1 /* 2 * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * <code>BackEnd</code> is an abstract base class for a back-end of compiling 26 * Olson's zoneinfo database and generating Java zoneinfo database. 27 * 28 * @since 1.4 29 */ 30 abstract class BackEnd { 31 32 /** 33 * Receives each zone's TimeZone information which was created by 34 * {@link Zoneinfo#parse} in class <code>Zoneinfo</code>, 35 * and processes it. 36 * 37 * @param tz Timezone object for each zone 38 * @return 0 if no error occurred, otherwise 1. 39 */ 40 abstract int processZoneinfo(Timezone tz); 41 42 /** 43 * Receives whole information which is generated by JavaZic's front-end 44 * in the form of Mapping object and generates all Java zone information 45 * files. 46 * 47 * @param m Mappings object which is generated by 48 * {@link Main#compile() Main.compile()}. 49 * @return 0 if no error occurred, otherwise 1. 50 */ 51 abstract int generateSrc(Mappings m); 52 53 /** 54 * Decides which backend class should be used and returns its instance. 55 * @return an instance of backend class 56 */ 57 static BackEnd getBackEnd() { 58 if (Zoneinfo.isYearForTimeZoneDataSpecified) { 59 return new Simple(); 60 } else if (Main.outputDoc) { 61 return new GenDoc(); 62 } else { 63 return new Gen(); 64 } 65 } 66 }