Currencies.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.turro.zkoss.locale;
 
import java.util.ArrayList;
import java.util.Currency;
import java.util.List;
import java.util.Locale;
import java.util.MissingResourceException;
import org.turro.string.Strings;
import org.turro.elephant.context.Application;
 
public class Currencies {
 
  public static List<Currency> getAvailable() {
    List<Currency> list = new ArrayList<Currency>();
    for(Locale l : Locale.getAvailableLocales()) {
      if(hasValidCountry(l)) {
        Currency c = Currency.getInstance(l);
        if(!list.contains(c)) {
          list.add(c);
        }
      }
    }
    return list;
  }
 
  public static Currency getDefault() {
    Currency c = getDefault(Application.getUsedLocale());
    return c == null ? Currency.getInstance("EUR") : c;
  }
 
  public static Currency getDefault(Locale l) {
    if(hasValidCountry(l)) {
      return Currency.getInstance(l);
    }
    return null;
  }
  
  public static boolean hasValidCountry(Locale l) {
    try {
      return !Strings.isBlank(l.getISO3Country());
    } catch(MissingResourceException mre) {
      return false;
    }
  }
 
  private Currencies() {
  }
 
}