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package org.apache.tapestry.services.impl; |
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import org.apache.hivemind.service.ThreadLocale; |
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import org.apache.tapestry.TapestryConstants; |
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import org.apache.tapestry.TapestryUtils; |
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import org.apache.tapestry.services.CookieSource; |
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import org.apache.tapestry.services.RequestLocaleManager; |
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import org.apache.tapestry.web.WebRequest; |
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import java.util.*; |
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public class RequestLocaleManagerImpl implements RequestLocaleManager |
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{ |
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private WebRequest _request; |
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private Locale _requestLocale; |
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private CookieSource _cookieSource; |
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private ThreadLocale _threadLocale; |
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private String _acceptedLocales; |
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private Locale _defaultLocale; |
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private Set _acceptedLocaleNamesSet = new HashSet(); |
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private Map _localeCache = new HashMap(); |
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public void initializeService() |
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{ |
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String[] names = TapestryUtils.split(_acceptedLocales); |
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if (names.length == 0) |
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return; |
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_defaultLocale = getLocale(names[0]); |
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_acceptedLocaleNamesSet.addAll(Arrays.asList(names)); |
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} |
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public Locale extractLocaleForCurrentRequest() |
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{ |
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String localeName = _cookieSource.readCookieValue(TapestryConstants.LOCALE_COOKIE_NAME); |
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String requestedLocale = (localeName != null) ? localeName : _request.getLocale().toString(); |
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_requestLocale = filterRequestedLocale(requestedLocale); |
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_threadLocale.setLocale(_requestLocale); |
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return _requestLocale; |
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} |
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Locale filterRequestedLocale(String localeName) |
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{ |
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String requestLocaleName = localeName; |
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if (_acceptedLocaleNamesSet.isEmpty()) |
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return getLocale(requestLocaleName); |
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while (requestLocaleName.length() > 0) |
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{ |
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if (_acceptedLocaleNamesSet.contains(requestLocaleName)) |
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return getLocale(requestLocaleName); |
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requestLocaleName = stripTerm(requestLocaleName); |
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} |
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for (Iterator it = _acceptedLocaleNamesSet.iterator(); it.hasNext();) { |
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String locale = (String) it.next(); |
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if (locale.startsWith(localeName)) |
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return getLocale(locale); |
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} |
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return _defaultLocale; |
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} |
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private String stripTerm(String localeName) |
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{ |
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int scorex = localeName.lastIndexOf('_'); |
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return scorex < 0 ? "" : localeName.substring(0, scorex); |
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} |
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public void persistLocale() |
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{ |
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Locale locale = _threadLocale.getLocale(); |
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if (locale.equals(_requestLocale)) |
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return; |
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_cookieSource.writeCookieValue(TapestryConstants.LOCALE_COOKIE_NAME, locale.toString()); |
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} |
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Locale getLocale(String name) |
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{ |
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Locale result = (Locale) _localeCache.get(name); |
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if (result == null) |
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{ |
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result = constructLocale(name); |
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_localeCache.put(name, result); |
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} |
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return result; |
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} |
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private Locale constructLocale(String name) |
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{ |
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String[] terms = TapestryUtils.split(name, '_'); |
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switch (terms.length) |
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{ |
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case 1: |
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return new Locale(terms[0], ""); |
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case 2: |
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return new Locale(terms[0], terms[1]); |
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case 3: |
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return new Locale(terms[0], terms[1], terms[2]); |
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default: |
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throw new IllegalArgumentException(); |
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} |
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} |
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public void setCookieSource(CookieSource source) |
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{ |
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_cookieSource = source; |
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} |
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public void setRequest(WebRequest request) |
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{ |
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_request = request; |
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} |
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public void setThreadLocale(ThreadLocale threadLocale) |
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{ |
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_threadLocale = threadLocale; |
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} |
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public void setAcceptedLocales(String acceptedLocales) |
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{ |
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_acceptedLocales = acceptedLocales; |
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} |
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} |