*
     * @param locale the locale
     * @return the {@literal locale} if not {@literal null}, otherwise the default locale
     */
    protected static Locale getLocale(final Locale locale) {
        if (locale != null) {
            return locale;
        }
        return LocaleUtil.getDefault();
    }

     *
     * @param locale
     *            Locale
     * @return Separator for decimal numbers
     */
    public static String findDecimalSeparator(final Locale locale) {
        final DecimalFormatSymbols symbol = getDecimalFormatSymbols(locale);
        return Character.toString(symbol.getDecimalSeparator());
    }

    private static DecimalFormatSymbols getDecimalFormatSymbols(final Locale locale) {

     *
     * @param s
     *            A string representing a number
     * @param locale
     *            The locale. Must not be {@literal null}.
     * @return The normalized string
     */
    public static String normalize(final String s, final Locale locale) {
        assertArgumentNotNull("locale", locale);

        if (s == null) {
            return null;
        }

import static org.junit.Assert.assertThat;

import java.util.Locale;

import org.codelibs.core.misc.LocaleUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

/**
 * @author wyukawa
 *
 */
public class NullArgumentExceptionTest {

    @Before
    public void setUp() throws Exception {
        LocaleUtil.setDefault(() -> Locale.JAPANESE);
    }

    @After

import java.util.Calendar;
import java.util.Date;
import java.util.Locale;

import org.codelibs.core.misc.LocaleUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

/**
 * @author higa
 */
public class DateConversionUtilTest {

    @Before
    public void setUp() throws Exception {
        LocaleUtil.setDefault(() -> Locale.JAPANESE);
    }

    @After

     * @return {@link Locale}
     */
    public static Locale getLocale(final String localeStr) {
        // TODO replace with Fess
        Locale locale = LocaleUtil.getDefault();
        if (localeStr != null) {
            final int index = localeStr.indexOf('_');
            if (index < 0) {
                locale = new Locale(localeStr);
            } else {
                final String language = localeStr.substring(0, index);

     * Returns {@link DecimalFormatSymbols}.
     *
     * @param locale
     *            The locale. Must not be {@literal null}.
     * @return {@link DecimalFormatSymbols}
     */
    public static DecimalFormatSymbols getDecimalFormatSymbols(final Locale locale) {
        assertArgumentNotNull("locale", locale);

        DecimalFormatSymbols symbols = CACHE.get(locale);
        if (symbols == null) {

        asDocMeta().version(version);
    }

    public Locale getLocale() {
        if (locale == null) {
            if (getValue() == null) {
                return Locale.ROOT;
            }
            locale = ComponentUtil.getFessConfig().getQueryLocaleFromName(getValue());
        }
        return locale;
    }

    @Override
    public String toString() {

package org.codelibs.core.misc;

import java.util.Locale;

import junit.framework.TestCase;

/**
 * @author higa
 *
 */
public class LocaleUtilTest extends TestCase {

    /**
     * @throws Exception
     */
    public void testGetLocale() throws Exception {
        assertEquals("1", LocaleUtil.getDefault(), LocaleUtil.getLocale(null));
        assertEquals("2", Locale.JAPANESE, LocaleUtil.getLocale("ja"));

    //                                                                       =============
    protected String resolveLabelIfNeeds(final MessageManager messageManager, final Locale locale, final String label) {
        return label.startsWith("labels.") ? messageManager.getMessage(locale, label) : label;
    }

    // ===================================================================================