content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * Licensed 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.
   */
  
  import java.lang.reflect.Constructor;
  import java.lang.reflect.Field;
  
  /**
   * PathClassLoader test.
   */
  public class Main {
  
      private static ClassLoader createClassLoader(String dexPath, ClassLoader parent) {
          try {
              Class<?> myClassLoaderClass = Class.forName("MyPathClassLoader");
              Constructor constructor = myClassLoaderClass.getConstructor(String.class,
                                                                          ClassLoader.class);
              return (ClassLoader)constructor.newInstance(dexPath, parent);
          } catch (Exception e) {
              // Ups, not available?!?!
              throw new RuntimeException(e);
          }
      }
  
      /**
       * Main entry point.
       */
      public static void main(String[] args) throws Exception {
          // Check the class-path for the second file. We'll use that one as the source of the
          // new classloader.
          String cp = System.getProperty("java.class.path");
          if (cp.split(System.getProperty("path.separator")).length != 1) {
              throw new IllegalStateException("Didn't find exactly one classpath element in " + cp);
          }
          if (!cp.endsWith("classloader2.jar")) {
              throw new IllegalStateException("Don't understand classpath " + cp);
          }
          cp = cp.replace("classloader2.jar", "classloader2-ex.jar");
  
          ClassLoader myClassLoader = createClassLoader(
                  cp, ClassLoader.getSystemClassLoader().getParent());
  
          // Now load our test class.
          Class<?> srcClass = A.class;
          Class<?> exClass = myClassLoader.loadClass("A");
  
          // First check: classes should be different.
          if (srcClass == exClass) {
              throw new IllegalStateException("Loaded class instances are the same");
          }
  
          // Secondary checks: get the static field values and make sure they aren't the same.
          String srcValue = (String)srcClass.getDeclaredField("value").get(null);
          if (!"Src-A".equals(srcValue)) {
              throw new IllegalStateException("Expected Src-A, found " + srcValue);
          }
          String exValue = (String)exClass.getDeclaredField("value").get(null);
          if (!"Ex-A".equals(exValue)) {
              throw new IllegalStateException("Expected Ex-A, found " + exValue);
          }
  
          // Try to load a dex file with bad dex code. Use new instance to force verification.
          try {
            Class<?> badClass = Main.class.getClassLoader().loadClass("B");
            badClass.newInstance();
            System.out.println("Should not be able to load class from bad dex file.");
          } catch (VerifyError e) {
          }
  
          // Make sure the same error is rethrown when reloading the bad class.
          try {
            Class<?> badClass = Main.class.getClassLoader().loadClass("B");
            System.out.println("Should not be able to load class from bad dex file.");
          } catch (VerifyError e) {
          }
  
          System.out.println("Everything OK.");
      }
  }
  