LocaleConverter.java

package org.springframework.roo.converters;

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

import org.springframework.roo.shell.Completion;
import org.springframework.roo.shell.Converter;
import org.springframework.roo.shell.MethodTarget;

/**
 * {@link Converter} for {@link Locale}. Supports locales with ISO-639 (ie 'en')
 * or a combination of ISO-639 and ISO-3166 (ie 'en_AU').
 * 
 * @author Stefan Schmidt
 * @since 1.1
 */
public class LocaleConverter implements Converter<Locale> {

  public Locale convertFromText(final String value, final Class<?> requiredType,
      final String optionContext) {
    if (value.length() == 2) {
      // In case only a simpele ISO-639 code is provided we use that code
      // also for the country (ie 'de_DE')
      return new Locale(value, value.toUpperCase());
    } else if (value.length() == 5) {
      final String[] split = value.split("_");
      return new Locale(split[0], split[1]);
    } else {
      return null;
    }
  }

  public boolean getAllPossibleValues(final List<Completion> completions,
      final Class<?> requiredType, final String existingData, final String optionContext,
      final MethodTarget target) {
    return false;
  }

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