com.redhat.rhn.common.util

Class FileUtils

java.lang.Object

com.redhat.rhn.common.util.FileUtils

public class FileUtils
extends java.lang.Object

Simple file utilities to read/write strings to a file on disk.

Method Summary

Modifier and Type	Method and Description
static java.lang.String	getTailOfFile(java.lang.String pathToFile, java.lang.Integer lines) Reads and returns the last n lines from a given file as string.
static byte[]	readByteArrayFromFile(java.io.File fileToRead, long start, long end) Read a file off disk into a byte array with specified range This can use lots of memory if you read a large file
static java.lang.String	readStringFromFile(java.lang.String path) Read a file off disk into a String and return it.
static void	writeStringToFile(java.lang.String contents, java.lang.String path) Save a String to a file on disk using specified path.

Methods inherited from class java.lang.Object

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

Method Detail

writeStringToFile

public static void writeStringToFile(java.lang.String contents,
                                     java.lang.String path)

Save a String to a file on disk using specified path. WARNING: This deletes the original file before it writes.

Parameters:

contents - to save to file on disk

path - to save file to.

readStringFromFile

public static java.lang.String readStringFromFile(java.lang.String path)

Read a file off disk into a String and return it. Expect weird stuff if the file is not textual.

Parameters:

path - of file to read in

Returns:

String containing file.

readByteArrayFromFile

public static byte[] readByteArrayFromFile(java.io.File fileToRead,
                                           long start,
                                           long end)

Read a file off disk into a byte array with specified range This can use lots of memory if you read a large file

Parameters:

fileToRead - File to read part of into byte array

start - index of read

end - index of read

Returns:

byte[] array from file.

getTailOfFile

public static java.lang.String getTailOfFile(java.lang.String pathToFile,
                                             java.lang.Integer lines)

Reads and returns the last n lines from a given file as string.

Parameters:

pathToFile - path to file

lines - size of the tail

Returns:

tail of file as string