org.teamapps.ux.i18n.TeamAppsResourceBundleControl Maven / Gradle / Ivy
/*-
* ========================LICENSE_START=================================
* TeamApps
* ---
* Copyright (C) 2014 - 2024 TeamApps.org
* ---
* 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.
* =========================LICENSE_END==================================
*/
package org.teamapps.ux.i18n;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Locale;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
/**
* Handles UTF-8 resource bundles (properties files only).
* Makes fallback locale explicitly configurable.
*/
public class TeamAppsResourceBundleControl extends ResourceBundle.Control {
private final String resourceFileSuffix;
private final Locale fallbackLocale;
public TeamAppsResourceBundleControl(String resourceFileSuffix, Locale fallbackLocale) {
this.resourceFileSuffix = resourceFileSuffix;
this.fallbackLocale = fallbackLocale;
}
@Override
public ResourceBundle newBundle(String baseName, Locale locale, String format, ClassLoader loader, boolean reload) throws IOException {
// The below is a copy of the default implementation.
String bundleName = toBundleName(baseName, locale);
String resourceName = toResourceName(bundleName, resourceFileSuffix);
ResourceBundle bundle = null;
InputStream stream = null;
if (reload) {
URL url = loader.getResource(resourceName);
if (url != null) {
URLConnection connection = url.openConnection();
if (connection != null) {
connection.setUseCaches(false);
stream = connection.getInputStream();
}
}
} else {
stream = loader.getResourceAsStream(resourceName);
}
if (stream != null) {
try {
// Only this line is changed to make it to read properties files as UTF-8.
bundle = new PropertyResourceBundle(new InputStreamReader(stream, StandardCharsets.UTF_8));
} finally {
stream.close();
}
}
return bundle;
}
@Override
public Locale getFallbackLocale(String baseName, Locale locale) {
if (baseName == null) {
throw new NullPointerException();
}
return locale.equals(fallbackLocale) ? null : fallbackLocale;
}
@Override
public List getCandidateLocales(String baseName, Locale locale) {
List list = super.getCandidateLocales(baseName, locale);
list.add(fallbackLocale);
return list;
}
}