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Java Simplified. Extensions and Useful Constructs for the Java Platform. Codeprimate Elements (a.k.a. cp-elements) is a Java library and micro-framework used to simplify the development of software applications written in Java. Elements packages several APIs into one library in order to address various application concerns and aspects of software design and development collectively and conveniently. Elements is a highly simple, yet robust and proven library built on solid OO principles, software design patterns and best practices to effectively solve common and reoccurring problems in software development.

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/*
 * Copyright 2016 Author or Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.cp.elements.enums;

import static org.cp.elements.util.CollectionExtensions.from;

import java.util.Arrays;
import java.util.Calendar;

/**
 * The {@link Weekday} enum is an {@link Enum enumeration} for all the days in a week.
 *
 * @author John J. Blum
 * @see java.lang.Enum
 * @see java.util.Calendar
 * @since 1.0.0
 */
@SuppressWarnings("unused")
public enum Weekday {

  SUNDAY("Sun", "Sunday", 1, Calendar.SUNDAY),
  MONDAY("Mon", "Monday", 2, Calendar.MONDAY),
  TUESDAY("Tue", "Tuesday", 3, Calendar.TUESDAY),
  WEDNESDAY("Wed", "Wednesday", 4, Calendar.WEDNESDAY),
  THURSDAY("Thu", "Thursday", 5, Calendar.THURSDAY),
  FRIDAY("Fri", "Friday", 6, Calendar.FRIDAY),
  SATURDAY("Sat", "Saturday", 7, Calendar.SATURDAY);

  public static Weekday valueOfAbbreviation(String abbreviation) {

    return Arrays.stream(values())
      .filter(day -> day.getAbbreviation().equalsIgnoreCase(abbreviation))
      .findFirst()
      .orElse(null);
  }

  public static Weekday valueOfCalendarConstant(int calendarConstant) {

    return Arrays.stream(values())
      .filter(day -> day.getCalendarConstant() == calendarConstant)
      .findFirst()
      .orElse(null);
  }

  public static Weekday valueOfName(String name) {

    return Arrays.stream(values())
      .filter(day -> day.getName().equalsIgnoreCase(name))
      .findFirst()
      .orElse(null);
  }

  public static Weekday valueOfPosition(int position) {

    return Arrays.stream(values())
      .filter(day -> day.getPosition() == position)
      .findFirst()
      .orElse(null);
  }

  private final int calendarConstant;
  private final int position;

  private final String abbreviation;
  private final String name;

  Weekday(String abbreviation, String name, int position, int calendarConstant) {

    this.abbreviation = abbreviation;
    this.name = name;
    this.position = position;
    this.calendarConstant = calendarConstant;
  }

  public String getAbbreviation() {
    return this.abbreviation;
  }

  public int getCalendarConstant() {
    return this.calendarConstant;
  }

  public String getName() {
    return this.name;
  }

  public int getPosition() {
    return this.position;
  }

  public boolean isWeekday() {
    return !isWeekend();
  }

  public boolean isWeekend() {
    return from(SUNDAY, SATURDAY).toSet().contains(this);
  }

  @Override
  public String toString() {
    return getName();
  }
}