org.threeten.bp.zone.TzdbZoneRulesCompiler Maven / Gradle / Ivy
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/*
* Copyright (c) 2007-present, 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
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.threeten.bp.zone;
import static org.threeten.bp.temporal.ChronoField.HOUR_OF_DAY;
import static org.threeten.bp.temporal.ChronoField.MINUTE_OF_HOUR;
import static org.threeten.bp.temporal.ChronoField.SECOND_OF_MINUTE;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStream;
import java.text.ParsePosition;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.StringTokenizer;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.jar.JarOutputStream;
import java.util.zip.ZipEntry;
import org.threeten.bp.DayOfWeek;
import org.threeten.bp.LocalDate;
import org.threeten.bp.LocalDateTime;
import org.threeten.bp.LocalTime;
import org.threeten.bp.Month;
import org.threeten.bp.Year;
import org.threeten.bp.ZoneOffset;
import org.threeten.bp.format.DateTimeFormatter;
import org.threeten.bp.format.DateTimeFormatterBuilder;
import org.threeten.bp.temporal.TemporalAccessor;
import org.threeten.bp.temporal.TemporalAdjusters;
import org.threeten.bp.zone.ZoneOffsetTransitionRule.TimeDefinition;
/**
* A builder that can read the TZDB time-zone files and build {@code ZoneRules} instances.
*
* Specification for implementors
* This class is a mutable builder. A new instance must be created for each compile.
*/
final class TzdbZoneRulesCompiler {
/**
* Time parser.
*/
private static final DateTimeFormatter TIME_PARSER;
static {
TIME_PARSER = new DateTimeFormatterBuilder()
.appendValue(HOUR_OF_DAY)
.optionalStart().appendLiteral(':').appendValue(MINUTE_OF_HOUR, 2)
.optionalStart().appendLiteral(':').appendValue(SECOND_OF_MINUTE, 2)
.toFormatter();
}
/**
* Reads a set of TZDB files and builds a single combined data file.
*
* @param args the arguments
*/
public static void main(String[] args) {
if (args.length < 2) {
outputHelp();
return;
}
// parse args
String version = null;
File baseSrcDir = null;
File dstDir = null;
boolean unpacked = false;
boolean verbose = false;
// parse options
int i;
for (i = 0; i < args.length; i++) {
String arg = args[i];
if (arg.startsWith("-") == false) {
break;
}
if ("-srcdir".equals(arg)) {
if (baseSrcDir == null && ++i < args.length) {
baseSrcDir = new File(args[i]);
continue;
}
} else if ("-dstdir".equals(arg)) {
if (dstDir == null && ++i < args.length) {
dstDir = new File(args[i]);
continue;
}
} else if ("-version".equals(arg)) {
if (version == null && ++i < args.length) {
version = args[i];
continue;
}
} else if ("-unpacked".equals(arg)) {
if (unpacked == false) {
unpacked = true;
continue;
}
} else if ("-verbose".equals(arg)) {
if (verbose == false) {
verbose = true;
continue;
}
} else if ("-help".equals(arg) == false) {
System.out.println("Unrecognised option: " + arg);
}
outputHelp();
return;
}
// check source directory
if (baseSrcDir == null) {
System.out.println("Source directory must be specified using -srcdir: " + baseSrcDir);
return;
}
if (baseSrcDir.isDirectory() == false) {
System.out.println("Source does not exist or is not a directory: " + baseSrcDir);
return;
}
dstDir = (dstDir != null ? dstDir : baseSrcDir);
// parse source file names
List srcFileNames = Arrays.asList(Arrays.copyOfRange(args, i, args.length));
if (srcFileNames.isEmpty()) {
System.out.println("Source filenames not specified, using default set");
System.out.println("(africa antarctica asia australasia backward etcetera europe northamerica southamerica)");
srcFileNames = Arrays.asList("africa", "antarctica", "asia", "australasia", "backward",
"etcetera", "europe", "northamerica", "southamerica");
}
// find source directories to process
List srcDirs = new ArrayList();
if (version != null) {
File srcDir = new File(baseSrcDir, version);
if (srcDir.isDirectory() == false) {
System.out.println("Version does not represent a valid source directory : " + srcDir);
return;
}
srcDirs.add(srcDir);
} else {
File[] dirs = baseSrcDir.listFiles();
for (File dir : dirs) {
if (dir.isDirectory() && dir.getName().matches("[12][0-9][0-9][0-9][A-Za-z0-9._-]+")) {
srcDirs.add(dir);
}
}
}
if (srcDirs.isEmpty()) {
System.out.println("Source directory contains no valid source folders: " + baseSrcDir);
return;
}
// check destination directory
if (dstDir.exists() == false && dstDir.mkdirs() == false) {
System.out.println("Destination directory could not be created: " + dstDir);
return;
}
if (dstDir.isDirectory() == false) {
System.out.println("Destination is not a directory: " + dstDir);
return;
}
process(srcDirs, srcFileNames, dstDir, unpacked, verbose);
}
/**
* Output usage text for the command line.
