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Source Code of NonURLAncestor$NonURLLoader

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* @test
* @bug 4857361
* @bug 4863274
* @summary When the context class loader or an ancestor of the
* context class loader is chosen because of a boomerang match, or
* when the context class loader is chosen because of a null codebase
* argument (and the default loader was not used), and this chosen
* loader is not a URLClassLoader, then there should not be a
* ClassCastException because of an assumption that the chosen loader
* is a URLClassLoader while checking permissions.  Also, the
* permissions checked should always be for the URLs of the codebase
* argument, not the "import" URLs of the chosen loader.
*
* @build NonURLAncestor Foo
* @run main/othervm/policy=security.policy NonURLAncestor
*/

import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import java.rmi.server.RMIClassLoader;
import net.jini.loader.ClassAnnotation;
import net.jini.loader.pref.PreferredClassLoader;

public class NonURLAncestor {

    private static final String CLASS_NAME = "Foo";
    private static final String[] INTERFACE_NAMES = { "Foo" };

    public static void main(String[] args) throws Exception {
  System.err.println("\nRegression test for bug 4857361\n");

  if (System.getSecurityManager() == null) {
      System.setSecurityManager(new SecurityManager());
  }

  String testsrc = System.getProperty("test.src", ".");
  String testclasses = System.getProperty("test.classes", ".");

  URL[] codebaseURLs = new URL[] {
      (new File(testsrc)).toURI().toURL(),
      (new File(testclasses)).toURI().toURL()
  };

  String codebase =
      codebaseURLs[0].toExternalForm() + " " +
      codebaseURLs[1].toExternalForm();

  System.err.println("codebase: \"" + codebase + "\"");

  ClassLoader nonURLLoader =
      new NonURLLoader(codebase,
           NonURLAncestor.class.getClassLoader());

  Class c;
  ClassLoader l;

  /*
   * Make sure that we are preferring the class from the
   * codebase as expected:
   */
  c = RMIClassLoader.loadClass(null, CLASS_NAME, null);
  check(c.getClassLoader(), Foo.class.getClassLoader());
  c = RMIClassLoader.loadClass(codebase, CLASS_NAME, null);
  check(Boolean.valueOf(c.getClassLoader() instanceof PreferredClassLoader), Boolean.TRUE);

  /*
   * Try with the context class loader being a
   * non-URLClassLoader and null codebase arguments:
   */
  Thread.currentThread().setContextClassLoader(nonURLLoader);

  c = RMIClassLoader.loadClass(null, CLASS_NAME, null);
  check(c.getClassLoader(), Foo.class.getClassLoader());
  c = RMIClassLoader.loadProxyClass(null, INTERFACE_NAMES, null);
  check(c.getClassLoader(), nonURLLoader);
  l = RMIClassLoader.getClassLoader(null);
  check(l, nonURLLoader);

  /*
   * Try with the context class loader being a
   * non-URLClassLoader and matching codebase arguments:
   */
  c = RMIClassLoader.loadClass(codebase, CLASS_NAME, null);
  check(c.getClassLoader(), Foo.class.getClassLoader());
  c = RMIClassLoader.loadProxyClass(codebase, INTERFACE_NAMES, null);
  check(c.getClassLoader(), nonURLLoader);
  l = RMIClassLoader.getClassLoader(codebase);
  check(l, nonURLLoader);

  /*
   * Try with the parent of the context class loader being a
   * non-URLClassLoader and matching codebase arguments:
   */
  Thread.currentThread().setContextClassLoader(
      new URLClassLoader(new URL[0], nonURLLoader));

  c = RMIClassLoader.loadClass(codebase, CLASS_NAME, null);
  check(c.getClassLoader(), Foo.class.getClassLoader());
  c = RMIClassLoader.loadProxyClass(codebase, INTERFACE_NAMES, null);
  check(c.getClassLoader(), nonURLLoader);
  l = RMIClassLoader.getClassLoader(codebase);
  check(l, nonURLLoader);

  /*
   * Try with the parent of the context class loader being a
   * URLClassLoader with a matching annotation but different
   * import URLs-- should not prevent (because of lack of
   * permission for its import URLs) leapfrogging intermediate
   * preferred loader:
   */
  ClassLoader matchingURLLoader =
      new URLLoader(new URL[] { new URL("http://java.sun.com/") },
        codebase, NonURLAncestor.class.getClassLoader());
  ClassLoader nonmatchingPreferredLoader =
      new PreferredClassLoader(codebaseURLs, matchingURLLoader,
             "", false);
  Thread.currentThread().setContextClassLoader(
      nonmatchingPreferredLoader);

  c = RMIClassLoader.loadClass(codebase, CLASS_NAME, null);
  check(c.getClassLoader(), Foo.class.getClassLoader());
  c = RMIClassLoader.loadProxyClass(codebase, INTERFACE_NAMES, null);
  check(c.getClassLoader(), matchingURLLoader);
  l = RMIClassLoader.getClassLoader(codebase);
  check(l, matchingURLLoader);

  System.err.println("TEST PASSED");
    }

    private static class NonURLLoader
  extends ClassLoader
  implements ClassAnnotation
    {
  private final String annotation;

  NonURLLoader(String annotation, ClassLoader parent) {
      super(parent);
      this.annotation = annotation;
  }

  public String getClassAnnotation() {
      return annotation;
  }
    }

    private static class URLLoader
  extends URLClassLoader
  implements ClassAnnotation
    {
  private final String annotation;

  URLLoader(URL[] urls, String annotation, ClassLoader parent) {
      super(urls, parent);
      this.annotation = annotation;
  }

  public String getClassAnnotation() {
      return annotation;
  }
    }

    private static void check(Object actual, Object expected) {
  if (actual != expected) {
      throw new AssertionError("\nexpected: " + expected +
             "\n  actual: " + actual);
  }
    }
}
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