/*
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.i18n.rebind;
import com.google.gwt.core.ext.BadPropertyValueException;
import com.google.gwt.core.ext.ConfigurationProperty;
import com.google.gwt.core.ext.PropertyOracle;
import com.google.gwt.core.ext.SelectionProperty;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.i18n.server.GwtLocaleFactoryImpl;
import com.google.gwt.i18n.shared.GwtLocale;
import com.google.gwt.i18n.shared.GwtLocaleFactory;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
/**
* Utility methods for dealing with locales.
*/
public class LocaleUtils {
// TODO(jat): rewrite to avoid statics
private static final GwtLocaleFactoryImpl factory = new GwtLocaleFactoryImpl();
/**
* The token representing the locale property controlling Localization.
*/
private static final String PROP_LOCALE = "locale";
/**
* The token representing the runtime.locales configuration property.
*/
private static final String PROP_RUNTIME_LOCALES = "runtime.locales";
private static GwtLocale compileLocale;
private static final Set<GwtLocale> allLocales = new HashSet<GwtLocale>();
private static final Set<GwtLocale> allCompileLocales = new HashSet<GwtLocale>();
private static final Set<GwtLocale> runtimeLocales = new HashSet<GwtLocale>();
public static void clear() {
allCompileLocales.clear();
allLocales.clear();
compileLocale = null;
factory.clear();
runtimeLocales.clear();
}
/**
* Returns the set of all compile-time locales.
*
* @return unmodifiable set of all compile-time locales
*/
public static Set<GwtLocale> getAllCompileLocales() {
return Collections.unmodifiableSet(allCompileLocales);
}
/**
* Returns the set of all available locales, whether compile-time locales or
* runtime locales.
*
* @return unmodifiable set of all locales
*/
public static Set<GwtLocale> getAllLocales() {
return Collections.unmodifiableSet(allLocales);
}
/**
* @return the static compile-time locale for this permutation.
*/
public static GwtLocale getCompileLocale() {
return compileLocale;
}
/**
* Get a shared GwtLocale factory so instances are cached between all uses.
*
* @return singleton GwtLocaleFactory instance.
*/
public static GwtLocaleFactory getLocaleFactory() {
return factory;
}
/**
* Returns a list of locales which are children of the current compile-time
* locale.
*
* @return unmodifiable list of matching locales
*/
public static Set<GwtLocale> getRuntimeLocales() {
return Collections.unmodifiableSet(runtimeLocales);
}
/**
* Initialize from properties. Only needs to be called once, before any other
* calls.
*
* @param logger
* @param propertyOracle
*/
public static void init(TreeLogger logger, PropertyOracle propertyOracle) {
try {
SelectionProperty localeProp
= propertyOracle.getSelectionProperty(logger, PROP_LOCALE);
String localeName = localeProp.getCurrentValue();
SortedSet<String> localeValues = localeProp.getPossibleValues();
GwtLocale newCompileLocale = factory.fromString(localeName);
if (newCompileLocale.equals(compileLocale)) {
return;
}
compileLocale = newCompileLocale;
allLocales.clear();
allCompileLocales.clear();
runtimeLocales.clear();
for (String localeValue : localeValues) {
allCompileLocales.add(factory.fromString(localeValue));
}
allLocales.addAll(allCompileLocales);
ConfigurationProperty prop
= propertyOracle.getConfigurationProperty(PROP_RUNTIME_LOCALES);
List<String> rtLocaleNames = prop.getValues();
if (rtLocaleNames != null) {
for (String rtLocale : rtLocaleNames) {
GwtLocale locale = factory.fromString(rtLocale);
// TODO(jat): remove use of labels
existingLocales:
for (GwtLocale existing : allCompileLocales) {
for (GwtLocale alias : existing.getAliases()) {
if (!alias.isDefault() && locale.inheritsFrom(alias)
&& locale.usesSameScript(alias)) {
allLocales.add(locale);
break existingLocales;
}
}
}
if (!compileLocale.isDefault()
&& locale.inheritsFrom(compileLocale)
&& locale.usesSameScript(compileLocale)) {
// TODO(jat): don't include runtime locales which also inherit
// from a more-specific compile locale than this one
runtimeLocales.add(locale);
}
}
}
} catch (BadPropertyValueException e) {
logger.log(TreeLogger.TRACE,
"Unable to get locale properties, using defaults", e);
compileLocale = factory.fromString("default");
allLocales.add(compileLocale);
return;
}
}
}