*/
private static void outputHelp() {
System.out.println("Usage: TzdbZoneRulesCompiler ");
System.out.println("where options include:");
System.out.println(" -srcdir Where to find source directories (required)");
System.out.println(" -dstdir Where to output generated files (default srcdir)");
System.out.println(" -version Specify the version, such as 2009a (optional)");
System.out.println(" -unpacked Generate dat files without jar files");
System.out.println(" -help Print this usage message");
System.out.println(" -verbose Output verbose information during compilation");
System.out.println(" There must be one directory for each version in srcdir");
System.out.println(" Each directory must have the name of the version, such as 2009a");
System.out.println(" Each directory must contain the unpacked tzdb files, such as asia or europe");
System.out.println(" Directories must match the regex [12][0-9][0-9][0-9][A-Za-z0-9._-]+");
System.out.println(" There will be one jar file for each version and one combined jar in dstdir");
System.out.println(" If the version is specified, only that version is processed");
}
/**
* Process to create the jar files.
*/
private static void process(List srcDirs, List srcFileNames, File dstDir, boolean unpacked, boolean verbose) {
// build actual jar files
Map deduplicateMap = new HashMap();
Map> allBuiltZones = new TreeMap>();
Set allRegionIds = new TreeSet();
Set allRules = new HashSet();
SortedMap bestLeapSeconds = null;
for (File srcDir : srcDirs) {
// source files in this directory
List srcFiles = new ArrayList();
for (String srcFileName : srcFileNames) {
File file = new File(srcDir, srcFileName);
if (file.exists()) {
srcFiles.add(file);
}
}
if (srcFiles.isEmpty()) {
continue; // nothing to process
}
File leapSecondsFile = new File(srcDir, "leapseconds");
if (!leapSecondsFile.exists()) {
System.out.println("Version " + srcDir.getName() + " does not include leap seconds information.");
leapSecondsFile = null;
}
// compile
String loopVersion = srcDir.getName();
TzdbZoneRulesCompiler compiler = new TzdbZoneRulesCompiler(loopVersion, srcFiles, leapSecondsFile, verbose);
compiler.setDeduplicateMap(deduplicateMap);
try {
// compile
compiler.compile();
SortedMap builtZones = compiler.getZones();
SortedMap parsedLeapSeconds = compiler.getLeapSeconds();
// output version-specific file
if (unpacked == false) {
File dstFile = new File(dstDir, "threeten-TZDB-" + loopVersion + ".jar");
if (verbose) {
System.out.println("Outputting file: " + dstFile);
}
outputFile(dstFile, loopVersion, builtZones, parsedLeapSeconds);
}
// create totals
allBuiltZones.put(loopVersion, builtZones);
allRegionIds.addAll(builtZones.keySet());
allRules.addAll(builtZones.values());
// track best possible leap seconds collection
if (compiler.getMostRecentLeapSecond() != null) {
// we've got a live one!
