I18nConverter.java

package org.springframework.roo.addon.web.mvc.i18n.components;

import java.util.List;
import java.util.Locale;

import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.springframework.roo.shell.Completion;
import org.springframework.roo.shell.Converter;
import org.springframework.roo.shell.MethodTarget;

/**
 * {@link Converter} for {@link I18n}.
 * 
 * @author Stefan Schmidt
 * @since 1.0
 */
@Component
@Service
public class I18nConverter implements Converter<I18n> {

  @Reference
  private I18nSupport i18nSupport;

  public I18n convertFromText(final String value, final Class<?> requiredType,
      final String optionContext) {
    if (value.length() == 2) {
      return i18nSupport.getLanguage(new Locale(value, "", ""));
      // Disabled due to ROO-1584
      // } else if (value.length() == 5) {
      // String[] split = value.split("_");
      // return i18nSupport.getLanguage(new Locale(split[0],
      // split[1].toUpperCase(), ""));
    }
    return null;
  }

  public boolean getAllPossibleValues(final List<Completion> completions,
      final Class<?> requiredType, final String existingData, final String optionContext,
      final MethodTarget target) {
    for (final I18n i18n : i18nSupport.getSupportedLanguages()) {
      final Locale locale = i18n.getLocale();
      final StringBuilder localeString = new StringBuilder(locale.getLanguage());
      if (locale.getCountry() == null || locale.getCountry().length() > 0) {
        localeString.append("_").append(locale.getCountry().toUpperCase());
      }
      completions.add(new Completion(localeString.toString()));
    }
    return true;
  }

  public boolean supports(final Class<?> requiredType, final String optionContext) {
    return I18n.class.isAssignableFrom(requiredType);
  }
}