1.1 --- a/src/net/fortuna/ical4j/model/TimeZoneRegistryImpl.java Thu Feb 12 18:02:00 2015 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,225 +0,0 @@
1.4 -/**
1.5 - * Copyright (c) 2012, Ben Fortuna
1.6 - * All rights reserved.
1.7 - *
1.8 - * Redistribution and use in source and binary forms, with or without
1.9 - * modification, are permitted provided that the following conditions
1.10 - * are met:
1.11 - *
1.12 - * o Redistributions of source code must retain the above copyright
1.13 - * notice, this list of conditions and the following disclaimer.
1.14 - *
1.15 - * o Redistributions in binary form must reproduce the above copyright
1.16 - * notice, this list of conditions and the following disclaimer in the
1.17 - * documentation and/or other materials provided with the distribution.
1.18 - *
1.19 - * o Neither the name of Ben Fortuna nor the names of any other contributors
1.20 - * may be used to endorse or promote products derived from this software
1.21 - * without specific prior written permission.
1.22 - *
1.23 - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.24 - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.25 - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.26 - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.27 - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.28 - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.29 - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.30 - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.31 - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.32 - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.33 - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.34 - */
1.35 -package net.fortuna.ical4j.model;
1.36 -
1.37 -import java.io.IOException;
1.38 -import java.net.URL;
1.39 -import java.util.Map;
1.40 -import java.util.Properties;
1.41 -import java.util.regex.Matcher;
1.42 -import java.util.regex.Pattern;
1.43 -
1.44 -import net.fortuna.ical4j.data.CalendarBuilder;
1.45 -import net.fortuna.ical4j.data.ParserException;
1.46 -import net.fortuna.ical4j.model.component.VTimeZone;
1.47 -import net.fortuna.ical4j.model.property.TzUrl;
1.48 -import net.fortuna.ical4j.util.CompatibilityHints;
1.49 -import net.fortuna.ical4j.util.Configurator;
1.50 -import net.fortuna.ical4j.util.ResourceLoader;
1.51 -
1.52 -import org.apache.commons.logging.Log;
1.53 -import org.apache.commons.logging.LogFactory;
1.54 -
1.55 -import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap;
1.56 -
1.57 -/**
1.58 - * $Id$
1.59 - *
1.60 - * Created on 18/09/2005
1.61 - *
1.62 - * The default implementation of a <code>TimeZoneRegistry</code>. This implementation will search the classpath for
1.63 - * applicable VTimeZone definitions used to back the provided TimeZone instances.
1.64 - * @author Ben Fortuna
1.65 - */
1.66 -public class TimeZoneRegistryImpl implements TimeZoneRegistry {
1.67 -
1.68 - private static final String DEFAULT_RESOURCE_PREFIX = "zoneinfo/";
1.69 -
1.70 - private static final Pattern TZ_ID_SUFFIX = Pattern.compile("(?<=/)[^/]*/[^/]*$");
1.71 -
1.72 - private static final String UPDATE_ENABLED = "net.fortuna.ical4j.timezone.update.enabled";
1.73 -
1.74 - private static final Map DEFAULT_TIMEZONES = new ConcurrentHashMap();
1.75 -
1.76 - private static final Properties ALIASES = new Properties();
1.77 - static {
1.78 - try {
1.79 - ALIASES.load(ResourceLoader.getResourceAsStream("tz.alias"));
1.80 - }
1.81 - catch (IOException ioe) {
1.82 - LogFactory.getLog(TimeZoneRegistryImpl.class).warn(
1.83 - "Error loading timezone aliases: " + ioe.getMessage());
1.84 - }
1.85 - try {
1.86 - ALIASES.load(ResourceLoader.getResourceAsStream("/tz.alias"));
1.87 - }
1.88 - catch (Exception e) {
1.89 - LogFactory.getLog(TimeZoneRegistryImpl.class).debug(
1.90 - "Error loading custom timezone aliases: " + e.getMessage());
1.91 - }
1.92 - }
1.93 -
1.94 - private Map timezones;
1.95 -
1.96 - private String resourcePrefix;
1.97 -
1.98 - /**
1.99 - * Default constructor.
1.100 - */
1.101 - public TimeZoneRegistryImpl() {
1.102 - this(DEFAULT_RESOURCE_PREFIX);
1.103 - }
1.104 -
1.105 - /**
1.106 - * Creates a new instance using the specified resource prefix.
1.107 - * @param resourcePrefix a prefix prepended to classpath resource lookups for default timezones
1.108 - */
1.109 - public TimeZoneRegistryImpl(final String resourcePrefix) {
1.110 - this.resourcePrefix = resourcePrefix;
1.111 - timezones = new ConcurrentHashMap();
1.112 - }
1.113 -
1.114 - /**
1.115 - * {@inheritDoc}
1.116 - */
1.117 - public final void register(final TimeZone timezone) {
1.118 - // for now we only apply updates to included definitions by default..
