/*
* Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
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*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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/*
* Copyright (c) 2009-2012, Stephen Colebourne & Michael Nascimento Santos
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of JSR-310 nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package build.tools.tzdb;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.ParsePosition;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Scanner;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.regex.Matcher;
import java.util.regex.MatchResult;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
/**
* A compiler that reads a set of TZDB time-zone files and builds a single
* combined TZDB data file.
*
* @since 1.8
*/
public final class TzdbZoneRulesCompiler {
public static void main(String[] args) {
new TzdbZoneRulesCompiler().compile(args);
}
private void compile(String[] args) {
if (args.length < 2) {
outputHelp();
return;
}
Path srcDir = null;
Path dstFile = null;
String version = null;
// parse args/options
int i;
for (i = 0; i < args.length; i++) {
String arg = args[i];
if (!arg.startsWith("-")) {
break;
}
if ("-srcdir".equals(arg)) {
if (srcDir == null && ++i < args.length) {
srcDir = Paths.get(args[i]);
continue;
}
} else if ("-dstfile".equals(arg)) {
if (dstFile == null && ++i < args.length) {
dstFile = Paths.get(args[i]);
continue;
}
} else if ("-verbose".equals(arg)) {
if (!verbose) {
verbose = true;
continue;
}
} else if (!"-help".equals(arg)) {
System.out.println("Unrecognised option: " + arg);
}
outputHelp();
return;
}
// check source directory
if (srcDir == null) {
System.err.println("Source directory must be specified using -srcdir");
System.exit(1);
}
if (!Files.isDirectory(srcDir)) {
System.err.println("Source does not exist or is not a directory: " + srcDir);
System.exit(1);
}
// parse source file names
if (i == args.length) {
i = 0;
args = new String[] {"africa", "antarctica", "asia", "australasia", "europe",
"northamerica","southamerica", "backward", "etcetera" };
System.out.println("Source filenames not specified, using default set ( ");
for (String name : args) {
System.out.printf(name + " ");
}
System.out.println(")");
}
// source files in this directory
List<Path> srcFiles = new ArrayList<>();
for (; i < args.length; i++) {
Path file = srcDir.resolve(args[i]);
if (Files.exists(file)) {
srcFiles.add(file);
} else {
System.err.println("Source directory does not contain source file: " + args[i]);
System.exit(1);
}
}
// check destination file
if (dstFile == null) {
dstFile = srcDir.resolve("tzdb.dat");
} else {
Path parent = dstFile.getParent();
if (parent != null && !Files.exists(parent)) {
System.err.println("Destination directory does not exist: " + parent);
System.exit(1);
}
}
try {
// get tzdb source version
Matcher m = Pattern.compile("tzdata(?<ver>[0-9]{4}[A-z])")
.matcher(new String(Files.readAllBytes(srcDir.resolve("VERSION")),
"ISO-8859-1"));
if (m.find()) {
version = m.group("ver");
} else {
System.exit(1);
System.err.println("Source directory does not contain file: VERSION");
}
// load source files
printVerbose("Compiling TZDB version " + version);
TzdbZoneRulesProvider provider = new TzdbZoneRulesProvider(srcFiles);
// build zone rules
printVerbose("Building rules");
// Build the rules, zones and links into real zones.
SortedMap<String, ZoneRules> builtZones = new TreeMap<>();
// build zones
for (String zoneId : provider.getZoneIds()) {
printVerbose("Building zone " + zoneId);
builtZones.put(zoneId, provider.getZoneRules(zoneId));
}
// build aliases
Map<String, String> links = provider.getAliasMap();
for (String aliasId : links.keySet()) {
String realId = links.get(aliasId);
printVerbose("Linking alias " + aliasId + " to " + realId);
ZoneRules realRules = builtZones.get(realId);
if (realRules == null) {
realId = links.get(realId); // try again (handle alias liked to alias)
printVerbose("Relinking alias " + aliasId + " to " + realId);
realRules = builtZones.get(realId);
if (realRules == null) {
throw new IllegalArgumentException("Alias '" + aliasId + "' links to invalid zone '" + realId);
}
links.put(aliasId, realId);
}
builtZones.put(aliasId, realRules);
}
// output to file
printVerbose("Outputting tzdb file: " + dstFile);
outputFile(dstFile, version, builtZones, links);
} catch (Exception ex) {
System.out.println("Failed: " + ex.toString());
ex.printStackTrace();
System.exit(1);
}
System.exit(0);
}
/**
* Output usage text for the command line.
*/
private static void outputHelp() {
System.out.println("Usage: TzdbZoneRulesCompiler <options> <tzdb source filenames>");
System.out.println("where options include:");
System.out.println(" -srcdir <directory> Where to find tzdb source directory (required)");
System.out.println(" -dstfile <file> Where to output generated file (default srcdir/tzdb.dat)");
System.out.println(" -help Print this usage message");
System.out.println(" -verbose Output verbose information during compilation");
System.out.println(" The source directory must contain the unpacked tzdb files, such as asia or europe");
}
/**
* Outputs the file.
*/
private void outputFile(Path dstFile, String version,
SortedMap<String, ZoneRules> builtZones,
Map<String, String> links) {
try (DataOutputStream out = new DataOutputStream(Files.newOutputStream(dstFile))) {
// file version
out.writeByte(1);
// group
out.writeUTF("TZDB");
// versions
out.writeShort(1);
out.writeUTF(version);
// regions
String[] regionArray = builtZones.keySet().toArray(new String[builtZones.size()]);
out.writeShort(regionArray.length);
for (String regionId : regionArray) {
out.writeUTF(regionId);
}
// rules -- remove the dup
List<ZoneRules> rulesList = builtZones.values().stream()
.distinct()
.collect(Collectors.toList());
out.writeShort(rulesList.size());
ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
for (ZoneRules rules : rulesList) {
baos.reset();
DataOutputStream dataos = new DataOutputStream(baos);
Ser.write(rules, dataos);
dataos.close();
byte[] bytes = baos.toByteArray();
out.writeShort(bytes.length);
out.write(bytes);
}
// link version-region-rules
out.writeShort(builtZones.size());
for (Map.Entry<String, ZoneRules> entry : builtZones.entrySet()) {
int regionIndex = Arrays.binarySearch(regionArray, entry.getKey());
int rulesIndex = rulesList.indexOf(entry.getValue());
out.writeShort(regionIndex);
out.writeShort(rulesIndex);
}
// alias-region
out.writeShort(links.size());
for (Map.Entry<String, String> entry : links.entrySet()) {
int aliasIndex = Arrays.binarySearch(regionArray, entry.getKey());
int regionIndex = Arrays.binarySearch(regionArray, entry.getValue());
out.writeShort(aliasIndex);
out.writeShort(regionIndex);
}
out.flush();
} catch (Exception ex) {
System.out.println("Failed: " + ex.toString());
ex.printStackTrace();
System.exit(1);
}
}
/** Whether to output verbose messages. */
private boolean verbose;
/**
* private contructor
*/
private TzdbZoneRulesCompiler() {}
/**
* Prints a verbose message.
*
* @param message the message, not null
*/
private void printVerbose(String message) {
if (verbose) {
System.out.println(message);
}
}
}