RepositoryClassLoader

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org.dinopolis.util.servicediscovery
Class RepositoryClassLoader

java.lang.Object
  java.lang.ClassLoader
      java.security.SecureClassLoader
          java.net.URLClassLoader
              org.dinopolis.util.servicediscovery.RepositoryClassLoader

public class RepositoryClassLoader
extends java.net.URLClassLoader

ClassLoader that allows to add all jar files in one or more repositories (directories). Additionally, a specific directory or a jar file can be added. This behavior allows to search in directories for jars even if they are not in the classpath (e.g. for plugin functionality).

Usage: create an instance of this classloader, add the repositories and urls the classloader should look for and call the loadClass method:

 RepositoryClassLoader loader = new RepositoryClassLoader();
 loader.addRepository("/home/cdaller/plugins");
 SuperPlugin plugin = (SuperPlugin)loader.loadClass("org.dinopolis.plugin.SuperPlugin").newInstance();

Nested Class Summary

Nested classes inherited from class java.net.URLClassLoader

Nested classes inherited from class java.lang.ClassLoader

Field Summary

static java.net.URL[] EMPTY_URL_ARRAY
          Simple empty URL[0] array.

protected java.util.Vector repositories_


Fields inherited from class java.net.URLClassLoader

Fields inherited from class java.security.SecureClassLoader

Fields inherited from class java.lang.ClassLoader

Constructor Summary

RepositoryClassLoader()
          Empty Constructor

RepositoryClassLoader(java.lang.ClassLoader parent)
          Constructor given a parent.

Method Summary

void addRepository(java.io.File repository)
          Add a new repository to the set of places this ClassLoader can look for classes to be loaded.

void addRepository(java.lang.String repository)
          Add a new repository to the set of places this ClassLoader can look for classes to be loaded.

void addURL(java.net.URL url)
          Append a URL to this loader's search path.

java.util.List getRepositories()
          Returns the repository names (in a list of Strings).

java.lang.String toString()
          Produce output suitable for debugging.

Methods inherited from class java.net.URLClassLoader

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

Methods inherited from class java.security.SecureClassLoader

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, wait, wait, wait

Field Detail

EMPTY_URL_ARRAY

public static final java.net.URL[] EMPTY_URL_ARRAY

Simple empty URL[0] array.

repositories_

protected java.util.Vector repositories_

Constructor Detail