Examples of jodd.util.cl.ExtendedURLClassLoader

jodd.util.cl.ExtendedURLClassLoader
Class loader that offers two loading strategies: parent-first and parent-last. Extends URLClassLoader (for now:) to provide just minimal set of modifications.
When parent-last strategy is used, be aware how you use {@link jodd.util.ClassLoaderUtil} asit is designed to follow parent-first strategy.


    defaultClassLoaderStrategy.setLoadArrayClassByComponentTypes(true);


    URLClassLoader parentClassloader = (URLClassLoader)this.getClass().getClassLoader();
    URL[] urls = parentClassloader.getURLs();
    ExtendedURLClassLoader excl = new ExtendedURLClassLoader(urls, parentClassloader, false);


    Class dummyClass = ClassLoaderUtil.loadClass(dummyClassName, excl);
    assertFalse(Dummy.class == dummyClass); // classes are NOT the same as they are loaded by different class loaders
    assertEquals(Dummy.class.getName(), dummyClass.getName());

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  @Test
  public void testLoadSystemClasses() throws ClassNotFoundException {
    URL[] urls = new URL[0];


    // parent-first
    ExtendedURLClassLoader cl1 = new ExtendedURLClassLoader(urls, null, true);


    Class c1 = cl1.loadClass("java.lang.String");
    assertEquals(String.class, c1);


    // parent-last, still loaded by system loader
    ExtendedURLClassLoader cl2 = new ExtendedURLClassLoader(urls, null, false);


    Class c2 = cl2.loadClass("java.lang.String");
    assertEquals(String.class, c2);


    assertEquals(c1, c2);
  }

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    URL[] urls = thisClassLoader.getURLs();


    String packageName = this.getClass().getPackage().getName();


    // parent-first
    ExtendedURLClassLoader cl1 = new ExtendedURLClassLoader(urls, null, true);


    Class c1 = cl1.loadClass(packageName + ".testdata.A");


    // parent-last, still loaded by system loader
    ExtendedURLClassLoader cl2 = new ExtendedURLClassLoader(urls, null, false);


    Class c2 = cl2.loadClass(packageName + ".testdata.A");


    assertFalse(c1.equals(c2));


    assertEquals(c1.getName(), c2.getName());
  }

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    FileUtil.writeString(resourceFile, "RESOURCE CONTENT");
    resourceFile.deleteOnExit();


    URL[] urls = new URL[] {FileUtil.toURL(temp)};


    ExtendedURLClassLoader cl1 = new ExtendedURLClassLoader(urls, null, true);


    URL res = cl1.getResource("data");


    assertEquals(res, FileUtil.toURL(resourceFile));


    Enumeration<URL> enums = cl1.getResources("data");


    assertTrue(enums.hasMoreElements());
    assertEquals(res, enums.nextElement());


    FileUtil.deleteDir(temp);

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Related Classes of jodd.util.cl.ExtendedURLClassLoader

jodd.util.ClassLoaderUtilTest

jodd.util.ExtendedURLClassLoaderTest

java.net.URL

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