Example usage for java.net URLClassLoader loadClass

Introduction

In this page you can find the example usage for java.net URLClassLoader loadClass.

Prototype

public Class<?> loadClass(String name) throws ClassNotFoundException 

Source Link

Document

Loads the class with the specified binary name.

Usage

From source file:fi.jumi.actors.maven.GenerateEventStubsMojo.java

private static Class<?> loadFromClasspath(String className, File[] classpath) throws ClassNotFoundException {
    try {/*from  w  w  w  . j  a  v  a  2s . c  o m*/
        URL[] urls = FileUtils.toURLs(classpath);
        URLClassLoader loader = new URLClassLoader(urls);
        return loader.loadClass(className);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

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From source file:org.superfuntime.chatty.Core.java

@SuppressWarnings("unchecked")
private static void startPlugins() {
    logger.info("Loading available plugins");
    final Collection<File> botJars = FileUtils.listFiles(pluginsDirecotry, new String[] { "jar" }, false);
    for (File botJar : botJars) {
        try {// ww w. java2  s .c  o m
            JarFile jar = new JarFile(botJar);
            InputStream is = jar.getInputStream(jar.getEntry("plugin.yml"));
            YAMLNode n = new YAMLNode(new Yaml().loadAs(is, Map.class), true);
            String mainClass = n.getString("mainClass");
            String name = n.getString("name");
            URLClassLoader loader = new URLClassLoader(new URL[] { botJar.toURI().toURL() },
                    Core.class.getClassLoader());
            Plugin plugin = loader.loadClass(mainClass).asSubclass(Plugin.class).newInstance();
            plugin.start();
            PLUGIN_INFO.put(name, new PluginInfo(name, plugin, n));
            logger.info("Loaded plugin '{}'", name);
        } catch (Exception e) {
            logger.error("Failed to load plugin from {}", botJar.getName());
            e.printStackTrace();
        }
    }
    logger.info("Loaded {} plugin(s)", PLUGIN_INFO.size());
}

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From source file:org.superfuntime.chatty.Core.java

@SuppressWarnings("unchecked")
private static void loadBots() {
    logger.info("Loading available bots");
    final Collection<File> botJars = FileUtils.listFiles(botsDirecotry, new String[] { "jar" }, false);
    for (File botJar : botJars) {
        try {// w  w  w .j a va2 s  .  c  o m
            JarFile jar = new JarFile(botJar);
            InputStream is = jar.getInputStream(jar.getEntry("bot.yml"));
            YAMLNode n = new YAMLNode(new Yaml().loadAs(is, Map.class), true);
            String mainClass = n.getString("mainClass");
            String type = n.getString("type");
            URLClassLoader loader = new URLClassLoader(new URL[] { botJar.toURI().toURL() },
                    Core.class.getClassLoader());
            BOT_INFO.put(type, new BotClassInfo(loader.loadClass(mainClass).asSubclass(Bot.class), n));
            logger.info("Loaded bot '{}'", type);
        } catch (Exception e) {
            logger.error("Failed to load bot from {}", botJar.getName());
            e.printStackTrace();
        }
    }
    logger.info("Loaded {} bot(s)", BOT_INFO.size());
}

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From source file:org.cmg.ml.sam.SamProjectHelper.java

public static Class<?> loadClassFromProject(ClassLoader parentClassLoader, Resource resource, IProject project)
        throws CoreException, MalformedURLException, ClassNotFoundException {
    String[] classPathEntries = JavaRuntime.computeDefaultRuntimeClassPath(JavaCore.create(project));
    //      URL url = JavaCore.create(project).getOutputLocation().toFile().
    //      List<URL> urlList = new ArrayList<URL>();
    //      for (int i = 0; i < classPathEntries.length; i++) {
    String entry = classPathEntries[0];
    IPath path = new Path(entry);
    URL url = path.toFile().toURI().toURL();
    //       urlList.add(url);
    //      }/*from  www. j ava2s.co  m*/
    //      ClassLoader parentClassLoader = project.getClass().getClassLoader();
    //      URL[] urls = (URL[]) urlList.toArray(new URL[urlList.size()]);
    //      URLClassLoader classLoader = new URLClassLoader(urls, cLoader);
    URLClassLoader classLoader = new URLClassLoader(new URL[] { url }, parentClassLoader);

    Class<?> clazz = classLoader.loadClass(SamProjectHelper.getPackageFolder(resource).replace('/', '.') + "."
            + SamProjectHelper.getClassName(resource));
    return clazz;
}

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From source file:org.panthercode.arctic.core.reflect.ReflectionUtils.java

/**
 * Creates a list of all classes from a specific jar file.
 *
 * @param path filepath to jar file//from   w  w  w  .  j a  v a2 s . com
 * @return Returns a list with all classes in jar file. If jar file doesn't contain any class, the list will be empty.
 * @throws IOException              Is thrown if an error occurs while reading the .jar file.
 * @throws ClassNotFoundException   Is thrown if the class is not found.
 * @throws IllegalArgumentException Is thrown if path is null.
 */
public static List<Class<?>> extractClassesFromJar(String path)
        throws IOException, ClassNotFoundException, IllegalArgumentException {
    ArgumentUtils.assertNotNull(path, "path");

