currentStream.write(b, off, len);
                currentStream.notifyAll();
            }
        }

        @Override
        public void close() {
            getOutputStreamForCurrentThread().close();
        }

        @Override
        public void flush() {
            getOutputStreamForCurrentThread().flush();
        }

        @Override

            throws IOException;

    /**
     * Calculates checksums for specified stream. Upon this method returns, the stream will be depleted (fully read)
     * but not closed.
     *
     * @param stream      The stream for which to calculate checksums, must not be {@code null}.
     * @param algorithms  The checksum algorithms to use, must not be {@code null}.

 * constructed instance. To create session out of builder, use {@link SessionBuilder#build()}. For proper closing
 * of sessions, use {@link CloseableSession#close()} method on built instance(s).
 * <p>
 * Extend this class and override methods to customize, if needed.
 *
 * @since 4.0.0
 */
public class MavenSessionBuilderSupplier implements Supplier<SessionBuilder> {

    }

    @Override
    public MavenSession clone() {
        try {
            MavenSession clone = (MavenSession) super.clone();
            // the default must become the current project of the thread that clones this
            MavenProject current = getCurrentProject();
            // we replace the thread local of the clone to prevent write through and enforce the new default value

                .setBaseDirectory(new File(""))
                .setLocalRepository(repo);

        DefaultRepositorySystemSession repositorySession =
                new DefaultRepositorySystemSession(h -> false); // no close handle
        repositorySession.setLocalRepositoryManager(new SimpleLocalRepositoryManagerFactory()
                .newInstance(repositorySession, new LocalRepository(repo.getUrl())));
        MavenSession session =

                        setCorePoolSize(parallelism + parked.decrementAndGet());
                    }
                }
            };
        }

        @Override
        public void close() {
            this.executor.shutdownNow();
        }

        private int getParallelism(ProjectBuildingRequest request) {
            int parallelism = DEFAULT_BUILDER_PARALLELISM;
            try {

 * their lifecycle is shared as well: once supplied repository system is shut-down, this instance becomes closed as
 * well. Any subsequent {@code getXXX} method invocation attempt will fail with {@link IllegalStateException}.
 */
public class RepositorySystemSupplier implements Supplier<RepositorySystem> {
    private final AtomicBoolean closed = new AtomicBoolean(false);

    public RepositorySystemSupplier() {}

    public Optional<Project> getExecutionProject(Project project) {
        // Session keep tracks of the Project per project id,
        // so we cannot use session.getProject(p) for forked projects
        // which are temporary clones
        return Optional.ofNullable(getMavenProject(project).getExecutionProject())
                .map(p -> new DefaultProject(session, p));
    }

    private MavenProject getMavenProject(Project project) {

import org.apache.maven.artifact.ArtifactScopeEnum;

/**
 * Default conflict resolver.Implements closer newer first policy by default, but could be configured via plexus
 *
 */
@Named
@Singleton
@Deprecated
public class DefaultGraphConflictResolver implements GraphConflictResolver {
    /**
     * artifact, closer to the entry point, is selected
     */
    @Inject
    protected GraphConflictResolutionPolicy policy;

        requireNonNull(charset, "charset is null");
        putBytes(source.getBytes(charset), relativeTarget);
    }

    @Override
    public void close() {
        transporter.close();
    }