UTF8Control.java

/*
 * Copyright [2014] [Christian Loehnert, krampenschiesser@gmail.com]
 * 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 de.ks.i18n;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.Locale;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
import java.util.ResourceBundle.Control;

/**
 * Reads file with UTF8 encoding.
 */
class UTF8Control extends Control {
  @Override
  public ResourceBundle newBundle(String baseName, Locale locale, String format, ClassLoader loader, boolean reload) throws IllegalAccessException, InstantiationException, IOException {
    String resourceName = getResourceName(baseName, locale);
    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 {
        bundle = new PropertyResourceBundle(new InputStreamReader(stream, "UTF-8"));
      } finally {
        stream.close();
      }
    }
    return bundle;
  }

  public String getResourceName(String baseName, Locale locale) {
    String bundleName = toBundleName(baseName, locale);
    return toResourceName(bundleName, "properties");
  }

  @Override
  public Locale getFallbackLocale(String baseName, Locale locale) {
    return Locale.ENGLISH;
  }
}