if (bestLeapSeconds == null || compiler.getMostRecentLeapSecond().compareTo(bestLeapSeconds.lastKey()) > 0) {
// found the first one, or found a better one
bestLeapSeconds = parsedLeapSeconds;
}
}
} catch (Exception ex) {
System.out.println("Failed: " + ex.toString());
ex.printStackTrace();
System.exit(1);
}
}
// output merged file
if (unpacked) {
if (verbose) {
System.out.println("Outputting combined files: " + dstDir);
}
outputFilesDat(dstDir, allBuiltZones, allRegionIds, allRules, bestLeapSeconds);
} else {
File dstFile = new File(dstDir, "threeten-TZDB-all.jar");
if (verbose) {
System.out.println("Outputting combined file: " + dstFile);
}
outputFile(dstFile, allBuiltZones, allRegionIds, allRules, bestLeapSeconds);
}
}
/**
* Outputs the DAT files.
*/
private static void outputFilesDat(File dstDir, Map> allBuiltZones,
Set allRegionIds, Set allRules, SortedMap leapSeconds) {
File tzdbFile = new File(dstDir, "TZDB.dat");
tzdbFile.delete();
try {
FileOutputStream fos = null;
try {
fos = new FileOutputStream(tzdbFile);
outputTzdbDat(fos, allBuiltZones, allRegionIds, allRules);
} finally {
if (fos != null) {
fos.close();
}
}
} catch (Exception ex) {
System.out.println("Failed: " + ex.toString());
ex.printStackTrace();
System.exit(1);
}
}
/**
* Outputs the file.
*/
private static void outputFile(File dstFile, String version, SortedMap builtZones, SortedMap leapSeconds) {
Map> loopAllBuiltZones = new TreeMap>();
loopAllBuiltZones.put(version, builtZones);
Set loopAllRegionIds = new TreeSet(builtZones.keySet());
Set loopAllRules = new HashSet(builtZones.values());
outputFile(dstFile, loopAllBuiltZones, loopAllRegionIds, loopAllRules, leapSeconds);
}
/**
* Outputs the file.
*/
private static void outputFile(File dstFile, Map> allBuiltZones,
Set allRegionIds, Set allRules, SortedMap leapSeconds) {
JarOutputStream jos = null;
try {
jos = new JarOutputStream(new FileOutputStream(dstFile));
outputTzdbEntry(jos, allBuiltZones, allRegionIds, allRules);
} catch (Exception ex) {
System.out.println("Failed: " + ex.toString());
ex.printStackTrace();
System.exit(1);
} finally {
if (jos != null) {
try {
jos.close();
} catch (IOException ex) {
// ignore
}
}
}
}
/**
* Outputs the timezone entry in the JAR file.
*/
private static void outputTzdbEntry(
JarOutputStream jos, Map> allBuiltZones,
Set allRegionIds, Set allRules) {
// this format is not publicly specified
try {
jos.putNextEntry(new ZipEntry("org/threeten/bp/TZDB.dat"));
outputTzdbDat(jos, allBuiltZones, allRegionIds, allRules);
jos.closeEntry();
} catch (Exception ex) {
System.out.println("Failed: " + ex.toString());
ex.printStackTrace();
System.exit(1);
}
}
/**
* Outputs the timezone DAT file.
*/
private static void outputTzdbDat(OutputStream jos,
Map> allBuiltZones,
Set allRegionIds, Set allRules) throws IOException {
DataOutputStream out = new DataOutputStream(jos);
// file version
out.writeByte(1);
// group
out.writeUTF("TZDB");
// versions
String[] versionArray = allBuiltZones.keySet().toArray(new String[allBuiltZones.size()]);
out.writeShort(versionArray.length);
for (String version : versionArray) {
out.writeUTF(version);
}
// regions
String[] regionArray = allRegionIds.toArray(new String[allRegionIds.size()]);
out.writeShort(regionArray.length);
for (String regionId : regionArray) {
out.writeUTF(regionId);
}
// rules
List rulesList = new ArrayList(allRules);
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
for (String version : allBuiltZones.keySet()) {
out.writeShort(allBuiltZones.get(version).size());
for (Map.Entry entry : allBuiltZones.get(version).entrySet()) {
int regionIndex = Arrays.binarySearch(regionArray, entry.getKey());
int rulesIndex = rulesList.indexOf(entry.getValue());
out.writeShort(regionIndex);
out.writeShort(rulesIndex);
}
}
out.flush();
}
//-----------------------------------------------------------------------
/** The TZDB rules. */
private final Map> rules = new HashMap>();
/** The TZDB zones. */
private final Map> zones = new HashMap>();
/** The TZDB links. */
private final Map links = new HashMap();
/** The built zones. */
private final SortedMap builtZones = new TreeMap();
/** A map to deduplicate object instances. */
private Map deduplicateMap = new HashMap();
/** Sorted collection of LeapSecondRules. */
private final SortedMap leapSeconds = new TreeMap();
/** The version to produce. */
private final String version;
/** The source files. */
private final List sourceFiles;
/** The leap seconds file. */
private final File leapSecondsFile;
/** The version to produce. */
private final boolean verbose;
/**
* Creates an instance if you want to invoke the compiler manually.
