Examples with PathMatcher java.nio.file.PathMatcher used on opensource projects

Example 11 with PathMatcher

use of java.nio.file.PathMatcher in project beam by apache.

the class LocalFileSystem method matchOne.

private MatchResult matchOne(String spec) throws IOException {
    File file = Paths.get(spec).toFile();
    if (file.exists()) {
        return MatchResult.create(Status.OK, ImmutableList.of(toMetadata(file)));
    }
    File parent = file.getAbsoluteFile().getParentFile();
    if (!parent.exists()) {
        return MatchResult.create(Status.NOT_FOUND, Collections.<Metadata>emptyList());
    }
    // Method getAbsolutePath() on Windows platform may return something like
    // "c:\temp\file.txt". FileSystem.getPathMatcher() call below will treat
    // '\' (backslash) as an escape character, instead of a directory
    // separator. Replacing backslash with double-backslash solves the problem.
    // We perform the replacement on all platforms, even those that allow
    // backslash as a part of the filename, because Globs.toRegexPattern will
    // eat one backslash.
    String pathToMatch = file.getAbsolutePath().replaceAll(Matcher.quoteReplacement("\\"), Matcher.quoteReplacement("\\\\"));
    final PathMatcher matcher = java.nio.file.FileSystems.getDefault().getPathMatcher("glob:" + pathToMatch);
    // TODO: Avoid iterating all files: https://issues.apache.org/jira/browse/BEAM-1309
    Iterable<File> files = com.google.common.io.Files.fileTreeTraverser().preOrderTraversal(parent);
    Iterable<File> matchedFiles = Iterables.filter(files, Predicates.and(com.google.common.io.Files.isFile(), new Predicate<File>() {

        @Override
        public boolean apply(File input) {
            return matcher.matches(input.toPath());
        }
    }));
    List<Metadata> result = Lists.newLinkedList();
    for (File match : matchedFiles) {
        result.add(toMetadata(match));
    }
    if (result.isEmpty()) {
        // TODO: consider to return Status.OK for globs.
        return MatchResult.create(Status.NOT_FOUND, new FileNotFoundException(String.format("No files found for spec: %s.", spec)));
    } else {
        return MatchResult.create(Status.OK, result);
    }
}

Example 12 with PathMatcher

use of java.nio.file.PathMatcher in project karaf by apache.

the class FilesStream method files.

private static Stream<Path> files(Path cur, String glob) {
    String prefix;
    String rem;
    int idx = glob.lastIndexOf('/');
    if (idx >= 0) {
        prefix = glob.substring(0, idx + 1);
        rem = glob.substring(idx + 1);
    } else {
        prefix = "";
        rem = glob;
    }
    Path dir = cur.resolve(prefix);
    final PathMatcher matcher = dir.getFileSystem().getPathMatcher("glob:" + rem);
    Stream.Builder<Path> stream = Stream.builder();
    try {
        Files.walkFileTree(dir, EnumSet.of(FileVisitOption.FOLLOW_LINKS), Integer.MAX_VALUE, new FileVisitor<Path>() {

            @Override
            public FileVisitResult preVisitDirectory(Path file, BasicFileAttributes attrs) throws IOException {
                if (file.equals(dir)) {
                    return FileVisitResult.CONTINUE;
                }
                if (Files.isHidden(file)) {
                    return FileVisitResult.SKIP_SUBTREE;
                }
                Path r = dir.relativize(file);
                if (matcher.matches(r)) {
                    stream.add(file);
                }
                return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                if (!Files.isHidden(file)) {
                    Path r = dir.relativize(file);
                    if (matcher.matches(r)) {
                        stream.add(file);
                    }
                }
                return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException {
                return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
                return FileVisitResult.CONTINUE;
            }
        });
    } catch (IOException e) {
        LOGGER.warn("Error generating filenames", e);
    }
    return stream.build();
}

