Class Copyfiles

java.lang.Object

Copyfiles

class Copyfiles
extends java.lang.Object

This class copies files and directories from one directory to another. It can check for differences either by file date or by a byte by byte file compare. Without the -m option it uses byte by byte file compare and does not remove target files or directories that are not in the source directory. With the -m option it uses file dates to determine differences and does remove files target files that do not exist in the source directory. It also sets the dates in the target directory to match the dates in the source directioy.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static java.util.Comparator<java.io.File>	fileComp A comparator on File comparing base names.
(package private) java.lang.String	fromBase
(package private) java.lang.String	toBase

Constructor Summary

Constructors

Constructor and Description
Copyfiles(java.io.File from, java.io.File to) Make two directories equal by recursively copying files with differing content.

Method Summary

Modifier and Type	Method and Description
(package private) void	copyDirectories(java.io.File fromDir, java.io.File toDir) Mirror two directories - both arguments must be directories and the destination directory must exist.
(package private) static boolean	copyFile(java.io.File from, java.io.File to) Copies a file creating or replacing the destination file as necessary.
(package private) static boolean	delete(java.io.File file) This method deletes the specified directory.
(package private) static boolean	equalDate(java.io.File x, java.io.File y) Compare modification times and return true if less than 2 seconds different.
(package private) static boolean	equalFile(java.io.File x, java.io.File y) Does a byte for byte comparison of two files.
static void	main(java.lang.String... args) Copies or mirrors a directory tree.
(package private) static void	mirrorDirectories(java.io.File fromDir, java.io.File toDir) Mirror two directories - both arguments must be directories and the destination directory must exist.
(package private) static java.lang.String	relativePath(java.lang.String prefix, java.lang.String absolute) Return a relative path relative to the given absolute path.

Methods inherited from class java.lang.Object

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

Field Detail

fileComp

static java.util.Comparator<java.io.File> fileComp

A comparator on File comparing base names.

fromBase

java.lang.String fromBase

toBase

java.lang.String toBase

Constructor Detail

Copyfiles

Copyfiles(java.io.File from,
          java.io.File to)

Make two directories equal by recursively copying files with differing content. The file dates are not copied.

Parameters:

from - the source directory for the copy

to - the destination directory for the copy

Method Detail

equalFile

static boolean equalFile(java.io.File x,
                         java.io.File y)

Does a byte for byte comparison of two files. Returns false on any error.

Parameters:

x - first file to compare

y - second file to compare

Returns:

true if the files are exactly the same

equalDate

static boolean equalDate(java.io.File x,
                         java.io.File y)

Compare modification times and return true if less than 2 seconds different. This is to compensate for various precisions in time stamps between opreating systems.

Parameters:

x - first file to compare

y - second file to compare

Returns:

true if the modification times are within 2 seconds of each other

copyFile

static boolean copyFile(java.io.File from,
                        java.io.File to)

Copies a file creating or replacing the destination file as necessary.

Parameters:

from - source file of copy

to - destination file of copy

Returns:

true if no errors

relativePath

static java.lang.String relativePath(java.lang.String prefix,
                                     java.lang.String absolute)

Return a relative path relative to the given absolute path. If the prefix is not a prefix of the absolute path just return the unmodified absolute path.

Parameters:

prefix - the prefix to be stripped off of the path

absolute - the path to be stripped

Returns:

the stripped path

copyDirectories

void copyDirectories(java.io.File fromDir,
                     java.io.File toDir)

Mirror two directories - both arguments must be directories and the destination directory must exist. Dates are not preserved. flag -t update timestamps flag -d delete if not in source directory Currently updates timestamps and deletes if not in source directory as there are no flags yet. 4 cases file, directory, unknown, missing

Parameters:

fromDir - the source directory for the copy

toDir - the destination directory for the copy

mirrorDirectories

static void mirrorDirectories(java.io.File fromDir,
                              java.io.File toDir)

Mirror two directories - both arguments must be directories and the destination directory must exist. Dates are preserved. Equality is checked by comparing dates on files. 4 cases file, directory, unknown, missing

Parameters:

fromDir - the source directory for the copy

toDir - the destination directory for the copy

delete

static boolean delete(java.io.File file)

This method deletes the specified directory. If given a directory it recursively deletes its contents and then the directory. Returns true if successful, otherwise false.

Parameters:

file - the file or directory to be deleted

Returns:

true if file is a directory and there are no errors

main

public static void main(java.lang.String... args)

Copies or mirrors a directory tree. java [-m] sourceDirectory destinationDirectory Without the -m flag does a byte for byte compare and does not delete files in the destination directory. With the -m flag only checks file dates for differences and deletes destination files and directories that do not appear in the source directory hierarchy. Note: file syntax is c:/ etc.

Parameters:

args - the command line arguments.