From ff5a3511d5e683fa015fdb8d1e91b17b9f91bd53 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Roland=20H=C3=A4der?= <roland@mxchange.org>
Date: Sun, 19 Apr 2020 05:09:03 +0200
Subject: [PATCH] Continued: - moved from jcontacts-business-core as this is
 very generic
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Signed-off-by: Roland Häder <roland@mxchange.org>
---
 .../mxchange/jcoreee/dates/DayOfTheWeek.java  | 140 ++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 src/org/mxchange/jcoreee/dates/DayOfTheWeek.java

diff --git a/src/org/mxchange/jcoreee/dates/DayOfTheWeek.java b/src/org/mxchange/jcoreee/dates/DayOfTheWeek.java
new file mode 100644
index 0000000..7106028
--- /dev/null
+++ b/src/org/mxchange/jcoreee/dates/DayOfTheWeek.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2016 - 2020 Free Software Foundation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mxchange.jcoreee.dates;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+
+/**
+ * An enumeration suitable for persisting
+ * <p>
+ * @author Roland Häder<roland@mxchange.org>
+ */
+public enum DayOfTheWeek {
+	SUNDAY {
+		@Override
+		public int toCalendar () {
+			return Calendar.SUNDAY;
+		}
+
+	},
+	MONDAY {
+		@Override
+		public int toCalendar () {
+			return Calendar.MONDAY;
+		}
+	},
+	TUESDAY {
+		@Override
+		public int toCalendar () {
+			return Calendar.TUESDAY;
+		}
+	},
+	WEDNESDAY {
+		@Override
+		public int toCalendar () {
+			return Calendar.WEDNESDAY;
+		}
+	},
+	THURSDAY {
+		@Override
+		public int toCalendar () {
+			return Calendar.THURSDAY;
+		}
+	},
+	FRIDAY {
+		@Override
+		public int toCalendar () {
+			return Calendar.FRIDAY;
+		}
+	},
+	SATURDAY {
+		@Override
+		public int toCalendar () {
+			return Calendar.SATURDAY;
+		}
+	};
+
+	/**
+	 * Simple date format instance
+	 */
+	private static final SimpleDateFormat SIMPLE_DATE_FORMAT;
+
+	static {
+		// Init SDF once
+		SIMPLE_DATE_FORMAT = (SimpleDateFormat) SimpleDateFormat.getInstance();
+
+		// Set pattern
+		SIMPLE_DATE_FORMAT.applyPattern("EEEEEEEEEE"); //NOI18N
+	}
+
+	public abstract int toCalendar ();
+
+	/**
+	 * Returns the DateOfTheWeek instance by given day number (0-6)
+	 * <p>
+	 * @param day Day number (0-6)
+	 * <p>
+	 * @return DateOfTheWeek instance
+	 */
+	public static DayOfTheWeek fromCalendarDay (final int day) {
+		// Walk through all values
+		for (final DayOfTheWeek dayOfWeek : DayOfTheWeek.values()) {
+			if (dayOfWeek.toCalendar() == day) {
+				return dayOfWeek;
+			}
+		}
+
+		return null; // Consider throwing IllegalArgumentException
+	}
+
+	/**
+	 * Returns the DateOfTheWeek instance by given Date instance
+	 * <p>
+	 * @param date Date instance
+	 * <p>
+	 * @return DateOfTheWeek instance
+	 */
+	public static DayOfTheWeek getByDate (final Date date) {
+		// Init calendar
+		final Calendar calendar = GregorianCalendar.getInstance();
+
+		// Set time
+		calendar.setTime(date);
+
+		// Return DayOfTheWeek
+		return fromCalendarDay(calendar.get(Calendar.DAY_OF_WEEK));
+	}
+
+	/*
+	 * Should return the localized day of the week
+	 */
+	@Override
+	public String toString () {
+		// Init calendar
+		final Calendar calendar = new GregorianCalendar();
+
+		// Set DAY_OF_WEEK
+		calendar.set(Calendar.DAY_OF_WEEK, this.toCalendar());
+
+		// Format string
+		return SIMPLE_DATE_FORMAT.format(calendar.getTime());
+	}
+
+}
-- 
2.39.5