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| package org.apache.tapestry.services.impl; |
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| import java.util.Arrays; |
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| import java.util.HashMap; |
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| import java.util.HashSet; |
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| import java.util.Locale; |
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| import java.util.Map; |
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| import java.util.Set; |
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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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| 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()
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| .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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| if (_acceptedLocaleNamesSet.isEmpty())
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| return getLocale(localeName);
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| while (true)
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| { |
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| if (_acceptedLocaleNamesSet.contains(localeName))
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| return getLocale(localeName);
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| localeName = stripTerm(localeName);
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| if (localeName.length() == 0)
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| return _defaultLocale;
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| } |
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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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| } |