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.

Author:

Lionel Cons <lionel.cons@cern.ch>, Massimo Paladin <massimo.paladin@gmail.com> Copyright (C) CERN 2012-2016

Field Summary

Fields

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

Method Summary

Modifier and Type	Method and 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(Path path) Return a unique string identifying the given path object.
static String	fileKey(String path) Return a unique string identifying the given path string.
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(Path path) Read all the bytes from a path object.
static byte[]	readToByteArray(String path) Read all the bytes from a path string.
static String	readToString(File file) Read a UTF-8 string from a file object.
static String	readToString(Path path) Read a UTF-8 string from a path object.
static String	readToString(String path) Read a UTF-8 string from a path string.
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(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.
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.

Methods inherited from class java.lang.Object

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

Field Detail

S_IRWXU

public static final int S_IRWXU

See Also:

Constant Field Values

S_IRUSR

public static final int S_IRUSR

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Constant Field Values

S_IWUSR

public static final int S_IWUSR

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Constant Field Values

S_IXUSR

public static final int S_IXUSR

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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

Method Detail

posixPermissionsFromInteger

public static Set<PosixFilePermission> posixPermissionsFromInteger(int perm)

Create NIO POSIX file permissions from numerical POSIX permissions.

fileAttributesFromInteger

public static FileAttribute<?> fileAttributesFromInteger(int perm)

Create NIO file attributes from numerical POSIX permissions.

fileKey

public static String fileKey(File file)
                      throws IOException

Return a unique string identifying the given file object.

Throws:

IOException

fileKey

public static String fileKey(String path)
                      throws IOException

Return a unique string identifying the given path string.

Throws:

IOException

fileKey

public static String fileKey(Path path)
                      throws IOException

Return a unique string identifying the given path object.

Throws:

IOException

writeToFile

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

Write a UTF-8 string to a file object.

Throws:

IOException

writeToFile

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

Write a UTF-8 string to a path string.

Throws:

IOException

writeToFile

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

Write a UTF-8 string to a path object.

Throws:

IOException

writeToFile

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

Write bytes to a file object.

Throws:

IOException

writeToFile

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

Write bytes to a path string.

Throws:

IOException

writeToFile

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

Write bytes to a path object.

Throws:

IOException

readToString

public static String readToString(File file)
                           throws IOException

Read a UTF-8 string from a file object.

Throws:

IOException

readToString

public static String readToString(String path)
                           throws IOException

Read a UTF-8 string from a path string.

Throws:

IOException

readToString

public static String readToString(Path path)
                           throws IOException

Read a UTF-8 string from a path object.

Throws:

IOException

readToByteArray

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

Read all the bytes from a file object.

Throws:

IOException

readToByteArray

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

Read all the bytes from a path string.

Throws:

IOException

readToByteArray

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

Read all the bytes from a path object.

Throws:

IOException

recursiveDelete

public static boolean recursiveDelete(File path)

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