Java Files.isWritable方法代碼示例

import java.nio.file.Files; //導入方法依賴的package包/類
private static Path createDirectory(Path path) {
    Path createdPath = path;
    if (!Files.exists(path)) {
        try {
            Files.createDirectory(path);
            if (!Files.isWritable(path)) {
                createdPath = null;
            }
        }
        catch (IOException e) {
            String msg = "Unable to create a directory at " + path + ".";
            LoggerFactory.getLogger(Initializer.class).error(msg, e);
            createdPath = null;
        }
    }
    return createdPath;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Returns formatted permissions for current file.
 * @param path Current file.
 * @return Formatted permissions.
 */
private String getPermissions(Path path) {
	char directory = '-';
	if (Files.isDirectory(path))
		directory = 'd';

	char readable = '-';
	if (Files.isReadable(path))
		readable = 'r';

	char writeable = '-';
	if (Files.isWritable(path))
		writeable = 'w';

	char executable = '-';
	if (Files.isExecutable(path))
		executable = 'x';

	return new StringBuilder().append(directory).append(readable)
			.append(writeable).append(executable).toString();
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Check if the provided path is a directory and is readable/writable/executable
 *
 * If the path doesn't exist, attempt to create a directory
 *
 * @param path the path to check
 * @throws IOException if the directory cannot be created or is not accessible
 */
public static void checkWritePath(String path) throws IOException {
  java.nio.file.Path npath = new File(path).toPath();

  // Attempt to create the directory if it doesn't exist
  if (Files.notExists(npath, LinkOption.NOFOLLOW_LINKS)) {
    Files.createDirectories(npath);
    return;
  }

  if (!Files.isDirectory(npath)) {
    throw new IOException(format("path %s is not a directory.", npath));
  }

  if (!Files.isReadable(npath)) {
    throw new IOException(format("path %s is not readable.", npath));
  }

  if (!Files.isWritable(npath)) {
    throw new IOException(format("path %s is not writable.", npath));
  }

  if (!Files.isExecutable(npath)) {
    throw new IOException(format("path %s is not executable.", npath));
  }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private Set<File> performListing(final File directory, final FileFilter filter, final boolean recurseSubdirectories) {
    Path p = directory.toPath();
    if (!Files.isWritable(p) || !Files.isReadable(p)) {
        throw new IllegalStateException("Directory '" + directory + "' does not have sufficient permissions (i.e., not writable and readable)");
    }
    final Set<File> queue = new HashSet<>();
    if (!directory.exists()) {
        return queue;
    }

    final File[] children = directory.listFiles();
    if (children == null) {
        return queue;
    }

    for (final File child : children) {
        if (child.isDirectory()) {
            if (recurseSubdirectories) {
                queue.addAll(performListing(child, filter, recurseSubdirectories));
            }
        } else if (filter.accept(child)) {
            queue.add(child);
        }
    }

    return queue;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private Set<File> performListing(final File directory, final FileFilter filter, final boolean recurseSubdirectories) {
    Path p = directory.toPath();
    if (!Files.isWritable(p) || !Files.isReadable(p)) {
        throw new IllegalStateException("Directory '" + directory + "' does not have sufficient permissions (i.e., not writable and readable)");
    }
    final Set<File> queue = new HashSet<File>();
    if (!directory.exists()) {
        return queue;
    }

    final File[] children = directory.listFiles();
    if (children == null) {
        return queue;
    }

    for (final File child : children) {
        if (child.isDirectory()) {
            if (recurseSubdirectories) {
                queue.addAll(performListing(child, filter, recurseSubdirectories));
            }
        } else if (filter.accept(child)) {
            queue.add(child);
        }
    }

    return queue;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
public Solution(String pathToFile) {

        try {
            Path filePath = Paths.get(pathToFile);
            fileData = new ConcreteFileData(Files.isHidden(filePath), Files.isExecutable(filePath),
                    Files.isDirectory(filePath), Files.isWritable(filePath));

