org.xnap.loader
Class XNapClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          java.net.URLClassLoader
              org.xnap.loader.XNapClassLoader

public class XNapClassLoader
extends java.net.URLClassLoader

This class provides support to add additional jar files to the classpath.

Method Summary

void	add(java.lang.String[] files) Locates files in jar search path and adds them to the classpath.
void	add(java.net.URL url) Adds url to the classpath.
static boolean	areDependenciesSatisfied(java.lang.String[] depends) Returns true, if all depends are located in the jar search path.
static java.lang.String	getHomeDir() Returns the XNap preferences directory with a trailing file separator.
static XNapClassLoader	getInstance()
static java.io.File[]	getSearchPath() Returns the jar search path.
static java.lang.String	getURLsAsString()
static boolean	isLoaded(java.net.URL url) Returns true if url has been already loaded
static java.io.File	locate(java.lang.String filename) Searches the jar search path for filename and returns a File object.

Methods inherited from class java.net.URLClassLoader

addURL, definePackage, findClass, findResource, findResources, getPermissions, getURLs, newInstance, newInstance

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findLibrary, findLoadedClass, findSystemClass, getPackage, getPackages, getParent, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, loadClass, loadClass, resolveClass, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static XNapClassLoader getInstance()

add

public void add(java.net.URL url)
         throws java.io.IOException

Adds url to the classpath.

Throws:

java.io.IOException

add

public void add(java.lang.String[] files)
         throws java.io.IOException

Locates files in jar search path and adds them to the classpath.

Throws:

java.io.IOException - if a file can not be found or is not a valid jar file

See Also:

locate(String)

areDependenciesSatisfied

public static boolean areDependenciesSatisfied(java.lang.String[] depends)

Returns true, if all depends are located in the jar search path.

getHomeDir

public static java.lang.String getHomeDir()

Returns the XNap preferences directory with a trailing file separator.

getURLsAsString

public static java.lang.String getURLsAsString()

getSearchPath

public static java.io.File[] getSearchPath()

Returns the jar search path.

locate

public static java.io.File locate(java.lang.String filename)

Searches the jar search path for filename and returns a File object.

Returns:

null, if filename was not found; the file, otherwise

See Also:

locate(String)

isLoaded

public static boolean isLoaded(java.net.URL url)

Returns true if url has been already loaded