* source files.
             */
            if (Files.isDirectory(file)) {
                Map<Path, String> names = new HashMap<>();
                try (Stream<Path> subdirs = Files.list(file)) {
                    subdirs.filter(Files::isDirectory).forEach((subdir) -> {
                        Path mf = subdir.resolve(MODULE_INFO);
                        if (Files.isRegularFile(mf)) {

 * for a given artifact and builds a graph of them.
 * The dependencies collection mechanism will not download any artifacts,
 * and only the pom files will be downloaded.
 *
 * @since 4.0.0
 */
@Experimental
public interface DependencyCollector extends Service {

    /**
     * Collects the transitive dependencies and builds a dependency graph.

        /**
         * Run at the beginning of each build. Kill potentially leaked processes in previous builds.
         * Only kill local Gradle processes (classpath in checkout directory).
         * Not clean up global Gradle processes (i.e. classpath in ~/.gradle/...).
         */
        KILL_LEAKED_PROCESSES_FROM_PREVIOUS_BUILDS,
        /**
         * Run at the end of each build. Kill potentially leaked processes in the current build.

    assertEquals("gz", Files.getFileExtension("blah.tar.gz"));
    assertEquals("", Files.getFileExtension("/"));
    assertEquals("", Files.getFileExtension("."));
    assertEquals("", Files.getFileExtension(".."));
    assertEquals("", Files.getFileExtension("..."));
    assertEquals("", Files.getFileExtension("blah"));
    assertEquals("", Files.getFileExtension("blah."));
    assertEquals("", Files.getFileExtension(".blah."));

import org.apache.maven.api.PathType;

/**
 * Cache of {@link PathModularization} instances computed for given {@link Path} elements.
 * The cache is used for avoiding the need to reopen the same files many times when the
 * same dependency is used for different scope. For example a path used for compilation
 * is typically also used for tests.
 */
class PathModularizationCache {
    /**

     */
    boolean isIncludesDependencies();

    /**
     * Types of path (class-path, module-path, …) where the dependency can be placed.
     * For most deterministic builds, the array length should be 1. In such case,
     * the dependency will be unconditionally placed on the specified type of path
     * and no heuristic rule will be involved.
     *

    Node collectDependencies(@Nonnull Project project);

    /**
     * Collects the transitive dependencies of some artifacts and builds a dependency graph. Note that this operation is
     * only concerned about determining the coordinates of the transitive dependencies and does not actually resolve the
     * artifact files.
     * <p>
     * Shortcut for {@code getService(DependencyCollector.class).resolve(...)}
     *

                .build());
    Files.createDirectories(fs.getPath("dir/b/i/j/l"));
    Files.createFile(fs.getPath("dir/a"));
    Files.createFile(fs.getPath("dir/c"));
    Files.createSymbolicLink(fs.getPath("dir/d"), fs.getPath("b/i"));
    Files.createDirectory(fs.getPath("dir/e"));
    Files.createSymbolicLink(fs.getPath("dir/f"), fs.getPath("/dontdelete"));
    Files.createFile(fs.getPath("dir/b/g"));

        try ( SmbFile f = createTestDirectory() ) {
            try {
                SmbFile[] files = f.listFiles(new DosFileFilter("*.txt", 0));
                assertNotNull(files);
                assertEquals(0, files.length);

                files = f.listFiles();
                assertNotNull(files);
                assertEquals(0, files.length);
            }
            finally {
                f.delete();
            }

import java.io.IOException;

/**
 * Tests for {@link Files#fileTraverser()}.
 *
 * @author Jens Nyman
 */

public class FilesFileTraverserTest extends IoTestCase {

  private File rootDir;

  @Override
  public void setUp() throws IOException {
    rootDir = createTempDir();
  }

  public void testFileTraverser_emptyDirectory() throws Exception {