- **Extensible Architecture**: Plugin system for custom extractors, transformers, and clients
- **Rate Limiting**: Politeness policies and interval controllers
- **URL Filtering**: Regex-based inclusion/exclusion patterns
- **Data Persistence**: Multiple backend options including OpenSearch integration

## Technology Stack

- **Java**: 21+ (requires Java 21 or higher)
- **Build System**: Maven 3.x

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
import org.jspecify.annotations.Nullable;

/**

 * the License.
 */

package com.google.common.base;


import com.google.common.annotations.GwtCompatible;
import java.lang.ref.WeakReference;
import java.util.Locale;
import java.util.regex.Pattern;
import org.jspecify.annotations.Nullable;

/**
 * Methods factored out so that they can be emulated differently in GWT.
 *
 * @author Jesse Wilson
 */
@GwtCompatible
final class Platform {

private
fun matchesName(name: String, candidateName: String) =
    name == candidateName.replace(".*\\$".toRegex(), "") // strip outer class names

private
val SINCE_REGEX = Regex("""@since ([^\s]+)""")

private
fun BodyDeclaration<*>.getSince(): String? =
    comment?.orElse(null)?.content?.let { content ->
        SINCE_REGEX.find(content)?.groupValues?.get(1)
    }


private

            doColumn("createdTime");
        }

        public void columnProcessType() {
            doColumn("processType");
        }

        public void columnRegex() {
            doColumn("regex");
        }

        public void columnReplacement() {
            doColumn("replacement");
        }

        public void columnSortOrder() {
            doColumn("sortOrder");
        }

import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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 java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Set;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

/**
 * A task to gather information about the dependencies and export them into a csv file.
 * <p>
 * The following information is gathered:
 * <ul>

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

import java.util.Map;
import java.util.regex.Pattern;

import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.stream.StreamUtil;
import org.codelibs.fess.Constants;
import org.dbflute.optional.OptionalThing;

/**

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.misc.Pair;
import org.codelibs.fess.opensearch.log.bsbhv.BsSearchLogBhv;

import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.function.Consumer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import static java.util.Collections.emptyList;
import static java.util.Collections.unmodifiableList;

/**