Merge pull request #61 from AlexProgrammerDE/fix/locale-root-case-conversion

Use Locale.ROOT for toLowerCase/toUpperCase calls

Author: Exlll

configlib-core/src/main/java/de/exlll/configlib/RootSerializer.java

@@ -3,6 +3,7 @@
 import de.exlll.configlib.ConfigurationProperties.EnvVarResolutionConfiguration;
 
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import java.util.function.Consumer;
@@ -86,7 +87,7 @@ private void preprocessEnvVarMap(String prefix, Map<Object, Object> map) {
                         : prefix + '_' + key;
                 envVar = envVarConfig.caseSensitive()
                         ? envVar
-                        : envVar.toUpperCase();
+                        : envVar.toUpperCase(Locale.ROOT);
                 final String envVarVal = environment.getValue(envVar);
                 preprocessRecursively(val, envVar, envVarVal, entry::setValue);
             }
@@ -100,7 +101,7 @@ private void preprocessEnvVarList(String prefix, List<Object> list) {
                         : prefix + '_' + i;
                 envVar = envVarConfig.caseSensitive()
                         ? envVar
-                        : envVar.toUpperCase();
+                        : envVar.toUpperCase(Locale.ROOT);
                 final String envVarVal = environment.getValue(envVar);
                 final int index = i;
                 preprocessRecursively(val, envVar, envVarVal, o -> list.set(index, o));

configlib-core/src/main/java/de/exlll/configlib/Serializers.java

@@ -264,7 +264,7 @@ private static String buildExceptionMessage(
                     .formatted(
                             sourceTypeName,
                             value,
-                            sourceTypeName.toLowerCase(),
+                            sourceTypeName.toLowerCase(Locale.ROOT),
                             coercionType
                     );
         }

configlib-core/src/test/java/de/exlll/configlib/SerializersTest.java

@@ -1111,7 +1111,7 @@ private static String buildExceptionMessage(
                    %s '%s' cannot be deserialized to type String because %s-to-string \
                    coercion has not been configured. If you want to allow this type of coercion, \
                    add the deserialization coercion type '%s' via a ConfigurationProperties object.\
-                   """.formatted(sourceTypeName, value, sourceTypeName.toLowerCase(), deserializationCoercingType);
+                   """.formatted(sourceTypeName, value, sourceTypeName.toLowerCase(Locale.ROOT), deserializationCoercingType);
         }
 
         @Test