KEYCLOAK-12689 - Improvements for camelCase config properties

quarkus/extensions/src/main/java/org/keycloak/provider/quarkus/MicroProfileConfigProvider.java

@@ -104,10 +104,31 @@ public class MicroProfileConfigProvider implements Config.ConfigProvider {
         }
 
         private <T> T getValue(String key, Class<T> clazz, T defaultValue) {
-            T value = config.getOptionalValue(prefix + "." + key, clazz).orElse(defaultValue);
+            String property = prefix + "." + key;
-            return value;
+            return config.getOptionalValue(toDashCase(property), clazz)
+                    .orElseGet(() -> config.getOptionalValue(property, clazz)
+                        .orElse(defaultValue));
         }
 
     }
 
+    private static String toDashCase(String s) {
+
+        StringBuilder sb = new StringBuilder(s.length());
+        boolean l = false;
+
+        for (int i = 0; i < s.length(); i++) {
+            char c = s.charAt(i);
+            if (l && Character.isUpperCase(c)) {
+                sb.append('-');
+                c = Character.toLowerCase(c);
+                l = false;
+            } else {
+                l = Character.isLowerCase(c);
+            }
+            sb.append(c);
+        }
+        return sb.toString();
+    }
+
 }