import org.codelibs.core.lang.StringUtil;

/**
 * Constants class that extends CoreLibConstants and contains application-wide constant values for the Fess search engine.
 * This class provides constants for system configuration, crawling and indexing defaults, user agent strings,
 * status values, field names, date/time formats, authentication types, and various reserved words and patterns.
 *
 * <p>Key constant categories include:</p>
 * <ul>

        return Constants.TRUE.equalsIgnoreCase(getSystemProperty(key, defaultValue ? Constants.TRUE : Constants.FALSE));
    }

    default void setSystemPropertyAsBoolean(final String key, final boolean value) {
        setSystemProperty(key, value ? Constants.TRUE : Constants.FALSE);
    }

import org.codelibs.fess.Constants;
import org.codelibs.fess.unit.UnitFessTestCase;

public class SystemUtilTest extends UnitFessTestCase {

    public void test_getSearchEngineHttpAddress_null() {
        // Clear the system property to test null case
        String originalValue = System.getProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);
        System.clearProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);

    /**
     * Initializes the form with default values for creating a new scheduled job.
     */
    public void initialize() {
        target = Constants.DEFAULT_JOB_TARGET;
        cronExpression = Constants.DEFAULT_CRON_EXPRESSION;
        scriptType = Constants.DEFAULT_JOB_SCRIPT_TYPE;
        sortOrder = 0;
        createdBy = ComponentUtil.getSystemHelper().getUsername();

      Class<T> enumClass) {
    synchronized (enumConstantCache) {
      Map<String, WeakReference<? extends Enum<?>>> constants = enumConstantCache.get(enumClass);
      if (constants == null) {
        constants = populateCache(enumClass);
      }
      return constants;
    }
  }

  /**
   * Returns a serializable converter that converts between strings and {@code enum} values of type

        value = null;
        assertEquals("", dataStore.convertValue(Constants.DEFAULT_SCRIPT, value, paramMap));

        value = "";
        assertEquals("", dataStore.convertValue(Constants.DEFAULT_SCRIPT, value, paramMap));

        value = " ";
        assertNull(dataStore.convertValue(Constants.DEFAULT_SCRIPT, value, paramMap));
    }

        getMockRequest().setAttribute(Constants.FIELD_LOGS, new HashMap<String, List<String>>());
        queryContext = new QueryContext("test", true);
        assertEquals("test", queryContext.getQueryString());

        // Verify that highlighting and field log are initialized
        assertNotNull(getMockRequest().getAttribute(Constants.HIGHLIGHT_QUERIES));

        }

        final String[] searchers = DocumentUtil.getValue(docMap, Constants.SEARCHER, String[].class);
        if (searchers != null) {
            docMap.put(Constants.SEARCHER, ArrayUtil.add(searchers, getName()));
        } else {
            docMap.put(Constants.SEARCHER, new String[] { getName() });
        }

        return docMap;
    }

                    copyBeanToBean(entity, form, copyOp -> {
                        copyOp.excludeNull();
                        copyOp.exclude(Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE),
                                Stream.of(Constants.PERMISSIONS, Constants.VIRTUAL_HOSTS)).toArray(n -> new String[n]));
                    });
                    final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();

    /**
     * Processes the job.
     * @param runtime The job runtime.
     */
    protected void process(final LaJobRuntime runtime) {
        if (!runtime.getParameterMap().containsKey(Constants.SCHEDULED_JOB)) {
            logger.warn("{} is empty.", Constants.SCHEDULED_JOB);
            return;
        }
        runtime.stopIfNeeds();

        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();