1 /*

     2  * Copyright (c) 2000, 2004, 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.javazic;

    27 

    28 import java.io.BufferedReader;

    29 import java.io.FileReader;

    30 import java.io.FileNotFoundException;

    31 import java.io.IOException;

    32 import java.util.ArrayList;

    33 import java.util.HashMap;

    34 import java.util.HashSet;

    35 import java.util.List;

    36 import java.util.Map;

    37 import java.util.Set;

    38 import java.util.StringTokenizer;

    39 

    40 /**

    41  * Zone holds information corresponding to a "Zone" part of a time

    42  * zone definition file.

    43  *

    44  * @since 1.4

    45  */

    46 class Zone {

    47     // zone name (e.g., "America/Los_Angeles")

    48     private String name;

    49 

    50     // zone records

    51     private List<ZoneRec> list;

    52 

    53     // target zone names for this compilation

    54     private static Set<String> targetZones;

    55 

    56     /**

    57      * Constructs a Zone with the specified zone name.

    58      * @param name the zone name

    59      */

    60     Zone(String name) {

    61         this.name = name;

    62         list = new ArrayList<ZoneRec>();

    63     }

    64 

    65     /**

    66      * Reads time zone names to be generated, called "target zone

    67      * name", from the specified text file and creats an internal hash

    68      * table to keep those names. It's assumed that one text line

    69      * contains a zone name or comments if it starts with

    70      * '#'. Comments can't follow a zone name in a single line.

    71      * @param fileName the text file name

    72      */

    73     static void readZoneNames(String fileName) {

    74         if (fileName == null) {

    75             return;

    76         }

    77         BufferedReader in = null;

    78         try {

    79             FileReader fr = new FileReader(fileName);

    80             in = new BufferedReader(fr);

    81         } catch (FileNotFoundException e) {

    82             Main.panic("can't open file: " + fileName);

    83         }

    84         targetZones = new HashSet<String>();

    85         String line;

    86 

    87         try {

    88             while ((line = in.readLine()) != null) {

    89                 line = line.trim();

    90                 if (line.length() == 0 || line.charAt(0) == '#') {

    91                     continue;

    92                 }

    93                 if (!targetZones.add(line)) {

    94                     Main.warning("duplicated target zone name: " + line);

    95                 }

    96             }

    97             in.close();

    98         } catch (IOException e) {

    99             Main.panic("IO error: "+e.getMessage());

   100         }

   101     }

   102 

   103     /**

   104      * Determines whether the specified zone is one of the target zones.

   105      * If no target zones are specified, this method always returns

   106      * true for any zone name.

   107      * @param zoneName the zone name

   108      * @return true if the specified name is a target zone.

   109      */

   110     static boolean isTargetZone(String zoneName) {

   111         if (targetZones == null) {

   112             return true;

   113         }

   114         return targetZones.contains(zoneName);

   115     }

   116 

   117     /**

   118      * Forces to add "MET" to the target zone table. This is because

   119      * there is a conflict between Java zone name "WET" and Olson zone

   120      * name.

   121      */

   122     static void addMET() {

   123         if (targetZones != null) {

   124             targetZones.add("MET");

   125         }

   126     }

   127 

   128     /**

   129      * @return the zone name

   130      */

   131     String getName() {

   132         return name;

   133     }

   134 

   135     /**

   136      * Adds the specified zone record to the zone record list.

   137      */

   138     void add(ZoneRec rec) {

   139         list.add(rec);

   140     }

   141 

   142     /**

   143      * @param index the index at which the zone record in the list is returned.

   144      * @return the zone record specified by the index.

   145      */

   146     ZoneRec get(int index) {

   147         return list.get(index);

   148     }

   149 

   150     /**

   151      * @return the size of the zone record list

   152      */

   153     int size() {

   154         return list.size();

   155     }

   156 

   157     /**

   158      * Resolves the reference to a rule in each zone record.

   159      * @param zi the Zoneinfo object with which the rule reference is

   160      * resolved.

   161      */

   162     void resolve(Zoneinfo zi) {

   163         for (int i = 0; i < list.size(); i++) {

   164             ZoneRec rec = list.get(i);

   165             rec.resolve(zi);

   166         }

   167     }

   168 }