*
* @param version the version, such as 2009a, not null
* @param sourceFiles the list of source files, not empty, not null
* @param verbose whether to output verbose messages
*/
public TzdbZoneRulesCompiler(String version, List sourceFiles, File leapSecondsFile, boolean verbose) {
this.version = version;
this.sourceFiles = sourceFiles;
this.leapSecondsFile = leapSecondsFile;
this.verbose = verbose;
}
/**
* Compile the rules file.
*
* Use {@link #getZones()} and {@link #getLeapSeconds()} to retrieve the parsed data.
*
* @throws Exception if an error occurs
*/
public void compile() throws Exception {
printVerbose("Compiling TZDB version " + version);
parseFiles();
parseLeapSecondsFile();
buildZoneRules();
printVerbose("Compiled TZDB version " + version);
}
/**
* Gets the parsed zone rules.
*
* @return the parsed zone rules, not null
*/
public SortedMap getZones() {
return builtZones;
}
/**
* Gets the parsed leap seconds.
*
* @return the parsed and sorted leap seconds, not null
*/
public SortedMap getLeapSeconds() {
return leapSeconds;
}
/**
* Gets the most recent leap second.
*
* @return the most recent leap second, null if none
*/
private LocalDate getMostRecentLeapSecond() {
return leapSeconds.isEmpty() ? null : leapSeconds.lastKey();
}
/**
* Sets the deduplication map.
*
* @param deduplicateMap the map to deduplicate items
*/
void setDeduplicateMap(Map deduplicateMap) {
this.deduplicateMap = deduplicateMap;
}
//-----------------------------------------------------------------------
/**
* Parses the source files.
*
* @throws Exception if an error occurs
*/
private void parseFiles() throws Exception {
for (File file : sourceFiles) {
printVerbose("Parsing file: " + file);
parseFile(file);
}
}
/**
* Parses the leap seconds file.
*
* @throws Exception if an error occurs
*/
private void parseLeapSecondsFile() throws Exception {
printVerbose("Parsing leap second file: " + leapSecondsFile);
int lineNumber = 1;
String line = null;
BufferedReader in = null;
try {
in = new BufferedReader(new FileReader(leapSecondsFile));
for ( ; (line = in.readLine()) != null; lineNumber++) {
int index = line.indexOf('#'); // remove comments (doesn't handle # in quotes)
if (index >= 0) {
line = line.substring(0, index);
}
if (line.trim().length() == 0) { // ignore blank lines
continue;
}
LeapSecondRule secondRule = parseLeapSecondRule(line);
leapSeconds.put(secondRule.leapDate, secondRule.secondAdjustment);
}
} catch (Exception ex) {
throw new Exception("Failed while processing file '" + leapSecondsFile + "' on line " + lineNumber + " '" + line + "'", ex);
} finally {
try {
if (in != null) {
in.close();
}
} catch (Exception ex) {
// ignore NPE and IOE
}
}
}
private LeapSecondRule parseLeapSecondRule(String line) {
// # Leap YEAR MONTH DAY HH:MM:SS CORR R/S
// Leap 1972 Jun 30 23:59:60 + S
// Leap 1972 Dec 31 23:59:60 + S
// Leap 1973 Dec 31 23:59:60 + S
// Leap 1974 Dec 31 23:59:60 + S
// Leap 1975 Dec 31 23:59:60 + S
// Leap 1976 Dec 31 23:59:60 + S
// Leap 1977 Dec 31 23:59:60 + S
// Leap 1978 Dec 31 23:59:60 + S
// Leap 1979 Dec 31 23:59:60 + S
// Leap 1981 Jun 30 23:59:60 + S
// Leap 1982 Jun 30 23:59:60 + S
// Leap 1983 Jun 30 23:59:60 + S
StringTokenizer st = new StringTokenizer(line, " \t");
String first = st.nextToken();
if (first.equals("Leap")) {
