Examples of java.nio.file.FileSystem

java.nio.file.FileSystem
Provides an interface to a file system and is the factory for objects to access files and other objects in the file system.
The default file system, obtained by invoking the {@link FileSystems#getDefault FileSystems.getDefault} method, provides access to the file system that isaccessible to the Java virtual machine. The {@link FileSystems} class definesmethods to create file systems that provide access to other types of (custom) file systems.
A file system is the factory for several types of objects:
- The {@link #getPath getPath} method converts a system dependentpath string, returning a {@link Path} object that may be usedto locate and access a file.
- The {@link #getPathMatcher getPathMatcher} method is usedto create a {@link PathMatcher} that performs match operations onpaths.
- The {@link #getFileStores getFileStores} method returns an iteratorover the underlying {@link FileStore file-stores}.
- The {@link #getUserPrincipalLookupService getUserPrincipalLookupService}method returns the {@link UserPrincipalLookupService} to lookup users orgroups by name.
- The {@link #newWatchService newWatchService} method creates a{@link WatchService} that may be used to watch objects for changes andevents.
File systems vary greatly. In some cases the file system is a single hierarchy of files with one top-level root directory. In other cases it may have several distinct file hierarchies, each with its own top-level root directory. The {@link #getRootDirectories getRootDirectories} method may beused to iterate over the root directories in the file system. A file system is typically composed of one or more underlying {@link FileStore file-stores}that provide the storage for the files. Theses file stores can also vary in the features they support, and the file attributes or meta-data that they associate with files.
A file system is open upon creation and can be closed by invoking its {@link #close() close} method. Once closed, any further attempt to accessobjects in the file system cause {@link ClosedFileSystemException} to bethrown. File systems created by the default {@link FileSystemProvider provider}cannot be closed.
A {@code FileSystem} can provide read-only or read-write access to thefile system. Whether or not a file system provides read-only access is established when the {@code FileSystem} is created and can be tested by invokingits {@link #isReadOnly() isReadOnly} method. Attempts to write to file storesby means of an object associated with a read-only file system throws {@link ReadOnlyFileSystemException}.
File systems are safe for use by multiple concurrent threads. The {@link #close close} method may be invoked at any time to close a file system butwhether a file system is asynchronously closeable is provider specific and therefore unspecified. In other words, if a thread is accessing an object in a file system, and another thread invokes the {@code close} methodthen it may require to block until the first operation is complete. Closing a file system causes all open channels, watch services, and other {@link Closeable closeable} objects associated with the file system to be closed. @since 1.7

    assertThat(config.defaultAttributeValues).isEmpty();
  }


  @Test
  public void testFileSystemForDefaultOsXConfiguration() throws IOException {
    FileSystem fs = Jimfs.newFileSystem(Configuration.osX());


    assertThat(fs.getRootDirectories())
        .containsExactlyElementsIn(ImmutableList.of(fs.getPath("/")))
        .inOrder();
    assertThatPath(fs.getPath("").toRealPath()).isEqualTo(fs.getPath("/work"));
    assertThat(Iterables.getOnlyElement(fs.getFileStores()).getTotalSpace()).isEqualTo(
        4L * 1024 * 1024 * 1024);
    assertThat(fs.supportedFileAttributeViews()).containsExactly("basic");


    Files.createFile(fs.getPath("/foo"));


    try {
      Files.createFile(fs.getPath("/FOO"));
      fail();
    } catch (FileAlreadyExistsException expected) {
    }
  }

View Full Code Here

    assertThat(config.defaultAttributeValues).isEmpty();
  }


  @Test
  public void testFileSystemForDefaultWindowsConfiguration() throws IOException {
    FileSystem fs = Jimfs.newFileSystem(Configuration.windows());


    assertThat(fs.getRootDirectories())
        .containsExactlyElementsIn(ImmutableList.of(fs.getPath("C:\\")))
        .inOrder();
    assertThatPath(fs.getPath("").toRealPath()).isEqualTo(fs.getPath("C:\\work"));
    assertThat(Iterables.getOnlyElement(fs.getFileStores()).getTotalSpace()).isEqualTo(
        4L * 1024 * 1024 * 1024);
    assertThat(fs.supportedFileAttributeViews()).containsExactly("basic");


    Files.createFile(fs.getPath("C:\\foo"));


    try {
      Files.createFile(fs.getPath("C:\\FOO"));
      fail();
    } catch (FileAlreadyExistsException expected) {
    }
  }

View Full Code Here

        .setAttributeViews("unix")
        .setDefaultAttributeValue(
            "posix:permissions", PosixFilePermissions.fromString("---------"))
        .build();


    FileSystem fs = Jimfs.newFileSystem(config);


    assertThat(fs.getRootDirectories())
        .containsExactlyElementsIn(ImmutableList.of(fs.getPath("/")))
        .inOrder();
    assertThatPath(fs.getPath("").toRealPath()).isEqualTo(fs.getPath("/hello/world"));
    assertThat(Iterables.getOnlyElement(fs.getFileStores()).getTotalSpace()).is(100);
    assertThat(fs.supportedFileAttributeViews()).containsExactly("basic", "owner", "posix", "unix");


