* @param name the resource bundle name (must not be {@literal null} or empty)
     * @return {@link ResourceBundle}
     * @see ResourceBundle#getBundle(String)
     */
    public static final ResourceBundle getBundle(final String name) {
        assertArgumentNotEmpty("name", name);

        try {
            return ResourceBundle.getBundle(name);
        } catch (final MissingResourceException ignore) {
            return null;

     */
    protected static String getPattern(final String messageCode) {
        if (isEmpty(messageCode)) {
            return null;
        }
        final ResourceBundle resourceBundle = getResourceBundle(getSystemName(messageCode));
        if (resourceBundle == null) {
            return null;
        }

        final int length = messageCode.length();
        if (length > CODE_NUMBER_LENGTH) {

import static org.junit.Assert.assertThat;

import java.util.Map;
import java.util.ResourceBundle;

import org.junit.Test;

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

    /**
     * @throws Exception
     */
    @Test
    public void testConvertMap() throws Exception {
        final ResourceBundle bundle = ResourceBundleUtil.getBundle("CLMessages", null);

        final Collection<String> values = queryMap.values();
        if (values.stream().anyMatch(s -> s.startsWith(filetypeField))) {
            final ResourceBundle resources = ResourceBundle.getBundle("fess_label", Locale.ENGLISH);
            final String[] fileTypes = ComponentUtil.getFileTypeHelper().getTypes();
            for (final String fileType : fileTypes) {