| gvSIG desktop 1

import java.io.FileFilter;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.Enumeration;

import java.util.Hashtable;

import java.util.jar.JarException;

import java.util.zip.ZipEntry;

import java.util.zip.ZipException;

import java.util.zip.ZipFile;

import org.apache.log4j.Logger;

	private static Hashtable clasesJar = new Hashtable();

		//registerClasses();

	private static void registerClasses() throws Exception {

		RasterClassLoader loader = new RasterClassLoader();

		//Cargamos sobre jarList todos los File correspondientes a los jar contenidos en pathExtensions

		File[] jarList = null;

			File directory = new File(pathExtensions[iPath]);

			if (directory.isDirectory() && directory.canRead()) {

				jarList = directory.listFiles(new FileFilter() {

												public boolean accept(File pathname) {

														return (pathname.getName().toUpperCase().endsWith(".JAR"));

												}

											  });

		//Creamos las URL

		URL[] urls = new URL[jarList.length];

		for (int j = 0; j < jarList.length; j++) {

			try {

				urls[j] = new URL("file:" + jarList[j]);

			} catch (MalformedURLException e) {

				Logger.getLogger(RasterLibrary.class.getName()).debug("Error formando la URL, jar incorrecto", e);

			}

		}

		//Comprobamos que no haya clases repetidas

		ZipFile[] jarFiles = new ZipFile[jarList.length];

		for (int i = 0; i < jarList.length; i++) {

			try {

				jarFiles[i] = new ZipFile(jarList[i].getPath());

				Enumeration entradas = jarFiles[i].entries();

				while (entradas.hasMoreElements()) {

					ZipEntry file = (ZipEntry) entradas.nextElement();

					String fileName = file.getName();

					if (!fileName.toLowerCase().endsWith(".class")) 

						continue;

					fileName = fileName.substring(0, fileName.length() - 6).replace('/', '.');

					if (clasesJar.get(fileName) != null) {

						throw new JarException("CLASES REPETIDAS: " + fileName + " " + " en " +

								jarFiles[i].getName() + " y en " + ((ZipFile) clasesJar.get(fileName)).getName());

					}

					clasesJar.put(fileName, jarFiles[i]);

				}

			} catch (ZipException e) {

				throw new IOException(" Jar: " + jarList[i].getPath() + ": " + jarFiles[i]);

			} catch (IOException e) {

				throw e;

			}

		}