1.119 - register(timezone, false);
1.120 - }
1.121 -
1.122 - /**
1.123 - * {@inheritDoc}
1.124 - */
1.125 - public final void register(final TimeZone timezone, boolean update) {
1.126 - if (update) {
1.127 - // load any available updates for the timezone..
1.128 - timezones.put(timezone.getID(), new TimeZone(updateDefinition(timezone.getVTimeZone())));
1.129 - }
1.130 - else {
1.131 - timezones.put(timezone.getID(), timezone);
1.132 - }
1.133 - }
1.134 -
1.135 - /**
1.136 - * {@inheritDoc}
1.137 - */
1.138 - public final void clear() {
1.139 - timezones.clear();
1.140 - }
1.141 -
1.142 - /**
1.143 - * {@inheritDoc}
1.144 - */
1.145 - public final TimeZone getTimeZone(final String id) {
1.146 - TimeZone timezone = (TimeZone) timezones.get(id);
1.147 - if (timezone == null) {
1.148 - timezone = (TimeZone) DEFAULT_TIMEZONES.get(id);
1.149 - if (timezone == null) {
1.150 - // if timezone not found with identifier, try loading an alias..
1.151 - final String alias = ALIASES.getProperty(id);
1.152 - if (alias != null) {
1.153 - return getTimeZone(alias);
1.154 - }
1.155 - else {
1.156 - synchronized (DEFAULT_TIMEZONES) {
1.157 - // check again as it may be loaded now..
1.158 - timezone = (TimeZone) DEFAULT_TIMEZONES.get(id);
1.159 - if (timezone == null) {
1.160 - try {
1.161 - final VTimeZone vTimeZone = loadVTimeZone(id);
1.162 - if (vTimeZone != null) {
1.163 - // XXX: temporary kludge..
1.164 - // ((TzId) vTimeZone.getProperties().getProperty(Property.TZID)).setValue(id);
1.165 - timezone = new TimeZone(vTimeZone);
1.166 - DEFAULT_TIMEZONES.put(timezone.getID(), timezone);
1.167 - }
1.168 - else if (CompatibilityHints.isHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING)) {
1.169 - // strip global part of id and match on default tz..
1.170 - Matcher matcher = TZ_ID_SUFFIX.matcher(id);
1.171 - if (matcher.find()) {
1.172 - return getTimeZone(matcher.group());
1.173 - }
1.174 - }
1.175 - }
1.176 - catch (Exception e) {
1.177 - Log log = LogFactory.getLog(TimeZoneRegistryImpl.class);
1.178 - log.warn("Error occurred loading VTimeZone", e);
1.179 - }
1.180 - }
1.181 - }
1.182 - }
1.183 - }
1.184 - }
1.185 - return timezone;
1.186 - }
1.187 -
1.188 - /**
1.189 - * Loads an existing VTimeZone from the classpath corresponding to the specified Java timezone.
1.190 - */
1.191 - private VTimeZone loadVTimeZone(final String id) throws IOException, ParserException {
1.192 - final URL resource = ResourceLoader.getResource(resourcePrefix + id + ".ics");
1.193 - if (resource != null) {
1.194 - final CalendarBuilder builder = new CalendarBuilder();
1.195 - final Calendar calendar = builder.build(resource.openStream());
1.196 - final VTimeZone vTimeZone = (VTimeZone) calendar.getComponent(Component.VTIMEZONE);
1.197 - // load any available updates for the timezone.. can be explicility disabled via configuration
1.198 - if (!"false".equals(Configurator.getProperty(UPDATE_ENABLED))) {
1.199 - return updateDefinition(vTimeZone);
1.200 - }
1.201 - return vTimeZone;
1.202 - }
1.203 - return null;
1.204 - }
1.205 -
1.206 - /**
1.207 - * @param vTimeZone
1.208 - * @return
1.209 - */
1.210 - private VTimeZone updateDefinition(VTimeZone vTimeZone) {
1.211 - final TzUrl tzUrl = vTimeZone.getTimeZoneUrl();
1.212 - if (tzUrl != null) {
1.213 - try {
1.214 - final CalendarBuilder builder = new CalendarBuilder();
1.215 - final Calendar calendar = builder.build(tzUrl.getUri().toURL().openStream());
1.216 - final VTimeZone updatedVTimeZone = (VTimeZone) calendar.getComponent(Component.VTIMEZONE);
1.217 - if (updatedVTimeZone != null) {
1.218 - return updatedVTimeZone;
1.219 - }
1.220 - }
1.221 - catch (Exception e) {
1.222 - Log log = LogFactory.getLog(TimeZoneRegistryImpl.class);
1.223 - log.warn("Unable to retrieve updates for timezone: " + vTimeZone.getTimeZoneId().getValue(), e);
1.224 - }
1.225 - }
1.226 - return vTimeZone;
1.227 - }
1.228 -}
