Examples of java.net.URLClassLoader

java.net.URLClassLoader
This class loader is used to load classes and resources from a search path of URLs referring to both JAR files and directories. Any URL that ends with a '/' is assumed to refer to a directory. Otherwise, the URL is assumed to refer to a JAR file which will be opened as needed.
The AccessControlContext of the thread that created the instance of URLClassLoader will be used when subsequently loading classes and resources.
The classes that are loaded are by default granted permission only to access the URLs specified when the URLClassLoader was created. @author David Connelly @version 1.91, 04/06/07 @since 1.2

            throw new DeployerException("Cannot get the URL for the deployable '" + earDeployable + "'.", e);
        }


        // Create a Root classloader for this EAR
        // Empty classloader
        ClassLoader earClassLoader = new URLClassLoader(new URL[0], Thread.currentThread().getContextClassLoader());


        // Get EJBs of this EAR
        List<EJB3Deployable> ejb3s = earDeployable.getEJB3Deployables();


        // Get the URLs of EJB, WEB and Clients

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        final URL tmpDirURL = URLUtils.fileToURL(this.tmpDir);


        PrivilegedAction<URLClassLoader> privilegedAction = new PrivilegedAction<URLClassLoader>() {
            public URLClassLoader run() {
                return new URLClassLoader(new URL[] {tmpDirURL}, Thread.currentThread().getContextClassLoader());
            }
        };
        this.endpointClassLoader = AccessController.doPrivileged(privilegedAction);


        ClassLoader oldCl = Thread.currentThread().getContextClassLoader();

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     *        URLClassLoader)
     * @param servletContextEvent the servlet context event
     */
    protected void addLib(final ClassLoader cl, final ServletContextEvent servletContextEvent) {
        // Get URL ClassLoader
        URLClassLoader urlCl = null;
        if (cl instanceof URLClassLoader) {
            urlCl = (URLClassLoader) cl;
        } else {
            throw new IllegalStateException("Parent classloader is not an URL classloader. Found '" + cl + "'.");
        }

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            EZBClassLoader currentCL = (EZBClassLoader) this.classLoader;
            return currentCL.duplicate();
        }
        // else, try to see if it's an URL classLoader
        if (this.classLoader instanceof URLClassLoader) {
            return new URLClassLoader(((URLClassLoader) this.classLoader).getURLs(), this.classLoader.getParent());
        }


        throw new IllegalStateException("Cannot build a new temporary classloader");
    }

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                    isCompatibleJMX);
            if(!isCompatibleJMX){
                classLoader = new JMXMeFirstClassLoader(classpath,
                        ModuleConfig.class.getClassLoader());
            }else{
                classLoader = new URLClassLoader(classpath,
                        ModuleConfig.class.getClassLoader());
            }
            classLoaders.put(key, classLoader);
        }
        return classLoader;

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   public static void addFile(File f) throws IOException 
   { addURL(f.toURL()); }
 
   public static void addURL(URL u) throws IOException 
   {
    URLClassLoader sysloader = (URLClassLoader) Thread.currentThread().getContextClassLoader();
    Class sysclass = URLClassLoader.class;
    try 
     { Method method = sysclass.getDeclaredMethod("addURL", new Class[] {URL.class} );
       method.setAccessible(true);
       method.invoke(sysloader, new Object[]{ u });

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            {
                m_outDebug.println( WrapperManager.getRes().getString( "    Classpath[0]=" ) + classURLs[0] );
            }
        }
        
        URLClassLoader cl = URLClassLoader.newInstance( classURLs, this.getClass().getClassLoader() );
        
        // Look for the specified class by name
        Class mainClass;
        try
        {

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            for (int i = 0; i < cld.getCount(); i++) {
                String id = cld.getArchiveNames()[i];
                configData = new ConnectorConfigData(id);


                URLClassLoader cl = new URLClassLoader(new URL[] {cld.getUrls()[i]});
                configData.setClassLoader(cl);


                Document dom = new SAXBuilder().build(cld.getConfigInputStreams()[i]);
                init(dom);

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   protected void testURLClassLoader(VirtualFile ear) throws Exception
   {
      URL[] cp = getEarClassPath(ear);
      log.error("ear classpath: "+Arrays.asList(cp));
      URLClassLoader loader = new URLClassLoader(cp);
      loader.loadClass("org.jboss.seam.example.booking.Hotel");
      loader.loadClass("org.jboss.seam.debug.Contexts");      
   }

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    public String toString() {
      return this.name;
    }
    
    public ImportFormat getInstance() throws MalformedURLException, ClassNotFoundException, InstantiationException, IllegalAccessException {
      URLClassLoader cl = new URLClassLoader(new URL[] {getBasePathUrl()});
      Class<?> clazz = Class.forName(className, true, cl);
      ImportFormat importFormat = (ImportFormat)clazz.newInstance();
      importFormat.setIsCustomImporter(true);
      return importFormat;
    }

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