import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;

import jakarta.annotation.PostConstruct;

/**
 * Standard transformer implementation for the Fess search engine.
 * This transformer handles document transformation and content extraction using
 * the standard Fess file transformation process with support for various content types.
 *

            Transformer transformer = factory.newTransformer()
            if (indent) {
                transformer.setOutputProperty(OutputKeys.INDENT, "yes")
            }
            transformer.setOutputProperty(OutputKeys.METHOD, "xml")
            transformer.setOutputProperty(OutputKeys.MEDIA_TYPE, "text/xml")
            transformer.transform(new DOMSource(root), new StreamResult(stream))
        }

    TransformedEntriesMap(
        Map<K, V1> fromMap, EntryTransformer<? super K, ? super V1, V2> transformer) {
      this.fromMap = checkNotNull(fromMap);
      this.transformer = checkNotNull(transformer);
    }

    @Override
    public int size() {
      return fromMap.size();
    }

    @Override
    public boolean containsKey(@Nullable Object key) {

    TransformedEntriesMap(
        Map<K, V1> fromMap, EntryTransformer<? super K, ? super V1, V2> transformer) {
      this.fromMap = checkNotNull(fromMap);
      this.transformer = checkNotNull(transformer);
    }

    @Override
    public int size() {
      return fromMap.size();
    }

    @Override
    public boolean containsKey(@Nullable Object key) {

import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.deployment.DeployRequest;
import org.eclipse.aether.installation.InstallRequest;

/**
 * Maven POM transformer.
 * TODO: rename this interface to "Transformer" as it can do much more than just transform POM.
 * @since TBD
 */
public interface PomArtifactTransformer {

import org.eclipse.aether.util.graph.selector.ExclusionDependencySelector;
import org.eclipse.aether.util.graph.transformer.ChainedDependencyGraphTransformer;
import org.eclipse.aether.util.graph.transformer.ConfigurableVersionSelector;
import org.eclipse.aether.util.graph.transformer.ConflictResolver;
import org.eclipse.aether.util.graph.transformer.SimpleOptionalitySelector;
import org.eclipse.aether.util.repository.SimpleArtifactDescriptorPolicy;

    final Multimap<K, V1> fromMultimap;
    final EntryTransformer<? super K, ? super V1, V2> transformer;

    TransformedEntriesMultimap(
        Multimap<K, V1> fromMultimap, EntryTransformer<? super K, ? super V1, V2> transformer) {
      this.fromMultimap = checkNotNull(fromMultimap);
      this.transformer = checkNotNull(transformer);
    }

    Collection<V2> transform(@ParametricNullness K key, Collection<V1> values) {

    final Multimap<K, V1> fromMultimap;
    final EntryTransformer<? super K, ? super V1, V2> transformer;

    TransformedEntriesMultimap(
        Multimap<K, V1> fromMultimap, EntryTransformer<? super K, ? super V1, V2> transformer) {
      this.fromMultimap = checkNotNull(fromMultimap);
      this.transformer = checkNotNull(transformer);
    }

    Collection<V2> transform(@ParametricNullness K key, Collection<V1> values) {

    }

    @Test
    public void test_metaContentMapping() {
        transformer.metaContentMapping = new HashMap<>();
        transformer.metaContentMapping.put("author", "dc:creator");
        transformer.metaContentMapping.put("title", "dc:title");

        assertEquals(2, transformer.metaContentMapping.size());
        assertEquals("dc:creator", transformer.metaContentMapping.get("author"));

        }
    }

    static class ExtensionInterpolator extends MavenTransformer {
        ExtensionInterpolator(UnaryOperator<String> transformer) {
            super(transformer);
        }

        public XmlNode transform(XmlNode node) {
            return super.transform(node);
        }
    }