} catch (AuthorizationException e) {
            throw new TransferFailedException("Authorization failed: " + e.getMessage(), e);
        } finally {
            // Remove remaining TransferListener instances (checksum handlers removed in above finally clause)
            if (downloadMonitor != null) {
                wagon.removeTransferListener(downloadMonitor);
            }

            disconnectWagon(wagon);

* Reference Documentation

 * {{{./lifecycles.html}lifecycles}} and {{{./default-bindings.html}plugin bindings to <<<default>>> lifecycle}},

 * {{{./artifact-handlers.html}default artifact handlers}}, to manage {{{../maven-model/maven.html#class_dependency}dependency types}},

 * {{{./extension.html}extension descriptor}} and {{{./core-extensions.html}core extensions}},

package org.apache.maven.api.services.model;

import org.apache.maven.api.model.Model;
import org.apache.maven.api.services.ModelBuilderRequest;
import org.apache.maven.api.services.ModelProblemCollector;

/**
 * Handles normalization of a model. In this context, normalization is the process of producing a canonical
 * representation for models that physically look different but are semantically equivalent.
 *
 */

import java.nio.file.Files;
import java.util.Map;
import java.util.Objects;

import org.apache.maven.artifact.repository.metadata.Metadata;
import org.apache.maven.metadata.v4.MetadataStaxReader;

/**
 * Handles deserialization of metadata from some kind of textual format like XML.
 *
 */
@Named
@Singleton
public class DefaultMetadataReader implements MetadataReader {

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

import org.apache.maven.internal.impl.SettingsUtilsV4;

/**
 * Several convenience methods to handle settings
 *
 */
public final class SettingsUtils {

    private SettingsUtils() {
        // don't allow construction.
    }

    /**
     * @param dominant
     * @param recessive

                request.addArtifact(pomArtifact);
            } else if (metadata instanceof SnapshotArtifactRepositoryMetadata
                    || metadata instanceof ArtifactRepositoryMetadata) {
                // eaten, handled by repo system
            } else {
                request.addMetadata(new MetadataBridge(metadata));
            }
        }

        try {
            repoSystem.install(session, request);

import org.apache.maven.model.building.ModelProblemCollector;
import org.apache.maven.model.building.ModelProblemCollectorRequest;
import org.apache.maven.model.merge.MavenModelMerger;

/**
 * Handles injection of plugin executions induced by the lifecycle bindings for a packaging.
 *
 */
@Named
@Singleton
public class DefaultLifecycleBindingsInjector implements LifecycleBindingsInjector {

          <version>1.0.0</version>
          <description>How to handle downloading of releases from this repository</description>
          <association>
            <type>RepositoryPolicy</type>
          </association>
        </field>
        <field>
          <name>snapshots</name>
          <version>1.0.0</version>
          <description>How to handle downloading of snapshots from this repository</description>

                    /*
                     * Most existing extensions don't define exported packages, i.e. no classes are to be exposed to
                     * plugins, yet the components provided by the extension (e.g. artifact handlers) must be
                     * accessible, i.e. we still must import the extension realm into the project realm.
                     */
                    exports = Arrays.asList(extensionRealm.getId());
                }

                            of the local repository. This is especially troublesome during snapshot resolution so we try
                            to handle that gracefully.
                             */
                            if (versioning != null
                                    && repository instanceof LocalRepository