest.config.NestedConfigTest;
 import draylar.omegatest.config.SimpleConfigTest;
 import draylar.omegatest.config.StructuresConfigTest;
@@ -13,6 +14,7 @@ public class OmegaTestMain implements ModInitializer {
     public static final StructuresConfigTest MO_CONFIG = OmegaConfig.register(StructuresConfigTest.class);
     public static final NestedConfigTest NESTED = OmegaConfig.register(NestedConfigTest.class);
     public static final ClassConfigTest CLASS = OmegaConfig.register(ClassConfigTest.class);
+    public static final CommentedNestedClassConfig COMMENTED_NESTED_CLASS = OmegaConfig.register(CommentedNestedClassConfig.class);
 
     @Override
     public void onInitialize() {

src/testmod/java/draylar/omegatest/config/CommentedNestedClassConfig.java

@@ -0,0 +1,73 @@
+package draylar.omegatest.config;
+
+import draylar.omegaconfig.api.Comment;
+import draylar.omegaconfig.api.Config;
+
+public class CommentedNestedClassConfig implements Config {
+
+    @Comment("Very nested test")
+    public First first = new First();
+
+    @Comment("True")
+    public boolean test = false;
+
+    @Comment("First-Level")
+    public VeryNested veryNested = new VeryNested();
+
+    public static class First {
+        @Comment("Cucumbers")
+        public boolean cucumbers = true;
+
+        @Comment("InnerFirst")
+        public InnerFirst innerFirst = new InnerFirst();
+
+        @Comment("InnerSecond")
+        public InnerSecond innerSecond = new InnerSecond();
+
+        public static class InnerFirst {
+            @Comment("Number of Tomatoes")
+            public int numberOfTomatoes = 10;
+        }
+
+        public static class InnerSecond {
+            @Comment("Inner Second First")
+            public InnerSecondFirst innerSecondFirst = new InnerSecondFirst();
+
+            public static class InnerSecondFirst {
+                @Comment("Olive Oil")
+                public String oliveOil = "oliveOil";
+            }
+        }
+    }
+
+    public static class VeryNested {
+        @Comment("Second-Level")
+        public Very very = new Very();
+        public static class Very {
+            @Comment("Third-Level")
+            public VeryVery veryVery = new VeryVery();
+            public static class VeryVery {
+                @Comment("Forth-Level")
+                public VeryVeryVery veryVeryVery = new VeryVeryVery();
+                public static class VeryVeryVery {
+                    @Comment("Fifth-Level")
+                    public VeryVeryVeryVery veryVeryVeryVery = new VeryVeryVeryVery();
+                    public static class VeryVeryVeryVery {
+                        @Comment("Sixth-Level")
+                        public String last = "last";
+                    }
+                }
+            }
+        }
+    }
+
+    @Override
+    public String getName() {
+        return "commented-inner-classes";
+    }
+
+    @Override
+    public String getExtension() {
+        return "json5";
+    }
+}