Package ch.cern.dirq

Class FileUtils

java.lang.Object

ch.cern.dirq.FileUtils

public final class FileUtils
extends Object

Convenient file related utilities.
This is a private class to be used only by the directory queue classes. Its API can change at any time without any notice.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	S_IRGRP
static final int	S_IROTH
static final int	S_IRUSR
static final int	S_IRWXG
static final int	S_IRWXO
static final int	S_IRWXU
static final int	S_IWGRP
static final int	S_IWOTH
static final int	S_IWUSR
static final int	S_IXGRP
static final int	S_IXOTH
static final int	S_IXUSR

Constructor Summary

Constructors

Modifier	Constructor	Description
private	FileUtils()

Method Summary

Modifier and Type	Method	Description
static FileAttribute<?>	fileAttributesFromInteger(int perm)	Create NIO file attributes from numerical POSIX permissions.
static String	fileKey(File file)	Return a unique string identifying the given file object.
static String	fileKey(String path)	Return a unique string identifying the given path string.
static String	fileKey(Path path)	Return a unique string identifying the given path object.
private static boolean	isSet(int perm, int bit)
static Set<PosixFilePermission>	posixPermissionsFromInteger(int perm)	Create NIO POSIX file permissions from numerical POSIX permissions.
static byte[]	readToByteArray(File file)	Read all the bytes from a file object.
static byte[]	readToByteArray(String path)	Read all the bytes from a path string.
static byte[]	readToByteArray(Path path)	Read all the bytes from a path object.
static String	readToString(File file)	Read a UTF-8 string from a file object.
static String	readToString(String path)	Read a UTF-8 string from a path string.
static String	readToString(Path path)	Read a UTF-8 string from a path object.
static boolean	recursiveDelete(File path)	Recursively delete the given path, stopping on the first error.
static void	writeToFile(File file, byte[] data)	Write bytes to a file object.
static void	writeToFile(File file, String data)	Write a UTF-8 string to a file object.
static void	writeToFile(String path, byte[] data)	Write bytes to a path string.
static void	writeToFile(String path, String data)	Write a UTF-8 string to a path string.
static void	writeToFile(Path path, byte[] data)	Write bytes to a path object.
static void	writeToFile(Path path, String data)	Write a UTF-8 string to a path object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

S_IRWXU

public static final int S_IRWXU

See Also:

• Constant Field Values

S_IRUSR

public static final int S_IRUSR

See Also:

• Constant Field Values

S_IWUSR

public static final int S_IWUSR

See Also:

• Constant Field Values

S_IXUSR

public static final int S_IXUSR

See Also:

• Constant Field Values

S_IRWXG

public static final int S_IRWXG

See Also:

• Constant Field Values

S_IRGRP

public static final int S_IRGRP

See Also:

• Constant Field Values

S_IWGRP

public static final int S_IWGRP

See Also:

• Constant Field Values

S_IXGRP

public static final int S_IXGRP

See Also:

• Constant Field Values

S_IRWXO

public static final int S_IRWXO

See Also:

• Constant Field Values

S_IROTH

public static final int S_IROTH

See Also:

• Constant Field Values

S_IWOTH

public static final int S_IWOTH

See Also:

• Constant Field Values

S_IXOTH

public static final int S_IXOTH

See Also:

• Constant Field Values

Constructor Details

FileUtils

private FileUtils()

Method Details

isSet

private static boolean isSet(int perm,
 int bit)

posixPermissionsFromInteger

public static Set<PosixFilePermission> posixPermissionsFromInteger(int perm)

Create NIO POSIX file permissions from numerical POSIX permissions.

Parameters:

perm - numerical permissions

Returns:

file permissions

fileAttributesFromInteger

public static FileAttribute<?> fileAttributesFromInteger(int perm)

Create NIO file attributes from numerical POSIX permissions.

Parameters:

perm - numerical permissions

Returns:

file attributes

fileKey

public static String fileKey(File file)
                      throws IOException

Return a unique string identifying the given file object.

Parameters:

file - file object

Returns:

unique string

Throws:

IOException - if any file operation fails

fileKey

public static String fileKey(String path)
                      throws IOException

Return a unique string identifying the given path string.

Parameters:

path - file path string

Returns:

unique string

Throws:

IOException - if any file operation fails

fileKey

public static String fileKey(Path path)
                      throws IOException

Return a unique string identifying the given path object.

Parameters:

path - file path object

Returns:

unique string

Throws:

IOException - if any file operation fails

writeToFile

public static void writeToFile(File file,
 String data)
                        throws IOException

Write a UTF-8 string to a file object.

Parameters:

file - file object

data - UTF-8 string

Throws:

IOException - if any file operation fails

writeToFile

public static void writeToFile(String path,
 String data)
                        throws IOException

Write a UTF-8 string to a path string.

Parameters:

path - file path string

data - UTF-8 string

Throws:

IOException - if any file operation fails

writeToFile

public static void writeToFile(Path path,
 String data)
                        throws IOException

Write a UTF-8 string to a path object.

Parameters:

path - file path object

data - UTF-8 string

Throws:

IOException - if any file operation fails

writeToFile

public static void writeToFile(File file,
 byte[] data)
                        throws IOException

Write bytes to a file object.

Parameters:

file - file object

data - bytes

Throws:

IOException - if any file operation fails

writeToFile

public static void writeToFile(String path,
 byte[] data)
                        throws IOException

Write bytes to a path string.

Parameters:

path - file path string

data - bytes

Throws:

IOException - if any file operation fails

writeToFile

public static void writeToFile(Path path,
 byte[] data)
                        throws IOException

Write bytes to a path object.

Parameters:

path - file path object

data - bytes

Throws:

IOException - if any file operation fails

readToString

public static String readToString(File file)
                           throws IOException

Read a UTF-8 string from a file object.

Parameters:

file - file object

Returns:

UTF-8 string

Throws:

IOException - if any file operation fails

readToString

public static String readToString(String path)
                           throws IOException

Read a UTF-8 string from a path string.

Parameters:

path - file path string

Returns:

UTF-8 string

Throws:

IOException - if any file operation fails

readToString

public static String readToString(Path path)
                           throws IOException

Read a UTF-8 string from a path object.

Parameters:

path - file path object

Returns:

UTF-8 string

Throws:

IOException - if any file operation fails

readToByteArray

public static byte[] readToByteArray(File file)
                              throws IOException

Read all the bytes from a file object.

Parameters:

file - file object

Returns:

bytes

Throws:

IOException - if any file operation fails

readToByteArray

public static byte[] readToByteArray(String path)
                              throws IOException

Read all the bytes from a path string.

Parameters:

path - file path string

Returns:

bytes

Throws:

IOException - if any file operation fails

readToByteArray

public static byte[] readToByteArray(Path path)
                              throws IOException

Read all the bytes from a path object.

Parameters:

path - file path object

Returns:

bytes

Throws:

IOException - if any file operation fails

recursiveDelete

public static boolean recursiveDelete(File path)

Recursively delete the given path, stopping on the first error.

Parameters:

path - file object

Returns:

true if delete succeeded