1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.timezone.version.tools; 17 18 import com.android.i18n.timezone.TzDataSetVersion; 19 20 import java.io.File; 21 import java.io.FileInputStream; 22 import java.io.FileOutputStream; 23 import java.io.IOException; 24 import java.io.InputStreamReader; 25 import java.io.OutputStream; 26 import java.io.Reader; 27 import java.util.Properties; 28 29 /** 30 * A command-line tool for creating a time zone data set version file. 31 * 32 * <p>Args: 33 * <dl> 34 * <dt>input properties file</dt> 35 * </dl> 36 * 37 * <p>The input properties file must have the entries: 38 * <dl> 39 * <dt>rules.version</dt> 40 * <dd>The IANA rules version.</dd> 41 * <dt>revision</dt> 42 * <dd>IANA data revision (typically 1).</dd> 43 * <dt>output.version.file</dt> 44 * <dd>The location to write the version file to.</dd> 45 * </dl> 46 * 47 * <p>The output consists of: 48 * <ul> 49 * <li>A version file.</li> 50 * </ul> 51 */ 52 public class CreateTzVersion { 53 CreateTzVersion()54 private CreateTzVersion() {} 55 main(String[] args)56 public static void main(String[] args) throws Exception { 57 if (args.length != 1) { 58 printUsage(); 59 System.exit(1); 60 } 61 File f = new File(args[0]); 62 if (!f.exists()) { 63 System.err.println("Properties file " + f + " not found"); 64 printUsage(); 65 System.exit(2); 66 } 67 Properties properties = loadProperties(f); 68 String ianaRulesVersion = getMandatoryProperty(properties, "rules.version"); 69 int revision = Integer.parseInt(getMandatoryProperty(properties, "revision")); 70 71 // Create an object to hold version metadata for the tz data. 72 TzDataSetVersion tzDataSetVersion = new TzDataSetVersion( 73 TzDataSetVersion.currentFormatMajorVersion(), 74 TzDataSetVersion.currentFormatMinorVersion(), 75 ianaRulesVersion, 76 revision); 77 byte[] tzDataSetVersionBytes = tzDataSetVersion.toBytes(); 78 79 File outputVersionFile = new File(getMandatoryProperty(properties, "output.version.file")); 80 81 // Write the tz data set version file. 82 try (OutputStream os = new FileOutputStream(outputVersionFile)) { 83 os.write(tzDataSetVersionBytes); 84 } 85 System.out.println("Wrote " + outputVersionFile); 86 } 87 getMandatoryProperty(Properties p, String propertyName)88 private static String getMandatoryProperty(Properties p, String propertyName) { 89 String value = p.getProperty(propertyName); 90 if (value == null) { 91 System.out.println("Missing property: " + propertyName); 92 printUsage(); 93 System.exit(3); 94 } 95 return value; 96 } 97 loadProperties(File f)98 private static Properties loadProperties(File f) throws IOException { 99 Properties p = new Properties(); 100 try (Reader reader = new InputStreamReader(new FileInputStream(f))) { 101 p.load(reader); 102 } 103 return p; 104 } 105 printUsage()106 private static void printUsage() { 107 System.out.println("Usage:"); 108 System.out.println("\t" + CreateTzVersion.class.getName() + 109 " <tzupdate.properties file>"); 110 } 111 } 112