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copied!<p>Doing a GWT.create on the TimeZoneConstants class is bad game according to the GWT Javadoc [1]. So what I did was create a class on the server-side that parses /com/google/gwt/i18n/client/constants/TimeZoneConstants.properties and builds a cache of all the JSON objects for each time zone (indexed by their Olson TZID).</p> <p>My site is running on jboss, so I copied TimeZoneConstants.properties into my site's war/WEB-INF/lib directory (probably didn't need to copy it there since the GWT jars are already there). Then I have a singleton class that does the parsing when constructed:</p> <pre><code>InputStream inStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(PROPERTIES_FILE); InputStreamReader isr = new InputStreamReader(inStream); BufferedReader br = new BufferedReader(isr); for (String s; (s = br.readLine()) != null;) { // using a regex to grab the id to use as a key to the hashmap // a full json parser here would be overkill Pattern pattern = Pattern.compile("^[A-Za-z]+ = (.*\"id\": \"([A-Za-z_/]+)\".*)$"); Matcher matcher = pattern.matcher(s); if (matcher.matches()) { String id = matcher.group(2); String json = matcher.group(1); if (!jsonMap.containsKey(id)) { jsonMap.put(id, json); } } } br.close(); isr.close(); inStream.close(); </code></pre> <p>Finally I make an RPC call to get the TimeZoneInfoJSON to the client (assuming the server knows which TimeZoneID I'm interested in):</p> <pre><code>getTimeZone(new PortalAsyncCallback<String>() { public void onSuccess(String tzJson) { timeZone = TimeZone.createTimeZone(TimeZoneInfo.buildTimeZoneData(tzJson)); } }); </code></pre> <p>Not the most elegant solution but it has given me a way to display dates and times for a specific time zone over DST transitions.</p> <p>[1] <a href="http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/i18n/client/constants/TimeZoneConstants.html" rel="nofollow">http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/i18n/client/constants/TimeZoneConstants.html</a></p>

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