        } catch (Exception e) {
            fileData = new NullFileData (e);
        }
    }
 

import java.nio.file.Files; //導入方法依賴的package包/類
private static void validateDumpDir(Path path) {
    if (!Files.exists(path)) {
        throw new IllegalArgumentException("Directory " + path + " does not exist");
    } else if (!Files.isDirectory(path)) {
        throw new IllegalArgumentException("Path " + path + " is not a directory");
    } else if (!Files.isWritable(path)) {
        throw new IllegalArgumentException("Directory " + path + " is not writable");
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private  boolean isParentWritable(Path path) {
    Path parent = path.getParent();
    if (parent == null) {
        parent = path.toAbsolutePath().getParent();
    }
    return parent != null && Files.isWritable(parent);
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
public static void storeDataSources(List<DataSource> dataSourceList) {
    Path path = Paths.get(dataSourcesStorage);
    if (!Files.isWritable(path)) {
        throw new IllegalStateException("data sources path must be writable");
    }
    try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(path.toAbsolutePath().toString()))) {
        for (DataSource dataSource : dataSourceList) {
            oos.writeObject(dataSource);
        }
        oos.flush();
    } catch (IOException e) {
        e.printStackTrace();
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
protected PathAttributes convert(final java.nio.file.Path file) throws IOException {
    final boolean isPosix = session.isPosixFilesystem();
    final PathAttributes attributes = new PathAttributes();
    final Class<? extends BasicFileAttributes> provider = isPosix ? PosixFileAttributes.class : DosFileAttributes.class;
    final BasicFileAttributes a = Files.readAttributes(file, provider, LinkOption.NOFOLLOW_LINKS);
    if(Files.isRegularFile(file)) {
        attributes.setSize(a.size());
    }
    attributes.setModificationDate(a.lastModifiedTime().toMillis());
    attributes.setCreationDate(a.creationTime().toMillis());
    attributes.setAccessedDate(a.lastAccessTime().toMillis());
    if(isPosix) {
        attributes.setOwner(((PosixFileAttributes) a).owner().getName());
        attributes.setGroup(((PosixFileAttributes) a).group().getName());
        attributes.setPermission(new Permission(PosixFilePermissions.toString(((PosixFileAttributes) a).permissions())));
    }
    else {
        Permission.Action actions = Permission.Action.none;
        if(Files.isReadable(file)) {
            actions = actions.or(Permission.Action.read);
        }
        if(Files.isWritable(file)) {
            actions = actions.or(Permission.Action.write);
        }
        if(Files.isExecutable(file)) {
            actions = actions.or(Permission.Action.execute);
        }
        attributes.setPermission(new Permission(
            actions, Permission.Action.none, Permission.Action.none
        ));
    }
    return attributes;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/** Return true if the file can be written. */
@Override
public boolean canWrite() {
    return Files.isWritable(file);
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private FileFilter createFileFilter(final ProcessContext context) {
    final long minSize = context.getProperty(MIN_SIZE).asDataSize(DataUnit.B).longValue();
    final Double maxSize = context.getProperty(MAX_SIZE).asDataSize(DataUnit.B);
    final long minAge = context.getProperty(MIN_AGE).asTimePeriod(TimeUnit.MILLISECONDS);
    final Long maxAge = context.getProperty(MAX_AGE).asTimePeriod(TimeUnit.MILLISECONDS);
    final boolean ignoreHidden = context.getProperty(IGNORE_HIDDEN_FILES).asBoolean();
    final Pattern filePattern = Pattern.compile(context.getProperty(FILE_FILTER).getValue());
    final String indir = context.getProperty(DIRECTORY).evaluateAttributeExpressions().getValue();
    final boolean recurseDirs = context.getProperty(RECURSE).asBoolean();
    final String pathPatternStr = context.getProperty(PATH_FILTER).getValue();
    final Pattern pathPattern = (!recurseDirs || pathPatternStr == null) ? null : Pattern.compile(pathPatternStr);
    final boolean keepOriginal = context.getProperty(KEEP_SOURCE_FILE).asBoolean();

    return new FileFilter() {
        @Override
        public boolean accept(final File file) {
            if (minSize > file.length()) {
                return false;
            }
            if (maxSize != null && maxSize < file.length()) {
                return false;
            }
            final long fileAge = System.currentTimeMillis() - file.lastModified();
            if (minAge > fileAge) {
                return false;
            }
            if (maxAge != null && maxAge < fileAge) {
                return false;
            }
            if (ignoreHidden && file.isHidden()) {
                return false;
            }
            if (pathPattern != null) {
                Path reldir = Paths.get(indir).relativize(file.toPath()).getParent();
                if (reldir != null && !reldir.toString().isEmpty()) {
                    if (!pathPattern.matcher(reldir.toString()).matches()) {
                        return false;
                    }
                }
            }
            //Verify that we have at least read permissions on the file we're considering grabbing
            if (!Files.isReadable(file.toPath())) {
                return false;
            }

