Simplified the regex pattern that is used to convert field names to config keys.

Also added some documentation and examples.

src/main/java/com/nisovin/shopkeepers/config/ConfigHelper.java

@@ -19,11 +19,38 @@ import com.nisovin.shopkeepers.util.TextUtils;
 
 public class ConfigHelper {
 
-	private static final Pattern CONFIG_KEY_PATTERN = Pattern.compile("([A-Z][a-z]+)");
+	private static final Pattern CONFIG_KEY_PATTERN = Pattern.compile("([A-Z])");
 
 	private ConfigHelper() {
 	}
 
+	/**
+	 * Converts from lower camel case field names to lowercase config keys that separate words by hyphens (-).
+	 * <p>
+	 * Some notes on the conversion:
+	 * <ul>
+	 * <li>Each uppercase (ASCII) character is interpreted as the beginning of a new word and a hyphen is inserted.
+	 * <li>The conversion does not deal with uppercase abbreviations. For example, 'someSQLField' is expected to be
+	 * called 'someSqlField'.
+	 * <li>The field name is expected to start with a lowercase character.
+	 * <li>Digits are treated like any other lowercase characters and not separated into different words.
+	 * <li>All characters are converted to lowercase.
+	 * </ul>
+	 * <p>
+	 * Examples:
+	 * <ul>
+	 * <li>"ab" -> "ab"
+	 * <li>"aBcDe" -> "a-bc-de"
+	 * <li>"aBCDe" -> "a-b-c-de"
+	 * <li>"textLine1" -> "text-line1"
+	 * <li>"1apple" -> "1apple"
+	 * <li>"aBc1De2" -> "a-bc1-de2"
+	 * </ul>
+	 * 
+	 * @param fieldName
+	 *            the field name
+	 * @return the config key
+	 */
 	public static String toConfigKey(String fieldName) {
 		return CONFIG_KEY_PATTERN.matcher(fieldName).replaceAll("-$1").toLowerCase(Locale.ROOT);
 	}