* to the build path.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface Type extends ExtensibleEnum {
    /**
     * Artifact type name for a POM file.
     */
    String POM = "pom";

    /**
     * Artifact type name for a BOM file.
     */
    String BOM = "bom";

    /**
     * Artifact type name for a JAR file that can be placed either on the class-path or on the module-path.

    public static final int SID_TYPE_ALIAS = 4;

    public static final int SID_TYPE_DELETED = 6;

    public static final int SID_TYPE_DOM_GRP = 2;

    public static final int SID_TYPE_DOMAIN = 3;

    public static final int SID_TYPE_INVALID = 7;

    public static final int SID_TYPE_UNKNOWN = 8;

    public static final int SID_TYPE_USE_NONE = 0;

    public static final int SID_TYPE_USER = 1;

            return FormatType.FAVORITE;
        }
        if (FormatType.FAVORITES.name().equals(type)) {
            return FormatType.FAVORITES;
        }
        if (FormatType.PING.name().equals(type)) {
            return FormatType.PING;
        }
        if (FormatType.SCROLL.name().equals(type)) {
            return FormatType.SCROLL;
        }
        if (FormatType.SUGGEST.name().equals(type)) {

    @Override
    public Collection<Type> provides() {
        return (Collection) types();
    }

    public Collection<DefaultType> types() {
        return Arrays.asList(
                // Maven types
                new DefaultType(Type.POM, Language.NONE, "pom", null, false),
                new DefaultType(Type.BOM, Language.NONE, "pom", null, false),

import org.apache.maven.api.Type;
import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 * Access to {@link Type} registry.
 *
 * @since 4.0.0
 */
@Experimental
public interface TypeRegistry extends ExtensibleEnumRegistry<Type> {

    /**
     * Obtain the {@link Type} from the specified {@code id}.
     * If no type is known for {@code id}, the registry will

     */
    @Deprecated
    public DefaultArtifactHandler() {
        this.type = null;
    }

    public DefaultArtifactHandler(final String type) {
        this(type, null, null, null, null, false, null, false);
    }

    @SuppressWarnings("checkstyle:ParameterNumber")
    public DefaultArtifactHandler(
            final String type,
            final String extension,
            final String classifier,

        final Class<?> rowClass = getActualClass(type, map);
        if (rowClass == null) {
            return null;
        }
        final ParameterizedClassDescImpl desc = new ParameterizedClassDescImpl(rowClass);
        final Type[] parameterTypes = getGenericParameters(type);
        if (parameterTypes == null) {

     * @param <T> the type of the object associated to this key
     */
    final class Key<T> {

        private final Class<T> type;
        private final Object id;

        private Key(Class<T> type, Object id) {
            this.type = type;
            this.id = id;
        }

        public Class<T> type() {
            return type;
        }

        @Override

      Class<? super @NonNull E> type, E[] emptyArrayForContents, Iterable<? extends E> contents) {
    List<E> setContents = new ArrayList<>();
    for (E e : contents) {
      if (!setContents.contains(e)) {
        setContents.add(e);
      }
    }
    return new MinimalSet<>(type, setContents.toArray(emptyArrayForContents));
  }

  private MinimalSet(Class<? super @NonNull E> type, E... contents) {

      Class<? super @NonNull E> type, E[] emptyArrayForContents, Iterable<? extends E> contents) {
    List<E> setContents = new ArrayList<>();
    for (E e : contents) {
      if (!setContents.contains(e)) {
        setContents.add(e);
      }
    }
    return new MinimalSet<>(type, setContents.toArray(emptyArrayForContents));
  }

  private MinimalSet(Class<? super @NonNull E> type, E... contents) {