if (st.countTokens() < 6) {
printVerbose("Invalid leap second line in file: " + leapSecondsFile + ", line: " + line);
throw new IllegalArgumentException("Invalid leap second line");
}
} else {
throw new IllegalArgumentException("Unknown line");
}
int year = Integer.parseInt(st.nextToken());
Month month = parseMonth(st.nextToken());
int dayOfMonth = Integer.parseInt(st.nextToken());
LocalDate leapDate = LocalDate.of(year, month, dayOfMonth);
String timeOfLeapSecond = st.nextToken();
byte adjustmentByte = 0;
String adjustment = st.nextToken();
if (adjustment.equals("+")) {
if (!("23:59:60".equals(timeOfLeapSecond))) {
throw new IllegalArgumentException("Leap seconds can only be inserted at 23:59:60 - Date:" + leapDate);
}
adjustmentByte = +1;
} else if (adjustment.equals("-")) {
if (!("23:59:59".equals(timeOfLeapSecond))) {
throw new IllegalArgumentException("Leap seconds can only be removed at 23:59:59 - Date:" + leapDate);
}
adjustmentByte = -1;
} else {
throw new IllegalArgumentException("Invalid adjustment '" + adjustment + "' in leap second rule for " + leapDate);
}
String rollingOrStationary = st.nextToken();
if (!"S".equalsIgnoreCase(rollingOrStationary)) {
throw new IllegalArgumentException("Only stationary ('S') leap seconds are supported, not '" + rollingOrStationary + "'");
}
return new LeapSecondRule(leapDate, adjustmentByte);
}
/**
* Parses a source file.
*
* @param file the file being read, not null
* @throws Exception if an error occurs
*/
private void parseFile(File file) throws Exception {
int lineNumber = 1;
String line = null;
BufferedReader in = null;
try {
in = new BufferedReader(new FileReader(file));
List openZone = null;
for ( ; (line = in.readLine()) != null; lineNumber++) {
int index = line.indexOf('#'); // remove comments (doesn't handle # in quotes)
if (index >= 0) {
line = line.substring(0, index);
}
if (line.trim().length() == 0) { // ignore blank lines
continue;
}
StringTokenizer st = new StringTokenizer(line, " \t");
if (openZone != null && Character.isWhitespace(line.charAt(0)) && st.hasMoreTokens()) {
if (parseZoneLine(st, openZone)) {
openZone = null;
}
} else {
if (st.hasMoreTokens()) {
String first = st.nextToken();
if (first.equals("Zone")) {
if (st.countTokens() < 3) {
printVerbose("Invalid Zone line in file: " + file + ", line: " + line);
throw new IllegalArgumentException("Invalid Zone line");
}
openZone = new ArrayList();
zones.put(st.nextToken(), openZone);
if (parseZoneLine(st, openZone)) {
openZone = null;
}
} else {
openZone = null;
if (first.equals("Rule")) {
if (st.countTokens() < 9) {
printVerbose("Invalid Rule line in file: " + file + ", line: " + line);
throw new IllegalArgumentException("Invalid Rule line");
}
parseRuleLine(st);
} else if (first.equals("Link")) {
if (st.countTokens() < 2) {
printVerbose("Invalid Link line in file: " + file + ", line: " + line);
throw new IllegalArgumentException("Invalid Link line");
}
String realId = st.nextToken();
String aliasId = st.nextToken();
links.put(aliasId, realId);
} else {
throw new IllegalArgumentException("Unknown line");
}
}
}
}
}
} catch (Exception ex) {
throw new Exception("Failed while processing file '" + file + "' on line " + lineNumber + " '" + line + "'", ex);
} finally {
if (in != null) {
in.close();
}
}
}
/**
* Parses a Rule line.
