* <p>
     * 次のように使います．
     * </p>
     *
     * <pre>
     * StringUtil.defaultString(null, "NULL")  = "NULL"
     * StringUtil.defaultString("", "NULL")    = ""
     * StringUtil.defaultString("aaa", "NULL") = "aaa"
     * StringUtil.defaultString("aaa", null) = "aaa"
     * StringUtil.defaultString(null, null) = null
     * </pre>
     *
     * @param str

        assertEquals("c", StringUtil.substringToLast("abc", "b"));
        assertEquals("c", StringUtil.substringToLast("abcbc", "b"));
        assertEquals("abc", StringUtil.substringToLast("abc", ""));
        assertEquals("abc", StringUtil.substringToLast("abc", null));
        assertEquals("abc", StringUtil.substringToLast("abc", "dddd"));
    }

    /**
     * @throws Exception
     */

            credentials = new NTCredentials(username, password == null ? StringUtil.EMPTY : password,
                    workstation == null ? StringUtil.EMPTY : workstation, domain == null ? StringUtil.EMPTY : domain);
        } else {
            credentials = new UsernamePasswordCredentials(username, password == null ? StringUtil.EMPTY : password);
        }
        return credentials;
    }

        putResultDataBody(dataMap, fessConfig.getIndexFieldVirtualHost(),
                stream(crawlingConfig.getVirtualHosts()).get(stream -> stream.filter(StringUtil::isNotBlank).collect(Collectors.toList())));
        // TODO date
        // lang
        if (StringUtil.isNotBlank(fessConfig.getCrawlerDocumentFileDefaultLang())) {

            if (StringUtil.isNotBlank(getIncludedDocUrls())) {
                final List<Pattern> urlPatterList = new ArrayList<>();
                final String[] urls = getIncludedDocUrls().split("[\r\n]");
                for (final String u : urls) {
                    final String v = systemHelper.normalizeConfigPath(u);
                    if (StringUtil.isNotBlank(v)) {

            final String includedPaths = labelType.getIncludedPaths();
            final String excludedPaths = labelType.getExcludedPaths();
            if (StringUtil.isNotBlank(includedPaths) || StringUtil.isNotBlank(excludedPaths)) {
                try {
                    list.add(new LabelTypePattern(labelType.getValue(), includedPaths, excludedPaths));
                } catch (final Exception e) {

        final List<String> pagingQueryList = new ArrayList<>();
        if (form.ex_q != null) {
            stream(form.ex_q).of(stream -> stream.filter(StringUtil::isNotBlank).distinct()
                    .forEach(q -> pagingQueryList.add("ex_q=" + LaFunctions.u(q))));
        }
        if (StringUtil.isNotBlank(form.sort)) {
            pagingQueryList.add("sort=" + LaFunctions.u(form.sort));
        }
        if (form.lang != null) {

import java.util.regex.Pattern;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.io.CloseableUtil;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.misc.Pair;
import org.codelibs.fess.app.service.FailureUrlService;
import org.codelibs.fess.crawler.builder.RequestDataBuilder;
import org.codelibs.fess.crawler.client.CrawlerClient;

        switch (form.crudMode) {
        case CrudMode.CREATE:
            final KuromojiItem entity = new KuromojiItem(0, StringUtil.EMPTY, StringUtil.EMPTY, StringUtil.EMPTY, StringUtil.EMPTY);
            return OptionalEntity.of(entity);
        case CrudMode.EDIT:
            if (form instanceof EditForm) {

import java.util.stream.Collectors;
import java.util.stream.Stream;

import javax.annotation.Resource;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.annotation.Secured;
import org.codelibs.fess.app.pager.LabelTypePager;
import org.codelibs.fess.app.service.LabelTypeService;