void testJsonLoggingToggle() {
        logger.setJsonLoggingEnabled(true);
        logger.logAuthentication(true, "user", "DOMAIN", "192.168.1.1");

        logger.setJsonLoggingEnabled(false);
        logger.logAuthentication(true, "user2", "DOMAIN", "192.168.1.2");

        // Verify that both events were logged
        Map<EventType, Long> stats = logger.getStatistics();

     */
    protected CloseableUtil() {
    }

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

    /**
     * Closes a {@link Closeable}.
     * <p>
     * If an exception is thrown by {@link Closeable#close()}, an error message is logged. The exception is not rethrown. This prevents the original exception from being lost in situations like the following:
     * </p>
     * <pre>

 *
 * @author higa
 */
public abstract class StatementUtil {

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

    /**
     * Do not instantiate.
     */
    protected StatementUtil() {
    }

    /**
     * Executes the SQL.
     *
     * @param statement
     *            {@link Statement}. Must not be {@literal null}.
     * @param sql

                        if (logger.isDebugEnabled()) {
                            logger.debug("{} exists.", urlQueue.getUrl(), e);
                        }
                        return;
                    }
                    throw e;
                }
                if (logger.isDebugEnabled()) {
                    logger.debug("Storing child urls: {}", resultData.getChildUrlSet());

        }
    }

    // Test to verify the logger field is properly initialized
    public void test_loggerFieldInitialization() throws Exception {
        // Use reflection to access the private logger field
        Field loggerField = FessCurtainFinallyHook.class.getDeclaredField("logger");
        loggerField.setAccessible(true);

        Object logger = loggerField.get(null); // static field

 */
package org.codelibs.core.lang;

import org.codelibs.core.exception.InterruptedRuntimeException;
import org.codelibs.core.log.Logger;

/**
 * Utility class for Thread class
 *
 * @author shinsuke
 *
 */
public abstract class ThreadUtil {

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

    /**
     * Do not instantiate.
     */
    protected ThreadUtil() {
    }

    /**

 * @author koichik
 */
public abstract class ZipInputStreamUtil {

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

    /**
     * Do not instantiate.
     */
    protected ZipInputStreamUtil() {
    }

    /**
     * A method that wraps the exception handling of {@link ZipInputStream#getNextEntry()}.
     *
     * @param zis

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

    /**
     * Do not instantiate.
     */
    protected ResultSetUtil() {
    }

    /**
     * Closes the result set.
     * <p>
     * If {@link ResultSet#close()} throws an exception, an error message is logged. The exception is not rethrown.
     * </p>
     *
     * @param resultSet
     *            The result set

import org.codelibs.core.io.FileUtil;
import org.codelibs.core.log.Logger;
import org.codelibs.core.net.URLUtil;

/**
 * Utility class for handling {@link java.util.zip.ZipFile}.
 *
 * @author higa
 */
public abstract class ZipFileUtil {

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

    /**
     * Do not instantiate.
     */

    /**
     * Do not instantiate.
     */
    protected JarFileUtil() {
    }

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

    /**
     * Creates and returns a <code>JarFile</code> to read the specified JAR file.
     *
     * @param file the file path (must not be {@literal null})
     * @return a <code>JarFile</code> to read the specified JAR file
     */