*
* @param st the tokenizer, not null
*/
private void parseRuleLine(StringTokenizer st) {
TZDBRule rule = new TZDBRule();
String name = st.nextToken();
if (rules.containsKey(name) == false) {
rules.put(name, new ArrayList());
}
rules.get(name).add(rule);
rule.startYear = parseYear(st.nextToken(), 0);
rule.endYear = parseYear(st.nextToken(), rule.startYear);
if (rule.startYear > rule.endYear) {
throw new IllegalArgumentException("Year order invalid: " + rule.startYear + " > " + rule.endYear);
}
parseOptional(st.nextToken()); // type is unused
parseMonthDayTime(st, rule);
rule.savingsAmount = parsePeriod(st.nextToken());
rule.text = parseOptional(st.nextToken());
}
/**
* Parses a Zone line.
*
* @param st the tokenizer, not null
* @return true if the zone is complete
*/
private boolean parseZoneLine(StringTokenizer st, List zoneList) {
TZDBZone zone = new TZDBZone();
zoneList.add(zone);
zone.standardOffset = parseOffset(st.nextToken());
String savingsRule = parseOptional(st.nextToken());
if (savingsRule == null) {
zone.fixedSavingsSecs = 0;
zone.savingsRule = null;
} else {
try {
zone.fixedSavingsSecs = parsePeriod(savingsRule);
zone.savingsRule = null;
} catch (Exception ex) {
zone.fixedSavingsSecs = null;
zone.savingsRule = savingsRule;
}
}
zone.text = st.nextToken();
if (st.hasMoreTokens()) {
zone.year = Year.of(Integer.parseInt(st.nextToken()));
if (st.hasMoreTokens()) {
parseMonthDayTime(st, zone);
}
return false;
} else {
return true;
}
}
/**
* Parses a Rule line.
*
* @param st the tokenizer, not null
* @param mdt the object to parse into, not null
*/
private void parseMonthDayTime(StringTokenizer st, TZDBMonthDayTime mdt) {
mdt.month = parseMonth(st.nextToken());
if (st.hasMoreTokens()) {
String dayRule = st.nextToken();
if (dayRule.startsWith("last")) {
mdt.dayOfMonth = -1;
mdt.dayOfWeek = parseDayOfWeek(dayRule.substring(4));
mdt.adjustForwards = false;
} else {
int index = dayRule.indexOf(">=");
if (index > 0) {
mdt.dayOfWeek = parseDayOfWeek(dayRule.substring(0, index));
dayRule = dayRule.substring(index + 2);
} else {
index = dayRule.indexOf("<=");
if (index > 0) {
mdt.dayOfWeek = parseDayOfWeek(dayRule.substring(0, index));
mdt.adjustForwards = false;
dayRule = dayRule.substring(index + 2);
}
}
mdt.dayOfMonth = Integer.parseInt(dayRule);
}
if (st.hasMoreTokens()) {
String timeStr = st.nextToken();
int secsOfDay = parseSecs(timeStr);
if (secsOfDay == 86400) {
mdt.endOfDay = true;
secsOfDay = 0;
}
LocalTime time = deduplicate(LocalTime.ofSecondOfDay(secsOfDay));
mdt.time = time;
mdt.timeDefinition = parseTimeDefinition(timeStr.charAt(timeStr.length() - 1));
}
}
}
private int parseYear(String str, int defaultYear) {
str = str.toLowerCase();
if (matches(str, "minimum")) {
return Year.MIN_VALUE;
} else if (matches(str, "maximum")) {
return Year.MAX_VALUE;
} else if (str.equals("only")) {
return defaultYear;
}
return Integer.parseInt(str);
}
private Month parseMonth(String str) {
str = str.toLowerCase();
for (Month moy : Month.values()) {
if (matches(str, moy.name().toLowerCase())) {
return moy;
}
}
throw new IllegalArgumentException("Unknown month: " + str);
}
private DayOfWeek parseDayOfWeek(String str) {
str = str.toLowerCase();
for (DayOfWeek dow : DayOfWeek.values()) {
if (matches(str, dow.name().toLowerCase())) {