    Files.createFile(fs.getPath("/foo"));
    assertThat(Files.getAttribute(fs.getPath("/foo"), "posix:permissions")).isEqualTo(
        PosixFilePermissions.fromString("---------"));


    try {
      Files.createFile(fs.getPath("/FOO"));
      fail();
    } catch (FileAlreadyExistsException expected) {
    }
  }

View Full Code Here

  protected String valueToString(Path value) throws PreferencesException
  {
    //Saving
    
    //If this is the local file system then just write the path in its string form
    FileSystem fs = value.getFileSystem();
    if (FileSystems.getDefault().equals(fs))
      return(value.toString());
    
    //Special file system handling
    String result = pathToStringForSpecialFileSystem(value);

View Full Code Here

     * @param aSessionHashCode A session hash code
     * @param aRemoteClient The remote endpoint
     * @throws IOException If there is a problem reading or writing
     */
    public LogWatcherThread(String aLogPath, int aSessionHashCode, RemoteEndpoint aRemoteClient) throws IOException {
        FileSystem fs = FileSystems.getDefault();
        Path logPath = fs.getPath(aLogPath);


        if (LOGGER.isInfoEnabled()) {
            LOGGER.info("[{}] Initializing new {} to monitor file system at {}", aSessionHashCode,
                    LogWatcherThread.class.getSimpleName(), aLogPath);
        }


        // Start the new watch service for our log files
        myWatchService = fs.newWatchService();
        myKeys = new ConcurrentHashMap<WatchKey, Path>();
        mySessionHashCode = aSessionHashCode;


        // Register the path of the log files with our watch service
        myKeys.put(logPath.register(myWatchService, ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY), logPath);

View Full Code Here


        final Path pathDir;
        if (isDirectory(path))
            pathDir = path;
        else {
            FileSystem fs = getFileSystem(path);
            if (fs == null)
                return;
            pathDir = fs.getRootDirectories().iterator().next();
        }
        String sep = path.getFileSystem().getSeparator();
        Path packageDir = packageName.isEmpty() ? pathDir
                : pathDir.resolve(packageName.replace(".", sep));
        if (!Files.exists(packageDir))

View Full Code Here

            if (isDirectory(p)) {
                Path f = resolve(p, relativePath);
                if (Files.exists(f))
                    return PathFileObject.createDirectoryPathFileObject(this, f, p);
            } else {
                FileSystem fs = getFileSystem(p);
                if (fs != null) {
                    Path file = getPath(fs, relativePath);
                    if (Files.exists(file))
                        return PathFileObject.createJarPathFileObject(this, file);
                }

View Full Code Here


        return ((PathFileObject) fo).inferBinaryName(paths);
    }


    private FileSystem getFileSystem(Path p) throws IOException {
        FileSystem fs = fileSystems.get(p);
        if (fs == null) {
            fs = FileSystems.newFileSystem(p, null);
            fileSystems.put(p, fs);
        }
        return fs;

View Full Code Here

    private static Path getPath(FileSystem fs, String relativePath) {
        return fs.getPath(relativePath.replace("/", fs.getSeparator()));
    }


    private static Path resolve(Path base, String relativePath) {
        FileSystem fs = base.getFileSystem();
        Path rp = fs.getPath(relativePath.replace("/", fs.getSeparator()));
        return base.resolve(rp);
    }

View Full Code Here

            return true;
        }


        @Override
        public List<Copy> getResources(Environment env) {
            FileSystem fs = FileSystems.getDefault();
            List<Copy> result = new ArrayList<>();
            result.add(substituting("source",
                    fs.getPathMatcher("glob:**"), 
                    new Template("@[source.folder]/@[module.dir]").eval(env)));
            
            if ("true".equals(env.get("ant"))) {
                result.add(substituting("ant", "build.xml", "."));
            }
            if ("true".equals(env.get("eclipse"))) {
                result.add(substituting("eclipse",
                        fs.getPathMatcher("glob:**"),
                        "."));
            }
            return result;
        }

View Full Code Here

0 1 2 3 4

TOP

Related Classes of java.nio.file.FileSystem

au.net.causal.projo.prefs.transform.PathToStringTransformer

br.com.mystudies.niotwo.FilesFilter

ch.inftec.ju.util.libs.NioTest

com.bluelotussoftware.service.LogService

com.github.mustachejava.inverter.InvertUtils

com.google.common.jimfs.ConfigurationTest

com.google.common.jimfs.JimfsUnixLikeFileSystemTest

com.google.common.jimfs.RegexGlobMatcherTest

com.google.javascript.jscomp.CommandLineRunner$Flags

com.oracle.truffle.r.nodes.builtin.base.DotLibpaths

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.