* particular, this interface can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
public interface LegacySupport {

    /**
     * Sets the currently active session. Some legacy components are basically stateful and their API is missing

            throw new IllegalStateException(e);
        }
    }

    private static RepositorySystemSession rss(PlexusContainer c) {
        try {
            LegacySupport legacySupport = c.lookup(LegacySupport.class);

            return legacySupport.getRepositorySession();
        } catch (ComponentLookupException e) {
            throw new IllegalStateException(e);
        }
    }

            ArtifactFactory artifactFactory,
            ProjectBuilder projectBuilder,
            MavenMetadataCache cache,
            LegacySupport legacySupport,
            MavenRepositorySystem mavenRepositorySystem) {
        super(repositoryMetadataManager, artifactFactory, projectBuilder, cache, legacySupport, mavenRepositorySystem);
    }

    private final LegacySupport legacySupport;

    @Inject
    public DefaultPluginManager(
            PlexusContainer container,
            MavenPluginManager pluginManager,
            PluginVersionResolver pluginVersionResolver,
            PluginPrefixResolver pluginPrefixResolver,
            LegacySupport legacySupport) {
        this.container = container;

    // NOTE: This must use a different field name than in the super class or IoC has no chance to inject the loggers
    @Inject
    private Logger log;

    @Inject
    private LegacySupport legacySupport;

    @Inject
    private SettingsDecrypter settingsDecrypter;

    @Inject
    private MirrorSelector mirrorSelector;

    @Inject
    private ArtifactRepositoryFactory artifactRepositoryFactory;

    private final MavenPluginManager mavenPluginManager;
    private final LegacySupport legacySupport;
    private final MojoExecutionScope scope;
    private final MojoExecutionListener mojoExecutionListener;

    @Inject
    public DefaultBuildPluginManager(
            MavenPluginManager mavenPluginManager,
            LegacySupport legacySupport,
            MojoExecutionScope scope,

    @Inject
    private ProjectBuilder projectBuilder;

    @Inject
    private RepositorySystem repositorySystem;

    @Inject
    private LegacySupport legacySupport;

    // ----------------------------------------------------------------------
    // MavenProjectBuilder Implementation
    // ----------------------------------------------------------------------

    private final Logger logger = LoggerFactory.getLogger(getClass());

    private final Lookup lookup;

    private final ExecutionEventCatapult eventCatapult;

    private final LegacySupport legacySupport;

    private final SessionScope sessionScope;

    private final RepositorySystemSessionFactory repositorySessionFactory;

    private final GraphBuilder graphBuilder;

    private ResolutionErrorHandler resolutionErrorHandler;

    @Inject
    private ArtifactMetadataSource source;

    @Inject
    private PlexusContainer container;

    @Inject
    private LegacySupport legacySupport;

    private final Executor executor;

    public DefaultArtifactResolver() {
        int threads = Integer.getInteger("maven.artifact.threads", 5);
        if (threads <= 1) {

import javax.inject.Named;
import javax.inject.Singleton;

import java.util.concurrent.atomic.AtomicReference;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.LegacySupport;
import org.eclipse.aether.RepositorySystemSession;

/**
 * Helps to provide backward-compatibility with plugins that use legacy components. <strong>Warning:</strong> This is an