return dow;
}
}
throw new IllegalArgumentException("Unknown day-of-week: " + str);
}
private boolean matches(String str, String search) {
return str.startsWith(search.substring(0, 3)) && search.startsWith(str) && str.length() <= search.length();
}
private String parseOptional(String str) {
return str.equals("-") ? null : str;
}
private int parseSecs(String str) {
if (str.equals("-")) {
return 0;
}
int pos = 0;
if (str.startsWith("-")) {
pos = 1;
}
ParsePosition pp = new ParsePosition(pos);
TemporalAccessor parsed = TIME_PARSER.parseUnresolved(str, pp);
if (parsed == null || pp.getErrorIndex() >= 0) {
throw new IllegalArgumentException(str);
}
long hour = parsed.getLong(HOUR_OF_DAY);
Long min = (parsed.isSupported(MINUTE_OF_HOUR) ? parsed.getLong(MINUTE_OF_HOUR) : null);
Long sec = (parsed.isSupported(SECOND_OF_MINUTE) ? parsed.getLong(SECOND_OF_MINUTE) : null);
int secs = (int) (hour * 60 * 60 + (min != null ? min : 0) * 60 + (sec != null ? sec : 0));
if (pos == 1) {
secs = -secs;
}
return secs;
}
private ZoneOffset parseOffset(String str) {
int secs = parseSecs(str);
return ZoneOffset.ofTotalSeconds(secs);
}
private int parsePeriod(String str) {
return parseSecs(str);
}
private TimeDefinition parseTimeDefinition(char c) {
switch (c) {
case 's':
case 'S':
// standard time
return TimeDefinition.STANDARD;
case 'u':
case 'U':
case 'g':
case 'G':
case 'z':
case 'Z':
// UTC
return TimeDefinition.UTC;
case 'w':
case 'W':
default:
// wall time
return TimeDefinition.WALL;
}
}
//-----------------------------------------------------------------------
/**
* Build the rules, zones and links into real zones.
*
* @throws Exception if an error occurs
*/
private void buildZoneRules() throws Exception {
// build zones
for (String zoneId : zones.keySet()) {
printVerbose("Building zone " + zoneId);
zoneId = deduplicate(zoneId);
List tzdbZones = zones.get(zoneId);
ZoneRulesBuilder bld = new ZoneRulesBuilder();
for (TZDBZone tzdbZone : tzdbZones) {
bld = tzdbZone.addToBuilder(bld, rules);
}
ZoneRules buildRules = bld.toRules(zoneId, deduplicateMap);
builtZones.put(zoneId, deduplicate(buildRules));
}
// build aliases
for (String aliasId : links.keySet()) {
aliasId = deduplicate(aliasId);
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 + "' for '" + version + "'");
}
}
builtZones.put(aliasId, realRules);
}
// remove UTC and GMT
builtZones.remove("UTC");
builtZones.remove("GMT");
builtZones.remove("GMT0");
builtZones.remove("GMT+0");
builtZones.remove("GMT-0");
}
//-----------------------------------------------------------------------
/**
* Deduplicates an object instance.
*
* @param the generic type
* @param object the object to deduplicate
* @return the deduplicated object
*/
@SuppressWarnings("unchecked")
T deduplicate(T object) {
if (deduplicateMap.containsKey(object) == false) {
deduplicateMap.put(object, object);
}
return (T) deduplicateMap.get(object);
}
//-----------------------------------------------------------------------
/**
* Prints a verbose message.
*
* @param message the message, not null
*/
private void printVerbose(String message) {
if (verbose) {
System.out.println(message);
}
}
//-----------------------------------------------------------------------
/**
* Class representing a month-day-time in the TZDB file.
