parameters = "";
        parameterMap = ParameterUtil.parse(parameters);
        assertEquals(0, parameterMap.size());

        parameters = "domain";
        parameterMap = ParameterUtil.parse(parameters);
        assertEquals(1, parameterMap.size());
        assertEquals("", parameterMap.get("domain"));

        parameters = "domain=";
        parameterMap = ParameterUtil.parse(parameters);

import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.opensearch.config.bsentity.BsFileConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.ParameterUtil;

/**
 * @author FreeGen
 */
public class FileConfig extends BsFileConfig implements CrawlingConfig {

    private static final Logger logger = LogManager.getLogger(FileConfig.class);

        if (handlerParameterMap == null) {
            handlerParameterMap = ParameterUtil.parse(getHandlerParameter());
        }
        return handlerParameterMap;
    }

    public Map<String, String> getHandlerScriptMap() {
        if (handlerScriptMap == null) {
            handlerScriptMap = ParameterUtil.parse(getHandlerScript());
        }
        return handlerScriptMap;
    }

import org.codelibs.fess.opensearch.config.bsentity.BsWebConfig;
import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig.Param.Client;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.ParameterUtil;

/**
 * @author FreeGen
 */
public class WebConfig extends BsWebConfig implements CrawlingConfig {

    private static final Logger logger = LogManager.getLogger(WebConfig.class);

        if (logger.isDebugEnabled()) {
            logger.debug("system.properties: {}", value);
        }
        if (StringUtil.isNotBlank(value)) {
            ParameterUtil.parse(ParameterUtil.encrypt(value)).entrySet().stream().filter(e -> {
                final String key = e.getKey();
                if (StringUtil.isBlank(key)) {
                    return false;
                }