Caldavsync Sources: comparison hack/model/TimeZoneRegistryImpl.java

--1:000000000000
+:4e7abb6f1bfd
+/**
+* Copyright (c) 2012, Ben Fortuna
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+*
+*  o Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+*
+*  o 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.
+*
+*  o Neither the name of Ben Fortuna nor the names of any other 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 net.fortuna.ical4j.model;
+import java.io.IOException;
+import java.net.URL;
+import java.util.Map;
+import java.util.Properties;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import net.fortuna.ical4j.data.CalendarBuilder;
+import net.fortuna.ical4j.data.ParserException;
+import net.fortuna.ical4j.model.component.VTimeZone;
+import net.fortuna.ical4j.model.property.TzUrl;
+import net.fortuna.ical4j.util.CompatibilityHints;
+import net.fortuna.ical4j.util.Configurator;
+import net.fortuna.ical4j.util.ResourceLoader;
+import android.util.Log;
+import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap;
+/**
+* $Id$
+*
+* Created on 18/09/2005
+*
+* The default implementation of a <code>TimeZoneRegistry</code>. This implementation will search the classpath for
+* applicable VTimeZone definitions used to back the provided TimeZone instances.
+* @author Ben Fortuna
+*/
+public class TimeZoneRegistryImpl implements TimeZoneRegistry {
+private static final String DEFAULT_RESOURCE_PREFIX = "zoneinfo/";
+private static final Pattern TZ_ID_SUFFIX = Pattern.compile("(?<=/)[^/]*/[^/]*$");
+private static final String UPDATE_ENABLED = "net.fortuna.ical4j.timezone.update.enabled";
+private static final Map DEFAULT_TIMEZONES = new ConcurrentHashMap();
+private static final Properties ALIASES = new Properties();
+static {
+try {
+ALIASES.load(ResourceLoader.getResourceAsStream("tz.alias"));
+}
+catch (IOException ioe) {
+			Log.w("MSvB-Hack", "Error loading timezone aliases: " + ioe.getMessage());
+}
+try {
+	ALIASES.load(ResourceLoader.getResourceAsStream("/tz.alias"));
+}
+catch (Exception e) {
+			Log.d("MSvB-Hack", "Error loading custom timezone aliases: " + e.getMessage());
+}
+}
+private Map timezones;
+private String resourcePrefix;
+/**
+* Default constructor.
+*/
+public TimeZoneRegistryImpl() {
+this(DEFAULT_RESOURCE_PREFIX);
+}
+/**
+* Creates a new instance using the specified resource prefix.
+* @param resourcePrefix a prefix prepended to classpath resource lookups for default timezones
+*/
+public TimeZoneRegistryImpl(final String resourcePrefix) {
+this.resourcePrefix = resourcePrefix;
+timezones = new ConcurrentHashMap();
+}
+/**
+* {@inheritDoc}
+*/
+public final void register(final TimeZone timezone) {
+	// for now we only apply updates to included definitions by default..
+	register(timezone, false);
+}
+/**
+* {@inheritDoc}
+*/
+public final void register(final TimeZone timezone, boolean update) {
+	if (update) {
+// load any available updates for the timezone..
+timezones.put(timezone.getID(), new TimeZone(updateDefinition(timezone.getVTimeZone())));
+	}
+	else {
+timezones.put(timezone.getID(), timezone);
+	}
+}
+/**
+* {@inheritDoc}
+*/
+public final void clear() {
+timezones.clear();
+}
+/**
+* {@inheritDoc}
+*/
+public final TimeZone getTimeZone(final String id) {
+TimeZone timezone = (TimeZone) timezones.get(id);
+if (timezone == null) {
+timezone = (TimeZone) DEFAULT_TIMEZONES.get(id);
+if (timezone == null) {
+// if timezone not found with identifier, try loading an alias..
+final String alias = ALIASES.getProperty(id);
+if (alias != null) {
+return getTimeZone(alias);
+}
+else {
+synchronized (DEFAULT_TIMEZONES) {
+	// check again as it may be loaded now..
+	timezone = (TimeZone) DEFAULT_TIMEZONES.get(id);
+	if (timezone == null) {
+try {
+final VTimeZone vTimeZone = loadVTimeZone(id);
+if (vTimeZone != null) {
+// XXX: temporary kludge..
+// ((TzId) vTimeZone.getProperties().getProperty(Property.TZID)).setValue(id);
+timezone = new TimeZone(vTimeZone);
+DEFAULT_TIMEZONES.put(timezone.getID(), timezone);
+}
+else if (CompatibilityHints.isHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING)) {
+// strip global part of id and match on default tz..
+Matcher matcher = TZ_ID_SUFFIX.matcher(id);
+if (matcher.find()) {
+return getTimeZone(matcher.group());
+}
+}
+}
+catch (Exception e) {
+Log.w("MSvB-Hack", "Error occurred loading VTimeZone", e);
+}
+	}
+}
+}
+}
+}
+return timezone;
+}
+/**
+* Loads an existing VTimeZone from the classpath corresponding to the specified Java timezone.
+*/
+private VTimeZone loadVTimeZone(final String id) throws IOException, ParserException {
+final URL resource = ResourceLoader.getResource(resourcePrefix + id + ".ics");
+if (resource != null) {
+final CalendarBuilder builder = new CalendarBuilder();
+final Calendar calendar = builder.build(resource.openStream());
+final VTimeZone vTimeZone = (VTimeZone) calendar.getComponent(Component.VTIMEZONE);
+// load any available updates for the timezone.. can be explicility disabled via configuration
+if (!"false".equals(Configurator.getProperty(UPDATE_ENABLED))) {
+return updateDefinition(vTimeZone);
+}
+return vTimeZone;
+}
+return null;
+}
+/**
+* @param vTimeZone
+* @return
+*/
+private VTimeZone updateDefinition(VTimeZone vTimeZone) {
+final TzUrl tzUrl = vTimeZone.getTimeZoneUrl();
+if (tzUrl != null) {
+try {
+final CalendarBuilder builder = new CalendarBuilder();
+final Calendar calendar = builder.build(tzUrl.getUri().toURL().openStream());
+final VTimeZone updatedVTimeZone = (VTimeZone) calendar.getComponent(Component.VTIMEZONE);
+if (updatedVTimeZone != null) {
+return updatedVTimeZone;
+}
+}
+catch (Exception e) {
+Log.w("MSvB-Hack", "Unable to retrieve updates for timezone: " + vTimeZone.getTimeZoneId().getValue(), e);
+}
+}
+return vTimeZone;
+}
+}

Caldavsync Sources / file comparison

comparison: hack/model/TimeZoneRegistryImpl.java

hack/model/TimeZoneRegistryImpl.java