001/* Copyright (C) 2013 TU Dortmund 002 * This file is part of AutomataLib, http://www.automatalib.net/. 003 * 004 * AutomataLib is free software; you can redistribute it and/or 005 * modify it under the terms of the GNU Lesser General Public 006 * License version 3.0 as published by the Free Software Foundation. 007 * 008 * AutomataLib is distributed in the hope that it will be useful, 009 * but WITHOUT ANY WARRANTY; without even the implied warranty of 010 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 011 * Lesser General Public License for more details. 012 * 013 * You should have received a copy of the GNU Lesser General Public 014 * License along with AutomataLib; if not, see 015 * http://www.gnu.de/documents/lgpl.en.html. 016 */ 017package net.automatalib.words.impl; 018 019import java.util.List; 020 021import net.automatalib.commons.util.collections.CollectionsUtil; 022import net.automatalib.words.Alphabet; 023 024public abstract class Alphabets { 025 026 public static <T> Alphabet<T> fromList(List<? extends T> list) { 027 return new ListAlphabet<>(list); 028 } 029 030 @SafeVarargs 031 public static <T> Alphabet<T> fromArray(T ...symbols) { 032 return new ArrayAlphabet<>(symbols); 033 } 034 035 public static <E extends Enum<E>> Alphabet<E> fromEnum(Class<E> enumClazz, boolean withNull) { 036 return new EnumAlphabet<>(enumClazz, withNull); 037 } 038 039 public static <E extends Enum<E>> Alphabet<E> fromEnum(Class<E> enumClazz) { 040 return fromEnum(enumClazz, false); 041 } 042 043 public static Alphabet<Integer> integers(int startInclusive, int endInclusive) { 044 List<Integer> lst = CollectionsUtil.intRange(startInclusive, endInclusive + 1); 045 return fromList(lst); 046 } 047 048 public static Alphabet<Character> characters(char startInclusive, char endInclusive) { 049 List<Character> lst = CollectionsUtil.charRange(startInclusive, (char)(endInclusive + 1)); 050 return fromList(lst); 051 } 052 053 054 055 private Alphabets() { 056 // prevent inheritance 057 } 058 059}