From c360e0b97a40899c869fe00c596ea25b4db8e909 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Roland=20H=C3=A4der?= <roland@mxchange.org>
Date: Sun, 19 Apr 2020 06:01:27 +0200
Subject: [PATCH] Continued: - always validate parameter of
 public/package/protected methods and constructors - renamed i18nKey to
 messageKey
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Signed-off-by: Roland Häder <roland@mxchange.org>
---
 .../income/interval/FinancialInterval.java      | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/org/mxchange/jfinancials/model/income/interval/FinancialInterval.java b/src/org/mxchange/jfinancials/model/income/interval/FinancialInterval.java
index 3a40035..8ea6b18 100644
--- a/src/org/mxchange/jfinancials/model/income/interval/FinancialInterval.java
+++ b/src/org/mxchange/jfinancials/model/income/interval/FinancialInterval.java
@@ -58,10 +58,25 @@ public enum FinancialInterval implements Serializable {
 	/**
 	 * Constructor with i18n translation key and CSS style class
 	 * <p>
-	 * @param messageKey  Message key (i18n)
+	 * @param messageKey Message key (i18n)
 	 * @param styleClass CSS style class
 	 */
 	private FinancialInterval (final String messageKey, final String styleClass) {
+		// Validate parameter
+		if (null == messageKey) {
+			// Throw NPE
+			throw new NullPointerException("messageKey is null"); //NOI18N
+		} else if (messageKey.isEmpty()) {
+			// Throw IAE
+			throw new IllegalArgumentException("messageKey is empty"); //NOI18N
+		} else if (null == styleClass) {
+			// Throw NPE
+			throw new NullPointerException("styleClass is null"); //NOI18N
+		} else if (styleClass.isEmpty()) {
+			// Throw IAE
+			throw new IllegalArgumentException("styleClass is empty"); //NOI18N
+		}
+
 		// Set it here
 		this.messageKey = messageKey;
 		this.styleClass = styleClass;
-- 
2.39.5