Example 13 with PathMatcher

use of java.nio.file.PathMatcher in project heron by twitter.

the class TopologyUtils method lookUpTopologyDefnFile.

public static String lookUpTopologyDefnFile(String dir, String filename) {
    String pattern = String.format("glob:%s/%s.defn", dir, filename);
    PathMatcher matcher = FileSystems.getDefault().getPathMatcher(pattern);
    for (File file : new File(dir).listFiles()) {
        if (matcher.matches(file.toPath())) {
            // We would return the first one matched
            return file.getPath();
        }
    }
    throw new IllegalStateException("Failed to find topology defn file");
}

Example 14 with PathMatcher

use of java.nio.file.PathMatcher in project google-cloud-java by GoogleCloudPlatform.

the class CloudStorageFileSystemTest method testMatcher.

@Test
public void testMatcher() throws IOException {
    try (FileSystem fs = CloudStorageFileSystem.forBucket("bucket")) {
        String pattern1 = "glob:*.java";
        PathMatcher javaFileMatcher = fs.getPathMatcher(pattern1);
        assertMatches(fs, javaFileMatcher, "a.java", true);
        assertMatches(fs, javaFileMatcher, "a.text", false);
        assertMatches(fs, javaFileMatcher, "folder/c.java", true);
        assertMatches(fs, javaFileMatcher, "d", false);
        String pattern2 = "glob:*.{java,text}";
        PathMatcher javaAndTextFileMatcher = fs.getPathMatcher(pattern2);
        assertMatches(fs, javaAndTextFileMatcher, "a.java", true);
        assertMatches(fs, javaAndTextFileMatcher, "a.text", true);
        assertMatches(fs, javaAndTextFileMatcher, "folder/c.java", true);
        assertMatches(fs, javaAndTextFileMatcher, "d", false);
    }
}

Example 15 with PathMatcher

use of java.nio.file.PathMatcher in project cdap by caskdata.

the class SparkPackageUtils method getSpark1AssemblyJar.

/**
   * Locates the spark-assembly jar from the local file system for Spark1.
   *
   * @param sparkLibrary file path to the spark-assembly jar in the local file system
   * @param sparkHome file path to the spark home.
   *
   * @return the spark-assembly jar location
   * @throws IllegalStateException if cannot locate the spark assembly jar
   */
private static File getSpark1AssemblyJar(@Nullable String sparkLibrary, String sparkHome) {
    if (sparkLibrary != null) {
        return new File(sparkLibrary);
    }
    // Look for spark-assembly.jar symlink
    Path assemblyJar = Paths.get(sparkHome, "lib", "spark-assembly.jar");
    if (Files.isSymbolicLink(assemblyJar)) {
        return assemblyJar.toFile();
    }
    // No symbolic link exists. Search for spark-assembly*.jar in the lib directory
    final List<Path> jar = new ArrayList<>(1);
    Path sparkLib = Paths.get(sparkHome, "lib");
    final PathMatcher pathMatcher = sparkLib.getFileSystem().getPathMatcher("glob:spark-assembly*.jar");
    try {
        Files.walkFileTree(sparkLib, new SimpleFileVisitor<Path>() {

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                // Take the first file match
                if (attrs.isRegularFile() && pathMatcher.matches(file.getFileName())) {
                    jar.add(file);
                    return FileVisitResult.TERMINATE;
                }
                return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException {
                // Ignore error
                return FileVisitResult.CONTINUE;
            }
        });
    } catch (IOException e) {
        // Just log, don't throw.
        // If we already located the Spark Assembly jar during visiting, we can still use the jar.
        LOG.warn("Exception raised while inspecting {}", sparkLib, e);
    }
    Preconditions.checkState(!jar.isEmpty(), "Failed to locate Spark library from %s", sparkHome);
    assemblyJar = jar.get(0);
    LOG.debug("Located Spark Assembly JAR in {}", assemblyJar);
    return assemblyJar.toFile();
}