| /* |
| * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * 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, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * 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 |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package java.time.zone; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.BufferedInputStream; |
| import java.io.DataInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.StreamCorruptedException; |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.NavigableMap; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.TreeMap; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * Loads time-zone rules for 'TZDB'. |
| * |
| * @since 1.8 |
| */ |
| final class TzdbZoneRulesProvider extends ZoneRulesProvider { |
| |
| /** |
| * All the regions that are available. |
| */ |
| private List<String> regionIds; |
| /** |
| * Version Id of this tzdb rules |
| */ |
| private String versionId; |
| /** |
| * Region to rules mapping |
| */ |
| private final Map<String, Object> regionToRules = new ConcurrentHashMap<>(); |
| |
| /** |
| * Creates an instance. |
| * Created by the {@code ServiceLoader}. |
| * |
| * @throws ZoneRulesException if unable to load |
| */ |
| public TzdbZoneRulesProvider() { |
| try { |
| String libDir = System.getProperty("java.home") + File.separator + "lib"; |
| try (DataInputStream dis = new DataInputStream( |
| new BufferedInputStream(new FileInputStream( |
| new File(libDir, "tzdb.dat"))))) { |
| load(dis); |
| } |
| } catch (Exception ex) { |
| throw new ZoneRulesException("Unable to load TZDB time-zone rules", ex); |
| } |
| } |
| |
| @Override |
| protected Set<String> provideZoneIds() { |
| return new HashSet<>(regionIds); |
| } |
| |
| @Override |
| protected ZoneRules provideRules(String zoneId, boolean forCaching) { |
| // forCaching flag is ignored because this is not a dynamic provider |
| Object obj = regionToRules.get(zoneId); |
| if (obj == null) { |
| throw new ZoneRulesException("Unknown time-zone ID: " + zoneId); |
| } |
| try { |
| if (obj instanceof byte[]) { |
| byte[] bytes = (byte[]) obj; |
| DataInputStream dis = new DataInputStream(new ByteArrayInputStream(bytes)); |
| obj = Ser.read(dis); |
| regionToRules.put(zoneId, obj); |
| } |
| return (ZoneRules) obj; |
| } catch (Exception ex) { |
| throw new ZoneRulesException("Invalid binary time-zone data: TZDB:" + zoneId + ", version: " + versionId, ex); |
| } |
| } |
| |
| @Override |
| protected NavigableMap<String, ZoneRules> provideVersions(String zoneId) { |
| TreeMap<String, ZoneRules> map = new TreeMap<>(); |
| ZoneRules rules = getRules(zoneId, false); |
| if (rules != null) { |
| map.put(versionId, rules); |
| } |
| return map; |
| } |
| |
| /** |
| * Loads the rules from a DateInputStream, often in a jar file. |
| * |
| * @param dis the DateInputStream to load, not null |
| * @throws Exception if an error occurs |
| */ |
| private void load(DataInputStream dis) throws Exception { |
| if (dis.readByte() != 1) { |
| throw new StreamCorruptedException("File format not recognised"); |
| } |
| // group |
| String groupId = dis.readUTF(); |
| if ("TZDB".equals(groupId) == false) { |
| throw new StreamCorruptedException("File format not recognised"); |
| } |
| // versions |
| int versionCount = dis.readShort(); |
| for (int i = 0; i < versionCount; i++) { |
| versionId = dis.readUTF(); |
| } |
| // regions |
| int regionCount = dis.readShort(); |
| String[] regionArray = new String[regionCount]; |
| for (int i = 0; i < regionCount; i++) { |
| regionArray[i] = dis.readUTF(); |
| } |
| regionIds = Arrays.asList(regionArray); |
| // rules |
| int ruleCount = dis.readShort(); |
| Object[] ruleArray = new Object[ruleCount]; |
| for (int i = 0; i < ruleCount; i++) { |
| byte[] bytes = new byte[dis.readShort()]; |
| dis.readFully(bytes); |
| ruleArray[i] = bytes; |
| } |
| // link version-region-rules |
| for (int i = 0; i < versionCount; i++) { |
| int versionRegionCount = dis.readShort(); |
| regionToRules.clear(); |
| for (int j = 0; j < versionRegionCount; j++) { |
| String region = regionArray[dis.readShort()]; |
| Object rule = ruleArray[dis.readShort() & 0xffff]; |
| regionToRules.put(region, rule); |
| } |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "TZDB[" + versionId + "]"; |
| } |
| } |