LocaleConverter.java

package vnet.sms.common.shell.springshell.internal.converters;

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

import vnet.sms.common.shell.springshell.Completion;
import vnet.sms.common.shell.springshell.Converter;
import vnet.sms.common.shell.springshell.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> {

	@Override
	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;
		}
	}

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

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