* 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.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicReference;

import org.codelibs.fess.crawler.CrawlerContext;
import org.codelibs.fess.crawler.entity.AccessResult;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.interval.impl;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

            }

            if (value instanceof List list) {
                return list.get(index);
            }
        } catch (NumberFormatException | IndexOutOfBoundsException e) {
            return null;
        }

        final String message = String.format(
                "The token '%s' at position '%d' refers to a java.util.List or an array, but the value "

        validateApi(body, messages -> {});
        final FileConfigPager pager = copyBeanToNewBean(body, FileConfigPager.class);
        final List<FileConfig> list = fileConfigService.getFileConfigList(pager);
        return asJson(
                new ApiResult.ApiConfigsResponse<EditBody>().settings(list.stream().map(this::createEditBody).collect(Collectors.toList()))
                        .total(pager.getAllRecordCount())

func (b *bucketMetacache) deleteCache(id string) {
	b.mu.Lock()
	c, ok := b.caches[id]
	if ok {
		// Delete from root map.
		list := b.cachesRoot[c.root]
		for i, lid := range list {
			if id == lid {
				list = append(list[:i], list[i+1:]...)
				break
			}
		}
		b.cachesRoot[c.root] = list
		delete(b.caches, id)
		b.updated = true
	}
	b.mu.Unlock()
	if ok {
		c.delete(context.Background())
	}

#### List { #list }

For example, let's define a variable to be a `list` of `str`.

Declare the variable, with the same colon (`:`) syntax.

As the type, put `list`.

As the list is a type that contains some internal types, you put them in square brackets:

    private final Collection<String> unprefixedPathKeys;
    private final File projectDir;
    private final PathTranslator pathTranslator;
    private final List<String> expressionPrefixes;

    PathTranslatingPostProcessor(
            List<String> expressionPrefixes,
            Collection<String> unprefixedPathKeys,
            File projectDir,
            PathTranslator pathTranslator) {

    @Override
    public PluginDescriptor loadPlugin(
            Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session) {
        return null;
    }

    @Override
    public MojoDescriptor getMojoDescriptor(
            Plugin plugin, String goal, List<RemoteRepository> repositories, RepositorySystemSession session) {
        return MojoExecutorStub.createMojoDescriptor(plugin);

   * Callers of TestContainerGenerator.order need to be prepared for implementations to return a new
   * collection.
   */
  @SuppressWarnings("CanIgnoreReturnValueSuggester")
  @Override
  public List<String> order(List<String> insertionOrder) {
    sort(insertionOrder);
    return insertionOrder;
  }

  @Override
  public String belowSamplesLesser() {
    return "!! a";
  }

  @Override

    private final AtomicReference<List<Entry>> entries = new AtomicReference<>(new CopyOnWriteArrayList<>());

    @Override
    public void log(Level level, String message, Throwable error) {
        requireNonNull(level, "level");
        requireNonNull(message, "message");
        entries.get().add(new Entry(level, message, error));
    }

    @Override
    public List<Entry> drain() {