kom.tools.util
Class Util

java.lang.Object
  |
  +--kom.tools.util.Util

public class Util

extends java.lang.Object

Some helpful utilities

Constructor Summary

Util()

Method Summary

static boolean	copyFile(java.io.File from, java.io.File to) Copies a file from one location to another
static boolean	copyFile(java.lang.String from, java.lang.String to) Copies a file from one location to another
static java.lang.String	currTime() Creates a string representing current time
static boolean	equal(java.lang.String s1, java.lang.String s2) Compares strings, null-safe
static int	getInt(java.lang.String value) Gets the value of a string in Integer format
static int	getInt(java.lang.String value, int defval) Gets the value of a string in Integer format
static long	getLong(java.lang.String value, long defval) Gets the Long value of the input string
static boolean	isNullOrEmpty(java.lang.String str) Tests for null or empty string
static void	purgeAllFiles(java.lang.String dir) Removes all files from a directory
static void	purgeFilesWithPrefix(java.lang.String dir, java.lang.String pre) Removes all files with a specific prefix from a directory.
static java.lang.String	rand() Generates a random number in String format
static java.lang.String	readLine(java.io.InputStream stream) Reads a line from an input stream
static java.lang.String	secTime(java.util.Date date) Creates a string representing time
static java.lang.String[]	string2array(java.lang.String v, java.lang.String d) Splits a String at delimiters into a String[] array.
static java.lang.String	toFile(java.lang.String name) "Sanitizes" a file name

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

isNullOrEmpty

public static boolean isNullOrEmpty(java.lang.String str)

Tests for null or empty string

Parameters:

str - The input string

Returns:

true if the input is null or an empty string

equal

public static final boolean equal(java.lang.String s1,
                                  java.lang.String s2)

Compares strings, null-safe

Parameters:

s1 - First String

s2 - Second String

Returns:

true if both are non-null and s1.equals(s2)

getInt

public static final int getInt(java.lang.String value)

Gets the value of a string in Integer format

Parameters:

value - The string (should be an Integer encoding of a number >= 0)

Returns:

-1 If the number is badly formed or the input is null, otherwise the converted integer.

getInt

public static final int getInt(java.lang.String value,
                               int defval)

Gets the value of a string in Integer format

Parameters:

value - The string (should be an Integer encoding of a number >= 0)

defval - Default value if string could not be parsed

Returns:

defval if the number is badly formed or the input is null, otherwise the converted value.

getLong

public static final long getLong(java.lang.String value,
                                 long defval)

Gets the Long value of the input string

Parameters:

value - The input string (should be a number >=0)

defval - Default value if string could not be parsed

Returns:

defval if the number is badly formed or the input is null, otherwise the converted value.

readLine

public static java.lang.String readLine(java.io.InputStream stream)

Reads a line from an input stream

Parameters:

stream - The input stream

Returns:

The line or null if no more data available.

copyFile

public static boolean copyFile(java.lang.String from,
                               java.lang.String to)

Copies a file from one location to another

Parameters:

from - The source file path

to - The destination path

Returns:

true If the copy action was ok

copyFile

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

Copies a file from one location to another

Parameters:

from - The source File

to - The destination File

Returns:

true If the copy action was ok

purgeAllFiles

public static void purgeAllFiles(java.lang.String dir)

Removes all files from a directory

Parameters:

dir - The directory name + any directory separator

purgeFilesWithPrefix

public static void purgeFilesWithPrefix(java.lang.String dir,
                                        java.lang.String pre)

Removes all files with a specific prefix from a directory.

Parameters:

dir - The directory (including any directory separator)

pre - The prefix for the file name

toFile

public static java.lang.String toFile(java.lang.String name)

"Sanitizes" a file name

Parameters:

name - The tentative file name

Returns:

the name string, with any '*' or ' ' replaced by '_'

rand

public static java.lang.String rand()

Generates a random number in String format

Returns:

a random string of digits

currTime

public static java.lang.String currTime()

Creates a string representing current time

Returns:

Time string, seconds since epoch start

secTime

public static java.lang.String secTime(java.util.Date date)

Creates a string representing time

Parameters:

date - Date value

Returns:

Time string, seconds since epoch start

string2array

public static java.lang.String[] string2array(java.lang.String v,
                                              java.lang.String d)

Splits a String at delimiters into a String[] array.

Parameters:

v - String. Example: "a,b,c" will be converted to String[] = {"a", "b", "c"} if d == ",".

d - String of delimiter characters