content: /*
   * Copyright (C) 2008 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.io.File;
  import java.io.IOException;
  import java.lang.reflect.Constructor;
  import java.lang.reflect.Method;
  import java.util.Enumeration;
  
  /**
   * DexFile tests (Dalvik-specific).
   */
  public class Main {
      private static final String CLASS_PATH = System.getenv("DEX_LOCATION") + "/071-dexfile-ex.jar";
      private static final String ODEX_DIR = System.getenv("DEX_LOCATION");
      private static final String ODEX_ALT = "/tmp";
      private static final String LIB_DIR = "/nowhere/nothing/";
  
      private static final String getOdexDir() {
          return new File(ODEX_DIR).isDirectory() ? ODEX_DIR : ODEX_ALT;
      }
  
      /**
       * Prep the environment then run the test.
       */
      public static void main(String[] args) throws Exception {
          /*
           * Create a sub-process to see if the ProcessManager wait
           * interferes with the dexopt invocation wait.
           *
           * /dev/random never hits EOF, so we're sure that we'll still
           * be waiting for the process to complete.  On the device it
           * stops pretty quickly (which means the child won't be
           * spinning).
           */
          ProcessBuilder pb = new ProcessBuilder("cat", "/dev/random");
          Process p = pb.start();
  
          testDexClassLoader();
          testDexFile();
  
          // shouldn't be necessary, but it's good to be tidy
          p.destroy();
          // let the ProcessManager's daemon thread finish before we shut down
          // (avoids the occasional segmentation fault)
          Thread.sleep(500);
          System.out.println("done");
      }
  
      /**
       * Create a class loader, explicitly specifying the source DEX and
       * the location for the optimized DEX.
       */
      private static void testDexClassLoader() throws Exception {
          ClassLoader dexClassLoader = getDexClassLoader();
          Class Another = dexClassLoader.loadClass("Another");
          Object another = Another.newInstance();
          // not expected to work; just exercises the call
          dexClassLoader.getResource("nonexistent");
      }
  
      /*
       * Create an instance of DexClassLoader.  The test harness doesn't
       * have visibility into dalvik.system.*, so we do this through
       * reflection.
       */
      private static ClassLoader getDexClassLoader() throws Exception {
          ClassLoader classLoader = Main.class.getClassLoader();
          Class DexClassLoader = classLoader.loadClass("dalvik.system.DexClassLoader");
          Constructor DexClassLoader_init = DexClassLoader.getConstructor(String.class,
                                                                          String.class,
                                                                          String.class,
                                                                          ClassLoader.class);
          // create an instance, using the path we found
          return (ClassLoader) DexClassLoader_init.newInstance(CLASS_PATH, getOdexDir(), LIB_DIR, classLoader);
      }
  
      private static void testDexFile() throws Exception {
          ClassLoader classLoader = Main.class.getClassLoader();
          Class DexFile = classLoader.loadClass("dalvik.system.DexFile");
          Method DexFile_loadDex = DexFile.getMethod("loadDex",
                                                     String.class,
                                                     String.class,
                                                     Integer.TYPE);
          Method DexFile_entries = DexFile.getMethod("entries");
          Object dexFile = DexFile_loadDex.invoke(null, CLASS_PATH, null, 0);
          Enumeration<String> e = (Enumeration<String>) DexFile_entries.invoke(dexFile);
          while (e.hasMoreElements()) {
              String className = e.nextElement();
              System.out.println(className);
          }
      }
  }
  