    List<Class<?>> classList = new ArrayList<>();

    URL[] urlArray = { new URL("jar:file:" + path + "!/") };
    URLClassLoader classLoader = new URLClassLoader(urlArray);

    for (String className : ReflectionUtils.extractClassNamesFromJar(path)) {
        classList.add(classLoader.loadClass(className));
    }

    return classList;
}

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From source file:org.roda.core.util.ClassLoaderUtility.java

/**
 * Adds the given {@link URL}s to the classpath and creates an instance of the
 * given class.//from w ww . j  a v  a  2s . c  o  m
 * 
 * @param urls
 *          a list of {@link URL}s to be added to the classpath.
 * @param className
 *          the name of the class for which to create an instance.
 * @return the instance created.
 * 
 * @throws ClassNotFoundException
 * @throws IllegalAccessException
 * @throws InstantiationException
 */
public static Object createObject(URL[] urls, String className)
        throws ClassNotFoundException, InstantiationException, IllegalAccessException {

    if (StringUtils.isBlank(className)) {
        throw new IllegalArgumentException("className cannot be null");
    }

    URLClassLoader clazzLoader = new URLClassLoader(urls, CLASS_LOADER);

    LOGGER.trace("Loading class {} with ClassLoader {}", className, CLASS_LOADER.getClass().getSimpleName());

    return clazzLoader.loadClass(className).newInstance();
}

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From source file:org.roda.core.util.ClassLoaderUtility.java

/**
 * Adds the given file path to the classpath and creates an instance of the
 * given class name.//w  w w.  j  av a 2  s  .  c  o m
 * 
 * @param filePath
 *          the path of the file to add to the classpath.
 * @param className
 *          the name of the class for which to create an instance.
 * @return the instance created.
 * 
 * @throws IOException
 * @throws ClassNotFoundException
 * @throws IllegalAccessException
 * @throws InstantiationException
 */
public static Object createObject(String filePath, String className)
        throws ClassNotFoundException, InstantiationException, IllegalAccessException, IOException {

    if (StringUtils.isBlank(className)) {
        throw new IllegalArgumentException("className cannot be null");
    }

    ClassLoaderUtility.addFile(filePath);
    String path = "jar:file://" + filePath + "!/";
    URL url = new File(path).toURL();

    URLClassLoader clazzLoader = new URLClassLoader(new URL[] { url }, CLASS_LOADER);

    LOGGER.trace("Loading class {} with ClassLoader {}", className, CLASS_LOADER.getClass().getSimpleName());
    return clazzLoader.loadClass(className).newInstance();
}

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From source file:com.googlecode.dex2jar.test.TestUtils.java

public static File dex(List<File> files, File distFile) throws Exception {
    String dxJar = "src/test/resources/dx.jar";
    File dxFile = new File(dxJar);
    if (!dxFile.exists()) {
        throw new RuntimeException("dx.jar?");
    }//from w ww.ja v  a  2s . com
    URLClassLoader cl = new URLClassLoader(new URL[] { dxFile.toURI().toURL() });
    Class<?> c = cl.loadClass("com.android.dx.command.Main");
    Method m = c.getMethod("main", String[].class);

    if (distFile == null) {
        distFile = File.createTempFile("dex", ".dex");
    }
    List<String> args = new ArrayList<String>();
    args.addAll(Arrays.asList("--dex", "--no-strict", "--output=" + distFile.getCanonicalPath()));
    for (File f : files) {
        args.add(f.getCanonicalPath());
    }
    m.invoke(null, new Object[] { args.toArray(new String[0]) });
    return distFile;
}

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From source file:com.expedia.tesla.compiler.Util.java

/**
 * Load a Java class by it's full name.//from   www .  j  ava 2  s . c  o m
 * 
 * @param name
 *            The full name of the Java class to load.
 * @param urls
 *            An array of URL objects represent class paths or jar files.
 * @return The java.lang.Class object represents the Java class.
 * @throws ClassNotFoundException
 *             If the class is not found.
 * @throws IOException
 *             If the jar file cannot open.
 */
public static java.lang.Class<?> loadClass(String name, URL[] urls) throws ClassNotFoundException, IOException {
    java.lang.Class<?> clzz = null;
    if (urls != null && urls.length > 0) {
        URLClassLoader cl = URLClassLoader.newInstance(urls, Util.class.getClassLoader());
        clzz = cl.loadClass(name);
    }

    if (clzz == null) {
        clzz = Class.forName(name);
    }

    return clzz;
}

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From source file:io.fabric8.maven.core.util.MavenUtil.java

/**
 * Returns true if any of the given class names could be found on the given class loader
 *///from w  w  w .j a v  a2 s .co  m
public static boolean hasClass(MavenProject project, String... classNames) {
    URLClassLoader compileClassLoader = getCompileClassLoader(project);
    for (String className : classNames) {
        try {
            compileClassLoader.loadClass(className);
            return true;
        } catch (Throwable e) {
            // ignore
        }
    }
    return false;
}

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