            //Verify that if we're not keeping original that we have write permissions on the directory the file is in
            if (keepOriginal == false && !Files.isWritable(file.toPath().getParent())) {
                return false;
            }
            return filePattern.matcher(file.getName()).matches();
        }
    };
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Setup all the files and directories needed for the tests
 *
 * @return writable directory created that needs to be deleted when done
 * @throws RuntimeException
 */
private static File setup() throws RuntimeException {
    // First do some setup in the temporary directory (using same logic as
    // FileHandler for %t pattern)
    String tmpDir = System.getProperty("java.io.tmpdir"); // i.e. %t
    if (tmpDir == null) {
        tmpDir = System.getProperty("user.home");
    }
    File tmpOrHomeDir = new File(tmpDir);
    // Create a writable directory here (%t/writable-dir)
    File writableDir = new File(tmpOrHomeDir, WRITABLE_DIR);
    if (!createFile(writableDir, true)) {
        throw new RuntimeException("Test setup failed: unable to create"
                + " writable working directory "
                + writableDir.getAbsolutePath() );
    }
    // writableDirectory and its contents will be deleted after the test
    // that uses it

    // Create a plain file which we will attempt to use as a directory
    // (%t/not-a-dir)
    File notAdir = new File(tmpOrHomeDir, NOT_A_DIR);
    if (!createFile(notAdir, false)) {
        throw new RuntimeException("Test setup failed: unable to a plain"
                + " working file " + notAdir.getAbsolutePath() );
    }
    notAdir.deleteOnExit();

    // Create a non-writable directory (%t/non-writable-dir)
    File nonWritableDir = new File(tmpOrHomeDir, NON_WRITABLE_DIR);
    if (!createFile(nonWritableDir, true)) {
        throw new RuntimeException("Test setup failed: unable to create"
                + " a non-"
                + "writable working directory "
                + nonWritableDir.getAbsolutePath() );
    }
    nonWritableDir.deleteOnExit();

    // make it non-writable
    Path path = nonWritableDir.toPath();
    final boolean nonWritable = nonWritableDir.setWritable(false);
    final boolean isWritable = Files.isWritable(path);
    if (nonWritable && !isWritable) {
        runNonWritableDirTest = true;
        System.out.println("Created non writable dir for "
                + getOwner(path) + " at: " + path.toString());
    } else {
        runNonWritableDirTest = false;
        System.out.println( "Test Setup WARNING: unable to make"
                + " working directory " + nonWritableDir.getAbsolutePath()
                + "\n\t non-writable for " + getOwner(path)
                +  " on platform " + System.getProperty("os.name"));
    }

    // make sure non-existent directory really doesn't exist
    File nonExistentDir = new File(tmpOrHomeDir, NON_EXISTENT_DIR);
    if (nonExistentDir.exists()) {
        nonExistentDir.delete();
    }
    System.out.println("Setup completed - writableDir is: " + writableDir.getPath());
    return writableDir;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private GenDotFile genDotFile(Path dir) throws BadArgs {
    if (Files.exists(dir) && (!Files.isDirectory(dir) || !Files.isWritable(dir))) {
        throw new BadArgs("err.invalid.path", dir.toString());
    }
    return new GenDotFile(dir);
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private GenModuleInfo genModuleInfo(Path dir, boolean openModule) throws BadArgs {
    if (Files.exists(dir) && (!Files.isDirectory(dir) || !Files.isWritable(dir))) {
        throw new BadArgs("err.invalid.path", dir.toString());
    }
    return new GenModuleInfo(dir, openModule);
}