1 /*
   2  * Copyright (c) 2012, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package build.tools.cldrconverter;
  27 
  28 import java.util.Locale;
  29 
  30 /**
  31  * Constants for the Calendars supported by JRE.
  32  */
  33 enum CalendarType {
  34 
  35     GREGORIAN, BUDDHIST, JAPANESE;
  36 
  37     private static final int[][] ERA_DATA = {
  38         // start index, array length
  39         {0,   2},   // gregorian
  40         {0,   1},   // buddhist
  41         {232, 4},   // japanese (eras from Meiji)
  42     };
  43 
  44     private final String lname; // lowercase name
  45 
  46     private CalendarType() {
  47         lname = name().toLowerCase(Locale.ROOT);
  48     }
  49 
  50     String lname() {
  51         return lname;
  52     }
  53 
  54     String keyElementName() {
  55         return (this == GREGORIAN) ? "" : lname + ".";
  56     }
  57 
  58     int normalizeEraIndex(int index) {
  59         index -= ERA_DATA[ordinal()][0];
  60         if (index >= ERA_DATA[ordinal()][1]) {
  61             index = -1;
  62         }
  63         return index;
  64     }
  65 
  66     int getEraLength(String name) {
  67         return ERA_DATA[ordinal()][1];
  68     }
  69 
  70     static CalendarType forName(String name) {
  71         for (CalendarType type : values()) {
  72             if (type.lname.equals(name)) {
  73                 return type;
  74             }
  75         }
  76         return null;
  77     }
  78 }