### Key Architectural Patterns
- **Factory Pattern** - `BeanDescFactory` for creating bean descriptors, `ParameterizedClassDescFactory` for generic type handling
- **Builder Pattern** - `CopyOptions` for configuring bean copying operations with fluent API
- **Adapter Pattern** - Logging adapters (`JclLoggerAdapter`, `JulLoggerAdapter`) for different logging frameworks

{"attributes":{"description":"","kibanaSavedObjectMeta":{"searchSourceJSON":"{\"query\":{\"query\":\"\",\"language\":\"kuery\"},\"filter\":[],\"indexRefName...

     * This cache improves performance by avoiding repeated parsing of client configuration rules.
     * The key is the rule string, and the value is a pair containing the client name and compiled pattern.
     */
    protected ConcurrentHashMap<String, Pair<String, Pattern>> clientRuleCache = new ConcurrentHashMap<>();

    /**
     * Determines whether the content at the given URL has been updated since the last crawl.

import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Utility class for JVM-related operations.
 * This class provides methods for handling JVM options and version detection.
 */
public final class JvmUtil {
    private static final Pattern VERSION_PREFIX_PATTERN = Pattern.compile("([0-9]+)(\\-?):(.*)");

    private JvmUtil() {
        // nothing
    }

    /**

        return split(value, ",").get(stream -> stream.filter(StringUtil::isNotBlank).map(v -> {
            final Pattern pattern = Pattern.compile("(\\w+)(\\[[^\\]]+\\])?(\\.[\\w\\-]+)?(#[\\w\\-]+)?");
            final Matcher matcher = pattern.matcher(v.trim());
            if (matcher.matches()) {
                final PrunedTag tag = new PrunedTag(matcher.group(1));

        }
        return getQuerySet().map(querySet -> {
            final String pattern = querySet.stream().map(LaFunctions::h).map(Pattern::quote).collect(Collectors.joining("|"));
            if (StringUtil.isBlank(pattern)) {
                return null;
            }
            final Matcher matcher = Pattern.compile(pattern, Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE).matcher(value);

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.opensearch.config.exbhv;

import java.util.regex.Pattern;

import org.codelibs.fess.opensearch.config.bsbhv.BsBoostDocumentRuleBhv;
import org.codelibs.fess.util.ComponentUtil;

/**
 * @author FreeGen
 */

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.opensearch.config.exbhv;

import java.util.regex.Pattern;

import org.codelibs.fess.opensearch.config.bsbhv.BsFileConfigBhv;
import org.codelibs.fess.util.ComponentUtil;

/**
 * @author FreeGen
 */
public class FileConfigBhv extends BsFileConfigBhv {

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.opensearch.config.exbhv;

import java.util.regex.Pattern;

import org.codelibs.fess.opensearch.config.bsbhv.BsJobLogBhv;
import org.codelibs.fess.util.ComponentUtil;

/**
 * @author FreeGen
 */
public class JobLogBhv extends BsJobLogBhv {

     * @return the parsed charset name, or null if not found
     */
    protected String parseCharset(final String content) {
        final Pattern pattern = Pattern.compile("; *charset *= *([a-zA-Z0-9\\-_]+)", Pattern.CASE_INSENSITIVE);
        final Matcher matcher = pattern.matcher(content);
        if (matcher.find()) {
            return matcher.group(1);
        }
        return null;
    }

    /**