*/
abstract class TZDBMonthDayTime {
/** The month of the cutover. */
Month month = Month.JANUARY;
/** The day-of-month of the cutover. */
int dayOfMonth = 1;
/** Whether to adjust forwards. */
boolean adjustForwards = true;
/** The day-of-week of the cutover. */
DayOfWeek dayOfWeek;
/** The time of the cutover. */
LocalTime time = LocalTime.MIDNIGHT;
/** Whether this is midnight end of day. */
boolean endOfDay;
/** The time of the cutover. */
TimeDefinition timeDefinition = TimeDefinition.WALL;
void adjustToFowards(int year) {
if (adjustForwards == false && dayOfMonth > 0) {
LocalDate adjustedDate = LocalDate.of(year, month, dayOfMonth).minusDays(6);
dayOfMonth = adjustedDate.getDayOfMonth();
month = adjustedDate.getMonth();
adjustForwards = true;
}
}
}
//-----------------------------------------------------------------------
/**
* Class representing a rule line in the TZDB file.
*/
final class TZDBRule extends TZDBMonthDayTime {
/** The start year. */
int startYear;
/** The end year. */
int endYear;
/** The amount of savings. */
int savingsAmount;
/** The text name of the zone. */
String text;
void addToBuilder(ZoneRulesBuilder bld) {
adjustToFowards(2004); // irrelevant, treat as leap year
bld.addRuleToWindow(startYear, endYear, month, dayOfMonth, dayOfWeek, time, endOfDay, timeDefinition, savingsAmount);
}
}
//-----------------------------------------------------------------------
/**
* Class representing a linked set of zone lines in the TZDB file.
*/
final class TZDBZone extends TZDBMonthDayTime {
/** The standard offset. */
ZoneOffset standardOffset;
/** The fixed savings amount. */
Integer fixedSavingsSecs;
/** The savings rule. */
String savingsRule;
/** The text name of the zone. */
String text;
/** The year of the cutover. */
Year year;
ZoneRulesBuilder addToBuilder(ZoneRulesBuilder bld, Map> rules) {
if (year != null) {
bld.addWindow(standardOffset, toDateTime(year.getValue()), timeDefinition);
} else {
bld.addWindowForever(standardOffset);
}
if (fixedSavingsSecs != null) {
bld.setFixedSavingsToWindow(fixedSavingsSecs);
} else {
List tzdbRules = rules.get(savingsRule);
if (tzdbRules == null) {
throw new IllegalArgumentException("Rule not found: " + savingsRule);
}
for (TZDBRule tzdbRule : tzdbRules) {
tzdbRule.addToBuilder(bld);
}
}
return bld;
}
private LocalDateTime toDateTime(int year) {
adjustToFowards(year);
LocalDate date;
if (dayOfMonth == -1) {
dayOfMonth = month.length(Year.isLeap(year));
date = LocalDate.of(year, month, dayOfMonth);
if (dayOfWeek != null) {
date = date.with(TemporalAdjusters.previousOrSame(dayOfWeek));
}
} else {
date = LocalDate.of(year, month, dayOfMonth);
if (dayOfWeek != null) {
date = date.with(TemporalAdjusters.nextOrSame(dayOfWeek));
}
}
date = deduplicate(date);
LocalDateTime ldt = LocalDateTime.of(date, time);
if (endOfDay) {
ldt = ldt.plusDays(1);
}
return ldt;
}
}
//-----------------------------------------------------------------------
/**
* Class representing a rule line in the TZDB file.
*/
static final class LeapSecondRule {
/**
* Constructs a rule using fields.
* @param leapDate Date which has gets leap second adjustment (at the end)
* @param secondAdjustment +1 or -1 for inserting or dropping a second
*/
public LeapSecondRule(LocalDate leapDate, byte secondAdjustment) {
this.leapDate = leapDate;
this.secondAdjustment = secondAdjustment;
}
/** The date of the leap second. */
final LocalDate leapDate;
/** The adjustment (in seconds), +1 means a second is inserted,
* -1 means a second is dropped. */
byte secondAdjustment;
}
}