com.antelmann.util
Class Misc

java.lang.Object
  com.antelmann.util.Misc

public final class Misc
extends Object

just some miscellaneous stuff for convenience that doesn't fit anywhere else

Author:

Holger Antelmann

Field Summary

static UniversalComparator

comparator a universally useful instance of a Comparator

Method Summary

static Properties	asProperties(ResourceBundle bundle)
static KeyPair	generateKeyPair()
static KeyPair	generateKeyPair(int keySize)
static KeyPair	generateKeyPair(String algorithm, int keySize)
static URLClassLoader	loadClasses(File... dirOrJar) preloads all classes found in the given directories and/or Jar files
static URLClassLoader	loadClasses(Monitor monitor, File... dirOrJar) preloads all classes found in the given directories and/or Jar files
static URLClassLoader	loadFromClassPath(Monitor mon, String path) preloads all classes found in the given path
static URLClassLoader	loadFromClassPath(String path) preloads all classes found in the given path
static String	makeURLString(File file) generates a URL-like String of the form "file:///..
static void	pause(long millisec) just simplifies a call to Thread.sleep()
static <T> Comparator<T>	reverseComparator(Comparator<T> comp) returns an inversed filter to the given one
static <T> Filter<T>	reverseFilter(Filter<T> filter) returns an inversed filter to the given one
static boolean	same(Object s1, Object s2) returns true only if the the both objects are equal or both null, false otherwise
static Process	start(String... params) starts a given file and other parameters with the platform specific application.startCommand in the settings.
static boolean	start(URL url) This method attempts to start the given url with the associated default application (most likely a web-browser) by calling start urlPath.

Methods inherited from class java.lang.Object

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

Field Detail

comparator

public static final UniversalComparator comparator

a universally useful instance of a Comparator

Method Detail

loadFromClassPath

public static URLClassLoader loadFromClassPath(String path)
                                        throws IOException

preloads all classes found in the given path

Returns:

the ClassLoader created to load the classes

Throws:

IOException

loadFromClassPath

public static URLClassLoader loadFromClassPath(Monitor mon,
                                               String path)
                                        throws IOException

preloads all classes found in the given path

Parameters:

mon - allows to individually monitor the loading process

path - the path to load the classes from

Returns:

the ClassLoader created to load the classes

Throws:

IOException

loadClasses

public static URLClassLoader loadClasses(File... dirOrJar)
                                  throws IOException

preloads all classes found in the given directories and/or Jar files

Parameters:

dirOrJar - Jar files or directories that are to be loaded

Returns:

the ClassLoader created to load the classes

Throws:

IOException

loadClasses

public static URLClassLoader loadClasses(Monitor monitor,
                                         File... dirOrJar)
                                  throws IOException

preloads all classes found in the given directories and/or Jar files

Parameters:

monitor - allows to individually monitor the loading process

dirOrJar - Jar files or directories that are to be loaded

Returns:

the ClassLoader created to load the classes

Throws:

IOException

makeURLString

public static String makeURLString(File file)
                            throws IOException

generates a URL-like String of the form "file:///.." using its canonical path and adds a slash at the end if the given file is a directory

Throws:

IOException

reverseFilter

public static <T> Filter<T> reverseFilter(Filter<T> filter)

returns an inversed filter to the given one

reverseComparator

public static <T> Comparator<T> reverseComparator(Comparator<T> comp)

returns an inversed filter to the given one

start

public static boolean start(URL url)

This method attempts to start the given url with the associated default application (most likely a web-browser) by calling start urlPath. If this doesn't work, nothing happens; errors are ignored. The method uses the parameter application.startCommand from the Properties obtained from Settings.getProperties() to start the url. Note that a successful call to this method is platform dependent; you may have to adjust the application.startCommand parameter to make this work for your platform. The different command parts of the application.startCommand are separated by a tab (\t). The default value for this parameter shipped with the antelmann.jar file works for Windows NT/2000/XP.

Returns:

true if no exceptions were thrown, false otherwise

See Also:

Settings.getProperties()

start

public static Process start(String... params)
                     throws IOException

starts a given file and other parameters with the platform specific application.startCommand in the settings. The different command parts of the application.startCommand are separated by a tab (\t) and the given params are added to the command list.

Throws:

IOException

See Also:

Settings.getProperties()

pause

public static void pause(long millisec)

just simplifies a call to Thread.sleep()

asProperties

public static Properties asProperties(ResourceBundle bundle)

generateKeyPair

public static KeyPair generateKeyPair()

generateKeyPair

public static KeyPair generateKeyPair(int keySize)

generateKeyPair

public static KeyPair generateKeyPair(String algorithm,
                                      int keySize)
                               throws NoSuchAlgorithmException

Throws:

NoSuchAlgorithmException

same

public static boolean same(Object s1,
                           Object s2)

returns true only if the the both objects are equal or both null, false otherwise