@Experimental
@Immutable
@SuppressWarnings("checkstyle:InterfaceIsType")
public interface Language extends ExtensibleEnum {

    /**
     * The "none" language. It is not versioned, family is same to itself, and compatible with itself only.
     * In turn, every {@link Language} implementation must be compatible with {@code NONE} language.
     */
    Language NONE = language("none");

                new DefaultType(Type.POM, Language.NONE, "pom", null, false),
                new DefaultType(Type.BOM, Language.NONE, "pom", null, false),
                new DefaultType(Type.MAVEN_PLUGIN, Language.JAVA_FAMILY, "jar", null, false, JavaPathType.CLASSES),
                // Java types
                new DefaultType(

    }

    @Override
    public String getLanguage() {
        if (language == null) {
            return "none";
        }

        return language;
    }

    public void setLanguage(final String language) {
        this.language = language;
    }

    @Override
    @Deprecated
    public boolean isAddedToClasspath() {

    private final String id;
    private final Language language;
    private final String extension;
    private final String classifier;
    private final boolean includesDependencies;
    private final Set<PathType> pathTypes;
    private final Map<String, String> properties;

    public DefaultType(
            String id,
            Language language,
            String extension,
            String classifier,

    @Named
    @Singleton
    public static class DefaultLanguageRegistry extends DefaultExtensibleEnumRegistry<Language, LanguageProvider>
            implements LanguageRegistry {

        @Inject
        public DefaultLanguageRegistry(List<LanguageProvider> providers) {
            super(providers, Language.NONE, Language.JAVA_FAMILY);
        }
    }

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api.services;

import org.apache.maven.api.Language;

 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.reflect;

import static com.google.common.base.Preconditions.checkArgument;

 * {@link #putString(CharSequence, Charset)} is generally only useful for cross-language
 * compatibility (otherwise prefer {@link #putUnencodedChars}). However, the character encodings
 * must be identical across languages. Also beware that {@link Charset} definitions may occasionally
 * change between Java releases.
 *

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.api;

import java.util.*;

abstract class ExtensibleEnums {

    static Language language(String id) {
        return new DefaultLanguage(id);
    }

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.internal.impl.resolver;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.apache.maven.api.Language;
import org.apache.maven.api.model.DependencyManagement;